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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-07 00:22:01 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-07 00:22:01 +0200 |
| commit | 3b69e8b4571125bec1f77f886174fe6cab6b9d75 (patch) | |
| tree | 4a125694310d161b6cb3097c4bf7542e97919987 /arch/sh/kernel | |
| parent | Merge tag 'kconfig-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mas... (diff) | |
| parent | sh: remove sh5 support (diff) | |
| download | linux-3b69e8b4571125bec1f77f886174fe6cab6b9d75.tar.xz linux-3b69e8b4571125bec1f77f886174fe6cab6b9d75.zip | |
Merge tag 'sh-for-5.8' of git://git.libc.org/linux-sh
Pull arch/sh updates from Rich Felker:
"Fix for arch/sh build regression with newer binutils, removal of SH5,
fixes for module exports, and misc cleanup"
* tag 'sh-for-5.8' of git://git.libc.org/linux-sh:
sh: remove sh5 support
sh: add missing EXPORT_SYMBOL() for __delay
sh: Convert ins[bwl]/outs[bwl] macros to inline functions
sh: Convert iounmap() macros to inline functions
sh: Add missing DECLARE_EXPORT() for __ashiftrt_r4_xx
sh: configs: Cleanup old Kconfig IO scheduler options
arch/sh: vmlinux.scr
sh: Replace CONFIG_MTD_M25P80 with CONFIG_MTD_SPI_NOR in sh7757lcr_defconfig
sh: sh4a: Bring back tmu3_device early device
Diffstat (limited to 'arch/sh/kernel')
28 files changed, 33 insertions, 6447 deletions
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index 59673f8a3379..b0f5574b6228 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -3,7 +3,7 @@ # Makefile for the Linux/SuperH kernel. # -extra-y := head_$(BITS).o vmlinux.lds +extra-y := head_32.o vmlinux.lds ifdef CONFIG_FUNCTION_TRACER # Do not profile debug and lowlevel utilities @@ -13,26 +13,26 @@ endif CFLAGS_REMOVE_return_address.o = -pg obj-y := debugtraps.o dumpstack.o \ - idle.o io.o irq.o irq_$(BITS).o kdebugfs.o \ + idle.o io.o irq.o irq_32.o kdebugfs.o \ machvec.o nmi_debug.o process.o \ - process_$(BITS).o ptrace.o ptrace_$(BITS).o \ + process_32.o ptrace.o ptrace_32.o \ reboot.o return_address.o \ - setup.o signal_$(BITS).o sys_sh.o \ - syscalls_$(BITS).o time.o topology.o traps.o \ - traps_$(BITS).o unwinder.o + setup.o signal_32.o sys_sh.o \ + syscalls_32.o time.o topology.o traps.o \ + traps_32.o unwinder.o ifndef CONFIG_GENERIC_IOMAP obj-y += iomap.o obj-$(CONFIG_HAS_IOPORT_MAP) += ioport.o endif -obj-$(CONFIG_SUPERH32) += sys_sh32.o +obj-y += sys_sh32.o obj-y += cpu/ obj-$(CONFIG_VSYSCALL) += vsyscall/ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_SH_STANDARD_BIOS) += sh_bios.o obj-$(CONFIG_KGDB) += kgdb.o -obj-$(CONFIG_MODULES) += sh_ksyms_$(BITS).o module.o +obj-$(CONFIG_MODULES) += sh_ksyms_32.o module.o obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_CRASH_DUMP) += crash_dump.o obj-$(CONFIG_STACKTRACE) += stacktrace.o diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile index f7c22ea98b0f..46118236bf04 100644 --- a/arch/sh/kernel/cpu/Makefile +++ b/arch/sh/kernel/cpu/Makefile @@ -7,7 +7,6 @@ obj-$(CONFIG_CPU_SH2) = sh2/ obj-$(CONFIG_CPU_SH2A) = sh2a/ obj-$(CONFIG_CPU_SH3) = sh3/ obj-$(CONFIG_CPU_SH4) = sh4/ -obj-$(CONFIG_CPU_SH5) = sh5/ # Special cases for family ancestry. diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c index ce7291e12a30..1d008745877f 100644 --- a/arch/sh/kernel/cpu/init.c +++ b/arch/sh/kernel/cpu/init.c @@ -103,7 +103,7 @@ void __attribute__ ((weak)) l2_cache_init(void) /* * Generic first-level cache init */ -#if defined(CONFIG_SUPERH32) && !defined(CONFIG_CPU_J2) +#if !defined(CONFIG_CPU_J2) static void cache_init(void) { unsigned long ccr, flags; diff --git a/arch/sh/kernel/cpu/irq/Makefile b/arch/sh/kernel/cpu/irq/Makefile index 8b91cb96411b..e4578cde46ba 100644 --- a/arch/sh/kernel/cpu/irq/Makefile +++ b/arch/sh/kernel/cpu/irq/Makefile @@ -2,6 +2,5 @@ # # Makefile for the Linux/SuperH CPU-specific IRQ handlers. # -obj-$(CONFIG_SUPERH32) += imask.o -obj-$(CONFIG_CPU_SH5) += intc-sh5.o +obj-y += imask.o obj-$(CONFIG_CPU_HAS_IPR_IRQ) += ipr.o diff --git a/arch/sh/kernel/cpu/irq/intc-sh5.c b/arch/sh/kernel/cpu/irq/intc-sh5.c deleted file mode 100644 index 1b3050facda8..000000000000 --- a/arch/sh/kernel/cpu/irq/intc-sh5.c +++ /dev/null @@ -1,194 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/cpu/irq/intc-sh5.c - * - * Interrupt Controller support for SH5 INTC. - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 Paul Mundt - * - * Per-interrupt selective. IRLM=0 (Fixed priority) is not - * supported being useless without a cascaded interrupt - * controller. - */ -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/bitops.h> -#include <cpu/irq.h> -#include <asm/page.h> - -/* - * Maybe the generic Peripheral block could move to a more - * generic include file. INTC Block will be defined here - * and only here to make INTC self-contained in a single - * file. - */ -#define INTC_BLOCK_OFFSET 0x01000000 - -/* Base */ -#define INTC_BASE PHYS_PERIPHERAL_BLOCK + \ - INTC_BLOCK_OFFSET - -/* Address */ -#define INTC_ICR_SET (intc_virt + 0x0) -#define INTC_ICR_CLEAR (intc_virt + 0x8) -#define INTC_INTPRI_0 (intc_virt + 0x10) -#define INTC_INTSRC_0 (intc_virt + 0x50) -#define INTC_INTSRC_1 (intc_virt + 0x58) -#define INTC_INTREQ_0 (intc_virt + 0x60) -#define INTC_INTREQ_1 (intc_virt + 0x68) -#define INTC_INTENB_0 (intc_virt + 0x70) -#define INTC_INTENB_1 (intc_virt + 0x78) -#define INTC_INTDSB_0 (intc_virt + 0x80) -#define INTC_INTDSB_1 (intc_virt + 0x88) - -#define INTC_ICR_IRLM 0x1 -#define INTC_INTPRI_PREGS 8 /* 8 Priority Registers */ -#define INTC_INTPRI_PPREG 8 /* 8 Priorities per Register */ - - -/* - * Mapper between the vector ordinal and the IRQ number - * passed to kernel/device drivers. - */ -int intc_evt_to_irq[(0xE20/0x20)+1] = { - -1, -1, -1, -1, -1, -1, -1, -1, /* 0x000 - 0x0E0 */ - -1, -1, -1, -1, -1, -1, -1, -1, /* 0x100 - 0x1E0 */ - 0, 0, 0, 0, 0, 1, 0, 0, /* 0x200 - 0x2E0 */ - 2, 0, 0, 3, 0, 0, 0, -1, /* 0x300 - 0x3E0 */ - 32, 33, 34, 35, 36, 37, 38, -1, /* 0x400 - 0x4E0 */ - -1, -1, -1, 63, -1, -1, -1, -1, /* 0x500 - 0x5E0 */ - -1, -1, 18, 19, 20, 21, 22, -1, /* 0x600 - 0x6E0 */ - 39, 40, 41, 42, -1, -1, -1, -1, /* 0x700 - 0x7E0 */ - 4, 5, 6, 7, -1, -1, -1, -1, /* 0x800 - 0x8E0 */ - -1, -1, -1, -1, -1, -1, -1, -1, /* 0x900 - 0x9E0 */ - 12, 13, 14, 15, 16, 17, -1, -1, /* 0xA00 - 0xAE0 */ - -1, -1, -1, -1, -1, -1, -1, -1, /* 0xB00 - 0xBE0 */ - -1, -1, -1, -1, -1, -1, -1, -1, /* 0xC00 - 0xCE0 */ - -1, -1, -1, -1, -1, -1, -1, -1, /* 0xD00 - 0xDE0 */ - -1, -1 /* 0xE00 - 0xE20 */ -}; - -static unsigned long intc_virt; -static int irlm; /* IRL mode */ - -static void enable_intc_irq(struct irq_data *data) -{ - unsigned int irq = data->irq; - unsigned long reg; - unsigned long bitmask; - - if ((irq <= IRQ_IRL3) && (irlm == NO_PRIORITY)) - printk("Trying to use straight IRL0-3 with an encoding platform.\n"); - - if (irq < 32) { - reg = INTC_INTENB_0; - bitmask = 1 << irq; - } else { - reg = INTC_INTENB_1; - bitmask = 1 << (irq - 32); - } - - __raw_writel(bitmask, reg); -} - -static void disable_intc_irq(struct irq_data *data) -{ - unsigned int irq = data->irq; - unsigned long reg; - unsigned long bitmask; - - if (irq < 32) { - reg = INTC_INTDSB_0; - bitmask = 1 << irq; - } else { - reg = INTC_INTDSB_1; - bitmask = 1 << (irq - 32); - } - - __raw_writel(bitmask, reg); -} - -static struct irq_chip intc_irq_type = { - .name = "INTC", - .irq_enable = enable_intc_irq, - .irq_disable = disable_intc_irq, -}; - -void __init plat_irq_setup(void) -{ - unsigned long long __dummy0, __dummy1=~0x00000000100000f0; - unsigned long reg; - int i; - - intc_virt = (unsigned long)ioremap(INTC_BASE, 1024); - if (!intc_virt) { - panic("Unable to remap INTC\n"); - } - - - /* Set default: per-line enable/disable, priority driven ack/eoi */ - for (i = 0; i < NR_INTC_IRQS; i++) - irq_set_chip_and_handler(i, &intc_irq_type, handle_level_irq); - - - /* Disable all interrupts and set all priorities to 0 to avoid trouble */ - __raw_writel(-1, INTC_INTDSB_0); - __raw_writel(-1, INTC_INTDSB_1); - - for (reg = INTC_INTPRI_0, i = 0; i < INTC_INTPRI_PREGS; i++, reg += 8) - __raw_writel( NO_PRIORITY, reg); - - -#ifdef CONFIG_SH_CAYMAN - { - unsigned long data; - - /* Set IRLM */ - /* If all the priorities are set to 'no priority', then - * assume we are using encoded mode. - */ - irlm = platform_int_priority[IRQ_IRL0] + - platform_int_priority[IRQ_IRL1] + - platform_int_priority[IRQ_IRL2] + - platform_int_priority[IRQ_IRL3]; - if (irlm == NO_PRIORITY) { - /* IRLM = 0 */ - reg = INTC_ICR_CLEAR; - i = IRQ_INTA; - printk("Trying to use encoded IRL0-3. IRLs unsupported.\n"); - } else { - /* IRLM = 1 */ - reg = INTC_ICR_SET; - i = IRQ_IRL0; - } - __raw_writel(INTC_ICR_IRLM, reg); - - /* Set interrupt priorities according to platform description */ - for (data = 0, reg = INTC_INTPRI_0; i < NR_INTC_IRQS; i++) { - data |= platform_int_priority[i] << - ((i % INTC_INTPRI_PPREG) * 4); - if ((i % INTC_INTPRI_PPREG) == (INTC_INTPRI_PPREG - 1)) { - /* Upon the 7th, set Priority Register */ - __raw_writel(data, reg); - data = 0; - reg += 8; - } - } - } -#endif - - /* - * And now let interrupts come in. - * sti() is not enough, we need to - * lower priority, too. - */ - __asm__ __volatile__("getcon " __SR ", %0\n\t" - "and %0, %1, %0\n\t" - "putcon %0, " __SR "\n\t" - : "=&r" (__dummy0) - : "r" (__dummy1)); -} diff --git a/arch/sh/kernel/cpu/proc.c b/arch/sh/kernel/cpu/proc.c index 85961b4f9c69..a306bcd6b341 100644 --- a/arch/sh/kernel/cpu/proc.c +++ b/arch/sh/kernel/cpu/proc.c @@ -24,7 +24,6 @@ static const char *cpu_name[] = { [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785", [CPU_SH7786] = "SH7786", [CPU_SH7757] = "SH7757", [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3", - [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103", [CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723", [CPU_SH7366] = "SH7366", [CPU_SH7724] = "SH7724", [CPU_SH7372] = "SH7372", [CPU_SH7734] = "SH7734", diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c index 4b0db8259e3d..74620f30b19b 100644 --- a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c +++ b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c @@ -391,6 +391,7 @@ static struct platform_device *sh7786_early_devices[] __initdata = { &tmu0_device, &tmu1_device, &tmu2_device, + &tmu3_device, }; static struct platform_device *sh7786_devices[] __initdata = { diff --git a/arch/sh/kernel/cpu/sh5/Makefile b/arch/sh/kernel/cpu/sh5/Makefile deleted file mode 100644 index 97d23ec3005f..000000000000 --- a/arch/sh/kernel/cpu/sh5/Makefile +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for the Linux/SuperH SH-5 backends. -# -obj-y := entry.o probe.o switchto.o - -obj-$(CONFIG_SH_FPU) += fpu.o -obj-$(CONFIG_KALLSYMS) += unwind.o - -# CPU subtype setup -obj-$(CONFIG_CPU_SH5) += setup-sh5.o - -# Primary on-chip clocks (common) -clock-$(CONFIG_CPU_SH5) := clock-sh5.o - -obj-y += $(clock-y) diff --git a/arch/sh/kernel/cpu/sh5/clock-sh5.c b/arch/sh/kernel/cpu/sh5/clock-sh5.c deleted file mode 100644 index dee6be2c2344..000000000000 --- a/arch/sh/kernel/cpu/sh5/clock-sh5.c +++ /dev/null @@ -1,76 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/cpu/sh5/clock-sh5.c - * - * SH-5 support for the clock framework - * - * Copyright (C) 2008 Paul Mundt - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <asm/clock.h> -#include <asm/io.h> - -static int ifc_table[] = { 2, 4, 6, 8, 10, 12, 16, 24 }; - -/* Clock, Power and Reset Controller */ -#define CPRC_BLOCK_OFF 0x01010000 -#define CPRC_BASE (PHYS_PERIPHERAL_BLOCK + CPRC_BLOCK_OFF) - -static unsigned long cprc_base; - -static void master_clk_init(struct clk *clk) -{ - int idx = (__raw_readl(cprc_base + 0x00) >> 6) & 0x0007; - clk->rate *= ifc_table[idx]; -} - -static struct sh_clk_ops sh5_master_clk_ops = { - .init = master_clk_init, -}; - -static unsigned long module_clk_recalc(struct clk *clk) -{ - int idx = (__raw_readw(cprc_base) >> 12) & 0x0007; - return clk->parent->rate / ifc_table[idx]; -} - -static struct sh_clk_ops sh5_module_clk_ops = { - .recalc = module_clk_recalc, -}; - -static unsigned long bus_clk_recalc(struct clk *clk) -{ - int idx = (__raw_readw(cprc_base) >> 3) & 0x0007; - return clk->parent->rate / ifc_table[idx]; -} - -static struct sh_clk_ops sh5_bus_clk_ops = { - .recalc = bus_clk_recalc, -}; - -static unsigned long cpu_clk_recalc(struct clk *clk) -{ - int idx = (__raw_readw(cprc_base) & 0x0007); - return clk->parent->rate / ifc_table[idx]; -} - -static struct sh_clk_ops sh5_cpu_clk_ops = { - .recalc = cpu_clk_recalc, -}; - -static struct sh_clk_ops *sh5_clk_ops[] = { - &sh5_master_clk_ops, - &sh5_module_clk_ops, - &sh5_bus_clk_ops, - &sh5_cpu_clk_ops, -}; - -void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx) -{ - cprc_base = (unsigned long)ioremap(CPRC_BASE, 1024); - BUG_ON(!cprc_base); - - if (idx < ARRAY_SIZE(sh5_clk_ops)) - *ops = sh5_clk_ops[idx]; -} diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S deleted file mode 100644 index 81c8b64b977f..000000000000 --- a/arch/sh/kernel/cpu/sh5/entry.S +++ /dev/null @@ -1,2000 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 - * - * arch/sh/kernel/cpu/sh5/entry.S - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2004 - 2008 Paul Mundt - * Copyright (C) 2003, 2004 Richard Curnow - */ -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/sys.h> -#include <cpu/registers.h> -#include <asm/processor.h> -#include <asm/unistd.h> -#include <asm/thread_info.h> -#include <asm/asm-offsets.h> - -/* - * SR fields. - */ -#define SR_ASID_MASK 0x00ff0000 -#define SR_FD_MASK 0x00008000 -#define SR_SS 0x08000000 -#define SR_BL 0x10000000 -#define SR_MD 0x40000000 - -/* - * Event code. - */ -#define EVENT_INTERRUPT 0 -#define EVENT_FAULT_TLB 1 -#define EVENT_FAULT_NOT_TLB 2 -#define EVENT_DEBUG 3 - -/* EXPEVT values */ -#define RESET_CAUSE 0x20 -#define DEBUGSS_CAUSE 0x980 - -/* - * Frame layout. Quad index. - */ -#define FRAME_T(x) FRAME_TBASE+(x*8) -#define FRAME_R(x) FRAME_RBASE+(x*8) -#define FRAME_S(x) FRAME_SBASE+(x*8) -#define FSPC 0 -#define FSSR 1 -#define FSYSCALL_ID 2 - -/* Arrange the save frame to be a multiple of 32 bytes long */ -#define FRAME_SBASE 0 -#define FRAME_RBASE (FRAME_SBASE+(3*8)) /* SYSCALL_ID - SSR - SPC */ -#define FRAME_TBASE (FRAME_RBASE+(63*8)) /* r0 - r62 */ -#define FRAME_PBASE (FRAME_TBASE+(8*8)) /* tr0 -tr7 */ -#define FRAME_SIZE (FRAME_PBASE+(2*8)) /* pad0-pad1 */ - -#define FP_FRAME_SIZE FP_FRAME_BASE+(33*8) /* dr0 - dr31 + fpscr */ -#define FP_FRAME_BASE 0 - -#define SAVED_R2 0*8 -#define SAVED_R3 1*8 -#define SAVED_R4 2*8 -#define SAVED_R5 3*8 -#define SAVED_R18 4*8 -#define SAVED_R6 5*8 -#define SAVED_TR0 6*8 - -/* These are the registers saved in the TLB path that aren't saved in the first - level of the normal one. */ -#define TLB_SAVED_R25 7*8 -#define TLB_SAVED_TR1 8*8 -#define TLB_SAVED_TR2 9*8 -#define TLB_SAVED_TR3 10*8 -#define TLB_SAVED_TR4 11*8 -/* Save R0/R1 : PT-migrating compiler currently dishounours -ffixed-r0 and -ffixed-r1 causing - breakage otherwise. */ -#define TLB_SAVED_R0 12*8 -#define TLB_SAVED_R1 13*8 - -#define CLI() \ - getcon SR, r6; \ - ori r6, 0xf0, r6; \ - putcon r6, SR; - -#define STI() \ - getcon SR, r6; \ - andi r6, ~0xf0, r6; \ - putcon r6, SR; - -#ifdef CONFIG_PREEMPTION -# define preempt_stop() CLI() -#else -# define preempt_stop() -# define resume_kernel restore_all -#endif - - .section .data, "aw" - -#define FAST_TLBMISS_STACK_CACHELINES 4 -#define FAST_TLBMISS_STACK_QUADWORDS (4*FAST_TLBMISS_STACK_CACHELINES) - -/* Register back-up area for all exceptions */ - .balign 32 - /* Allow for 16 quadwords to be pushed by fast tlbmiss handling - * register saves etc. */ - .fill FAST_TLBMISS_STACK_QUADWORDS, 8, 0x0 -/* This is 32 byte aligned by construction */ -/* Register back-up area for all exceptions */ -reg_save_area: - .quad 0 - .quad 0 - .quad 0 - .quad 0 - - .quad 0 - .quad 0 - .quad 0 - .quad 0 - - .quad 0 - .quad 0 - .quad 0 - .quad 0 - - .quad 0 - .quad 0 - -/* Save area for RESVEC exceptions. We cannot use reg_save_area because of - * reentrancy. Note this area may be accessed via physical address. - * Align so this fits a whole single cache line, for ease of purging. - */ - .balign 32,0,32 -resvec_save_area: - .quad 0 - .quad 0 - .quad 0 - .quad 0 - .quad 0 - .balign 32,0,32 - -/* Jump table of 3rd level handlers */ -trap_jtable: - .long do_exception_error /* 0x000 */ - .long do_exception_error /* 0x020 */ -#ifdef CONFIG_MMU - .long tlb_miss_load /* 0x040 */ - .long tlb_miss_store /* 0x060 */ -#else - .long do_exception_error - .long do_exception_error -#endif - ! ARTIFICIAL pseudo-EXPEVT setting - .long do_debug_interrupt /* 0x080 */ -#ifdef CONFIG_MMU - .long tlb_miss_load /* 0x0A0 */ - .long tlb_miss_store /* 0x0C0 */ -#else - .long do_exception_error - .long do_exception_error -#endif - .long do_address_error_load /* 0x0E0 */ - .long do_address_error_store /* 0x100 */ -#ifdef CONFIG_SH_FPU - .long do_fpu_error /* 0x120 */ -#else - .long do_exception_error /* 0x120 */ -#endif - .long do_exception_error /* 0x140 */ - .long system_call /* 0x160 */ - .long do_reserved_inst /* 0x180 */ - .long do_illegal_slot_inst /* 0x1A0 */ - .long do_exception_error /* 0x1C0 - NMI */ - .long do_exception_error /* 0x1E0 */ - .rept 15 - .long do_IRQ /* 0x200 - 0x3C0 */ - .endr - .long do_exception_error /* 0x3E0 */ - .rept 32 - .long do_IRQ /* 0x400 - 0x7E0 */ - .endr - .long fpu_error_or_IRQA /* 0x800 */ - .long fpu_error_or_IRQB /* 0x820 */ - .long do_IRQ /* 0x840 */ - .long do_IRQ /* 0x860 */ - .rept 6 - .long do_exception_error /* 0x880 - 0x920 */ - .endr - .long breakpoint_trap_handler /* 0x940 */ - .long do_exception_error /* 0x960 */ - .long do_single_step /* 0x980 */ - - .rept 3 - .long do_exception_error /* 0x9A0 - 0x9E0 */ - .endr - .long do_IRQ /* 0xA00 */ - .long do_IRQ /* 0xA20 */ -#ifdef CONFIG_MMU - .long itlb_miss_or_IRQ /* 0xA40 */ -#else - .long do_IRQ -#endif - .long do_IRQ /* 0xA60 */ - .long do_IRQ /* 0xA80 */ -#ifdef CONFIG_MMU - .long itlb_miss_or_IRQ /* 0xAA0 */ -#else - .long do_IRQ -#endif - .long do_exception_error /* 0xAC0 */ - .long do_address_error_exec /* 0xAE0 */ - .rept 8 - .long do_exception_error /* 0xB00 - 0xBE0 */ - .endr - .rept 18 - .long do_IRQ /* 0xC00 - 0xE20 */ - .endr - - .section .text64, "ax" - -/* - * --- Exception/Interrupt/Event Handling Section - */ - -/* - * VBR and RESVEC blocks. - * - * First level handler for VBR-based exceptions. - * - * To avoid waste of space, align to the maximum text block size. - * This is assumed to be at most 128 bytes or 32 instructions. - * DO NOT EXCEED 32 instructions on the first level handlers ! - * - * Also note that RESVEC is contained within the VBR block - * where the room left (1KB - TEXT_SIZE) allows placing - * the RESVEC block (at most 512B + TEXT_SIZE). - * - * So first (and only) level handler for RESVEC-based exceptions. - * - * Where the fault/interrupt is handled (not_a_tlb_miss, tlb_miss - * and interrupt) we are a lot tight with register space until - * saving onto the stack frame, which is done in handle_exception(). - * - */ - -#define TEXT_SIZE 128 -#define BLOCK_SIZE 1664 /* Dynamic check, 13*128 */ - - .balign TEXT_SIZE -LVBR_block: - .space 256, 0 /* Power-on class handler, */ - /* not required here */ -not_a_tlb_miss: - synco /* TAKum03020 (but probably a good idea anyway.) */ - /* Save original stack pointer into KCR1 */ - putcon SP, KCR1 - - /* Save other original registers into reg_save_area */ - movi reg_save_area, SP - st.q SP, SAVED_R2, r2 - st.q SP, SAVED_R3, r3 - st.q SP, SAVED_R4, r4 - st.q SP, SAVED_R5, r5 - st.q SP, SAVED_R6, r6 - st.q SP, SAVED_R18, r18 - gettr tr0, r3 - st.q SP, SAVED_TR0, r3 - - /* Set args for Non-debug, Not a TLB miss class handler */ - getcon EXPEVT, r2 - movi ret_from_exception, r3 - ori r3, 1, r3 - movi EVENT_FAULT_NOT_TLB, r4 - or SP, ZERO, r5 - getcon KCR1, SP - pta handle_exception, tr0 - blink tr0, ZERO - - .balign 256 - ! VBR+0x200 - nop - .balign 256 - ! VBR+0x300 - nop - .balign 256 - /* - * Instead of the natural .balign 1024 place RESVEC here - * respecting the final 1KB alignment. - */ - .balign TEXT_SIZE - /* - * Instead of '.space 1024-TEXT_SIZE' place the RESVEC - * block making sure the final alignment is correct. - */ -#ifdef CONFIG_MMU -tlb_miss: - synco /* TAKum03020 (but probably a good idea anyway.) */ - putcon SP, KCR1 - movi reg_save_area, SP - /* SP is guaranteed 32-byte aligned. */ - st.q SP, TLB_SAVED_R0 , r0 - st.q SP, TLB_SAVED_R1 , r1 - st.q SP, SAVED_R2 , r2 - st.q SP, SAVED_R3 , r3 - st.q SP, SAVED_R4 , r4 - st.q SP, SAVED_R5 , r5 - st.q SP, SAVED_R6 , r6 - st.q SP, SAVED_R18, r18 - - /* Save R25 for safety; as/ld may want to use it to achieve the call to - * the code in mm/tlbmiss.c */ - st.q SP, TLB_SAVED_R25, r25 - gettr tr0, r2 - gettr tr1, r3 - gettr tr2, r4 - gettr tr3, r5 - gettr tr4, r18 - st.q SP, SAVED_TR0 , r2 - st.q SP, TLB_SAVED_TR1 , r3 - st.q SP, TLB_SAVED_TR2 , r4 - st.q SP, TLB_SAVED_TR3 , r5 - st.q SP, TLB_SAVED_TR4 , r18 - - pt do_fast_page_fault, tr0 - getcon SSR, r2 - getcon EXPEVT, r3 - getcon TEA, r4 - shlri r2, 30, r2 - andi r2, 1, r2 /* r2 = SSR.MD */ - blink tr0, LINK - - pt fixup_to_invoke_general_handler, tr1 - - /* If the fast path handler fixed the fault, just drop through quickly - to the restore code right away to return to the excepting context. - */ - bnei/u r2, 0, tr1 - -fast_tlb_miss_restore: - ld.q SP, SAVED_TR0, r2 - ld.q SP, TLB_SAVED_TR1, r3 - ld.q SP, TLB_SAVED_TR2, r4 - - ld.q SP, TLB_SAVED_TR3, r5 - ld.q SP, TLB_SAVED_TR4, r18 - - ptabs r2, tr0 - ptabs r3, tr1 - ptabs r4, tr2 - ptabs r5, tr3 - ptabs r18, tr4 - - ld.q SP, TLB_SAVED_R0, r0 - ld.q SP, TLB_SAVED_R1, r1 - ld.q SP, SAVED_R2, r2 - ld.q SP, SAVED_R3, r3 - ld.q SP, SAVED_R4, r4 - ld.q SP, SAVED_R5, r5 - ld.q SP, SAVED_R6, r6 - ld.q SP, SAVED_R18, r18 - ld.q SP, TLB_SAVED_R25, r25 - - getcon KCR1, SP - rte - nop /* for safety, in case the code is run on sh5-101 cut1.x */ - -fixup_to_invoke_general_handler: - - /* OK, new method. Restore stuff that's not expected to get saved into - the 'first-level' reg save area, then just fall through to setting - up the registers and calling the second-level handler. */ - - /* 2nd level expects r2,3,4,5,6,18,tr0 to be saved. So we must restore - r25,tr1-4 and save r6 to get into the right state. */ - - ld.q SP, TLB_SAVED_TR1, r3 - ld.q SP, TLB_SAVED_TR2, r4 - ld.q SP, TLB_SAVED_TR3, r5 - ld.q SP, TLB_SAVED_TR4, r18 - ld.q SP, TLB_SAVED_R25, r25 - - ld.q SP, TLB_SAVED_R0, r0 - ld.q SP, TLB_SAVED_R1, r1 - - ptabs/u r3, tr1 - ptabs/u r4, tr2 - ptabs/u r5, tr3 - ptabs/u r18, tr4 - - /* Set args for Non-debug, TLB miss class handler */ - getcon EXPEVT, r2 - movi ret_from_exception, r3 - ori r3, 1, r3 - movi EVENT_FAULT_TLB, r4 - or SP, ZERO, r5 - getcon KCR1, SP - pta handle_exception, tr0 - blink tr0, ZERO -#else /* CONFIG_MMU */ - .balign 256 -#endif - -/* NB TAKE GREAT CARE HERE TO ENSURE THAT THE INTERRUPT CODE - DOES END UP AT VBR+0x600 */ - nop - nop - nop - nop - nop - nop - - .balign 256 - /* VBR + 0x600 */ - -interrupt: - synco /* TAKum03020 (but probably a good idea anyway.) */ - /* Save original stack pointer into KCR1 */ - putcon SP, KCR1 - - /* Save other original registers into reg_save_area */ - movi reg_save_area, SP - st.q SP, SAVED_R2, r2 - st.q SP, SAVED_R3, r3 - st.q SP, SAVED_R4, r4 - st.q SP, SAVED_R5, r5 - st.q SP, SAVED_R6, r6 - st.q SP, SAVED_R18, r18 - gettr tr0, r3 - st.q SP, SAVED_TR0, r3 - - /* Set args for interrupt class handler */ - getcon INTEVT, r2 - movi ret_from_irq, r3 - ori r3, 1, r3 - movi EVENT_INTERRUPT, r4 - or SP, ZERO, r5 - getcon KCR1, SP - pta handle_exception, tr0 - blink tr0, ZERO - .balign TEXT_SIZE /* let's waste the bare minimum */ - -LVBR_block_end: /* Marker. Used for total checking */ - - .balign 256 -LRESVEC_block: - /* Panic handler. Called with MMU off. Possible causes/actions: - * - Reset: Jump to program start. - * - Single Step: Turn off Single Step & return. - * - Others: Call panic handler, passing PC as arg. - * (this may need to be extended...) - */ -reset_or_panic: - synco /* TAKum03020 (but probably a good idea anyway.) */ - putcon SP, DCR - /* First save r0-1 and tr0, as we need to use these */ - movi resvec_save_area-CONFIG_PAGE_OFFSET, SP - st.q SP, 0, r0 - st.q SP, 8, r1 - gettr tr0, r0 - st.q SP, 32, r0 - - /* Check cause */ - getcon EXPEVT, r0 - movi RESET_CAUSE, r1 - sub r1, r0, r1 /* r1=0 if reset */ - movi _stext-CONFIG_PAGE_OFFSET, r0 - ori r0, 1, r0 - ptabs r0, tr0 - beqi r1, 0, tr0 /* Jump to start address if reset */ - - getcon EXPEVT, r0 - movi DEBUGSS_CAUSE, r1 - sub r1, r0, r1 /* r1=0 if single step */ - pta single_step_panic, tr0 - beqi r1, 0, tr0 /* jump if single step */ - - /* Now jump to where we save the registers. */ - movi panic_stash_regs-CONFIG_PAGE_OFFSET, r1 - ptabs r1, tr0 - blink tr0, r63 - -single_step_panic: - /* We are in a handler with Single Step set. We need to resume the - * handler, by turning on MMU & turning off Single Step. */ - getcon SSR, r0 - movi SR_MMU, r1 - or r0, r1, r0 - movi ~SR_SS, r1 - and r0, r1, r0 - putcon r0, SSR - /* Restore EXPEVT, as the rte won't do this */ - getcon PEXPEVT, r0 - putcon r0, EXPEVT - /* Restore regs */ - ld.q SP, 32, r0 - ptabs r0, tr0 - ld.q SP, 0, r0 - ld.q SP, 8, r1 - getcon DCR, SP - synco - rte - - - .balign 256 -debug_exception: - synco /* TAKum03020 (but probably a good idea anyway.) */ - /* - * Single step/software_break_point first level handler. - * Called with MMU off, so the first thing we do is enable it - * by doing an rte with appropriate SSR. - */ - putcon SP, DCR - /* Save SSR & SPC, together with R0 & R1, as we need to use 2 regs. */ - movi resvec_save_area-CONFIG_PAGE_OFFSET, SP - - /* With the MMU off, we are bypassing the cache, so purge any - * data that will be made stale by the following stores. - */ - ocbp SP, 0 - synco - - st.q SP, 0, r0 - st.q SP, 8, r1 - getcon SPC, r0 - st.q SP, 16, r0 - getcon SSR, r0 - st.q SP, 24, r0 - - /* Enable MMU, block exceptions, set priv mode, disable single step */ - movi SR_MMU | SR_BL | SR_MD, r1 - or r0, r1, r0 - movi ~SR_SS, r1 - and r0, r1, r0 - putcon r0, SSR - /* Force control to debug_exception_2 when rte is executed */ - movi debug_exeception_2, r0 - ori r0, 1, r0 /* force SHmedia, just in case */ - putcon r0, SPC - getcon DCR, SP - synco - rte -debug_exeception_2: - /* Restore saved regs */ - putcon SP, KCR1 - movi resvec_save_area, SP - ld.q SP, 24, r0 - putcon r0, SSR - ld.q SP, 16, r0 - putcon r0, SPC - ld.q SP, 0, r0 - ld.q SP, 8, r1 - - /* Save other original registers into reg_save_area */ - movi reg_save_area, SP - st.q SP, SAVED_R2, r2 - st.q SP, SAVED_R3, r3 - st.q SP, SAVED_R4, r4 - st.q SP, SAVED_R5, r5 - st.q SP, SAVED_R6, r6 - st.q SP, SAVED_R18, r18 - gettr tr0, r3 - st.q SP, SAVED_TR0, r3 - - /* Set args for debug class handler */ - getcon EXPEVT, r2 - movi ret_from_exception, r3 - ori r3, 1, r3 - movi EVENT_DEBUG, r4 - or SP, ZERO, r5 - getcon KCR1, SP - pta handle_exception, tr0 - blink tr0, ZERO - - .balign 256 -debug_interrupt: - /* !!! WE COME HERE IN REAL MODE !!! */ - /* Hook-up debug interrupt to allow various debugging options to be - * hooked into its handler. */ - /* Save original stack pointer into KCR1 */ - synco - putcon SP, KCR1 - movi resvec_save_area-CONFIG_PAGE_OFFSET, SP - ocbp SP, 0 - ocbp SP, 32 - synco - - /* Save other original registers into reg_save_area thru real addresses */ - st.q SP, SAVED_R2, r2 - st.q SP, SAVED_R3, r3 - st.q SP, SAVED_R4, r4 - st.q SP, SAVED_R5, r5 - st.q SP, SAVED_R6, r6 - st.q SP, SAVED_R18, r18 - gettr tr0, r3 - st.q SP, SAVED_TR0, r3 - - /* move (spc,ssr)->(pspc,pssr). The rte will shift - them back again, so that they look like the originals - as far as the real handler code is concerned. */ - getcon spc, r6 - putcon r6, pspc - getcon ssr, r6 - putcon r6, pssr - - ! construct useful SR for handle_exception - movi 3, r6 - shlli r6, 30, r6 - getcon sr, r18 - or r18, r6, r6 - putcon r6, ssr - - ! SSR is now the current SR with the MD and MMU bits set - ! i.e. the rte will switch back to priv mode and put - ! the mmu back on - - ! construct spc - movi handle_exception, r18 - ori r18, 1, r18 ! for safety (do we need this?) - putcon r18, spc - - /* Set args for Non-debug, Not a TLB miss class handler */ - - ! EXPEVT==0x80 is unused, so 'steal' this value to put the - ! debug interrupt handler in the vectoring table - movi 0x80, r2 - movi ret_from_exception, r3 - ori r3, 1, r3 - movi EVENT_FAULT_NOT_TLB, r4 - - or SP, ZERO, r5 - movi CONFIG_PAGE_OFFSET, r6 - add r6, r5, r5 - getcon KCR1, SP - - synco ! for safety - rte ! -> handle_exception, switch back to priv mode again - -LRESVEC_block_end: /* Marker. Unused. */ - - .balign TEXT_SIZE - -/* - * Second level handler for VBR-based exceptions. Pre-handler. - * In common to all stack-frame sensitive handlers. - * - * Inputs: - * (KCR0) Current [current task union] - * (KCR1) Original SP - * (r2) INTEVT/EXPEVT - * (r3) appropriate return address - * (r4) Event (0 = interrupt, 1 = TLB miss fault, 2 = Not TLB miss fault, 3=debug) - * (r5) Pointer to reg_save_area - * (SP) Original SP - * - * Available registers: - * (r6) - * (r18) - * (tr0) - * - */ -handle_exception: - /* Common 2nd level handler. */ - - /* First thing we need an appropriate stack pointer */ - getcon SSR, r6 - shlri r6, 30, r6 - andi r6, 1, r6 - pta stack_ok, tr0 - bne r6, ZERO, tr0 /* Original stack pointer is fine */ - - /* Set stack pointer for user fault */ - getcon KCR0, SP - movi THREAD_SIZE, r6 /* Point to the end */ - add SP, r6, SP - -stack_ok: - -/* DEBUG : check for underflow/overflow of the kernel stack */ - pta no_underflow, tr0 - getcon KCR0, r6 - movi 1024, r18 - add r6, r18, r6 - bge SP, r6, tr0 ! ? below 1k from bottom of stack : danger zone - -/* Just panic to cause a crash. */ -bad_sp: - ld.b r63, 0, r6 - nop - -no_underflow: - pta bad_sp, tr0 - getcon kcr0, r6 - movi THREAD_SIZE, r18 - add r18, r6, r6 - bgt SP, r6, tr0 ! sp above the stack - - /* Make some room for the BASIC frame. */ - movi -(FRAME_SIZE), r6 - add SP, r6, SP - -/* Could do this with no stalling if we had another spare register, but the - code below will be OK. */ - ld.q r5, SAVED_R2, r6 - ld.q r5, SAVED_R3, r18 - st.q SP, FRAME_R(2), r6 - ld.q r5, SAVED_R4, r6 - st.q SP, FRAME_R(3), r18 - ld.q r5, SAVED_R5, r18 - st.q SP, FRAME_R(4), r6 - ld.q r5, SAVED_R6, r6 - st.q SP, FRAME_R(5), r18 - ld.q r5, SAVED_R18, r18 - st.q SP, FRAME_R(6), r6 - ld.q r5, SAVED_TR0, r6 - st.q SP, FRAME_R(18), r18 - st.q SP, FRAME_T(0), r6 - - /* Keep old SP around */ - getcon KCR1, r6 - - /* Save the rest of the general purpose registers */ - st.q SP, FRAME_R(0), r0 - st.q SP, FRAME_R(1), r1 - st.q SP, FRAME_R(7), r7 - st.q SP, FRAME_R(8), r8 - st.q SP, FRAME_R(9), r9 - st.q SP, FRAME_R(10), r10 - st.q SP, FRAME_R(11), r11 - st.q SP, FRAME_R(12), r12 - st.q SP, FRAME_R(13), r13 - st.q SP, FRAME_R(14), r14 - - /* SP is somewhere else */ - st.q SP, FRAME_R(15), r6 - - st.q SP, FRAME_R(16), r16 - st.q SP, FRAME_R(17), r17 - /* r18 is saved earlier. */ - st.q SP, FRAME_R(19), r19 - st.q SP, FRAME_R(20), r20 - st.q SP, FRAME_R(21), r21 - st.q SP, FRAME_R(22), r22 - st.q SP, FRAME_R(23), r23 - st.q SP, FRAME_R(24), r24 - st.q SP, FRAME_R(25), r25 - st.q SP, FRAME_R(26), r26 - st.q SP, FRAME_R(27), r27 - st.q SP, FRAME_R(28), r28 - st.q SP, FRAME_R(29), r29 - st.q SP, FRAME_R(30), r30 - st.q SP, FRAME_R(31), r31 - st.q SP, FRAME_R(32), r32 - st.q SP, FRAME_R(33), r33 - st.q SP, FRAME_R(34), r34 - st.q SP, FRAME_R(35), r35 - st.q SP, FRAME_R(36), r36 - st.q SP, FRAME_R(37), r37 - st.q SP, FRAME_R(38), r38 - st.q SP, FRAME_R(39), r39 - st.q SP, FRAME_R(40), r40 - st.q SP, FRAME_R(41), r41 - st.q SP, FRAME_R(42), r42 - st.q SP, FRAME_R(43), r43 - st.q SP, FRAME_R(44), r44 - st.q SP, FRAME_R(45), r45 - st.q SP, FRAME_R(46), r46 - st.q SP, FRAME_R(47), r47 - st.q SP, FRAME_R(48), r48 - st.q SP, FRAME_R(49), r49 - st.q SP, FRAME_R(50), r50 - st.q SP, FRAME_R(51), r51 - st.q SP, FRAME_R(52), r52 - st.q SP, FRAME_R(53), r53 - st.q SP, FRAME_R(54), r54 - st.q SP, FRAME_R(55), r55 - st.q SP, FRAME_R(56), r56 - st.q SP, FRAME_R(57), r57 - st.q SP, FRAME_R(58), r58 - st.q SP, FRAME_R(59), r59 - st.q SP, FRAME_R(60), r60 - st.q SP, FRAME_R(61), r61 - st.q SP, FRAME_R(62), r62 - - /* - * Save the S* registers. - */ - getcon SSR, r61 - st.q SP, FRAME_S(FSSR), r61 - getcon SPC, r62 - st.q SP, FRAME_S(FSPC), r62 - movi -1, r62 /* Reset syscall_nr */ - st.q SP, FRAME_S(FSYSCALL_ID), r62 - - /* Save the rest of the target registers */ - gettr tr1, r6 - st.q SP, FRAME_T(1), r6 - gettr tr2, r6 - st.q SP, FRAME_T(2), r6 - gettr tr3, r6 - st.q SP, FRAME_T(3), r6 - gettr tr4, r6 - st.q SP, FRAME_T(4), r6 - gettr tr5, r6 - st.q SP, FRAME_T(5), r6 - gettr tr6, r6 - st.q SP, FRAME_T(6), r6 - gettr tr7, r6 - st.q SP, FRAME_T(7), r6 - - ! setup FP so that unwinder can wind back through nested kernel mode - ! exceptions - add SP, ZERO, r14 - - /* For syscall and debug race condition, get TRA now */ - getcon TRA, r5 - - /* We are in a safe position to turn SR.BL off, but set IMASK=0xf - * Also set FD, to catch FPU usage in the kernel. - * - * benedict.gaster@superh.com 29/07/2002 - * - * On all SH5-101 revisions it is unsafe to raise the IMASK and at the - * same time change BL from 1->0, as any pending interrupt of a level - * higher than he previous value of IMASK will leak through and be - * taken unexpectedly. - * - * To avoid this we raise the IMASK and then issue another PUTCON to - * enable interrupts. - */ - getcon SR, r6 - movi SR_IMASK | SR_FD, r7 - or r6, r7, r6 - putcon r6, SR - movi SR_UNBLOCK_EXC, r7 - and r6, r7, r6 - putcon r6, SR - - - /* Now call the appropriate 3rd level handler */ - or r3, ZERO, LINK - movi trap_jtable, r3 - shlri r2, 3, r2 - ldx.l r2, r3, r3 - shlri r2, 2, r2 - ptabs r3, tr0 - or SP, ZERO, r3 - blink tr0, ZERO - -/* - * Second level handler for VBR-based exceptions. Post-handlers. - * - * Post-handlers for interrupts (ret_from_irq), exceptions - * (ret_from_exception) and common reentrance doors (restore_all - * to get back to the original context, ret_from_syscall loop to - * check kernel exiting). - * - * ret_with_reschedule and work_notifysig are an inner lables of - * the ret_from_syscall loop. - * - * In common to all stack-frame sensitive handlers. - * - * Inputs: - * (SP) struct pt_regs *, original register's frame pointer (basic) - * - */ - .global ret_from_irq -ret_from_irq: - ld.q SP, FRAME_S(FSSR), r6 - shlri r6, 30, r6 - andi r6, 1, r6 - pta resume_kernel, tr0 - bne r6, ZERO, tr0 /* no further checks */ - STI() - pta ret_with_reschedule, tr0 - blink tr0, ZERO /* Do not check softirqs */ - - .global ret_from_exception -ret_from_exception: - preempt_stop() - - ld.q SP, FRAME_S(FSSR), r6 - shlri r6, 30, r6 - andi r6, 1, r6 - pta resume_kernel, tr0 - bne r6, ZERO, tr0 /* no further checks */ - - /* Check softirqs */ - -#ifdef CONFIG_PREEMPTION - pta ret_from_syscall, tr0 - blink tr0, ZERO - -resume_kernel: - CLI() - - pta restore_all, tr0 - - getcon KCR0, r6 - ld.l r6, TI_PRE_COUNT, r7 - beq/u r7, ZERO, tr0 - -need_resched: - ld.l r6, TI_FLAGS, r7 - movi (1 << TIF_NEED_RESCHED), r8 - and r8, r7, r8 - bne r8, ZERO, tr0 - - getcon SR, r7 - andi r7, 0xf0, r7 - bne r7, ZERO, tr0 - - movi preempt_schedule_irq, r7 - ori r7, 1, r7 - ptabs r7, tr1 - blink tr1, LINK - - pta need_resched, tr1 - blink tr1, ZERO -#endif - - .global ret_from_syscall -ret_from_syscall: - -ret_with_reschedule: - getcon KCR0, r6 ! r6 contains current_thread_info - ld.l r6, TI_FLAGS, r7 ! r7 contains current_thread_info->flags - - movi _TIF_NEED_RESCHED, r8 - and r8, r7, r8 - pta work_resched, tr0 - bne r8, ZERO, tr0 - - pta restore_all, tr1 - - movi (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME), r8 - and r8, r7, r8 - pta work_notifysig, tr0 - bne r8, ZERO, tr0 - - blink tr1, ZERO - -work_resched: - pta ret_from_syscall, tr0 - gettr tr0, LINK - movi schedule, r6 - ptabs r6, tr0 - blink tr0, ZERO /* Call schedule(), return on top */ - -work_notifysig: - gettr tr1, LINK - - movi do_notify_resume, r6 - ptabs r6, tr0 - or SP, ZERO, r2 - or r7, ZERO, r3 - blink tr0, LINK /* Call do_notify_resume(regs, current_thread_info->flags), return here */ - -restore_all: - /* Do prefetches */ - - ld.q SP, FRAME_T(0), r6 - ld.q SP, FRAME_T(1), r7 - ld.q SP, FRAME_T(2), r8 - ld.q SP, FRAME_T(3), r9 - ptabs r6, tr0 - ptabs r7, tr1 - ptabs r8, tr2 - ptabs r9, tr3 - ld.q SP, FRAME_T(4), r6 - ld.q SP, FRAME_T(5), r7 - ld.q SP, FRAME_T(6), r8 - ld.q SP, FRAME_T(7), r9 - ptabs r6, tr4 - ptabs r7, tr5 - ptabs r8, tr6 - ptabs r9, tr7 - - ld.q SP, FRAME_R(0), r0 - ld.q SP, FRAME_R(1), r1 - ld.q SP, FRAME_R(2), r2 - ld.q SP, FRAME_R(3), r3 - ld.q SP, FRAME_R(4), r4 - ld.q SP, FRAME_R(5), r5 - ld.q SP, FRAME_R(6), r6 - ld.q SP, FRAME_R(7), r7 - ld.q SP, FRAME_R(8), r8 - ld.q SP, FRAME_R(9), r9 - ld.q SP, FRAME_R(10), r10 - ld.q SP, FRAME_R(11), r11 - ld.q SP, FRAME_R(12), r12 - ld.q SP, FRAME_R(13), r13 - ld.q SP, FRAME_R(14), r14 - - ld.q SP, FRAME_R(16), r16 - ld.q SP, FRAME_R(17), r17 - ld.q SP, FRAME_R(18), r18 - ld.q SP, FRAME_R(19), r19 - ld.q SP, FRAME_R(20), r20 - ld.q SP, FRAME_R(21), r21 - ld.q SP, FRAME_R(22), r22 - ld.q SP, FRAME_R(23), r23 - ld.q SP, FRAME_R(24), r24 - ld.q SP, FRAME_R(25), r25 - ld.q SP, FRAME_R(26), r26 - ld.q SP, FRAME_R(27), r27 - ld.q SP, FRAME_R(28), r28 - ld.q SP, FRAME_R(29), r29 - ld.q SP, FRAME_R(30), r30 - ld.q SP, FRAME_R(31), r31 - ld.q SP, FRAME_R(32), r32 - ld.q SP, FRAME_R(33), r33 - ld.q SP, FRAME_R(34), r34 - ld.q SP, FRAME_R(35), r35 - ld.q SP, FRAME_R(36), r36 - ld.q SP, FRAME_R(37), r37 - ld.q SP, FRAME_R(38), r38 - ld.q SP, FRAME_R(39), r39 - ld.q SP, FRAME_R(40), r40 - ld.q SP, FRAME_R(41), r41 - ld.q SP, FRAME_R(42), r42 - ld.q SP, FRAME_R(43), r43 - ld.q SP, FRAME_R(44), r44 - ld.q SP, FRAME_R(45), r45 - ld.q SP, FRAME_R(46), r46 - ld.q SP, FRAME_R(47), r47 - ld.q SP, FRAME_R(48), r48 - ld.q SP, FRAME_R(49), r49 - ld.q SP, FRAME_R(50), r50 - ld.q SP, FRAME_R(51), r51 - ld.q SP, FRAME_R(52), r52 - ld.q SP, FRAME_R(53), r53 - ld.q SP, FRAME_R(54), r54 - ld.q SP, FRAME_R(55), r55 - ld.q SP, FRAME_R(56), r56 - ld.q SP, FRAME_R(57), r57 - ld.q SP, FRAME_R(58), r58 - - getcon SR, r59 - movi SR_BLOCK_EXC, r60 - or r59, r60, r59 - putcon r59, SR /* SR.BL = 1, keep nesting out */ - ld.q SP, FRAME_S(FSSR), r61 - ld.q SP, FRAME_S(FSPC), r62 - movi SR_ASID_MASK, r60 - and r59, r60, r59 - andc r61, r60, r61 /* Clear out older ASID */ - or r59, r61, r61 /* Retain current ASID */ - putcon r61, SSR - putcon r62, SPC - - /* Ignore FSYSCALL_ID */ - - ld.q SP, FRAME_R(59), r59 - ld.q SP, FRAME_R(60), r60 - ld.q SP, FRAME_R(61), r61 - ld.q SP, FRAME_R(62), r62 - - /* Last touch */ - ld.q SP, FRAME_R(15), SP - rte - nop - -/* - * Third level handlers for VBR-based exceptions. Adapting args to - * and/or deflecting to fourth level handlers. - * - * Fourth level handlers interface. - * Most are C-coded handlers directly pointed by the trap_jtable. - * (Third = Fourth level) - * Inputs: - * (r2) fault/interrupt code, entry number (e.g. NMI = 14, - * IRL0-3 (0000) = 16, RTLBMISS = 2, SYSCALL = 11, etc ...) - * (r3) struct pt_regs *, original register's frame pointer - * (r4) Event (0 = interrupt, 1 = TLB miss fault, 2 = Not TLB miss fault) - * (r5) TRA control register (for syscall/debug benefit only) - * (LINK) return address - * (SP) = r3 - * - * Kernel TLB fault handlers will get a slightly different interface. - * (r2) struct pt_regs *, original register's frame pointer - * (r3) page fault error code (see asm/thread_info.h) - * (r4) Effective Address of fault - * (LINK) return address - * (SP) = r2 - * - * fpu_error_or_IRQ? is a helper to deflect to the right cause. - * - */ -#ifdef CONFIG_MMU -tlb_miss_load: - or SP, ZERO, r2 - or ZERO, ZERO, r3 /* Read */ - getcon TEA, r4 - pta call_do_page_fault, tr0 - beq ZERO, ZERO, tr0 - -tlb_miss_store: - or SP, ZERO, r2 - movi FAULT_CODE_WRITE, r3 /* Write */ - getcon TEA, r4 - pta call_do_page_fault, tr0 - beq ZERO, ZERO, tr0 - -itlb_miss_or_IRQ: - pta its_IRQ, tr0 - beqi/u r4, EVENT_INTERRUPT, tr0 - - /* ITLB miss */ - or SP, ZERO, r2 - movi FAULT_CODE_ITLB, r3 - getcon TEA, r4 - /* Fall through */ - -call_do_page_fault: - movi do_page_fault, r6 - ptabs r6, tr0 - blink tr0, ZERO -#endif /* CONFIG_MMU */ - -fpu_error_or_IRQA: - pta its_IRQ, tr0 - beqi/l r4, EVENT_INTERRUPT, tr0 -#ifdef CONFIG_SH_FPU - movi fpu_state_restore_trap_handler, r6 -#else - movi do_exception_error, r6 -#endif - ptabs r6, tr0 - blink tr0, ZERO - -fpu_error_or_IRQB: - pta its_IRQ, tr0 - beqi/l r4, EVENT_INTERRUPT, tr0 -#ifdef CONFIG_SH_FPU - movi fpu_state_restore_trap_handler, r6 -#else - movi do_exception_error, r6 -#endif - ptabs r6, tr0 - blink tr0, ZERO - -its_IRQ: - movi do_IRQ, r6 - ptabs r6, tr0 - blink tr0, ZERO - -/* - * system_call/unknown_trap third level handler: - * - * Inputs: - * (r2) fault/interrupt code, entry number (TRAP = 11) - * (r3) struct pt_regs *, original register's frame pointer - * (r4) Not used. Event (0=interrupt, 1=TLB miss fault, 2=Not TLB miss fault) - * (r5) TRA Control Reg (0x00xyzzzz: x=1 SYSCALL, y = #args, z=nr) - * (SP) = r3 - * (LINK) return address: ret_from_exception - * (*r3) Syscall parms: SC#, arg0, arg1, ..., arg5 in order (Saved r2/r7) - * - * Outputs: - * (*r3) Syscall reply (Saved r2) - * (LINK) In case of syscall only it can be scrapped. - * Common second level post handler will be ret_from_syscall. - * Common (non-trace) exit point to that is syscall_ret (saving - * result to r2). Common bad exit point is syscall_bad (returning - * ENOSYS then saved to r2). - * - */ - -unknown_trap: - /* Unknown Trap or User Trace */ - movi do_unknown_trapa, r6 - ptabs r6, tr0 - ld.q r3, FRAME_R(9), r2 /* r2 = #arg << 16 | syscall # */ - andi r2, 0x1ff, r2 /* r2 = syscall # */ - blink tr0, LINK - - pta syscall_ret, tr0 - blink tr0, ZERO - - /* New syscall implementation*/ -system_call: - pta unknown_trap, tr0 - or r5, ZERO, r4 /* TRA (=r5) -> r4 */ - shlri r4, 20, r4 - bnei r4, 1, tr0 /* unknown_trap if not 0x1yzzzz */ - - /* It's a system call */ - st.q r3, FRAME_S(FSYSCALL_ID), r5 /* ID (0x1yzzzz) -> stack */ - andi r5, 0x1ff, r5 /* syscall # -> r5 */ - - STI() - - pta syscall_allowed, tr0 - movi NR_syscalls - 1, r4 /* Last valid */ - bgeu/l r4, r5, tr0 - -syscall_bad: - /* Return ENOSYS ! */ - movi -(ENOSYS), r2 /* Fall-through */ - - .global syscall_ret -syscall_ret: - st.q SP, FRAME_R(9), r2 /* Expecting SP back to BASIC frame */ - ld.q SP, FRAME_S(FSPC), r2 - addi r2, 4, r2 /* Move PC, being pre-execution event */ - st.q SP, FRAME_S(FSPC), r2 - pta ret_from_syscall, tr0 - blink tr0, ZERO - - -/* A different return path for ret_from_fork, because we now need - * to call schedule_tail with the later kernels. Because prev is - * loaded into r2 by switch_to() means we can just call it straight away - */ - -.global ret_from_fork -ret_from_fork: - - movi schedule_tail,r5 - ori r5, 1, r5 - ptabs r5, tr0 - blink tr0, LINK - - ld.q SP, FRAME_S(FSPC), r2 - addi r2, 4, r2 /* Move PC, being pre-execution event */ - st.q SP, FRAME_S(FSPC), r2 - pta ret_from_syscall, tr0 - blink tr0, ZERO - -.global ret_from_kernel_thread -ret_from_kernel_thread: - - movi schedule_tail,r5 - ori r5, 1, r5 - ptabs r5, tr0 - blink tr0, LINK - - ld.q SP, FRAME_R(2), r2 - ld.q SP, FRAME_R(3), r3 - ptabs r3, tr0 - blink tr0, LINK - - ld.q SP, FRAME_S(FSPC), r2 - addi r2, 4, r2 /* Move PC, being pre-execution event */ - st.q SP, FRAME_S(FSPC), r2 - pta ret_from_syscall, tr0 - blink tr0, ZERO - -syscall_allowed: - /* Use LINK to deflect the exit point, default is syscall_ret */ - pta syscall_ret, tr0 - gettr tr0, LINK - pta syscall_notrace, tr0 - - getcon KCR0, r2 - ld.l r2, TI_FLAGS, r4 - movi _TIF_WORK_SYSCALL_MASK, r6 - and r6, r4, r6 - beq/l r6, ZERO, tr0 - - /* Trace it by calling syscall_trace before and after */ - movi do_syscall_trace_enter, r4 - or SP, ZERO, r2 - ptabs r4, tr0 - blink tr0, LINK - - /* Save the retval */ - st.q SP, FRAME_R(2), r2 - - /* Reload syscall number as r5 is trashed by do_syscall_trace_enter */ - ld.q SP, FRAME_S(FSYSCALL_ID), r5 - andi r5, 0x1ff, r5 - - pta syscall_ret_trace, tr0 - gettr tr0, LINK - -syscall_notrace: - /* Now point to the appropriate 4th level syscall handler */ - movi sys_call_table, r4 - shlli r5, 2, r5 - ldx.l r4, r5, r5 - ptabs r5, tr0 - - /* Prepare original args */ - ld.q SP, FRAME_R(2), r2 - ld.q SP, FRAME_R(3), r3 - ld.q SP, FRAME_R(4), r4 - ld.q SP, FRAME_R(5), r5 - ld.q SP, FRAME_R(6), r6 - ld.q SP, FRAME_R(7), r7 - - /* And now the trick for those syscalls requiring regs * ! */ - or SP, ZERO, r8 - - /* Call it */ - blink tr0, ZERO /* LINK is already properly set */ - -syscall_ret_trace: - /* We get back here only if under trace */ - st.q SP, FRAME_R(9), r2 /* Save return value */ - - movi do_syscall_trace_leave, LINK - or SP, ZERO, r2 - ptabs LINK, tr0 - blink tr0, LINK - - /* This needs to be done after any syscall tracing */ - ld.q SP, FRAME_S(FSPC), r2 - addi r2, 4, r2 /* Move PC, being pre-execution event */ - st.q SP, FRAME_S(FSPC), r2 - - pta ret_from_syscall, tr0 - blink tr0, ZERO /* Resume normal return sequence */ - -/* - * --- Switch to running under a particular ASID and return the previous ASID value - * --- The caller is assumed to have done a cli before calling this. - * - * Input r2 : new ASID - * Output r2 : old ASID - */ - - .global switch_and_save_asid -switch_and_save_asid: - getcon sr, r0 - movi 255, r4 - shlli r4, 16, r4 /* r4 = mask to select ASID */ - and r0, r4, r3 /* r3 = shifted old ASID */ - andi r2, 255, r2 /* mask down new ASID */ - shlli r2, 16, r2 /* align new ASID against SR.ASID */ - andc r0, r4, r0 /* efface old ASID from SR */ - or r0, r2, r0 /* insert the new ASID */ - putcon r0, ssr - movi 1f, r0 - putcon r0, spc - rte - nop -1: - ptabs LINK, tr0 - shlri r3, 16, r2 /* r2 = old ASID */ - blink tr0, r63 - - .global route_to_panic_handler -route_to_panic_handler: - /* Switch to real mode, goto panic_handler, don't return. Useful for - last-chance debugging, e.g. if no output wants to go to the console. - */ - - movi panic_handler - CONFIG_PAGE_OFFSET, r1 - ptabs r1, tr0 - pta 1f, tr1 - gettr tr1, r0 - putcon r0, spc - getcon sr, r0 - movi 1, r1 - shlli r1, 31, r1 - andc r0, r1, r0 - putcon r0, ssr - rte - nop -1: /* Now in real mode */ - blink tr0, r63 - nop - - .global peek_real_address_q -peek_real_address_q: - /* Two args: - r2 : real mode address to peek - r2(out) : result quadword - - This is provided as a cheapskate way of manipulating device - registers for debugging (to avoid the need to ioremap the debug - module, and to avoid the need to ioremap the watchpoint - controller in a way that identity maps sufficient bits to avoid the - SH5-101 cut2 silicon defect). - - This code is not performance critical - */ - - add.l r2, r63, r2 /* sign extend address */ - getcon sr, r0 /* r0 = saved original SR */ - movi 1, r1 - shlli r1, 28, r1 - or r0, r1, r1 /* r0 with block bit set */ - putcon r1, sr /* now in critical section */ - movi 1, r36 - shlli r36, 31, r36 - andc r1, r36, r1 /* turn sr.mmu off in real mode section */ - - putcon r1, ssr - movi .peek0 - CONFIG_PAGE_OFFSET, r36 /* real mode target address */ - movi 1f, r37 /* virtual mode return addr */ - putcon r36, spc - - synco - rte - nop - -.peek0: /* come here in real mode, don't touch caches!! - still in critical section (sr.bl==1) */ - putcon r0, ssr - putcon r37, spc - /* Here's the actual peek. If the address is bad, all bets are now off - * what will happen (handlers invoked in real-mode = bad news) */ - ld.q r2, 0, r2 - synco - rte /* Back to virtual mode */ - nop - -1: - ptabs LINK, tr0 - blink tr0, r63 - - .global poke_real_address_q -poke_real_address_q: - /* Two args: - r2 : real mode address to poke - r3 : quadword value to write. - - This is provided as a cheapskate way of manipulating device - registers for debugging (to avoid the need to ioremap the debug - module, and to avoid the need to ioremap the watchpoint - controller in a way that identity maps sufficient bits to avoid the - SH5-101 cut2 silicon defect). - - This code is not performance critical - */ - - add.l r2, r63, r2 /* sign extend address */ - getcon sr, r0 /* r0 = saved original SR */ - movi 1, r1 - shlli r1, 28, r1 - or r0, r1, r1 /* r0 with block bit set */ - putcon r1, sr /* now in critical section */ - movi 1, r36 - shlli r36, 31, r36 - andc r1, r36, r1 /* turn sr.mmu off in real mode section */ - - putcon r1, ssr - movi .poke0-CONFIG_PAGE_OFFSET, r36 /* real mode target address */ - movi 1f, r37 /* virtual mode return addr */ - putcon r36, spc - - synco - rte - nop - -.poke0: /* come here in real mode, don't touch caches!! - still in critical section (sr.bl==1) */ - putcon r0, ssr - putcon r37, spc - /* Here's the actual poke. If the address is bad, all bets are now off - * what will happen (handlers invoked in real-mode = bad news) */ - st.q r2, 0, r3 - synco - rte /* Back to virtual mode */ - nop - -1: - ptabs LINK, tr0 - blink tr0, r63 - -#ifdef CONFIG_MMU -/* - * --- User Access Handling Section - */ - -/* - * User Access support. It all moved to non inlined Assembler - * functions in here. - * - * __kernel_size_t __copy_user(void *__to, const void *__from, - * __kernel_size_t __n) - * - * Inputs: - * (r2) target address - * (r3) source address - * (r4) size in bytes - * - * Ouputs: - * (*r2) target data - * (r2) non-copied bytes - * - * If a fault occurs on the user pointer, bail out early and return the - * number of bytes not copied in r2. - * Strategy : for large blocks, call a real memcpy function which can - * move >1 byte at a time using unaligned ld/st instructions, and can - * manipulate the cache using prefetch + alloco to improve the speed - * further. If a fault occurs in that function, just revert to the - * byte-by-byte approach used for small blocks; this is rare so the - * performance hit for that case does not matter. - * - * For small blocks it's not worth the overhead of setting up and calling - * the memcpy routine; do the copy a byte at a time. - * - */ - .global __copy_user -__copy_user: - pta __copy_user_byte_by_byte, tr1 - movi 16, r0 ! this value is a best guess, should tune it by benchmarking - bge/u r0, r4, tr1 - pta copy_user_memcpy, tr0 - addi SP, -32, SP - /* Save arguments in case we have to fix-up unhandled page fault */ - st.q SP, 0, r2 - st.q SP, 8, r3 - st.q SP, 16, r4 - st.q SP, 24, r35 ! r35 is callee-save - /* Save LINK in a register to reduce RTS time later (otherwise - ld SP,*,LINK;ptabs LINK;trn;blink trn,r63 becomes a critical path) */ - ori LINK, 0, r35 - blink tr0, LINK - - /* Copy completed normally if we get back here */ - ptabs r35, tr0 - ld.q SP, 24, r35 - /* don't restore r2-r4, pointless */ - /* set result=r2 to zero as the copy must have succeeded. */ - or r63, r63, r2 - addi SP, 32, SP - blink tr0, r63 ! RTS - - .global __copy_user_fixup -__copy_user_fixup: - /* Restore stack frame */ - ori r35, 0, LINK - ld.q SP, 24, r35 - ld.q SP, 16, r4 - ld.q SP, 8, r3 - ld.q SP, 0, r2 - addi SP, 32, SP - /* Fall through to original code, in the 'same' state we entered with */ - -/* The slow byte-by-byte method is used if the fast copy traps due to a bad - user address. In that rare case, the speed drop can be tolerated. */ -__copy_user_byte_by_byte: - pta ___copy_user_exit, tr1 - pta ___copy_user1, tr0 - beq/u r4, r63, tr1 /* early exit for zero length copy */ - sub r2, r3, r0 - addi r0, -1, r0 - -___copy_user1: - ld.b r3, 0, r5 /* Fault address 1 */ - - /* Could rewrite this to use just 1 add, but the second comes 'free' - due to load latency */ - addi r3, 1, r3 - addi r4, -1, r4 /* No real fixup required */ -___copy_user2: - stx.b r3, r0, r5 /* Fault address 2 */ - bne r4, ZERO, tr0 - -___copy_user_exit: - or r4, ZERO, r2 - ptabs LINK, tr0 - blink tr0, ZERO - -/* - * __kernel_size_t __clear_user(void *addr, __kernel_size_t size) - * - * Inputs: - * (r2) target address - * (r3) size in bytes - * - * Ouputs: - * (*r2) zero-ed target data - * (r2) non-zero-ed bytes - */ - .global __clear_user -__clear_user: - pta ___clear_user_exit, tr1 - pta ___clear_user1, tr0 - beq/u r3, r63, tr1 - -___clear_user1: - st.b r2, 0, ZERO /* Fault address */ - addi r2, 1, r2 - addi r3, -1, r3 /* No real fixup required */ - bne r3, ZERO, tr0 - -___clear_user_exit: - or r3, ZERO, r2 - ptabs LINK, tr0 - blink tr0, ZERO - -#endif /* CONFIG_MMU */ - -/* - * extern long __get_user_asm_?(void *val, long addr) - * - * Inputs: - * (r2) dest address - * (r3) source address (in User Space) - * - * Ouputs: - * (r2) -EFAULT (faulting) - * 0 (not faulting) - */ - .global __get_user_asm_b -__get_user_asm_b: - or r2, ZERO, r4 - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___get_user_asm_b1: - ld.b r3, 0, r5 /* r5 = data */ - st.b r4, 0, r5 - or ZERO, ZERO, r2 - -___get_user_asm_b_exit: - ptabs LINK, tr0 - blink tr0, ZERO - - - .global __get_user_asm_w -__get_user_asm_w: - or r2, ZERO, r4 - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___get_user_asm_w1: - ld.w r3, 0, r5 /* r5 = data */ - st.w r4, 0, r5 - or ZERO, ZERO, r2 - -___get_user_asm_w_exit: - ptabs LINK, tr0 - blink tr0, ZERO - - - .global __get_user_asm_l -__get_user_asm_l: - or r2, ZERO, r4 - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___get_user_asm_l1: - ld.l r3, 0, r5 /* r5 = data */ - st.l r4, 0, r5 - or ZERO, ZERO, r2 - -___get_user_asm_l_exit: - ptabs LINK, tr0 - blink tr0, ZERO - - - .global __get_user_asm_q -__get_user_asm_q: - or r2, ZERO, r4 - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___get_user_asm_q1: - ld.q r3, 0, r5 /* r5 = data */ - st.q r4, 0, r5 - or ZERO, ZERO, r2 - -___get_user_asm_q_exit: - ptabs LINK, tr0 - blink tr0, ZERO - -/* - * extern long __put_user_asm_?(void *pval, long addr) - * - * Inputs: - * (r2) kernel pointer to value - * (r3) dest address (in User Space) - * - * Ouputs: - * (r2) -EFAULT (faulting) - * 0 (not faulting) - */ - .global __put_user_asm_b -__put_user_asm_b: - ld.b r2, 0, r4 /* r4 = data */ - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___put_user_asm_b1: - st.b r3, 0, r4 - or ZERO, ZERO, r2 - -___put_user_asm_b_exit: - ptabs LINK, tr0 - blink tr0, ZERO - - - .global __put_user_asm_w -__put_user_asm_w: - ld.w r2, 0, r4 /* r4 = data */ - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___put_user_asm_w1: - st.w r3, 0, r4 - or ZERO, ZERO, r2 - -___put_user_asm_w_exit: - ptabs LINK, tr0 - blink tr0, ZERO - - - .global __put_user_asm_l -__put_user_asm_l: - ld.l r2, 0, r4 /* r4 = data */ - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___put_user_asm_l1: - st.l r3, 0, r4 - or ZERO, ZERO, r2 - -___put_user_asm_l_exit: - ptabs LINK, tr0 - blink tr0, ZERO - - - .global __put_user_asm_q -__put_user_asm_q: - ld.q r2, 0, r4 /* r4 = data */ - movi -(EFAULT), r2 /* r2 = reply, no real fixup */ - -___put_user_asm_q1: - st.q r3, 0, r4 - or ZERO, ZERO, r2 - -___put_user_asm_q_exit: - ptabs LINK, tr0 - blink tr0, ZERO - -panic_stash_regs: - /* The idea is : when we get an unhandled panic, we dump the registers - to a known memory location, the just sit in a tight loop. - This allows the human to look at the memory region through the GDB - session (assuming the debug module's SHwy initiator isn't locked up - or anything), to hopefully analyze the cause of the panic. */ - - /* On entry, former r15 (SP) is in DCR - former r0 is at resvec_saved_area + 0 - former r1 is at resvec_saved_area + 8 - former tr0 is at resvec_saved_area + 32 - DCR is the only register whose value is lost altogether. - */ - - movi 0xffffffff80000000, r0 ! phy of dump area - ld.q SP, 0x000, r1 ! former r0 - st.q r0, 0x000, r1 - ld.q SP, 0x008, r1 ! former r1 - st.q r0, 0x008, r1 - st.q r0, 0x010, r2 - st.q r0, 0x018, r3 - st.q r0, 0x020, r4 - st.q r0, 0x028, r5 - st.q r0, 0x030, r6 - st.q r0, 0x038, r7 - st.q r0, 0x040, r8 - st.q r0, 0x048, r9 - st.q r0, 0x050, r10 - st.q r0, 0x058, r11 - st.q r0, 0x060, r12 - st.q r0, 0x068, r13 - st.q r0, 0x070, r14 - getcon dcr, r14 - st.q r0, 0x078, r14 - st.q r0, 0x080, r16 - st.q r0, 0x088, r17 - st.q r0, 0x090, r18 - st.q r0, 0x098, r19 - st.q r0, 0x0a0, r20 - st.q r0, 0x0a8, r21 - st.q r0, 0x0b0, r22 - st.q r0, 0x0b8, r23 - st.q r0, 0x0c0, r24 - st.q r0, 0x0c8, r25 - st.q r0, 0x0d0, r26 - st.q r0, 0x0d8, r27 - st.q r0, 0x0e0, r28 - st.q r0, 0x0e8, r29 - st.q r0, 0x0f0, r30 - st.q r0, 0x0f8, r31 - st.q r0, 0x100, r32 - st.q r0, 0x108, r33 - st.q r0, 0x110, r34 - st.q r0, 0x118, r35 - st.q r0, 0x120, r36 - st.q r0, 0x128, r37 - st.q r0, 0x130, r38 - st.q r0, 0x138, r39 - st.q r0, 0x140, r40 - st.q r0, 0x148, r41 - st.q r0, 0x150, r42 - st.q r0, 0x158, r43 - st.q r0, 0x160, r44 - st.q r0, 0x168, r45 - st.q r0, 0x170, r46 - st.q r0, 0x178, r47 - st.q r0, 0x180, r48 - st.q r0, 0x188, r49 - st.q r0, 0x190, r50 - st.q r0, 0x198, r51 - st.q r0, 0x1a0, r52 - st.q r0, 0x1a8, r53 - st.q r0, 0x1b0, r54 - st.q r0, 0x1b8, r55 - st.q r0, 0x1c0, r56 - st.q r0, 0x1c8, r57 - st.q r0, 0x1d0, r58 - st.q r0, 0x1d8, r59 - st.q r0, 0x1e0, r60 - st.q r0, 0x1e8, r61 - st.q r0, 0x1f0, r62 - st.q r0, 0x1f8, r63 ! bogus, but for consistency's sake... - - ld.q SP, 0x020, r1 ! former tr0 - st.q r0, 0x200, r1 - gettr tr1, r1 - st.q r0, 0x208, r1 - gettr tr2, r1 - st.q r0, 0x210, r1 - gettr tr3, r1 - st.q r0, 0x218, r1 - gettr tr4, r1 - st.q r0, 0x220, r1 - gettr tr5, r1 - st.q r0, 0x228, r1 - gettr tr6, r1 - st.q r0, 0x230, r1 - gettr tr7, r1 - st.q r0, 0x238, r1 - - getcon sr, r1 - getcon ssr, r2 - getcon pssr, r3 - getcon spc, r4 - getcon pspc, r5 - getcon intevt, r6 - getcon expevt, r7 - getcon pexpevt, r8 - getcon tra, r9 - getcon tea, r10 - getcon kcr0, r11 - getcon kcr1, r12 - getcon vbr, r13 - getcon resvec, r14 - - st.q r0, 0x240, r1 - st.q r0, 0x248, r2 - st.q r0, 0x250, r3 - st.q r0, 0x258, r4 - st.q r0, 0x260, r5 - st.q r0, 0x268, r6 - st.q r0, 0x270, r7 - st.q r0, 0x278, r8 - st.q r0, 0x280, r9 - st.q r0, 0x288, r10 - st.q r0, 0x290, r11 - st.q r0, 0x298, r12 - st.q r0, 0x2a0, r13 - st.q r0, 0x2a8, r14 - - getcon SPC,r2 - getcon SSR,r3 - getcon EXPEVT,r4 - /* Prepare to jump to C - physical address */ - movi panic_handler-CONFIG_PAGE_OFFSET, r1 - ori r1, 1, r1 - ptabs r1, tr0 - getcon DCR, SP - blink tr0, ZERO - nop - nop - nop - nop - - - - -/* - * --- Signal Handling Section - */ - -/* - * extern long long _sa_default_rt_restorer - * extern long long _sa_default_restorer - * - * or, better, - * - * extern void _sa_default_rt_restorer(void) - * extern void _sa_default_restorer(void) - * - * Code prototypes to do a sys_rt_sigreturn() or sys_sysreturn() - * from user space. Copied into user space by signal management. - * Both must be quad aligned and 2 quad long (4 instructions). - * - */ - .balign 8 - .global sa_default_rt_restorer -sa_default_rt_restorer: - movi 0x10, r9 - shori __NR_rt_sigreturn, r9 - trapa r9 - nop - - .balign 8 - .global sa_default_restorer -sa_default_restorer: - movi 0x10, r9 - shori __NR_sigreturn, r9 - trapa r9 - nop - -/* - * --- __ex_table Section - */ - -/* - * User Access Exception Table. - */ - .section __ex_table, "a" - - .global asm_uaccess_start /* Just a marker */ -asm_uaccess_start: - -#ifdef CONFIG_MMU - .long ___copy_user1, ___copy_user_exit - .long ___copy_user2, ___copy_user_exit - .long ___clear_user1, ___clear_user_exit -#endif - .long ___get_user_asm_b1, ___get_user_asm_b_exit - .long ___get_user_asm_w1, ___get_user_asm_w_exit - .long ___get_user_asm_l1, ___get_user_asm_l_exit - .long ___get_user_asm_q1, ___get_user_asm_q_exit - .long ___put_user_asm_b1, ___put_user_asm_b_exit - .long ___put_user_asm_w1, ___put_user_asm_w_exit - .long ___put_user_asm_l1, ___put_user_asm_l_exit - .long ___put_user_asm_q1, ___put_user_asm_q_exit - - .global asm_uaccess_end /* Just a marker */ -asm_uaccess_end: - - - - -/* - * --- .init.text Section - */ - - __INIT - -/* - * void trap_init (void) - * - */ - .global trap_init -trap_init: - addi SP, -24, SP /* Room to save r28/r29/r30 */ - st.q SP, 0, r28 - st.q SP, 8, r29 - st.q SP, 16, r30 - - /* Set VBR and RESVEC */ - movi LVBR_block, r19 - andi r19, -4, r19 /* reset MMUOFF + reserved */ - /* For RESVEC exceptions we force the MMU off, which means we need the - physical address. */ - movi LRESVEC_block-CONFIG_PAGE_OFFSET, r20 - andi r20, -4, r20 /* reset reserved */ - ori r20, 1, r20 /* set MMUOFF */ - putcon r19, VBR - putcon r20, RESVEC - - /* Sanity check */ - movi LVBR_block_end, r21 - andi r21, -4, r21 - movi BLOCK_SIZE, r29 /* r29 = expected size */ - or r19, ZERO, r30 - add r19, r29, r19 - - /* - * Ugly, but better loop forever now than crash afterwards. - * We should print a message, but if we touch LVBR or - * LRESVEC blocks we should not be surprised if we get stuck - * in trap_init(). - */ - pta trap_init_loop, tr1 - gettr tr1, r28 /* r28 = trap_init_loop */ - sub r21, r30, r30 /* r30 = actual size */ - - /* - * VBR/RESVEC handlers overlap by being bigger than - * allowed. Very bad. Just loop forever. - * (r28) panic/loop address - * (r29) expected size - * (r30) actual size - */ -trap_init_loop: - bne r19, r21, tr1 - - /* Now that exception vectors are set up reset SR.BL */ - getcon SR, r22 - movi SR_UNBLOCK_EXC, r23 - and r22, r23, r22 - putcon r22, SR - - addi SP, 24, SP - ptabs LINK, tr0 - blink tr0, ZERO - diff --git a/arch/sh/kernel/cpu/sh5/fpu.c b/arch/sh/kernel/cpu/sh5/fpu.c deleted file mode 100644 index 3966b5ee8e93..000000000000 --- a/arch/sh/kernel/cpu/sh5/fpu.c +++ /dev/null @@ -1,106 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/cpu/sh5/fpu.c - * - * Copyright (C) 2001 Manuela Cirronis, Paolo Alberelli - * Copyright (C) 2002 STMicroelectronics Limited - * Author : Stuart Menefy - * - * Started from SH4 version: - * Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka - */ -#include <linux/sched.h> -#include <linux/signal.h> -#include <asm/processor.h> - -void save_fpu(struct task_struct *tsk) -{ - asm volatile("fst.p %0, (0*8), fp0\n\t" - "fst.p %0, (1*8), fp2\n\t" - "fst.p %0, (2*8), fp4\n\t" - "fst.p %0, (3*8), fp6\n\t" - "fst.p %0, (4*8), fp8\n\t" - "fst.p %0, (5*8), fp10\n\t" - "fst.p %0, (6*8), fp12\n\t" - "fst.p %0, (7*8), fp14\n\t" - "fst.p %0, (8*8), fp16\n\t" - "fst.p %0, (9*8), fp18\n\t" - "fst.p %0, (10*8), fp20\n\t" - "fst.p %0, (11*8), fp22\n\t" - "fst.p %0, (12*8), fp24\n\t" - "fst.p %0, (13*8), fp26\n\t" - "fst.p %0, (14*8), fp28\n\t" - "fst.p %0, (15*8), fp30\n\t" - "fst.p %0, (16*8), fp32\n\t" - "fst.p %0, (17*8), fp34\n\t" - "fst.p %0, (18*8), fp36\n\t" - "fst.p %0, (19*8), fp38\n\t" - "fst.p %0, (20*8), fp40\n\t" - "fst.p %0, (21*8), fp42\n\t" - "fst.p %0, (22*8), fp44\n\t" - "fst.p %0, (23*8), fp46\n\t" - "fst.p %0, (24*8), fp48\n\t" - "fst.p %0, (25*8), fp50\n\t" - "fst.p %0, (26*8), fp52\n\t" - "fst.p %0, (27*8), fp54\n\t" - "fst.p %0, (28*8), fp56\n\t" - "fst.p %0, (29*8), fp58\n\t" - "fst.p %0, (30*8), fp60\n\t" - "fst.p %0, (31*8), fp62\n\t" - - "fgetscr fr63\n\t" - "fst.s %0, (32*8), fr63\n\t" - : /* no output */ - : "r" (&tsk->thread.xstate->hardfpu) - : "memory"); -} - -void restore_fpu(struct task_struct *tsk) -{ - asm volatile("fld.p %0, (0*8), fp0\n\t" - "fld.p %0, (1*8), fp2\n\t" - "fld.p %0, (2*8), fp4\n\t" - "fld.p %0, (3*8), fp6\n\t" - "fld.p %0, (4*8), fp8\n\t" - "fld.p %0, (5*8), fp10\n\t" - "fld.p %0, (6*8), fp12\n\t" - "fld.p %0, (7*8), fp14\n\t" - "fld.p %0, (8*8), fp16\n\t" - "fld.p %0, (9*8), fp18\n\t" - "fld.p %0, (10*8), fp20\n\t" - "fld.p %0, (11*8), fp22\n\t" - "fld.p %0, (12*8), fp24\n\t" - "fld.p %0, (13*8), fp26\n\t" - "fld.p %0, (14*8), fp28\n\t" - "fld.p %0, (15*8), fp30\n\t" - "fld.p %0, (16*8), fp32\n\t" - "fld.p %0, (17*8), fp34\n\t" - "fld.p %0, (18*8), fp36\n\t" - "fld.p %0, (19*8), fp38\n\t" - "fld.p %0, (20*8), fp40\n\t" - "fld.p %0, (21*8), fp42\n\t" - "fld.p %0, (22*8), fp44\n\t" - "fld.p %0, (23*8), fp46\n\t" - "fld.p %0, (24*8), fp48\n\t" - "fld.p %0, (25*8), fp50\n\t" - "fld.p %0, (26*8), fp52\n\t" - "fld.p %0, (27*8), fp54\n\t" - "fld.p %0, (28*8), fp56\n\t" - "fld.p %0, (29*8), fp58\n\t" - "fld.p %0, (30*8), fp60\n\t" - - "fld.s %0, (32*8), fr63\n\t" - "fputscr fr63\n\t" - - "fld.p %0, (31*8), fp62\n\t" - : /* no output */ - : "r" (&tsk->thread.xstate->hardfpu) - : "memory"); -} - -asmlinkage void do_fpu_error(unsigned long ex, struct pt_regs *regs) -{ - regs->pc += 4; - - force_sig(SIGFPE); -} diff --git a/arch/sh/kernel/cpu/sh5/probe.c b/arch/sh/kernel/cpu/sh5/probe.c deleted file mode 100644 index 947250188065..000000000000 --- a/arch/sh/kernel/cpu/sh5/probe.c +++ /dev/null @@ -1,72 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/cpu/sh5/probe.c - * - * CPU Subtype Probing for SH-5. - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 - 2007 Paul Mundt - */ -#include <linux/init.h> -#include <linux/io.h> -#include <linux/string.h> -#include <asm/processor.h> -#include <asm/cache.h> -#include <asm/tlb.h> - -void cpu_probe(void) -{ - unsigned long long cir; - - /* - * Do peeks in real mode to avoid having to set up a mapping for - * the WPC registers. On SH5-101 cut2, such a mapping would be - * exposed to an address translation erratum which would make it - * hard to set up correctly. - */ - cir = peek_real_address_q(0x0d000008); - if ((cir & 0xffff) == 0x5103) - boot_cpu_data.type = CPU_SH5_103; - else if (((cir >> 32) & 0xffff) == 0x51e2) - /* CPU.VCR aliased at CIR address on SH5-101 */ - boot_cpu_data.type = CPU_SH5_101; - - boot_cpu_data.family = CPU_FAMILY_SH5; - - /* - * First, setup some sane values for the I-cache. - */ - boot_cpu_data.icache.ways = 4; - boot_cpu_data.icache.sets = 256; - boot_cpu_data.icache.linesz = L1_CACHE_BYTES; - boot_cpu_data.icache.way_incr = (1 << 13); - boot_cpu_data.icache.entry_shift = 5; - boot_cpu_data.icache.way_size = boot_cpu_data.icache.sets * - boot_cpu_data.icache.linesz; - boot_cpu_data.icache.entry_mask = 0x1fe0; - boot_cpu_data.icache.flags = 0; - - /* - * Next, setup some sane values for the D-cache. - * - * On the SH5, these are pretty consistent with the I-cache settings, - * so we just copy over the existing definitions.. these can be fixed - * up later, especially if we add runtime CPU probing. - * - * Though in the meantime it saves us from having to duplicate all of - * the above definitions.. - */ - boot_cpu_data.dcache = boot_cpu_data.icache; - - /* - * Setup any cache-related flags here - */ -#if defined(CONFIG_CACHE_WRITETHROUGH) - set_bit(SH_CACHE_MODE_WT, &(boot_cpu_data.dcache.flags)); -#elif defined(CONFIG_CACHE_WRITEBACK) - set_bit(SH_CACHE_MODE_WB, &(boot_cpu_data.dcache.flags)); -#endif - - /* Setup some I/D TLB defaults */ - sh64_tlb_init(); -} diff --git a/arch/sh/kernel/cpu/sh5/setup-sh5.c b/arch/sh/kernel/cpu/sh5/setup-sh5.c deleted file mode 100644 index dc8476d67244..000000000000 --- a/arch/sh/kernel/cpu/sh5/setup-sh5.c +++ /dev/null @@ -1,121 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * SH5-101/SH5-103 CPU Setup - * - * Copyright (C) 2009 Paul Mundt - */ -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/serial_sci.h> -#include <linux/io.h> -#include <linux/mm.h> -#include <linux/sh_timer.h> -#include <asm/addrspace.h> -#include <asm/platform_early.h> - -static struct plat_sci_port scif0_platform_data = { - .flags = UPF_IOREMAP, - .scscr = SCSCR_REIE, - .type = PORT_SCIF, -}; - -static struct resource scif0_resources[] = { - DEFINE_RES_MEM(PHYS_PERIPHERAL_BLOCK + 0x01030000, 0x100), - DEFINE_RES_IRQ(39), - DEFINE_RES_IRQ(40), - DEFINE_RES_IRQ(42), -}; - -static struct platform_device scif0_device = { - .name = "sh-sci", - .id = 0, - .resource = scif0_resources, - .num_resources = ARRAY_SIZE(scif0_resources), - .dev = { - .platform_data = &scif0_platform_data, - }, -}; - -static struct resource rtc_resources[] = { - [0] = { - .start = PHYS_PERIPHERAL_BLOCK + 0x01040000, - .end = PHYS_PERIPHERAL_BLOCK + 0x01040000 + 0x58 - 1, - .flags = IORESOURCE_IO, - }, - [1] = { - /* Period IRQ */ - .start = IRQ_PRI, - .flags = IORESOURCE_IRQ, - }, - [2] = { - /* Carry IRQ */ - .start = IRQ_CUI, - .flags = IORESOURCE_IRQ, - }, - [3] = { - /* Alarm IRQ */ - .start = IRQ_ATI, - .flags = IORESOURCE_IRQ, - }, -}; - -static struct platform_device rtc_device = { - .name = "sh-rtc", - .id = -1, - .num_resources = ARRAY_SIZE(rtc_resources), - .resource = rtc_resources, -}; - -#define TMU_BLOCK_OFF 0x01020000 -#define TMU_BASE PHYS_PERIPHERAL_BLOCK + TMU_BLOCK_OFF - -static struct sh_timer_config tmu0_platform_data = { - .channels_mask = 7, -}; - -static struct resource tmu0_resources[] = { - DEFINE_RES_MEM(TMU_BASE, 0x30), - DEFINE_RES_IRQ(IRQ_TUNI0), - DEFINE_RES_IRQ(IRQ_TUNI1), - DEFINE_RES_IRQ(IRQ_TUNI2), -}; - -static struct platform_device tmu0_device = { - .name = "sh-tmu", - .id = 0, - .dev = { - .platform_data = &tmu0_platform_data, - }, - .resource = tmu0_resources, - .num_resources = ARRAY_SIZE(tmu0_resources), -}; - -static struct platform_device *sh5_early_devices[] __initdata = { - &scif0_device, - &tmu0_device, -}; - -static struct platform_device *sh5_devices[] __initdata = { - &rtc_device, -}; - -static int __init sh5_devices_setup(void) -{ - int ret; - - ret = platform_add_devices(sh5_early_devices, - ARRAY_SIZE(sh5_early_devices)); - if (unlikely(ret != 0)) - return ret; - - return platform_add_devices(sh5_devices, - ARRAY_SIZE(sh5_devices)); -} -arch_initcall(sh5_devices_setup); - -void __init plat_early_device_setup(void) -{ - sh_early_platform_add_devices(sh5_early_devices, - ARRAY_SIZE(sh5_early_devices)); -} diff --git a/arch/sh/kernel/cpu/sh5/switchto.S b/arch/sh/kernel/cpu/sh5/switchto.S deleted file mode 100644 index d1beff755632..000000000000 --- a/arch/sh/kernel/cpu/sh5/switchto.S +++ /dev/null @@ -1,195 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 - * - * arch/sh/kernel/cpu/sh5/switchto.S - * - * sh64 context switch - * - * Copyright (C) 2004 Richard Curnow -*/ - - .section .text..SHmedia32,"ax" - .little - - .balign 32 - - .type sh64_switch_to,@function - .global sh64_switch_to - .global __sh64_switch_to_end -sh64_switch_to: - -/* Incoming args - r2 - prev - r3 - &prev->thread - r4 - next - r5 - &next->thread - - Outgoing results - r2 - last (=prev) : this just stays in r2 throughout - - Want to create a full (struct pt_regs) on the stack to allow backtracing - functions to work. However, we only need to populate the callee-save - register slots in this structure; since we're a function our ancestors must - have themselves preserved all caller saved state in the stack. This saves - some wasted effort since we won't need to look at the values. - - In particular, all caller-save registers are immediately available for - scratch use. - -*/ - -#define FRAME_SIZE (76*8 + 8) - - movi FRAME_SIZE, r0 - sub.l r15, r0, r15 - ! Do normal-style register save to support backtrace - - st.l r15, 0, r18 ! save link reg - st.l r15, 4, r14 ! save fp - add.l r15, r63, r14 ! setup frame pointer - - ! hopefully this looks normal to the backtrace now. - - addi.l r15, 8, r1 ! base of pt_regs - addi.l r1, 24, r0 ! base of pt_regs.regs - addi.l r0, (63*8), r8 ! base of pt_regs.trregs - - /* Note : to be fixed? - struct pt_regs is really designed for holding the state on entry - to an exception, i.e. pc,sr,regs etc. However, for the context - switch state, some of this is not required. But the unwinder takes - struct pt_regs * as an arg so we have to build this structure - to allow unwinding switched tasks in show_state() */ - - st.q r0, ( 9*8), r9 - st.q r0, (10*8), r10 - st.q r0, (11*8), r11 - st.q r0, (12*8), r12 - st.q r0, (13*8), r13 - st.q r0, (14*8), r14 ! for unwind, want to look as though we took a trap at - ! the point where the process is left in suspended animation, i.e. current - ! fp here, not the saved one. - st.q r0, (16*8), r16 - - st.q r0, (24*8), r24 - st.q r0, (25*8), r25 - st.q r0, (26*8), r26 - st.q r0, (27*8), r27 - st.q r0, (28*8), r28 - st.q r0, (29*8), r29 - st.q r0, (30*8), r30 - st.q r0, (31*8), r31 - st.q r0, (32*8), r32 - st.q r0, (33*8), r33 - st.q r0, (34*8), r34 - st.q r0, (35*8), r35 - - st.q r0, (44*8), r44 - st.q r0, (45*8), r45 - st.q r0, (46*8), r46 - st.q r0, (47*8), r47 - st.q r0, (48*8), r48 - st.q r0, (49*8), r49 - st.q r0, (50*8), r50 - st.q r0, (51*8), r51 - st.q r0, (52*8), r52 - st.q r0, (53*8), r53 - st.q r0, (54*8), r54 - st.q r0, (55*8), r55 - st.q r0, (56*8), r56 - st.q r0, (57*8), r57 - st.q r0, (58*8), r58 - st.q r0, (59*8), r59 - - ! do this early as pta->gettr has no pipeline forwarding (=> 5 cycle latency) - ! Use a local label to avoid creating a symbol that will confuse the ! - ! backtrace - pta .Lsave_pc, tr0 - - gettr tr5, r45 - gettr tr6, r46 - gettr tr7, r47 - st.q r8, (5*8), r45 - st.q r8, (6*8), r46 - st.q r8, (7*8), r47 - - ! Now switch context - gettr tr0, r9 - st.l r3, 0, r15 ! prev->thread.sp - st.l r3, 8, r1 ! prev->thread.kregs - st.l r3, 4, r9 ! prev->thread.pc - st.q r1, 0, r9 ! save prev->thread.pc into pt_regs->pc - - ! Load PC for next task (init value or save_pc later) - ld.l r5, 4, r18 ! next->thread.pc - ! Switch stacks - ld.l r5, 0, r15 ! next->thread.sp - ptabs r18, tr0 - - ! Update current - ld.l r4, 4, r9 ! next->thread_info (2nd element of next task_struct) - putcon r9, kcr0 ! current = next->thread_info - - ! go to save_pc for a reschedule, or the initial thread.pc for a new process - blink tr0, r63 - - ! Restore (when we come back to a previously saved task) -.Lsave_pc: - addi.l r15, 32, r0 ! r0 = next's regs - addi.l r0, (63*8), r8 ! r8 = next's tr_regs - - ld.q r8, (5*8), r45 - ld.q r8, (6*8), r46 - ld.q r8, (7*8), r47 - ptabs r45, tr5 - ptabs r46, tr6 - ptabs r47, tr7 - - ld.q r0, ( 9*8), r9 - ld.q r0, (10*8), r10 - ld.q r0, (11*8), r11 - ld.q r0, (12*8), r12 - ld.q r0, (13*8), r13 - ld.q r0, (14*8), r14 - ld.q r0, (16*8), r16 - - ld.q r0, (24*8), r24 - ld.q r0, (25*8), r25 - ld.q r0, (26*8), r26 - ld.q r0, (27*8), r27 - ld.q r0, (28*8), r28 - ld.q r0, (29*8), r29 - ld.q r0, (30*8), r30 - ld.q r0, (31*8), r31 - ld.q r0, (32*8), r32 - ld.q r0, (33*8), r33 - ld.q r0, (34*8), r34 - ld.q r0, (35*8), r35 - - ld.q r0, (44*8), r44 - ld.q r0, (45*8), r45 - ld.q r0, (46*8), r46 - ld.q r0, (47*8), r47 - ld.q r0, (48*8), r48 - ld.q r0, (49*8), r49 - ld.q r0, (50*8), r50 - ld.q r0, (51*8), r51 - ld.q r0, (52*8), r52 - ld.q r0, (53*8), r53 - ld.q r0, (54*8), r54 - ld.q r0, (55*8), r55 - ld.q r0, (56*8), r56 - ld.q r0, (57*8), r57 - ld.q r0, (58*8), r58 - ld.q r0, (59*8), r59 - - ! epilogue - ld.l r15, 0, r18 - ld.l r15, 4, r14 - ptabs r18, tr0 - movi FRAME_SIZE, r0 - add r15, r0, r15 - blink tr0, r63 -__sh64_switch_to_end: -.LFE1: - .size sh64_switch_to,.LFE1-sh64_switch_to - diff --git a/arch/sh/kernel/cpu/sh5/unwind.c b/arch/sh/kernel/cpu/sh5/unwind.c deleted file mode 100644 index 3cb0cd9cea29..000000000000 --- a/arch/sh/kernel/cpu/sh5/unwind.c +++ /dev/null @@ -1,342 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/cpu/sh5/unwind.c - * - * Copyright (C) 2004 Paul Mundt - * Copyright (C) 2004 Richard Curnow - */ -#include <linux/kallsyms.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <asm/page.h> -#include <asm/ptrace.h> -#include <asm/processor.h> -#include <asm/io.h> -#include <asm/unwinder.h> -#include <asm/stacktrace.h> - -static u8 regcache[63]; - -/* - * Finding the previous stack frame isn't horribly straightforward as it is - * on some other platforms. In the sh64 case, we don't have "linked" stack - * frames, so we need to do a bit of work to determine the previous frame, - * and in turn, the previous r14/r18 pair. - * - * There are generally a few cases which determine where we can find out - * the r14/r18 values. In the general case, this can be determined by poking - * around the prologue of the symbol PC is in (note that we absolutely must - * have frame pointer support as well as the kernel symbol table mapped, - * otherwise we can't even get this far). - * - * In other cases, such as the interrupt/exception path, we can poke around - * the sp/fp. - * - * Notably, this entire approach is somewhat error prone, and in the event - * that the previous frame cannot be determined, that's all we can do. - * Either way, this still leaves us with a more correct backtrace then what - * we would be able to come up with by walking the stack (which is garbage - * for anything beyond the first frame). - * -- PFM. - */ -static int lookup_prev_stack_frame(unsigned long fp, unsigned long pc, - unsigned long *pprev_fp, unsigned long *pprev_pc, - struct pt_regs *regs) -{ - const char *sym; - char namebuf[128]; - unsigned long offset; - unsigned long prologue = 0; - unsigned long fp_displacement = 0; - unsigned long fp_prev = 0; - unsigned long offset_r14 = 0, offset_r18 = 0; - int i, found_prologue_end = 0; - - sym = kallsyms_lookup(pc, NULL, &offset, NULL, namebuf); - if (!sym) - return -EINVAL; - - prologue = pc - offset; - if (!prologue) - return -EINVAL; - - /* Validate fp, to avoid risk of dereferencing a bad pointer later. - Assume 128Mb since that's the amount of RAM on a Cayman. Modify - when there is an SH-5 board with more. */ - if ((fp < (unsigned long) phys_to_virt(__MEMORY_START)) || - (fp >= (unsigned long)(phys_to_virt(__MEMORY_START)) + 128*1024*1024) || - ((fp & 7) != 0)) { - return -EINVAL; - } - - /* - * Depth to walk, depth is completely arbitrary. - */ - for (i = 0; i < 100; i++, prologue += sizeof(unsigned long)) { - unsigned long op; - u8 major, minor; - u8 src, dest, disp; - - op = *(unsigned long *)prologue; - - major = (op >> 26) & 0x3f; - src = (op >> 20) & 0x3f; - minor = (op >> 16) & 0xf; - disp = (op >> 10) & 0x3f; - dest = (op >> 4) & 0x3f; - - /* - * Stack frame creation happens in a number of ways.. in the - * general case when the stack frame is less than 511 bytes, - * it's generally created by an addi or addi.l: - * - * addi/addi.l r15, -FRAME_SIZE, r15 - * - * in the event that the frame size is bigger than this, it's - * typically created using a movi/sub pair as follows: - * - * movi FRAME_SIZE, rX - * sub r15, rX, r15 - */ - - switch (major) { - case (0x00 >> 2): - switch (minor) { - case 0x8: /* add.l */ - case 0x9: /* add */ - /* Look for r15, r63, r14 */ - if (src == 15 && disp == 63 && dest == 14) - found_prologue_end = 1; - - break; - case 0xa: /* sub.l */ - case 0xb: /* sub */ - if (src != 15 || dest != 15) - continue; - - fp_displacement -= regcache[disp]; - fp_prev = fp - fp_displacement; - break; - } - break; - case (0xa8 >> 2): /* st.l */ - if (src != 15) - continue; - - switch (dest) { - case 14: - if (offset_r14 || fp_displacement == 0) - continue; - - offset_r14 = (u64)(((((s64)op >> 10) & 0x3ff) << 54) >> 54); - offset_r14 *= sizeof(unsigned long); - offset_r14 += fp_displacement; - break; - case 18: - if (offset_r18 || fp_displacement == 0) - continue; - - offset_r18 = (u64)(((((s64)op >> 10) & 0x3ff) << 54) >> 54); - offset_r18 *= sizeof(unsigned long); - offset_r18 += fp_displacement; - break; - } - - break; - case (0xcc >> 2): /* movi */ - if (dest >= 63) { - printk(KERN_NOTICE "%s: Invalid dest reg %d " - "specified in movi handler. Failed " - "opcode was 0x%lx: ", __func__, - dest, op); - - continue; - } - - /* Sign extend */ - regcache[dest] = - sign_extend64((((u64)op >> 10) & 0xffff), 9); - break; - case (0xd0 >> 2): /* addi */ - case (0xd4 >> 2): /* addi.l */ - /* Look for r15, -FRAME_SIZE, r15 */ - if (src != 15 || dest != 15) - continue; - - /* Sign extended frame size.. */ - fp_displacement += - (u64)(((((s64)op >> 10) & 0x3ff) << 54) >> 54); - fp_prev = fp - fp_displacement; - break; - } - - if (found_prologue_end && offset_r14 && (offset_r18 || *pprev_pc) && fp_prev) - break; - } - - if (offset_r14 == 0 || fp_prev == 0) { - if (!offset_r14) - pr_debug("Unable to find r14 offset\n"); - if (!fp_prev) - pr_debug("Unable to find previous fp\n"); - - return -EINVAL; - } - - /* For innermost leaf function, there might not be a offset_r18 */ - if (!*pprev_pc && (offset_r18 == 0)) - return -EINVAL; - - *pprev_fp = *(unsigned long *)(fp_prev + offset_r14); - - if (offset_r18) - *pprev_pc = *(unsigned long *)(fp_prev + offset_r18); - - *pprev_pc &= ~1; - - return 0; -} - -/* - * Don't put this on the stack since we'll want to call in to - * sh64_unwinder_dump() when we're close to underflowing the stack - * anyway. - */ -static struct pt_regs here_regs; - -extern const char syscall_ret; -extern const char ret_from_syscall; -extern const char ret_from_exception; -extern const char ret_from_irq; - -static void sh64_unwind_inner(const struct stacktrace_ops *ops, - void *data, struct pt_regs *regs); - -static inline void unwind_nested(const struct stacktrace_ops *ops, void *data, - unsigned long pc, unsigned long fp) -{ - if ((fp >= __MEMORY_START) && - ((fp & 7) == 0)) - sh64_unwind_inner(ops, data, (struct pt_regs *)fp); -} - -static void sh64_unwind_inner(const struct stacktrace_ops *ops, - void *data, struct pt_regs *regs) -{ - unsigned long pc, fp; - int ofs = 0; - int first_pass; - - pc = regs->pc & ~1; - fp = regs->regs[14]; - - first_pass = 1; - for (;;) { - int cond; - unsigned long next_fp, next_pc; - - if (pc == ((unsigned long)&syscall_ret & ~1)) { - printk("SYSCALL\n"); - unwind_nested(ops, data, pc, fp); - return; - } - - if (pc == ((unsigned long)&ret_from_syscall & ~1)) { - printk("SYSCALL (PREEMPTED)\n"); - unwind_nested(ops, data, pc, fp); - return; - } - - /* In this case, the PC is discovered by lookup_prev_stack_frame but - it has 4 taken off it to look like the 'caller' */ - if (pc == ((unsigned long)&ret_from_exception & ~1)) { - printk("EXCEPTION\n"); - unwind_nested(ops, data, pc, fp); - return; - } - - if (pc == ((unsigned long)&ret_from_irq & ~1)) { - printk("IRQ\n"); - unwind_nested(ops, data, pc, fp); - return; - } - - cond = ((pc >= __MEMORY_START) && (fp >= __MEMORY_START) && - ((pc & 3) == 0) && ((fp & 7) == 0)); - - pc -= ofs; - - ops->address(data, pc, 1); - - if (first_pass) { - /* If the innermost frame is a leaf function, it's - * possible that r18 is never saved out to the stack. - */ - next_pc = regs->regs[18]; - } else { - next_pc = 0; - } - - if (lookup_prev_stack_frame(fp, pc, &next_fp, &next_pc, regs) == 0) { - ofs = sizeof(unsigned long); - pc = next_pc & ~1; - fp = next_fp; - } else { - printk("Unable to lookup previous stack frame\n"); - break; - } - first_pass = 0; - } - - printk("\n"); -} - -static void sh64_unwinder_dump(struct task_struct *task, - struct pt_regs *regs, - unsigned long *sp, - const struct stacktrace_ops *ops, - void *data) -{ - if (!regs) { - /* - * Fetch current regs if we have no other saved state to back - * trace from. - */ - regs = &here_regs; - - __asm__ __volatile__ ("ori r14, 0, %0" : "=r" (regs->regs[14])); - __asm__ __volatile__ ("ori r15, 0, %0" : "=r" (regs->regs[15])); - __asm__ __volatile__ ("ori r18, 0, %0" : "=r" (regs->regs[18])); - - __asm__ __volatile__ ("gettr tr0, %0" : "=r" (regs->tregs[0])); - __asm__ __volatile__ ("gettr tr1, %0" : "=r" (regs->tregs[1])); - __asm__ __volatile__ ("gettr tr2, %0" : "=r" (regs->tregs[2])); - __asm__ __volatile__ ("gettr tr3, %0" : "=r" (regs->tregs[3])); - __asm__ __volatile__ ("gettr tr4, %0" : "=r" (regs->tregs[4])); - __asm__ __volatile__ ("gettr tr5, %0" : "=r" (regs->tregs[5])); - __asm__ __volatile__ ("gettr tr6, %0" : "=r" (regs->tregs[6])); - __asm__ __volatile__ ("gettr tr7, %0" : "=r" (regs->tregs[7])); - - __asm__ __volatile__ ( - "pta 0f, tr0\n\t" - "blink tr0, %0\n\t" - "0: nop" - : "=r" (regs->pc) - ); - } - - sh64_unwind_inner(ops, data, regs); -} - -static struct unwinder sh64_unwinder = { - .name = "sh64-unwinder", - .dump = sh64_unwinder_dump, - .rating = 150, -}; - -static int __init sh64_unwinder_init(void) -{ - return unwinder_register(&sh64_unwinder); -} -early_initcall(sh64_unwinder_init); diff --git a/arch/sh/kernel/head_64.S b/arch/sh/kernel/head_64.S deleted file mode 100644 index 67685e1f00e1..000000000000 --- a/arch/sh/kernel/head_64.S +++ /dev/null @@ -1,346 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 - * - * arch/sh/kernel/head_64.S - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003, 2004 Paul Mundt - */ - -#include <linux/init.h> - -#include <asm/page.h> -#include <asm/cache.h> -#include <asm/tlb.h> -#include <cpu/registers.h> -#include <cpu/mmu_context.h> -#include <asm/thread_info.h> - -/* - * MMU defines: TLB boundaries. - */ - -#define MMUIR_FIRST ITLB_FIXED -#define MMUIR_END ITLB_LAST_VAR_UNRESTRICTED+TLB_STEP -#define MMUIR_STEP TLB_STEP - -#define MMUDR_FIRST DTLB_FIXED -#define MMUDR_END DTLB_LAST_VAR_UNRESTRICTED+TLB_STEP -#define MMUDR_STEP TLB_STEP - -/* Safety check : CONFIG_PAGE_OFFSET has to be a multiple of 512Mb */ -#if (CONFIG_PAGE_OFFSET & ((1UL<<29)-1)) -#error "CONFIG_PAGE_OFFSET must be a multiple of 512Mb" -#endif - -/* - * MMU defines: Fixed TLBs. - */ -/* Deal safely with the case where the base of RAM is not 512Mb aligned */ - -#define ALIGN_512M_MASK (0xffffffffe0000000) -#define ALIGNED_EFFECTIVE ((CONFIG_PAGE_OFFSET + CONFIG_MEMORY_START) & ALIGN_512M_MASK) -#define ALIGNED_PHYSICAL (CONFIG_MEMORY_START & ALIGN_512M_MASK) - -#define MMUIR_TEXT_H (0x0000000000000003 | ALIGNED_EFFECTIVE) - /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ - -#define MMUIR_TEXT_L (0x000000000000009a | ALIGNED_PHYSICAL) - /* 512 Mb, Cacheable, Write-back, execute, Not User, Ph. Add. */ - -#define MMUDR_CACHED_H 0x0000000000000003 | ALIGNED_EFFECTIVE - /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ -#define MMUDR_CACHED_L 0x000000000000015a | ALIGNED_PHYSICAL - /* 512 Mb, Cacheable, Write-back, read/write, Not User, Ph. Add. */ - -#ifdef CONFIG_CACHE_OFF -#define ICCR0_INIT_VAL ICCR0_OFF /* ICACHE off */ -#else -#define ICCR0_INIT_VAL ICCR0_ON | ICCR0_ICI /* ICE + ICI */ -#endif -#define ICCR1_INIT_VAL ICCR1_NOLOCK /* No locking */ - -#if defined (CONFIG_CACHE_OFF) -#define OCCR0_INIT_VAL OCCR0_OFF /* D-cache: off */ -#elif defined (CONFIG_CACHE_WRITETHROUGH) -#define OCCR0_INIT_VAL OCCR0_ON | OCCR0_OCI | OCCR0_WT /* D-cache: on, */ - /* WT, invalidate */ -#elif defined (CONFIG_CACHE_WRITEBACK) -#define OCCR0_INIT_VAL OCCR0_ON | OCCR0_OCI | OCCR0_WB /* D-cache: on, */ - /* WB, invalidate */ -#else -#error preprocessor flag CONFIG_CACHE_... not recognized! -#endif - -#define OCCR1_INIT_VAL OCCR1_NOLOCK /* No locking */ - - .section .empty_zero_page, "aw" - .global empty_zero_page - -empty_zero_page: - .long 1 /* MOUNT_ROOT_RDONLY */ - .long 0 /* RAMDISK_FLAGS */ - .long 0x0200 /* ORIG_ROOT_DEV */ - .long 1 /* LOADER_TYPE */ - .long 0x00800000 /* INITRD_START */ - .long 0x00800000 /* INITRD_SIZE */ - .long 0 - - .text - .balign 4096,0,4096 - - .section .data, "aw" - .balign PAGE_SIZE - - .section .data, "aw" - .balign PAGE_SIZE - - .global mmu_pdtp_cache -mmu_pdtp_cache: - .space PAGE_SIZE, 0 - - .global fpu_in_use -fpu_in_use: .quad 0 - - - __HEAD - .balign L1_CACHE_BYTES -/* - * Condition at the entry of __stext: - * . Reset state: - * . SR.FD = 1 (FPU disabled) - * . SR.BL = 1 (Exceptions disabled) - * . SR.MD = 1 (Privileged Mode) - * . SR.MMU = 0 (MMU Disabled) - * . SR.CD = 0 (CTC User Visible) - * . SR.IMASK = Undefined (Interrupt Mask) - * - * Operations supposed to be performed by __stext: - * . prevent speculative fetch onto device memory while MMU is off - * . reflect as much as possible SH5 ABI (r15, r26, r27, r18) - * . first, save CPU state and set it to something harmless - * . any CPU detection and/or endianness settings (?) - * . initialize EMI/LMI (but not TMU/RTC/INTC/SCIF): TBD - * . set initial TLB entries for cached and uncached regions - * (no fine granularity paging) - * . set initial cache state - * . enable MMU and caches - * . set CPU to a consistent state - * . registers (including stack pointer and current/KCR0) - * . NOT expecting to set Exception handling nor VBR/RESVEC/DCR - * at this stage. This is all to later Linux initialization steps. - * . initialize FPU - * . clear BSS - * . jump into start_kernel() - * . be prepared to hopeless start_kernel() returns. - * - */ - .global _stext -_stext: - /* - * Prevent speculative fetch on device memory due to - * uninitialized target registers. - */ - ptabs/u ZERO, tr0 - ptabs/u ZERO, tr1 - ptabs/u ZERO, tr2 - ptabs/u ZERO, tr3 - ptabs/u ZERO, tr4 - ptabs/u ZERO, tr5 - ptabs/u ZERO, tr6 - ptabs/u ZERO, tr7 - synci - - /* - * Read/Set CPU state. After this block: - * r29 = Initial SR - */ - getcon SR, r29 - movi SR_HARMLESS, r20 - putcon r20, SR - - /* - * Initialize EMI/LMI. To Be Done. - */ - - /* - * CPU detection and/or endianness settings (?). To Be Done. - * Pure PIC code here, please ! Just save state into r30. - * After this block: - * r30 = CPU type/Platform Endianness - */ - - /* - * Set initial TLB entries for cached and uncached regions. - * Note: PTA/BLINK is PIC code, PTABS/BLINK isn't ! - */ - /* Clear ITLBs */ - pta clear_ITLB, tr1 - movi MMUIR_FIRST, r21 - movi MMUIR_END, r22 -clear_ITLB: - putcfg r21, 0, ZERO /* Clear MMUIR[n].PTEH.V */ - addi r21, MMUIR_STEP, r21 - bne r21, r22, tr1 - - /* Clear DTLBs */ - pta clear_DTLB, tr1 - movi MMUDR_FIRST, r21 - movi MMUDR_END, r22 -clear_DTLB: - putcfg r21, 0, ZERO /* Clear MMUDR[n].PTEH.V */ - addi r21, MMUDR_STEP, r21 - bne r21, r22, tr1 - - /* Map one big (512Mb) page for ITLB */ - movi MMUIR_FIRST, r21 - movi MMUIR_TEXT_L, r22 /* PTEL first */ - add.l r22, r63, r22 /* Sign extend */ - putcfg r21, 1, r22 /* Set MMUIR[0].PTEL */ - movi MMUIR_TEXT_H, r22 /* PTEH last */ - add.l r22, r63, r22 /* Sign extend */ - putcfg r21, 0, r22 /* Set MMUIR[0].PTEH */ - - /* Map one big CACHED (512Mb) page for DTLB */ - movi MMUDR_FIRST, r21 - movi MMUDR_CACHED_L, r22 /* PTEL first */ - add.l r22, r63, r22 /* Sign extend */ - putcfg r21, 1, r22 /* Set MMUDR[0].PTEL */ - movi MMUDR_CACHED_H, r22 /* PTEH last */ - add.l r22, r63, r22 /* Sign extend */ - putcfg r21, 0, r22 /* Set MMUDR[0].PTEH */ - - /* - * Setup a DTLB translation for SCIF phys. - */ - addi r21, MMUDR_STEP, r21 - movi 0x0a03, r22 /* SCIF phys */ - shori 0x0148, r22 - putcfg r21, 1, r22 /* PTEL first */ - movi 0xfa03, r22 /* 0xfa030000, fixed SCIF virt */ - shori 0x0003, r22 - putcfg r21, 0, r22 /* PTEH last */ - - /* - * Set cache behaviours. - */ - /* ICache */ - movi ICCR_BASE, r21 - movi ICCR0_INIT_VAL, r22 - movi ICCR1_INIT_VAL, r23 - putcfg r21, ICCR_REG0, r22 - putcfg r21, ICCR_REG1, r23 - - /* OCache */ - movi OCCR_BASE, r21 - movi OCCR0_INIT_VAL, r22 - movi OCCR1_INIT_VAL, r23 - putcfg r21, OCCR_REG0, r22 - putcfg r21, OCCR_REG1, r23 - - - /* - * Enable Caches and MMU. Do the first non-PIC jump. - * Now head.S global variables, constants and externs - * can be used. - */ - getcon SR, r21 - movi SR_ENABLE_MMU, r22 - or r21, r22, r21 - putcon r21, SSR - movi hyperspace, r22 - ori r22, 1, r22 /* Make it SHmedia, not required but..*/ - putcon r22, SPC - synco - rte /* And now go into the hyperspace ... */ -hyperspace: /* ... that's the next instruction ! */ - - /* - * Set CPU to a consistent state. - * r31 = FPU support flag - * tr0/tr7 in use. Others give a chance to loop somewhere safe - */ - movi start_kernel, r32 - ori r32, 1, r32 - - ptabs r32, tr0 /* r32 = _start_kernel address */ - pta/u hopeless, tr1 - pta/u hopeless, tr2 - pta/u hopeless, tr3 - pta/u hopeless, tr4 - pta/u hopeless, tr5 - pta/u hopeless, tr6 - pta/u hopeless, tr7 - gettr tr1, r28 /* r28 = hopeless address */ - - /* Set initial stack pointer */ - movi init_thread_union, SP - putcon SP, KCR0 /* Set current to init_task */ - movi THREAD_SIZE, r22 /* Point to the end */ - add SP, r22, SP - - /* - * Initialize FPU. - * Keep FPU flag in r31. After this block: - * r31 = FPU flag - */ - movi fpu_in_use, r31 /* Temporary */ - -#ifdef CONFIG_SH_FPU - getcon SR, r21 - movi SR_ENABLE_FPU, r22 - and r21, r22, r22 - putcon r22, SR /* Try to enable */ - getcon SR, r22 - xor r21, r22, r21 - shlri r21, 15, r21 /* Supposedly 0/1 */ - st.q r31, 0 , r21 /* Set fpu_in_use */ -#else - movi 0, r21 - st.q r31, 0 , r21 /* Set fpu_in_use */ -#endif - or r21, ZERO, r31 /* Set FPU flag at last */ - -#ifndef CONFIG_SH_NO_BSS_INIT -/* Don't clear BSS if running on slow platforms such as an RTL simulation, - remote memory via SHdebug link, etc. For these the memory can be guaranteed - to be all zero on boot anyway. */ - /* - * Clear bss - */ - pta clear_quad, tr1 - movi __bss_start, r22 - movi _end, r23 -clear_quad: - st.q r22, 0, ZERO - addi r22, 8, r22 - bne r22, r23, tr1 /* Both quad aligned, see vmlinux.lds.S */ -#endif - pta/u hopeless, tr1 - - /* Say bye to head.S but be prepared to wrongly get back ... */ - blink tr0, LINK - - /* If we ever get back here through LINK/tr1-tr7 */ - pta/u hopeless, tr7 - -hopeless: - /* - * Something's badly wrong here. Loop endlessly, - * there's nothing more we can do about it. - * - * Note on hopeless: it can be jumped into invariably - * before or after jumping into hyperspace. The only - * requirement is to be PIC called (PTA) before and - * any way (PTA/PTABS) after. According to Virtual - * to Physical mapping a simulator/emulator can easily - * tell where we came here from just looking at hopeless - * (PC) address. - * - * For debugging purposes: - * (r28) hopeless/loop address - * (r29) Original SR - * (r30) CPU type/Platform endianness - * (r31) FPU Support - * (r32) _start_kernel address - */ - blink tr7, ZERO diff --git a/arch/sh/kernel/irq_64.c b/arch/sh/kernel/irq_64.c deleted file mode 100644 index 7a1f50435e33..000000000000 --- a/arch/sh/kernel/irq_64.c +++ /dev/null @@ -1,48 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * SHmedia irqflags support - * - * Copyright (C) 2006 - 2009 Paul Mundt - */ -#include <linux/irqflags.h> -#include <linux/module.h> -#include <cpu/registers.h> - -void notrace arch_local_irq_restore(unsigned long flags) -{ - unsigned long long __dummy; - - if (flags == ARCH_IRQ_DISABLED) { - __asm__ __volatile__ ( - "getcon " __SR ", %0\n\t" - "or %0, %1, %0\n\t" - "putcon %0, " __SR "\n\t" - : "=&r" (__dummy) - : "r" (ARCH_IRQ_DISABLED) - ); - } else { - __asm__ __volatile__ ( - "getcon " __SR ", %0\n\t" - "and %0, %1, %0\n\t" - "putcon %0, " __SR "\n\t" - : "=&r" (__dummy) - : "r" (~ARCH_IRQ_DISABLED) - ); - } -} -EXPORT_SYMBOL(arch_local_irq_restore); - -unsigned long notrace arch_local_save_flags(void) -{ - unsigned long flags; - - __asm__ __volatile__ ( - "getcon " __SR ", %0\n\t" - "and %0, %1, %0" - : "=&r" (flags) - : "r" (ARCH_IRQ_DISABLED) - ); - - return flags; -} -EXPORT_SYMBOL(arch_local_save_flags); diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c index bbc78d1d618e..b9cee98a754e 100644 --- a/arch/sh/kernel/module.c +++ b/arch/sh/kernel/module.c @@ -46,15 +46,6 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, + ELF32_R_SYM(rel[i].r_info); relocation = sym->st_value + rel[i].r_addend; -#ifdef CONFIG_SUPERH64 - /* For text addresses, bit2 of the st_other field indicates - * whether the symbol is SHmedia (1) or SHcompact (0). If - * SHmedia, the LSB of the symbol needs to be asserted - * for the CPU to be in SHmedia mode when it starts executing - * the branch target. */ - relocation |= !!(sym->st_other & 4); -#endif - switch (ELF32_R_TYPE(rel[i].r_info)) { case R_SH_NONE: break; diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index 4d1bfc848dd3..169832fcf21b 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -23,9 +23,7 @@ EXPORT_SYMBOL(__stack_chk_guard); */ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { -#ifdef CONFIG_SUPERH32 unlazy_fpu(src, task_pt_regs(src)); -#endif *dst = *src; if (src->thread.xstate) { diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c deleted file mode 100644 index c2844a2e18cd..000000000000 --- a/arch/sh/kernel/process_64.c +++ /dev/null @@ -1,461 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/process_64.c - * - * This file handles the architecture-dependent parts of process handling.. - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 - 2007 Paul Mundt - * Copyright (C) 2003, 2004 Richard Curnow - * - * Started from SH3/4 version: - * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima - * - * In turn started from i386 version: - * Copyright (C) 1995 Linus Torvalds - */ -#include <linux/mm.h> -#include <linux/fs.h> -#include <linux/ptrace.h> -#include <linux/reboot.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/sched/debug.h> -#include <linux/sched/task.h> -#include <linux/sched/task_stack.h> -#include <asm/syscalls.h> -#include <linux/uaccess.h> -#include <asm/pgtable.h> -#include <asm/mmu_context.h> -#include <asm/fpu.h> -#include <asm/switch_to.h> - -struct task_struct *last_task_used_math = NULL; -struct pt_regs fake_swapper_regs = { 0, }; - -void show_regs(struct pt_regs *regs) -{ - unsigned long long ah, al, bh, bl, ch, cl; - - printk("\n"); - show_regs_print_info(KERN_DEFAULT); - - ah = (regs->pc) >> 32; - al = (regs->pc) & 0xffffffff; - bh = (regs->regs[18]) >> 32; - bl = (regs->regs[18]) & 0xffffffff; - ch = (regs->regs[15]) >> 32; - cl = (regs->regs[15]) & 0xffffffff; - printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->sr) >> 32; - al = (regs->sr) & 0xffffffff; - asm volatile ("getcon " __TEA ", %0" : "=r" (bh)); - asm volatile ("getcon " __TEA ", %0" : "=r" (bl)); - bh = (bh) >> 32; - bl = (bl) & 0xffffffff; - asm volatile ("getcon " __KCR0 ", %0" : "=r" (ch)); - asm volatile ("getcon " __KCR0 ", %0" : "=r" (cl)); - ch = (ch) >> 32; - cl = (cl) & 0xffffffff; - printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[0]) >> 32; - al = (regs->regs[0]) & 0xffffffff; - bh = (regs->regs[1]) >> 32; - bl = (regs->regs[1]) & 0xffffffff; - ch = (regs->regs[2]) >> 32; - cl = (regs->regs[2]) & 0xffffffff; - printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[3]) >> 32; - al = (regs->regs[3]) & 0xffffffff; - bh = (regs->regs[4]) >> 32; - bl = (regs->regs[4]) & 0xffffffff; - ch = (regs->regs[5]) >> 32; - cl = (regs->regs[5]) & 0xffffffff; - printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[6]) >> 32; - al = (regs->regs[6]) & 0xffffffff; - bh = (regs->regs[7]) >> 32; - bl = (regs->regs[7]) & 0xffffffff; - ch = (regs->regs[8]) >> 32; - cl = (regs->regs[8]) & 0xffffffff; - printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[9]) >> 32; - al = (regs->regs[9]) & 0xffffffff; - bh = (regs->regs[10]) >> 32; - bl = (regs->regs[10]) & 0xffffffff; - ch = (regs->regs[11]) >> 32; - cl = (regs->regs[11]) & 0xffffffff; - printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[12]) >> 32; - al = (regs->regs[12]) & 0xffffffff; - bh = (regs->regs[13]) >> 32; - bl = (regs->regs[13]) & 0xffffffff; - ch = (regs->regs[14]) >> 32; - cl = (regs->regs[14]) & 0xffffffff; - printk("R12 : %08Lx%08Lx R13 : %08Lx%08Lx R14 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[16]) >> 32; - al = (regs->regs[16]) & 0xffffffff; - bh = (regs->regs[17]) >> 32; - bl = (regs->regs[17]) & 0xffffffff; - ch = (regs->regs[19]) >> 32; - cl = (regs->regs[19]) & 0xffffffff; - printk("R16 : %08Lx%08Lx R17 : %08Lx%08Lx R19 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[20]) >> 32; - al = (regs->regs[20]) & 0xffffffff; - bh = (regs->regs[21]) >> 32; - bl = (regs->regs[21]) & 0xffffffff; - ch = (regs->regs[22]) >> 32; - cl = (regs->regs[22]) & 0xffffffff; - printk("R20 : %08Lx%08Lx R21 : %08Lx%08Lx R22 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[23]) >> 32; - al = (regs->regs[23]) & 0xffffffff; - bh = (regs->regs[24]) >> 32; - bl = (regs->regs[24]) & 0xffffffff; - ch = (regs->regs[25]) >> 32; - cl = (regs->regs[25]) & 0xffffffff; - printk("R23 : %08Lx%08Lx R24 : %08Lx%08Lx R25 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[26]) >> 32; - al = (regs->regs[26]) & 0xffffffff; - bh = (regs->regs[27]) >> 32; - bl = (regs->regs[27]) & 0xffffffff; - ch = (regs->regs[28]) >> 32; - cl = (regs->regs[28]) & 0xffffffff; - printk("R26 : %08Lx%08Lx R27 : %08Lx%08Lx R28 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[29]) >> 32; - al = (regs->regs[29]) & 0xffffffff; - bh = (regs->regs[30]) >> 32; - bl = (regs->regs[30]) & 0xffffffff; - ch = (regs->regs[31]) >> 32; - cl = (regs->regs[31]) & 0xffffffff; - printk("R29 : %08Lx%08Lx R30 : %08Lx%08Lx R31 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[32]) >> 32; - al = (regs->regs[32]) & 0xffffffff; - bh = (regs->regs[33]) >> 32; - bl = (regs->regs[33]) & 0xffffffff; - ch = (regs->regs[34]) >> 32; - cl = (regs->regs[34]) & 0xffffffff; - printk("R32 : %08Lx%08Lx R33 : %08Lx%08Lx R34 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[35]) >> 32; - al = (regs->regs[35]) & 0xffffffff; - bh = (regs->regs[36]) >> 32; - bl = (regs->regs[36]) & 0xffffffff; - ch = (regs->regs[37]) >> 32; - cl = (regs->regs[37]) & 0xffffffff; - printk("R35 : %08Lx%08Lx R36 : %08Lx%08Lx R37 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[38]) >> 32; - al = (regs->regs[38]) & 0xffffffff; - bh = (regs->regs[39]) >> 32; - bl = (regs->regs[39]) & 0xffffffff; - ch = (regs->regs[40]) >> 32; - cl = (regs->regs[40]) & 0xffffffff; - printk("R38 : %08Lx%08Lx R39 : %08Lx%08Lx R40 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[41]) >> 32; - al = (regs->regs[41]) & 0xffffffff; - bh = (regs->regs[42]) >> 32; - bl = (regs->regs[42]) & 0xffffffff; - ch = (regs->regs[43]) >> 32; - cl = (regs->regs[43]) & 0xffffffff; - printk("R41 : %08Lx%08Lx R42 : %08Lx%08Lx R43 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[44]) >> 32; - al = (regs->regs[44]) & 0xffffffff; - bh = (regs->regs[45]) >> 32; - bl = (regs->regs[45]) & 0xffffffff; - ch = (regs->regs[46]) >> 32; - cl = (regs->regs[46]) & 0xffffffff; - printk("R44 : %08Lx%08Lx R45 : %08Lx%08Lx R46 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[47]) >> 32; - al = (regs->regs[47]) & 0xffffffff; - bh = (regs->regs[48]) >> 32; - bl = (regs->regs[48]) & 0xffffffff; - ch = (regs->regs[49]) >> 32; - cl = (regs->regs[49]) & 0xffffffff; - printk("R47 : %08Lx%08Lx R48 : %08Lx%08Lx R49 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[50]) >> 32; - al = (regs->regs[50]) & 0xffffffff; - bh = (regs->regs[51]) >> 32; - bl = (regs->regs[51]) & 0xffffffff; - ch = (regs->regs[52]) >> 32; - cl = (regs->regs[52]) & 0xffffffff; - printk("R50 : %08Lx%08Lx R51 : %08Lx%08Lx R52 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[53]) >> 32; - al = (regs->regs[53]) & 0xffffffff; - bh = (regs->regs[54]) >> 32; - bl = (regs->regs[54]) & 0xffffffff; - ch = (regs->regs[55]) >> 32; - cl = (regs->regs[55]) & 0xffffffff; - printk("R53 : %08Lx%08Lx R54 : %08Lx%08Lx R55 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[56]) >> 32; - al = (regs->regs[56]) & 0xffffffff; - bh = (regs->regs[57]) >> 32; - bl = (regs->regs[57]) & 0xffffffff; - ch = (regs->regs[58]) >> 32; - cl = (regs->regs[58]) & 0xffffffff; - printk("R56 : %08Lx%08Lx R57 : %08Lx%08Lx R58 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[59]) >> 32; - al = (regs->regs[59]) & 0xffffffff; - bh = (regs->regs[60]) >> 32; - bl = (regs->regs[60]) & 0xffffffff; - ch = (regs->regs[61]) >> 32; - cl = (regs->regs[61]) & 0xffffffff; - printk("R59 : %08Lx%08Lx R60 : %08Lx%08Lx R61 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->regs[62]) >> 32; - al = (regs->regs[62]) & 0xffffffff; - bh = (regs->tregs[0]) >> 32; - bl = (regs->tregs[0]) & 0xffffffff; - ch = (regs->tregs[1]) >> 32; - cl = (regs->tregs[1]) & 0xffffffff; - printk("R62 : %08Lx%08Lx T0 : %08Lx%08Lx T1 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->tregs[2]) >> 32; - al = (regs->tregs[2]) & 0xffffffff; - bh = (regs->tregs[3]) >> 32; - bl = (regs->tregs[3]) & 0xffffffff; - ch = (regs->tregs[4]) >> 32; - cl = (regs->tregs[4]) & 0xffffffff; - printk("T2 : %08Lx%08Lx T3 : %08Lx%08Lx T4 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - ah = (regs->tregs[5]) >> 32; - al = (regs->tregs[5]) & 0xffffffff; - bh = (regs->tregs[6]) >> 32; - bl = (regs->tregs[6]) & 0xffffffff; - ch = (regs->tregs[7]) >> 32; - cl = (regs->tregs[7]) & 0xffffffff; - printk("T5 : %08Lx%08Lx T6 : %08Lx%08Lx T7 : %08Lx%08Lx\n", - ah, al, bh, bl, ch, cl); - - /* - * If we're in kernel mode, dump the stack too.. - */ - if (!user_mode(regs)) { - void show_stack(struct task_struct *tsk, unsigned long *sp); - unsigned long sp = regs->regs[15] & 0xffffffff; - struct task_struct *tsk = get_current(); - - tsk->thread.kregs = regs; - - show_stack(tsk, (unsigned long *)sp); - } -} - -/* - * Free current thread data structures etc.. - */ -void exit_thread(struct task_struct *tsk) -{ - /* - * See arch/sparc/kernel/process.c for the precedent for doing - * this -- RPC. - * - * The SH-5 FPU save/restore approach relies on - * last_task_used_math pointing to a live task_struct. When - * another task tries to use the FPU for the 1st time, the FPUDIS - * trap handling (see arch/sh/kernel/cpu/sh5/fpu.c) will save the - * existing FPU state to the FP regs field within - * last_task_used_math before re-loading the new task's FPU state - * (or initialising it if the FPU has been used before). So if - * last_task_used_math is stale, and its page has already been - * re-allocated for another use, the consequences are rather - * grim. Unless we null it here, there is no other path through - * which it would get safely nulled. - */ -#ifdef CONFIG_SH_FPU - if (last_task_used_math == tsk) - last_task_used_math = NULL; -#endif -} - -void flush_thread(void) -{ - - /* Called by fs/exec.c (setup_new_exec) to remove traces of a - * previously running executable. */ -#ifdef CONFIG_SH_FPU - if (last_task_used_math == current) { - last_task_used_math = NULL; - } - /* Force FPU state to be reinitialised after exec */ - clear_used_math(); -#endif - - /* if we are a kernel thread, about to change to user thread, - * update kreg - */ - if(current->thread.kregs==&fake_swapper_regs) { - current->thread.kregs = - ((struct pt_regs *)(THREAD_SIZE + (unsigned long) current) - 1); - current->thread.uregs = current->thread.kregs; - } -} - -void release_thread(struct task_struct *dead_task) -{ - /* do nothing */ -} - -/* Fill in the fpu structure for a core dump.. */ -int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) -{ -#ifdef CONFIG_SH_FPU - int fpvalid; - struct task_struct *tsk = current; - - fpvalid = !!tsk_used_math(tsk); - if (fpvalid) { - if (current == last_task_used_math) { - enable_fpu(); - save_fpu(tsk); - disable_fpu(); - last_task_used_math = 0; - regs->sr |= SR_FD; - } - - memcpy(fpu, &tsk->thread.xstate->hardfpu, sizeof(*fpu)); - } - - return fpvalid; -#else - return 0; /* Task didn't use the fpu at all. */ -#endif -} -EXPORT_SYMBOL(dump_fpu); - -asmlinkage void ret_from_fork(void); -asmlinkage void ret_from_kernel_thread(void); - -int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long arg, struct task_struct *p) -{ - struct pt_regs *childregs; - -#ifdef CONFIG_SH_FPU - /* can't happen for a kernel thread */ - if (last_task_used_math == current) { - enable_fpu(); - save_fpu(current); - disable_fpu(); - last_task_used_math = NULL; - current_pt_regs()->sr |= SR_FD; - } -#endif - /* Copy from sh version */ - childregs = (struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1; - p->thread.sp = (unsigned long) childregs; - - if (unlikely(p->flags & PF_KTHREAD)) { - memset(childregs, 0, sizeof(struct pt_regs)); - childregs->regs[2] = (unsigned long)arg; - childregs->regs[3] = (unsigned long)usp; - childregs->sr = (1 << 30); /* not user_mode */ - childregs->sr |= SR_FD; /* Invalidate FPU flag */ - p->thread.pc = (unsigned long) ret_from_kernel_thread; - return 0; - } - *childregs = *current_pt_regs(); - - /* - * Sign extend the edited stack. - * Note that thread.pc and thread.pc will stay - * 32-bit wide and context switch must take care - * of NEFF sign extension. - */ - if (usp) - childregs->regs[15] = neff_sign_extend(usp); - p->thread.uregs = childregs; - - childregs->regs[9] = 0; /* Set return value for child */ - childregs->sr |= SR_FD; /* Invalidate FPU flag */ - - p->thread.pc = (unsigned long) ret_from_fork; - - return 0; -} - -#ifdef CONFIG_FRAME_POINTER -static int in_sh64_switch_to(unsigned long pc) -{ - extern char __sh64_switch_to_end; - /* For a sleeping task, the PC is somewhere in the middle of the function, - so we don't have to worry about masking the LSB off */ - return (pc >= (unsigned long) sh64_switch_to) && - (pc < (unsigned long) &__sh64_switch_to_end); -} -#endif - -unsigned long get_wchan(struct task_struct *p) -{ - unsigned long pc; - - if (!p || p == current || p->state == TASK_RUNNING) - return 0; - - /* - * The same comment as on the Alpha applies here, too ... - */ - pc = thread_saved_pc(p); - -#ifdef CONFIG_FRAME_POINTER - if (in_sh64_switch_to(pc)) { - unsigned long schedule_fp; - unsigned long sh64_switch_to_fp; - unsigned long schedule_caller_pc; - - sh64_switch_to_fp = (long) p->thread.sp; - /* r14 is saved at offset 4 in the sh64_switch_to frame */ - schedule_fp = *(unsigned long *) (long)(sh64_switch_to_fp + 4); - - /* and the caller of 'schedule' is (currently!) saved at offset 24 - in the frame of schedule (from disasm) */ - schedule_caller_pc = *(unsigned long *) (long)(schedule_fp + 24); - return schedule_caller_pc; - } -#endif - return pc; -} diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c deleted file mode 100644 index 11085e48eaa6..000000000000 --- a/arch/sh/kernel/ptrace_64.c +++ /dev/null @@ -1,576 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/ptrace_64.c - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 - 2008 Paul Mundt - * - * Started from SH3/4 version: - * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka - * - * Original x86 implementation: - * By Ross Biro 1/23/92 - * edited by Linus Torvalds - */ -#include <linux/kernel.h> -#include <linux/rwsem.h> -#include <linux/sched.h> -#include <linux/sched/task_stack.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/bitops.h> -#include <linux/errno.h> -#include <linux/ptrace.h> -#include <linux/user.h> -#include <linux/signal.h> -#include <linux/syscalls.h> -#include <linux/audit.h> -#include <linux/seccomp.h> -#include <linux/tracehook.h> -#include <linux/elf.h> -#include <linux/regset.h> -#include <asm/io.h> -#include <linux/uaccess.h> -#include <asm/pgtable.h> -#include <asm/processor.h> -#include <asm/mmu_context.h> -#include <asm/syscalls.h> -#include <asm/fpu.h> -#include <asm/traps.h> - -#define CREATE_TRACE_POINTS -#include <trace/events/syscalls.h> - -/* This mask defines the bits of the SR which the user is not allowed to - change, which are everything except S, Q, M, PR, SZ, FR. */ -#define SR_MASK (0xffff8cfd) - -/* - * does not yet catch signals sent when the child dies. - * in exit.c or in signal.c. - */ - -/* - * This routine will get a word from the user area in the process kernel stack. - */ -static inline int get_stack_long(struct task_struct *task, int offset) -{ - unsigned char *stack; - - stack = (unsigned char *)(task->thread.uregs); - stack += offset; - return (*((int *)stack)); -} - -static inline unsigned long -get_fpu_long(struct task_struct *task, unsigned long addr) -{ - unsigned long tmp; - struct pt_regs *regs; - regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1; - - if (!tsk_used_math(task)) { - if (addr == offsetof(struct user_fpu_struct, fpscr)) { - tmp = FPSCR_INIT; - } else { - tmp = 0xffffffffUL; /* matches initial value in fpu.c */ - } - return tmp; - } - - if (last_task_used_math == task) { - enable_fpu(); - save_fpu(task); - disable_fpu(); - last_task_used_math = 0; - regs->sr |= SR_FD; - } - - tmp = ((long *)task->thread.xstate)[addr / sizeof(unsigned long)]; - return tmp; -} - -/* - * This routine will put a word into the user area in the process kernel stack. - */ -static inline int put_stack_long(struct task_struct *task, int offset, - unsigned long data) -{ - unsigned char *stack; - - stack = (unsigned char *)(task->thread.uregs); - stack += offset; - *(unsigned long *) stack = data; - return 0; -} - -static inline int -put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data) -{ - struct pt_regs *regs; - - regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1; - - if (!tsk_used_math(task)) { - init_fpu(task); - } else if (last_task_used_math == task) { - enable_fpu(); - save_fpu(task); - disable_fpu(); - last_task_used_math = 0; - regs->sr |= SR_FD; - } - - ((long *)task->thread.xstate)[addr / sizeof(unsigned long)] = data; - return 0; -} - -void user_enable_single_step(struct task_struct *child) -{ - struct pt_regs *regs = child->thread.uregs; - - regs->sr |= SR_SSTEP; /* auto-resetting upon exception */ - - set_tsk_thread_flag(child, TIF_SINGLESTEP); -} - -void user_disable_single_step(struct task_struct *child) -{ - struct pt_regs *regs = child->thread.uregs; - - regs->sr &= ~SR_SSTEP; - - clear_tsk_thread_flag(child, TIF_SINGLESTEP); -} - -static int genregs_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - const struct pt_regs *regs = task_pt_regs(target); - int ret; - - /* PC, SR, SYSCALL */ - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - ®s->pc, - 0, 3 * sizeof(unsigned long long)); - - /* R1 -> R63 */ - if (!ret) - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - regs->regs, - offsetof(struct pt_regs, regs[0]), - 63 * sizeof(unsigned long long)); - /* TR0 -> TR7 */ - if (!ret) - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, - regs->tregs, - offsetof(struct pt_regs, tregs[0]), - 8 * sizeof(unsigned long long)); - - if (!ret) - ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, - sizeof(struct pt_regs), -1); - - return ret; -} - -static int genregs_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - struct pt_regs *regs = task_pt_regs(target); - int ret; - - /* PC, SR, SYSCALL */ - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - ®s->pc, - 0, 3 * sizeof(unsigned long long)); - - /* R1 -> R63 */ - if (!ret && count > 0) - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - regs->regs, - offsetof(struct pt_regs, regs[0]), - 63 * sizeof(unsigned long long)); - - /* TR0 -> TR7 */ - if (!ret && count > 0) - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - regs->tregs, - offsetof(struct pt_regs, tregs[0]), - 8 * sizeof(unsigned long long)); - - if (!ret) - ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, - sizeof(struct pt_regs), -1); - - return ret; -} - -#ifdef CONFIG_SH_FPU -int fpregs_get(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - void *kbuf, void __user *ubuf) -{ - int ret; - - ret = init_fpu(target); - if (ret) - return ret; - - return user_regset_copyout(&pos, &count, &kbuf, &ubuf, - &target->thread.xstate->hardfpu, 0, -1); -} - -static int fpregs_set(struct task_struct *target, - const struct user_regset *regset, - unsigned int pos, unsigned int count, - const void *kbuf, const void __user *ubuf) -{ - int ret; - - ret = init_fpu(target); - if (ret) - return ret; - - set_stopped_child_used_math(target); - - return user_regset_copyin(&pos, &count, &kbuf, &ubuf, - &target->thread.xstate->hardfpu, 0, -1); -} - -static int fpregs_active(struct task_struct *target, - const struct user_regset *regset) -{ - return tsk_used_math(target) ? regset->n : 0; -} -#endif - -const struct pt_regs_offset regoffset_table[] = { - REG_OFFSET_NAME(pc), - REG_OFFSET_NAME(sr), - REG_OFFSET_NAME(syscall_nr), - REGS_OFFSET_NAME(0), - REGS_OFFSET_NAME(1), - REGS_OFFSET_NAME(2), - REGS_OFFSET_NAME(3), - REGS_OFFSET_NAME(4), - REGS_OFFSET_NAME(5), - REGS_OFFSET_NAME(6), - REGS_OFFSET_NAME(7), - REGS_OFFSET_NAME(8), - REGS_OFFSET_NAME(9), - REGS_OFFSET_NAME(10), - REGS_OFFSET_NAME(11), - REGS_OFFSET_NAME(12), - REGS_OFFSET_NAME(13), - REGS_OFFSET_NAME(14), - REGS_OFFSET_NAME(15), - REGS_OFFSET_NAME(16), - REGS_OFFSET_NAME(17), - REGS_OFFSET_NAME(18), - REGS_OFFSET_NAME(19), - REGS_OFFSET_NAME(20), - REGS_OFFSET_NAME(21), - REGS_OFFSET_NAME(22), - REGS_OFFSET_NAME(23), - REGS_OFFSET_NAME(24), - REGS_OFFSET_NAME(25), - REGS_OFFSET_NAME(26), - REGS_OFFSET_NAME(27), - REGS_OFFSET_NAME(28), - REGS_OFFSET_NAME(29), - REGS_OFFSET_NAME(30), - REGS_OFFSET_NAME(31), - REGS_OFFSET_NAME(32), - REGS_OFFSET_NAME(33), - REGS_OFFSET_NAME(34), - REGS_OFFSET_NAME(35), - REGS_OFFSET_NAME(36), - REGS_OFFSET_NAME(37), - REGS_OFFSET_NAME(38), - REGS_OFFSET_NAME(39), - REGS_OFFSET_NAME(40), - REGS_OFFSET_NAME(41), - REGS_OFFSET_NAME(42), - REGS_OFFSET_NAME(43), - REGS_OFFSET_NAME(44), - REGS_OFFSET_NAME(45), - REGS_OFFSET_NAME(46), - REGS_OFFSET_NAME(47), - REGS_OFFSET_NAME(48), - REGS_OFFSET_NAME(49), - REGS_OFFSET_NAME(50), - REGS_OFFSET_NAME(51), - REGS_OFFSET_NAME(52), - REGS_OFFSET_NAME(53), - REGS_OFFSET_NAME(54), - REGS_OFFSET_NAME(55), - REGS_OFFSET_NAME(56), - REGS_OFFSET_NAME(57), - REGS_OFFSET_NAME(58), - REGS_OFFSET_NAME(59), - REGS_OFFSET_NAME(60), - REGS_OFFSET_NAME(61), - REGS_OFFSET_NAME(62), - REGS_OFFSET_NAME(63), - TREGS_OFFSET_NAME(0), - TREGS_OFFSET_NAME(1), - TREGS_OFFSET_NAME(2), - TREGS_OFFSET_NAME(3), - TREGS_OFFSET_NAME(4), - TREGS_OFFSET_NAME(5), - TREGS_OFFSET_NAME(6), - TREGS_OFFSET_NAME(7), - REG_OFFSET_END, -}; - -/* - * These are our native regset flavours. - */ -enum sh_regset { - REGSET_GENERAL, -#ifdef CONFIG_SH_FPU - REGSET_FPU, -#endif -}; - -static const struct user_regset sh_regsets[] = { - /* - * Format is: - * PC, SR, SYSCALL, - * R1 --> R63, - * TR0 --> TR7, - */ - [REGSET_GENERAL] = { - .core_note_type = NT_PRSTATUS, - .n = ELF_NGREG, - .size = sizeof(long long), - .align = sizeof(long long), - .get = genregs_get, - .set = genregs_set, - }, - -#ifdef CONFIG_SH_FPU - [REGSET_FPU] = { - .core_note_type = NT_PRFPREG, - .n = sizeof(struct user_fpu_struct) / - sizeof(long long), - .size = sizeof(long long), - .align = sizeof(long long), - .get = fpregs_get, - .set = fpregs_set, - .active = fpregs_active, - }, -#endif -}; - -static const struct user_regset_view user_sh64_native_view = { - .name = "sh64", - .e_machine = EM_SH, - .regsets = sh_regsets, - .n = ARRAY_SIZE(sh_regsets), -}; - -const struct user_regset_view *task_user_regset_view(struct task_struct *task) -{ - return &user_sh64_native_view; -} - -long arch_ptrace(struct task_struct *child, long request, - unsigned long addr, unsigned long data) -{ - int ret; - unsigned long __user *datap = (unsigned long __user *) data; - - switch (request) { - /* read the word at location addr in the USER area. */ - case PTRACE_PEEKUSR: { - unsigned long tmp; - - ret = -EIO; - if ((addr & 3) || addr < 0) - break; - - if (addr < sizeof(struct pt_regs)) - tmp = get_stack_long(child, addr); - else if ((addr >= offsetof(struct user, fpu)) && - (addr < offsetof(struct user, u_fpvalid))) { - unsigned long index; - ret = init_fpu(child); - if (ret) - break; - index = addr - offsetof(struct user, fpu); - tmp = get_fpu_long(child, index); - } else if (addr == offsetof(struct user, u_fpvalid)) { - tmp = !!tsk_used_math(child); - } else { - break; - } - ret = put_user(tmp, datap); - break; - } - - case PTRACE_POKEUSR: - /* write the word at location addr in the USER area. We must - disallow any changes to certain SR bits or u_fpvalid, since - this could crash the kernel or result in a security - loophole. */ - ret = -EIO; - if ((addr & 3) || addr < 0) - break; - - if (addr < sizeof(struct pt_regs)) { - /* Ignore change of top 32 bits of SR */ - if (addr == offsetof (struct pt_regs, sr)+4) - { - ret = 0; - break; - } - /* If lower 32 bits of SR, ignore non-user bits */ - if (addr == offsetof (struct pt_regs, sr)) - { - long cursr = get_stack_long(child, addr); - data &= ~(SR_MASK); - data |= (cursr & SR_MASK); - } - ret = put_stack_long(child, addr, data); - } - else if ((addr >= offsetof(struct user, fpu)) && - (addr < offsetof(struct user, u_fpvalid))) { - unsigned long index; - ret = init_fpu(child); - if (ret) - break; - index = addr - offsetof(struct user, fpu); - ret = put_fpu_long(child, index, data); - } - break; - - case PTRACE_GETREGS: - return copy_regset_to_user(child, &user_sh64_native_view, - REGSET_GENERAL, - 0, sizeof(struct pt_regs), - datap); - case PTRACE_SETREGS: - return copy_regset_from_user(child, &user_sh64_native_view, - REGSET_GENERAL, - 0, sizeof(struct pt_regs), - datap); -#ifdef CONFIG_SH_FPU - case PTRACE_GETFPREGS: - return copy_regset_to_user(child, &user_sh64_native_view, - REGSET_FPU, - 0, sizeof(struct user_fpu_struct), - datap); - case PTRACE_SETFPREGS: - return copy_regset_from_user(child, &user_sh64_native_view, - REGSET_FPU, - 0, sizeof(struct user_fpu_struct), - datap); -#endif - default: - ret = ptrace_request(child, request, addr, data); - break; - } - - return ret; -} - -asmlinkage int sh64_ptrace(long request, long pid, - unsigned long addr, unsigned long data) -{ -#define WPC_DBRMODE 0x0d104008 - static unsigned long first_call; - - if (!test_and_set_bit(0, &first_call)) { - /* Set WPC.DBRMODE to 0. This makes all debug events get - * delivered through RESVEC, i.e. into the handlers in entry.S. - * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE - * would normally be left set to 1, which makes debug events get - * delivered through DBRVEC, i.e. into the remote gdb's - * handlers. This prevents ptrace getting them, and confuses - * the remote gdb.) */ - printk("DBRMODE set to 0 to permit native debugging\n"); - poke_real_address_q(WPC_DBRMODE, 0); - } - - return sys_ptrace(request, pid, addr, data); -} - -asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs) -{ - long long ret = 0; - - secure_computing_strict(regs->regs[9]); - - if (test_thread_flag(TIF_SYSCALL_TRACE) && - tracehook_report_syscall_entry(regs)) - /* - * Tracing decided this syscall should not happen. - * We'll return a bogus call number to get an ENOSYS - * error, but leave the original number in regs->regs[0]. - */ - ret = -1LL; - - if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) - trace_sys_enter(regs, regs->regs[9]); - - audit_syscall_entry(regs->regs[1], regs->regs[2], regs->regs[3], - regs->regs[4], regs->regs[5]); - - return ret ?: regs->regs[9]; -} - -asmlinkage void do_syscall_trace_leave(struct pt_regs *regs) -{ - int step; - - audit_syscall_exit(regs); - - if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) - trace_sys_exit(regs, regs->regs[9]); - - step = test_thread_flag(TIF_SINGLESTEP); - if (step || test_thread_flag(TIF_SYSCALL_TRACE)) - tracehook_report_syscall_exit(regs, step); -} - -/* Called with interrupts disabled */ -asmlinkage void do_single_step(unsigned long long vec, struct pt_regs *regs) -{ - /* This is called after a single step exception (DEBUGSS). - There is no need to change the PC, as it is a post-execution - exception, as entry.S does not do anything to the PC for DEBUGSS. - We need to clear the Single Step setting in SR to avoid - continually stepping. */ - local_irq_enable(); - regs->sr &= ~SR_SSTEP; - force_sig(SIGTRAP); -} - -/* Called with interrupts disabled */ -BUILD_TRAP_HANDLER(breakpoint) -{ - TRAP_HANDLER_DECL; - - /* We need to forward step the PC, to counteract the backstep done - in signal.c. */ - local_irq_enable(); - force_sig(SIGTRAP); - regs->pc += 4; -} - -/* - * Called by kernel/ptrace.c when detaching.. - * - * Make sure single step bits etc are not set. - */ -void ptrace_disable(struct task_struct *child) -{ - user_disable_single_step(child); -} diff --git a/arch/sh/kernel/reboot.c b/arch/sh/kernel/reboot.c index 11001a8a5fe0..5c33f036418b 100644 --- a/arch/sh/kernel/reboot.c +++ b/arch/sh/kernel/reboot.c @@ -4,9 +4,7 @@ #include <linux/kernel.h> #include <linux/reboot.h> #include <linux/module.h> -#ifdef CONFIG_SUPERH32 #include <asm/watchdog.h> -#endif #include <asm/addrspace.h> #include <asm/reboot.h> #include <asm/tlbflush.h> @@ -15,13 +13,11 @@ void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); -#ifdef CONFIG_SUPERH32 static void watchdog_trigger_immediate(void) { sh_wdt_write_cnt(0xFF); sh_wdt_write_csr(0xC2); } -#endif static void native_machine_restart(char * __unused) { @@ -33,10 +29,8 @@ static void native_machine_restart(char * __unused) /* Address error with SR.BL=1 first. */ trigger_address_error(); -#ifdef CONFIG_SUPERH32 /* If that fails or is unsupported, go for the watchdog next. */ watchdog_trigger_immediate(); -#endif /* * Give up and sleep. diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c index 282774472603..5858936cb431 100644 --- a/arch/sh/kernel/sh_ksyms_32.c +++ b/arch/sh/kernel/sh_ksyms_32.c @@ -38,6 +38,13 @@ DECLARE_EXPORT(__ashlsi3); DECLARE_EXPORT(__lshrsi3_r0); DECLARE_EXPORT(__ashrsi3_r0); DECLARE_EXPORT(__ashlsi3_r0); + +DECLARE_EXPORT(__ashiftrt_r4_0); +DECLARE_EXPORT(__ashiftrt_r4_1); +DECLARE_EXPORT(__ashiftrt_r4_2); +DECLARE_EXPORT(__ashiftrt_r4_3); +DECLARE_EXPORT(__ashiftrt_r4_4); +DECLARE_EXPORT(__ashiftrt_r4_5); DECLARE_EXPORT(__ashiftrt_r4_6); DECLARE_EXPORT(__ashiftrt_r4_7); DECLARE_EXPORT(__ashiftrt_r4_8); @@ -48,13 +55,23 @@ DECLARE_EXPORT(__ashiftrt_r4_12); DECLARE_EXPORT(__ashiftrt_r4_13); DECLARE_EXPORT(__ashiftrt_r4_14); DECLARE_EXPORT(__ashiftrt_r4_15); +DECLARE_EXPORT(__ashiftrt_r4_16); +DECLARE_EXPORT(__ashiftrt_r4_17); +DECLARE_EXPORT(__ashiftrt_r4_18); +DECLARE_EXPORT(__ashiftrt_r4_19); DECLARE_EXPORT(__ashiftrt_r4_20); DECLARE_EXPORT(__ashiftrt_r4_21); DECLARE_EXPORT(__ashiftrt_r4_22); DECLARE_EXPORT(__ashiftrt_r4_23); DECLARE_EXPORT(__ashiftrt_r4_24); +DECLARE_EXPORT(__ashiftrt_r4_25); +DECLARE_EXPORT(__ashiftrt_r4_26); DECLARE_EXPORT(__ashiftrt_r4_27); +DECLARE_EXPORT(__ashiftrt_r4_28); +DECLARE_EXPORT(__ashiftrt_r4_29); DECLARE_EXPORT(__ashiftrt_r4_30); +DECLARE_EXPORT(__ashiftrt_r4_31); +DECLARE_EXPORT(__ashiftrt_r4_32); DECLARE_EXPORT(__movstr); DECLARE_EXPORT(__movstrSI8); DECLARE_EXPORT(__movstrSI12); diff --git a/arch/sh/kernel/sh_ksyms_64.c b/arch/sh/kernel/sh_ksyms_64.c deleted file mode 100644 index 9de17065afb4..000000000000 --- a/arch/sh/kernel/sh_ksyms_64.c +++ /dev/null @@ -1,51 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/sh_ksyms_64.c - * - * Copyright (C) 2000, 2001 Paolo Alberelli - */ -#include <linux/rwsem.h> -#include <linux/module.h> -#include <linux/smp.h> -#include <linux/user.h> -#include <linux/elfcore.h> -#include <linux/sched.h> -#include <linux/in6.h> -#include <linux/interrupt.h> -#include <linux/screen_info.h> -#include <asm/cacheflush.h> -#include <asm/processor.h> -#include <linux/uaccess.h> -#include <asm/checksum.h> -#include <asm/io.h> -#include <asm/delay.h> -#include <asm/irq.h> - -EXPORT_SYMBOL(__put_user_asm_b); -EXPORT_SYMBOL(__put_user_asm_w); -EXPORT_SYMBOL(__put_user_asm_l); -EXPORT_SYMBOL(__put_user_asm_q); -EXPORT_SYMBOL(__get_user_asm_b); -EXPORT_SYMBOL(__get_user_asm_w); -EXPORT_SYMBOL(__get_user_asm_l); -EXPORT_SYMBOL(__get_user_asm_q); -EXPORT_SYMBOL(__clear_user); -EXPORT_SYMBOL(copy_page); -EXPORT_SYMBOL(__copy_user); -EXPORT_SYMBOL(empty_zero_page); -EXPORT_SYMBOL(memcpy); -EXPORT_SYMBOL(memset); -EXPORT_SYMBOL(__udelay); -EXPORT_SYMBOL(__ndelay); -EXPORT_SYMBOL(__const_udelay); -EXPORT_SYMBOL(strlen); -EXPORT_SYMBOL(strcpy); - -/* Ugh. These come in from libgcc.a at link time. */ -#define DECLARE_EXPORT(name) extern void name(void);EXPORT_SYMBOL(name) - -DECLARE_EXPORT(__sdivsi3); -DECLARE_EXPORT(__sdivsi3_1); -DECLARE_EXPORT(__sdivsi3_2); -DECLARE_EXPORT(__udivsi3); -DECLARE_EXPORT(__div_table); diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c deleted file mode 100644 index b9aaa9266b34..000000000000 --- a/arch/sh/kernel/signal_64.c +++ /dev/null @@ -1,567 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/signal_64.c - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 - 2008 Paul Mundt - * Copyright (C) 2004 Richard Curnow - */ -#include <linux/rwsem.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/kernel.h> -#include <linux/signal.h> -#include <linux/errno.h> -#include <linux/wait.h> -#include <linux/personality.h> -#include <linux/ptrace.h> -#include <linux/unistd.h> -#include <linux/stddef.h> -#include <linux/tracehook.h> -#include <asm/ucontext.h> -#include <linux/uaccess.h> -#include <asm/pgtable.h> -#include <asm/cacheflush.h> -#include <asm/fpu.h> - -#define REG_RET 9 -#define REG_ARG1 2 -#define REG_ARG2 3 -#define REG_ARG3 4 -#define REG_SP 15 -#define REG_PR 18 -#define REF_REG_RET regs->regs[REG_RET] -#define REF_REG_SP regs->regs[REG_SP] -#define DEREF_REG_PR regs->regs[REG_PR] - -#define DEBUG_SIG 0 - -static void -handle_signal(struct ksignal *ksig, struct pt_regs *regs); - -static inline void -handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa) -{ - /* If we're not from a syscall, bail out */ - if (regs->syscall_nr < 0) - return; - - /* check for system call restart.. */ - switch (regs->regs[REG_RET]) { - case -ERESTART_RESTARTBLOCK: - case -ERESTARTNOHAND: - no_system_call_restart: - regs->regs[REG_RET] = -EINTR; - break; - - case -ERESTARTSYS: - if (!(sa->sa_flags & SA_RESTART)) - goto no_system_call_restart; - /* fallthrough */ - case -ERESTARTNOINTR: - /* Decode syscall # */ - regs->regs[REG_RET] = regs->syscall_nr; - regs->pc -= 4; - break; - } -} - -/* - * Note that 'init' is a special process: it doesn't get signals it doesn't - * want to handle. Thus you cannot kill init even with a SIGKILL even by - * mistake. - * - * Note that we go through the signals twice: once to check the signals that - * the kernel can handle, and then we build all the user-level signal handling - * stack-frames in one go after that. - */ -static void do_signal(struct pt_regs *regs) -{ - struct ksignal ksig; - - /* - * We want the common case to go fast, which - * is why we may in certain cases get here from - * kernel mode. Just return without doing anything - * if so. - */ - if (!user_mode(regs)) - return; - - if (get_signal(&ksig)) { - handle_syscall_restart(regs, &ksig.ka.sa); - - /* Whee! Actually deliver the signal. */ - handle_signal(&ksig, regs); - return; - } - - /* Did we come from a system call? */ - if (regs->syscall_nr >= 0) { - /* Restart the system call - no handlers present */ - switch (regs->regs[REG_RET]) { - case -ERESTARTNOHAND: - case -ERESTARTSYS: - case -ERESTARTNOINTR: - /* Decode Syscall # */ - regs->regs[REG_RET] = regs->syscall_nr; - regs->pc -= 4; - break; - - case -ERESTART_RESTARTBLOCK: - regs->regs[REG_RET] = __NR_restart_syscall; - regs->pc -= 4; - break; - } - } - - /* No signal to deliver -- put the saved sigmask back */ - restore_saved_sigmask(); -} - -/* - * Do a signal return; undo the signal stack. - */ -struct sigframe { - struct sigcontext sc; - unsigned long extramask[_NSIG_WORDS-1]; - long long retcode[2]; -}; - -struct rt_sigframe { - struct siginfo __user *pinfo; - void *puc; - struct siginfo info; - struct ucontext uc; - long long retcode[2]; -}; - -#ifdef CONFIG_SH_FPU -static inline int -restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) -{ - int err = 0; - int fpvalid; - - err |= __get_user (fpvalid, &sc->sc_fpvalid); - conditional_used_math(fpvalid); - if (! fpvalid) - return err; - - if (current == last_task_used_math) { - last_task_used_math = NULL; - regs->sr |= SR_FD; - } - - err |= __copy_from_user(¤t->thread.xstate->hardfpu, &sc->sc_fpregs[0], - (sizeof(long long) * 32) + (sizeof(int) * 1)); - - return err; -} - -static inline int -setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) -{ - int err = 0; - int fpvalid; - - fpvalid = !!used_math(); - err |= __put_user(fpvalid, &sc->sc_fpvalid); - if (! fpvalid) - return err; - - if (current == last_task_used_math) { - enable_fpu(); - save_fpu(current); - disable_fpu(); - last_task_used_math = NULL; - regs->sr |= SR_FD; - } - - err |= __copy_to_user(&sc->sc_fpregs[0], ¤t->thread.xstate->hardfpu, - (sizeof(long long) * 32) + (sizeof(int) * 1)); - clear_used_math(); - - return err; -} -#else -static inline int -restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) -{ - return 0; -} -static inline int -setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) -{ - return 0; -} -#endif - -static int -restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, long long *r2_p) -{ - unsigned int err = 0; - unsigned long long current_sr, new_sr; -#define SR_MASK 0xffff8cfd - -#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) - - COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]); - COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]); - COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]); - COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]); - COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]); - COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]); - COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]); - COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]); - COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]); - COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]); - COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]); - COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]); - COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]); - COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]); - COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]); - COPY(regs[60]); COPY(regs[61]); COPY(regs[62]); - COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]); - COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]); - - /* Prevent the signal handler manipulating SR in a way that can - crash the kernel. i.e. only allow S, Q, M, PR, SZ, FR to be - modified */ - current_sr = regs->sr; - err |= __get_user(new_sr, &sc->sc_sr); - regs->sr &= SR_MASK; - regs->sr |= (new_sr & ~SR_MASK); - - COPY(pc); - -#undef COPY - - /* Must do this last in case it sets regs->sr.fd (i.e. after rest of sr - * has been restored above.) */ - err |= restore_sigcontext_fpu(regs, sc); - - regs->syscall_nr = -1; /* disable syscall checks */ - err |= __get_user(*r2_p, &sc->sc_regs[REG_RET]); - return err; -} - -asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3, - unsigned long r4, unsigned long r5, - unsigned long r6, unsigned long r7, - struct pt_regs * regs) -{ - struct sigframe __user *frame = (struct sigframe __user *) (long) REF_REG_SP; - sigset_t set; - long long ret; - - /* Always make any pending restarted system calls return -EINTR */ - current->restart_block.fn = do_no_restart_syscall; - - if (!access_ok(frame, sizeof(*frame))) - goto badframe; - - if (__get_user(set.sig[0], &frame->sc.oldmask) - || (_NSIG_WORDS > 1 - && __copy_from_user(&set.sig[1], &frame->extramask, - sizeof(frame->extramask)))) - goto badframe; - - set_current_blocked(&set); - - if (restore_sigcontext(regs, &frame->sc, &ret)) - goto badframe; - regs->pc -= 4; - - return (int) ret; - -badframe: - force_sig(SIGSEGV); - return 0; -} - -asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3, - unsigned long r4, unsigned long r5, - unsigned long r6, unsigned long r7, - struct pt_regs * regs) -{ - struct rt_sigframe __user *frame = (struct rt_sigframe __user *) (long) REF_REG_SP; - sigset_t set; - long long ret; - - /* Always make any pending restarted system calls return -EINTR */ - current->restart_block.fn = do_no_restart_syscall; - - if (!access_ok(frame, sizeof(*frame))) - goto badframe; - - if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) - goto badframe; - - set_current_blocked(&set); - - if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ret)) - goto badframe; - regs->pc -= 4; - - if (restore_altstack(&frame->uc.uc_stack)) - goto badframe; - - return (int) ret; - -badframe: - force_sig(SIGSEGV); - return 0; -} - -/* - * Set up a signal frame. - */ -static int -setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, - unsigned long mask) -{ - int err = 0; - - /* Do this first, otherwise is this sets sr->fd, that value isn't preserved. */ - err |= setup_sigcontext_fpu(regs, sc); - -#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) - - COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]); - COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]); - COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]); - COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]); - COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]); - COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]); - COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]); - COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]); - COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]); - COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]); - COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]); - COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]); - COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]); - COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]); - COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]); - COPY(regs[60]); COPY(regs[61]); COPY(regs[62]); - COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]); - COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]); - COPY(sr); COPY(pc); - -#undef COPY - - err |= __put_user(mask, &sc->oldmask); - - return err; -} - -/* - * Determine which stack to use.. - */ -static inline void __user * -get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) -{ - if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp)) - sp = current->sas_ss_sp + current->sas_ss_size; - - return (void __user *)((sp - frame_size) & -8ul); -} - -void sa_default_restorer(void); /* See comments below */ -void sa_default_rt_restorer(void); /* See comments below */ - -static int setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) -{ - struct sigframe __user *frame; - int err = 0, sig = ksig->sig; - int signal; - - frame = get_sigframe(&ksig->ka, regs->regs[REG_SP], sizeof(*frame)); - - if (!access_ok(frame, sizeof(*frame))) - return -EFAULT; - - err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); - - /* Give up earlier as i386, in case */ - if (err) - return -EFAULT; - - if (_NSIG_WORDS > 1) { - err |= __copy_to_user(frame->extramask, &set->sig[1], - sizeof(frame->extramask)); } - - /* Give up earlier as i386, in case */ - if (err) - return -EFAULT; - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ksig->ka.sa.sa_flags & SA_RESTORER) { - /* - * On SH5 all edited pointers are subject to NEFF - */ - DEREF_REG_PR = neff_sign_extend((unsigned long) - ksig->ka->sa.sa_restorer | 0x1); - } else { - /* - * Different approach on SH5. - * . Endianness independent asm code gets placed in entry.S . - * This is limited to four ASM instructions corresponding - * to two long longs in size. - * . err checking is done on the else branch only - * . flush_icache_range() is called upon __put_user() only - * . all edited pointers are subject to NEFF - * . being code, linker turns ShMedia bit on, always - * dereference index -1. - */ - DEREF_REG_PR = neff_sign_extend((unsigned long) - frame->retcode | 0x01); - - if (__copy_to_user(frame->retcode, - (void *)((unsigned long)sa_default_restorer & (~1)), 16) != 0) - return -EFAULT; - - /* Cohere the trampoline with the I-cache. */ - flush_cache_sigtramp(DEREF_REG_PR-1); - } - - /* - * Set up registers for signal handler. - * All edited pointers are subject to NEFF. - */ - regs->regs[REG_SP] = neff_sign_extend((unsigned long)frame); - regs->regs[REG_ARG1] = sig; /* Arg for signal handler */ - - /* FIXME: - The glibc profiling support for SH-5 needs to be passed a sigcontext - so it can retrieve the PC. At some point during 2003 the glibc - support was changed to receive the sigcontext through the 2nd - argument, but there are still versions of libc.so in use that use - the 3rd argument. Until libc.so is stabilised, pass the sigcontext - through both 2nd and 3rd arguments. - */ - - regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->sc; - regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->sc; - - regs->pc = neff_sign_extend((unsigned long)ksig->ka.sa.sa_handler); - - /* Broken %016Lx */ - pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n", - sig, current->comm, current->pid, frame, - regs->pc >> 32, regs->pc & 0xffffffff, - DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff); - - return 0; -} - -static int setup_rt_frame(struct ksignal *kig, sigset_t *set, - struct pt_regs *regs) -{ - struct rt_sigframe __user *frame; - int err = 0, sig = ksig->sig; - - frame = get_sigframe(&ksig->ka, regs->regs[REG_SP], sizeof(*frame)); - - if (!access_ok(frame, sizeof(*frame))) - return -EFAULT; - - err |= __put_user(&frame->info, &frame->pinfo); - err |= __put_user(&frame->uc, &frame->puc); - err |= copy_siginfo_to_user(&frame->info, &ksig->info); - - /* Give up earlier as i386, in case */ - if (err) - return -EFAULT; - - /* Create the ucontext. */ - err |= __put_user(0, &frame->uc.uc_flags); - err |= __put_user(0, &frame->uc.uc_link); - err |= __save_altstack(&frame->uc.uc_stack, regs->regs[REG_SP]); - err |= setup_sigcontext(&frame->uc.uc_mcontext, - regs, set->sig[0]); - err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); - - /* Give up earlier as i386, in case */ - if (err) - return -EFAULT; - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ksig->ka.sa.sa_flags & SA_RESTORER) { - /* - * On SH5 all edited pointers are subject to NEFF - */ - DEREF_REG_PR = neff_sign_extend((unsigned long) - ksig->ka.sa.sa_restorer | 0x1); - } else { - /* - * Different approach on SH5. - * . Endianness independent asm code gets placed in entry.S . - * This is limited to four ASM instructions corresponding - * to two long longs in size. - * . err checking is done on the else branch only - * . flush_icache_range() is called upon __put_user() only - * . all edited pointers are subject to NEFF - * . being code, linker turns ShMedia bit on, always - * dereference index -1. - */ - DEREF_REG_PR = neff_sign_extend((unsigned long) - frame->retcode | 0x01); - - if (__copy_to_user(frame->retcode, - (void *)((unsigned long)sa_default_rt_restorer & (~1)), 16) != 0) - return -EFAULT; - - /* Cohere the trampoline with the I-cache. */ - flush_icache_range(DEREF_REG_PR-1, DEREF_REG_PR-1+15); - } - - /* - * Set up registers for signal handler. - * All edited pointers are subject to NEFF. - */ - regs->regs[REG_SP] = neff_sign_extend((unsigned long)frame); - regs->regs[REG_ARG1] = sig; /* Arg for signal handler */ - regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->info; - regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->uc.uc_mcontext; - regs->pc = neff_sign_extend((unsigned long)ksig->ka.sa.sa_handler); - - pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n", - sig, current->comm, current->pid, frame, - regs->pc >> 32, regs->pc & 0xffffffff, - DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff); - - return 0; -} - -/* - * OK, we're invoking a handler - */ -static void -handle_signal(struct ksignal *ksig, struct pt_regs *regs) -{ - sigset_t *oldset = sigmask_to_save(); - int ret; - - /* Set up the stack frame */ - if (ksig->ka.sa.sa_flags & SA_SIGINFO) - ret = setup_rt_frame(ksig, oldset, regs); - else - ret = setup_frame(ksig, oldset, regs); - - signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); -} - -asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) -{ - if (thread_info_flags & _TIF_SIGPENDING) - do_signal(regs); - - if (thread_info_flags & _TIF_NOTIFY_RESUME) { - clear_thread_flag(TIF_NOTIFY_RESUME); - tracehook_notify_resume(regs); - } -} diff --git a/arch/sh/kernel/syscalls_64.S b/arch/sh/kernel/syscalls_64.S deleted file mode 100644 index 1bcb86f0b728..000000000000 --- a/arch/sh/kernel/syscalls_64.S +++ /dev/null @@ -1,419 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 - * - * arch/sh/kernel/syscalls_64.S - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2004 - 2007 Paul Mundt - * Copyright (C) 2003, 2004 Richard Curnow - */ - -#include <linux/sys.h> - - .section .data, "aw" - .balign 32 - -/* - * System calls jump table - */ - .globl sys_call_table -sys_call_table: - .long sys_restart_syscall /* 0 - old "setup()" system call */ - .long sys_exit - .long sys_fork - .long sys_read - .long sys_write - .long sys_open /* 5 */ - .long sys_close - .long sys_waitpid - .long sys_creat - .long sys_link - .long sys_unlink /* 10 */ - .long sys_execve - .long sys_chdir - .long sys_time - .long sys_mknod - .long sys_chmod /* 15 */ - .long sys_lchown16 - .long sys_ni_syscall /* old break syscall holder */ - .long sys_stat - .long sys_lseek - .long sys_getpid /* 20 */ - .long sys_mount - .long sys_oldumount - .long sys_setuid16 - .long sys_getuid16 - .long sys_stime /* 25 */ - .long sh64_ptrace - .long sys_alarm - .long sys_fstat - .long sys_pause - .long sys_utime /* 30 */ - .long sys_ni_syscall /* old stty syscall holder */ - .long sys_ni_syscall /* old gtty syscall holder */ - .long sys_access - .long sys_nice - .long sys_ni_syscall /* 35 */ /* old ftime syscall holder */ - .long sys_sync - .long sys_kill - .long sys_rename - .long sys_mkdir - .long sys_rmdir /* 40 */ - .long sys_dup - .long sys_pipe - .long sys_times - .long sys_ni_syscall /* old prof syscall holder */ - .long sys_brk /* 45 */ - .long sys_setgid16 - .long sys_getgid16 - .long sys_signal - .long sys_geteuid16 - .long sys_getegid16 /* 50 */ - .long sys_acct - .long sys_umount /* recycled never used phys( */ - .long sys_ni_syscall /* old lock syscall holder */ - .long sys_ioctl - .long sys_fcntl /* 55 */ - .long sys_ni_syscall /* old mpx syscall holder */ - .long sys_setpgid - .long sys_ni_syscall /* old ulimit syscall holder */ - .long sys_ni_syscall /* sys_olduname */ - .long sys_umask /* 60 */ - .long sys_chroot - .long sys_ustat - .long sys_dup2 - .long sys_getppid - .long sys_getpgrp /* 65 */ - .long sys_setsid - .long sys_sigaction - .long sys_sgetmask - .long sys_ssetmask - .long sys_setreuid16 /* 70 */ - .long sys_setregid16 - .long sys_sigsuspend - .long sys_sigpending - .long sys_sethostname - .long sys_setrlimit /* 75 */ - .long sys_old_getrlimit - .long sys_getrusage - .long sys_gettimeofday - .long sys_settimeofday - .long sys_getgroups16 /* 80 */ - .long sys_setgroups16 - .long sys_ni_syscall /* sys_oldselect */ - .long sys_symlink - .long sys_lstat - .long sys_readlink /* 85 */ - .long sys_uselib - .long sys_swapon - .long sys_reboot - .long sys_old_readdir - .long old_mmap /* 90 */ - .long sys_munmap - .long sys_truncate - .long sys_ftruncate - .long sys_fchmod - .long sys_fchown16 /* 95 */ - .long sys_getpriority - .long sys_setpriority - .long sys_ni_syscall /* old profil syscall holder */ - .long sys_statfs - .long sys_fstatfs /* 100 */ - .long sys_ni_syscall /* ioperm */ - .long sys_socketcall /* Obsolete implementation of socket syscall */ - .long sys_syslog - .long sys_setitimer - .long sys_getitimer /* 105 */ - .long sys_newstat - .long sys_newlstat - .long sys_newfstat - .long sys_uname - .long sys_ni_syscall /* 110 */ /* iopl */ - .long sys_vhangup - .long sys_ni_syscall /* idle */ - .long sys_ni_syscall /* vm86old */ - .long sys_wait4 - .long sys_swapoff /* 115 */ - .long sys_sysinfo - .long sys_ipc /* Obsolete ipc syscall implementation */ - .long sys_fsync - .long sys_sigreturn - .long sys_clone /* 120 */ - .long sys_setdomainname - .long sys_newuname - .long sys_cacheflush /* x86: sys_modify_ldt */ - .long sys_adjtimex - .long sys_mprotect /* 125 */ - .long sys_sigprocmask - .long sys_ni_syscall /* old "create_module" */ - .long sys_init_module - .long sys_delete_module - .long sys_ni_syscall /* 130: old "get_kernel_syms" */ - .long sys_quotactl - .long sys_getpgid - .long sys_fchdir - .long sys_bdflush - .long sys_sysfs /* 135 */ - .long sys_personality - .long sys_ni_syscall /* for afs_syscall */ - .long sys_setfsuid16 - .long sys_setfsgid16 - .long sys_llseek /* 140 */ - .long sys_getdents - .long sys_select - .long sys_flock - .long sys_msync - .long sys_readv /* 145 */ - .long sys_writev - .long sys_getsid - .long sys_fdatasync - .long sys_sysctl - .long sys_mlock /* 150 */ - .long sys_munlock - .long sys_mlockall - .long sys_munlockall - .long sys_sched_setparam - .long sys_sched_getparam /* 155 */ - .long sys_sched_setscheduler - .long sys_sched_getscheduler - .long sys_sched_yield - .long sys_sched_get_priority_max - .long sys_sched_get_priority_min /* 160 */ - .long sys_sched_rr_get_interval - .long sys_nanosleep - .long sys_mremap - .long sys_setresuid16 - .long sys_getresuid16 /* 165 */ - .long sys_ni_syscall /* vm86 */ - .long sys_ni_syscall /* old "query_module" */ - .long sys_poll - .long sys_ni_syscall /* was nfsservctl */ - .long sys_setresgid16 /* 170 */ - .long sys_getresgid16 - .long sys_prctl - .long sys_rt_sigreturn - .long sys_rt_sigaction - .long sys_rt_sigprocmask /* 175 */ - .long sys_rt_sigpending - .long sys_rt_sigtimedwait - .long sys_rt_sigqueueinfo - .long sys_rt_sigsuspend - .long sys_pread64 /* 180 */ - .long sys_pwrite64 - .long sys_chown16 - .long sys_getcwd - .long sys_capget - .long sys_capset /* 185 */ - .long sys_sigaltstack - .long sys_sendfile - .long sys_ni_syscall /* getpmsg */ - .long sys_ni_syscall /* putpmsg */ - .long sys_vfork /* 190 */ - .long sys_getrlimit - .long sys_mmap2 - .long sys_truncate64 - .long sys_ftruncate64 - .long sys_stat64 /* 195 */ - .long sys_lstat64 - .long sys_fstat64 - .long sys_lchown - .long sys_getuid - .long sys_getgid /* 200 */ - .long sys_geteuid - .long sys_getegid - .long sys_setreuid - .long sys_setregid - .long sys_getgroups /* 205 */ - .long sys_setgroups - .long sys_fchown - .long sys_setresuid - .long sys_getresuid - .long sys_setresgid /* 210 */ - .long sys_getresgid - .long sys_chown - .long sys_setuid - .long sys_setgid - .long sys_setfsuid /* 215 */ - .long sys_setfsgid - .long sys_pivot_root - .long sys_mincore - .long sys_madvise - /* Broken-out socket family (maintain backwards compatibility in syscall - numbering with 2.4) */ - .long sys_socket /* 220 */ - .long sys_bind - .long sys_connect - .long sys_listen - .long sys_accept - .long sys_getsockname /* 225 */ - .long sys_getpeername - .long sys_socketpair - .long sys_send - .long sys_sendto - .long sys_recv /* 230*/ - .long sys_recvfrom - .long sys_shutdown - .long sys_setsockopt - .long sys_getsockopt - .long sys_sendmsg /* 235 */ - .long sys_recvmsg - /* Broken-out IPC family (maintain backwards compatibility in syscall - numbering with 2.4) */ - .long sys_semop - .long sys_semget - .long sys_semctl - .long sys_msgsnd /* 240 */ - .long sys_msgrcv - .long sys_msgget - .long sys_msgctl - .long sys_shmat - .long sys_shmdt /* 245 */ - .long sys_shmget - .long sys_shmctl - /* Rest of syscalls listed in 2.4 i386 unistd.h */ - .long sys_getdents64 - .long sys_fcntl64 - .long sys_ni_syscall /* 250 reserved for TUX */ - .long sys_ni_syscall /* Reserved for Security */ - .long sys_gettid - .long sys_readahead - .long sys_setxattr - .long sys_lsetxattr /* 255 */ - .long sys_fsetxattr - .long sys_getxattr - .long sys_lgetxattr - .long sys_fgetxattr - .long sys_listxattr /* 260 */ - .long sys_llistxattr - .long sys_flistxattr - .long sys_removexattr - .long sys_lremovexattr - .long sys_fremovexattr /* 265 */ - .long sys_tkill - .long sys_sendfile64 - .long sys_futex - .long sys_sched_setaffinity - .long sys_sched_getaffinity /* 270 */ - .long sys_ni_syscall /* reserved for set_thread_area */ - .long sys_ni_syscall /* reserved for get_thread_area */ - .long sys_io_setup - .long sys_io_destroy - .long sys_io_getevents /* 275 */ - .long sys_io_submit - .long sys_io_cancel - .long sys_fadvise64 - .long sys_ni_syscall - .long sys_exit_group /* 280 */ - /* Rest of new 2.6 syscalls */ - .long sys_lookup_dcookie - .long sys_epoll_create - .long sys_epoll_ctl - .long sys_epoll_wait - .long sys_remap_file_pages /* 285 */ - .long sys_set_tid_address - .long sys_timer_create - .long sys_timer_settime - .long sys_timer_gettime - .long sys_timer_getoverrun /* 290 */ - .long sys_timer_delete - .long sys_clock_settime - .long sys_clock_gettime - .long sys_clock_getres - .long sys_clock_nanosleep /* 295 */ - .long sys_statfs64 - .long sys_fstatfs64 - .long sys_tgkill - .long sys_utimes - .long sys_fadvise64_64 /* 300 */ - .long sys_ni_syscall /* Reserved for vserver */ - .long sys_ni_syscall /* Reserved for mbind */ - .long sys_ni_syscall /* get_mempolicy */ - .long sys_ni_syscall /* set_mempolicy */ - .long sys_mq_open /* 305 */ - .long sys_mq_unlink - .long sys_mq_timedsend - .long sys_mq_timedreceive - .long sys_mq_notify - .long sys_mq_getsetattr /* 310 */ - .long sys_ni_syscall /* Reserved for kexec */ - .long sys_waitid - .long sys_add_key - .long sys_request_key - .long sys_keyctl /* 315 */ - .long sys_ioprio_set - .long sys_ioprio_get - .long sys_inotify_init - .long sys_inotify_add_watch - .long sys_inotify_rm_watch /* 320 */ - .long sys_ni_syscall - .long sys_migrate_pages - .long sys_openat - .long sys_mkdirat - .long sys_mknodat /* 325 */ - .long sys_fchownat - .long sys_futimesat - .long sys_fstatat64 - .long sys_unlinkat - .long sys_renameat /* 330 */ - .long sys_linkat - .long sys_symlinkat - .long sys_readlinkat - .long sys_fchmodat - .long sys_faccessat /* 335 */ - .long sys_pselect6 - .long sys_ppoll - .long sys_unshare - .long sys_set_robust_list - .long sys_get_robust_list /* 340 */ - .long sys_splice - .long sys_sync_file_range - .long sys_tee - .long sys_vmsplice - .long sys_move_pages /* 345 */ - .long sys_getcpu - .long sys_epoll_pwait - .long sys_utimensat - .long sys_signalfd - .long sys_timerfd_create /* 350 */ - .long sys_eventfd - .long sys_fallocate - .long sys_timerfd_settime - .long sys_timerfd_gettime - .long sys_signalfd4 /* 355 */ - .long sys_eventfd2 - .long sys_epoll_create1 - .long sys_dup3 - .long sys_pipe2 - .long sys_inotify_init1 /* 360 */ - .long sys_preadv - .long sys_pwritev - .long sys_rt_tgsigqueueinfo - .long sys_perf_event_open - .long sys_recvmmsg /* 365 */ - .long sys_accept4 - .long sys_fanotify_init - .long sys_fanotify_mark - .long sys_prlimit64 - .long sys_name_to_handle_at /* 370 */ - .long sys_open_by_handle_at - .long sys_clock_adjtime - .long sys_syncfs - .long sys_sendmmsg - .long sys_setns /* 375 */ - .long sys_process_vm_readv - .long sys_process_vm_writev - .long sys_kcmp - .long sys_finit_module - .long sys_sched_getattr /* 380 */ - .long sys_sched_setattr - .long sys_renameat2 - .long sys_seccomp - .long sys_getrandom - .long sys_memfd_create /* 385 */ - .long sys_bpf - .long sys_execveat - .long sys_userfaultfd - .long sys_membarrier - .long sys_mlock2 /* 390 */ - .long sys_copy_file_range - .long sys_preadv2 - .long sys_pwritev2 diff --git a/arch/sh/kernel/traps_64.c b/arch/sh/kernel/traps_64.c deleted file mode 100644 index 37046f3a26d3..000000000000 --- a/arch/sh/kernel/traps_64.c +++ /dev/null @@ -1,814 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * arch/sh/kernel/traps_64.c - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003, 2004 Paul Mundt - * Copyright (C) 2003, 2004 Richard Curnow - */ -#include <linux/sched.h> -#include <linux/sched/debug.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/ptrace.h> -#include <linux/timer.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/spinlock.h> -#include <linux/kallsyms.h> -#include <linux/interrupt.h> -#include <linux/sysctl.h> -#include <linux/module.h> -#include <linux/perf_event.h> -#include <linux/uaccess.h> -#include <asm/io.h> -#include <asm/alignment.h> -#include <asm/processor.h> -#include <asm/pgtable.h> -#include <asm/fpu.h> - -static int read_opcode(reg_size_t pc, insn_size_t *result_opcode, int from_user_mode) -{ - int get_user_error; - unsigned long aligned_pc; - insn_size_t opcode; - - if ((pc & 3) == 1) { - /* SHmedia */ - aligned_pc = pc & ~3; - if (from_user_mode) { - if (!access_ok(aligned_pc, sizeof(insn_size_t))) { - get_user_error = -EFAULT; - } else { - get_user_error = __get_user(opcode, (insn_size_t *)aligned_pc); - *result_opcode = opcode; - } - return get_user_error; - } else { - /* If the fault was in the kernel, we can either read - * this directly, or if not, we fault. - */ - *result_opcode = *(insn_size_t *)aligned_pc; - return 0; - } - } else if ((pc & 1) == 0) { - /* SHcompact */ - /* TODO : provide handling for this. We don't really support - user-mode SHcompact yet, and for a kernel fault, this would - have to come from a module built for SHcompact. */ - return -EFAULT; - } else { - /* misaligned */ - return -EFAULT; - } -} - -static int address_is_sign_extended(__u64 a) -{ - __u64 b; -#if (NEFF == 32) - b = (__u64)(__s64)(__s32)(a & 0xffffffffUL); - return (b == a) ? 1 : 0; -#else -#error "Sign extend check only works for NEFF==32" -#endif -} - -/* return -1 for fault, 0 for OK */ -static int generate_and_check_address(struct pt_regs *regs, - insn_size_t opcode, - int displacement_not_indexed, - int width_shift, - __u64 *address) -{ - __u64 base_address, addr; - int basereg; - - switch (1 << width_shift) { - case 1: inc_unaligned_byte_access(); break; - case 2: inc_unaligned_word_access(); break; - case 4: inc_unaligned_dword_access(); break; - case 8: inc_unaligned_multi_access(); break; - } - - basereg = (opcode >> 20) & 0x3f; - base_address = regs->regs[basereg]; - if (displacement_not_indexed) { - __s64 displacement; - displacement = (opcode >> 10) & 0x3ff; - displacement = sign_extend64(displacement, 9); - addr = (__u64)((__s64)base_address + (displacement << width_shift)); - } else { - __u64 offset; - int offsetreg; - offsetreg = (opcode >> 10) & 0x3f; - offset = regs->regs[offsetreg]; - addr = base_address + offset; - } - - /* Check sign extended */ - if (!address_is_sign_extended(addr)) - return -1; - - /* Check accessible. For misaligned access in the kernel, assume the - address is always accessible (and if not, just fault when the - load/store gets done.) */ - if (user_mode(regs)) { - inc_unaligned_user_access(); - - if (addr >= TASK_SIZE) - return -1; - } else - inc_unaligned_kernel_access(); - - *address = addr; - - perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, addr); - unaligned_fixups_notify(current, opcode, regs); - - return 0; -} - -static void misaligned_kernel_word_load(__u64 address, int do_sign_extend, __u64 *result) -{ - unsigned short x; - unsigned char *p, *q; - p = (unsigned char *) (int) address; - q = (unsigned char *) &x; - q[0] = p[0]; - q[1] = p[1]; - - if (do_sign_extend) { - *result = (__u64)(__s64) *(short *) &x; - } else { - *result = (__u64) x; - } -} - -static void misaligned_kernel_word_store(__u64 address, __u64 value) -{ - unsigned short x; - unsigned char *p, *q; - p = (unsigned char *) (int) address; - q = (unsigned char *) &x; - - x = (__u16) value; - p[0] = q[0]; - p[1] = q[1]; -} - -static int misaligned_load(struct pt_regs *regs, - insn_size_t opcode, - int displacement_not_indexed, - int width_shift, - int do_sign_extend) -{ - /* Return -1 for a fault, 0 for OK */ - int error; - int destreg; - __u64 address; - - error = generate_and_check_address(regs, opcode, - displacement_not_indexed, width_shift, &address); - if (error < 0) - return error; - - destreg = (opcode >> 4) & 0x3f; - if (user_mode(regs)) { - __u64 buffer; - - if (!access_ok((unsigned long) address, 1UL<<width_shift)) { - return -1; - } - - if (__copy_user(&buffer, (const void *)(int)address, (1 << width_shift)) > 0) { - return -1; /* fault */ - } - switch (width_shift) { - case 1: - if (do_sign_extend) { - regs->regs[destreg] = (__u64)(__s64) *(__s16 *) &buffer; - } else { - regs->regs[destreg] = (__u64) *(__u16 *) &buffer; - } - break; - case 2: - regs->regs[destreg] = (__u64)(__s64) *(__s32 *) &buffer; - break; - case 3: - regs->regs[destreg] = buffer; - break; - default: - printk("Unexpected width_shift %d in misaligned_load, PC=%08lx\n", - width_shift, (unsigned long) regs->pc); - break; - } - } else { - /* kernel mode - we can take short cuts since if we fault, it's a genuine bug */ - __u64 lo, hi; - - switch (width_shift) { - case 1: - misaligned_kernel_word_load(address, do_sign_extend, ®s->regs[destreg]); - break; - case 2: - asm ("ldlo.l %1, 0, %0" : "=r" (lo) : "r" (address)); - asm ("ldhi.l %1, 3, %0" : "=r" (hi) : "r" (address)); - regs->regs[destreg] = lo | hi; - break; - case 3: - asm ("ldlo.q %1, 0, %0" : "=r" (lo) : "r" (address)); - asm ("ldhi.q %1, 7, %0" : "=r" (hi) : "r" (address)); - regs->regs[destreg] = lo | hi; - break; - - default: - printk("Unexpected width_shift %d in misaligned_load, PC=%08lx\n", - width_shift, (unsigned long) regs->pc); - break; - } - } - - return 0; -} - -static int misaligned_store(struct pt_regs *regs, - insn_size_t opcode, - int displacement_not_indexed, - int width_shift) -{ - /* Return -1 for a fault, 0 for OK */ - int error; - int srcreg; - __u64 address; - - error = generate_and_check_address(regs, opcode, - displacement_not_indexed, width_shift, &address); - if (error < 0) - return error; - - srcreg = (opcode >> 4) & 0x3f; - if (user_mode(regs)) { - __u64 buffer; - - if (!access_ok((unsigned long) address, 1UL<<width_shift)) { - return -1; - } - - switch (width_shift) { - case 1: - *(__u16 *) &buffer = (__u16) regs->regs[srcreg]; - break; - case 2: - *(__u32 *) &buffer = (__u32) regs->regs[srcreg]; - break; - case 3: - buffer = regs->regs[srcreg]; - break; - default: - printk("Unexpected width_shift %d in misaligned_store, PC=%08lx\n", - width_shift, (unsigned long) regs->pc); - break; - } - - if (__copy_user((void *)(int)address, &buffer, (1 << width_shift)) > 0) { - return -1; /* fault */ - } - } else { - /* kernel mode - we can take short cuts since if we fault, it's a genuine bug */ - __u64 val = regs->regs[srcreg]; - - switch (width_shift) { - case 1: - misaligned_kernel_word_store(address, val); - break; - case 2: - asm ("stlo.l %1, 0, %0" : : "r" (val), "r" (address)); - asm ("sthi.l %1, 3, %0" : : "r" (val), "r" (address)); - break; - case 3: - asm ("stlo.q %1, 0, %0" : : "r" (val), "r" (address)); - asm ("sthi.q %1, 7, %0" : : "r" (val), "r" (address)); - break; - - default: - printk("Unexpected width_shift %d in misaligned_store, PC=%08lx\n", - width_shift, (unsigned long) regs->pc); - break; - } - } - - return 0; -} - -/* Never need to fix up misaligned FPU accesses within the kernel since that's a real - error. */ -static int misaligned_fpu_load(struct pt_regs *regs, - insn_size_t opcode, - int displacement_not_indexed, - int width_shift, - int do_paired_load) -{ - /* Return -1 for a fault, 0 for OK */ - int error; - int destreg; - __u64 address; - - error = generate_and_check_address(regs, opcode, - displacement_not_indexed, width_shift, &address); - if (error < 0) - return error; - - destreg = (opcode >> 4) & 0x3f; - if (user_mode(regs)) { - __u64 buffer; - __u32 buflo, bufhi; - - if (!access_ok((unsigned long) address, 1UL<<width_shift)) { - return -1; - } - - if (__copy_user(&buffer, (const void *)(int)address, (1 << width_shift)) > 0) { - return -1; /* fault */ - } - /* 'current' may be the current owner of the FPU state, so - context switch the registers into memory so they can be - indexed by register number. */ - if (last_task_used_math == current) { - enable_fpu(); - save_fpu(current); - disable_fpu(); - last_task_used_math = NULL; - regs->sr |= SR_FD; - } - - buflo = *(__u32*) &buffer; - bufhi = *(1 + (__u32*) &buffer); - - switch (width_shift) { - case 2: - current->thread.xstate->hardfpu.fp_regs[destreg] = buflo; - break; - case 3: - if (do_paired_load) { - current->thread.xstate->hardfpu.fp_regs[destreg] = buflo; - current->thread.xstate->hardfpu.fp_regs[destreg+1] = bufhi; - } else { -#if defined(CONFIG_CPU_LITTLE_ENDIAN) - current->thread.xstate->hardfpu.fp_regs[destreg] = bufhi; - current->thread.xstate->hardfpu.fp_regs[destreg+1] = buflo; -#else - current->thread.xstate->hardfpu.fp_regs[destreg] = buflo; - current->thread.xstate->hardfpu.fp_regs[destreg+1] = bufhi; -#endif - } - break; - default: - printk("Unexpected width_shift %d in misaligned_fpu_load, PC=%08lx\n", - width_shift, (unsigned long) regs->pc); - break; - } - return 0; - } else { - die ("Misaligned FPU load inside kernel", regs, 0); - return -1; - } -} - -static int misaligned_fpu_store(struct pt_regs *regs, - insn_size_t opcode, - int displacement_not_indexed, - int width_shift, - int do_paired_load) -{ - /* Return -1 for a fault, 0 for OK */ - int error; - int srcreg; - __u64 address; - - error = generate_and_check_address(regs, opcode, - displacement_not_indexed, width_shift, &address); - if (error < 0) - return error; - - srcreg = (opcode >> 4) & 0x3f; - if (user_mode(regs)) { - __u64 buffer; - /* Initialise these to NaNs. */ - __u32 buflo=0xffffffffUL, bufhi=0xffffffffUL; - - if (!access_ok((unsigned long) address, 1UL<<width_shift)) { - return -1; - } - - /* 'current' may be the current owner of the FPU state, so - context switch the registers into memory so they can be - indexed by register number. */ - if (last_task_used_math == current) { - enable_fpu(); - save_fpu(current); - disable_fpu(); - last_task_used_math = NULL; - regs->sr |= SR_FD; - } - - switch (width_shift) { - case 2: - buflo = current->thread.xstate->hardfpu.fp_regs[srcreg]; - break; - case 3: - if (do_paired_load) { - buflo = current->thread.xstate->hardfpu.fp_regs[srcreg]; - bufhi = current->thread.xstate->hardfpu.fp_regs[srcreg+1]; - } else { -#if defined(CONFIG_CPU_LITTLE_ENDIAN) - bufhi = current->thread.xstate->hardfpu.fp_regs[srcreg]; - buflo = current->thread.xstate->hardfpu.fp_regs[srcreg+1]; -#else - buflo = current->thread.xstate->hardfpu.fp_regs[srcreg]; - bufhi = current->thread.xstate->hardfpu.fp_regs[srcreg+1]; -#endif - } - break; - default: - printk("Unexpected width_shift %d in misaligned_fpu_store, PC=%08lx\n", - width_shift, (unsigned long) regs->pc); - break; - } - - *(__u32*) &buffer = buflo; - *(1 + (__u32*) &buffer) = bufhi; - if (__copy_user((void *)(int)address, &buffer, (1 << width_shift)) > 0) { - return -1; /* fault */ - } - return 0; - } else { - die ("Misaligned FPU load inside kernel", regs, 0); - return -1; - } -} - -static int misaligned_fixup(struct pt_regs *regs) -{ - insn_size_t opcode; - int error; - int major, minor; - unsigned int user_action; - - user_action = unaligned_user_action(); - if (!(user_action & UM_FIXUP)) - return -1; - - error = read_opcode(regs->pc, &opcode, user_mode(regs)); - if (error < 0) { - return error; - } - major = (opcode >> 26) & 0x3f; - minor = (opcode >> 16) & 0xf; - - switch (major) { - case (0x84>>2): /* LD.W */ - error = misaligned_load(regs, opcode, 1, 1, 1); - break; - case (0xb0>>2): /* LD.UW */ - error = misaligned_load(regs, opcode, 1, 1, 0); - break; - case (0x88>>2): /* LD.L */ - error = misaligned_load(regs, opcode, 1, 2, 1); - break; - case (0x8c>>2): /* LD.Q */ - error = misaligned_load(regs, opcode, 1, 3, 0); - break; - - case (0xa4>>2): /* ST.W */ - error = misaligned_store(regs, opcode, 1, 1); - break; - case (0xa8>>2): /* ST.L */ - error = misaligned_store(regs, opcode, 1, 2); - break; - case (0xac>>2): /* ST.Q */ - error = misaligned_store(regs, opcode, 1, 3); - break; - - case (0x40>>2): /* indexed loads */ - switch (minor) { - case 0x1: /* LDX.W */ - error = misaligned_load(regs, opcode, 0, 1, 1); - break; - case 0x5: /* LDX.UW */ - error = misaligned_load(regs, opcode, 0, 1, 0); - break; - case 0x2: /* LDX.L */ - error = misaligned_load(regs, opcode, 0, 2, 1); - break; - case 0x3: /* LDX.Q */ - error = misaligned_load(regs, opcode, 0, 3, 0); - break; - default: - error = -1; - break; - } - break; - - case (0x60>>2): /* indexed stores */ - switch (minor) { - case 0x1: /* STX.W */ - error = misaligned_store(regs, opcode, 0, 1); - break; - case 0x2: /* STX.L */ - error = misaligned_store(regs, opcode, 0, 2); - break; - case 0x3: /* STX.Q */ - error = misaligned_store(regs, opcode, 0, 3); - break; - default: - error = -1; - break; - } - break; - - case (0x94>>2): /* FLD.S */ - error = misaligned_fpu_load(regs, opcode, 1, 2, 0); - break; - case (0x98>>2): /* FLD.P */ - error = misaligned_fpu_load(regs, opcode, 1, 3, 1); - break; - case (0x9c>>2): /* FLD.D */ - error = misaligned_fpu_load(regs, opcode, 1, 3, 0); - break; - case (0x1c>>2): /* floating indexed loads */ - switch (minor) { - case 0x8: /* FLDX.S */ - error = misaligned_fpu_load(regs, opcode, 0, 2, 0); - break; - case 0xd: /* FLDX.P */ - error = misaligned_fpu_load(regs, opcode, 0, 3, 1); - break; - case 0x9: /* FLDX.D */ - error = misaligned_fpu_load(regs, opcode, 0, 3, 0); - break; - default: - error = -1; - break; - } - break; - case (0xb4>>2): /* FLD.S */ - error = misaligned_fpu_store(regs, opcode, 1, 2, 0); - break; - case (0xb8>>2): /* FLD.P */ - error = misaligned_fpu_store(regs, opcode, 1, 3, 1); - break; - case (0xbc>>2): /* FLD.D */ - error = misaligned_fpu_store(regs, opcode, 1, 3, 0); - break; - case (0x3c>>2): /* floating indexed stores */ - switch (minor) { - case 0x8: /* FSTX.S */ - error = misaligned_fpu_store(regs, opcode, 0, 2, 0); - break; - case 0xd: /* FSTX.P */ - error = misaligned_fpu_store(regs, opcode, 0, 3, 1); - break; - case 0x9: /* FSTX.D */ - error = misaligned_fpu_store(regs, opcode, 0, 3, 0); - break; - default: - error = -1; - break; - } - break; - - default: - /* Fault */ - error = -1; - break; - } - - if (error < 0) { - return error; - } else { - regs->pc += 4; /* Skip the instruction that's just been emulated */ - return 0; - } -} - -static void do_unhandled_exception(int signr, char *str, unsigned long error, - struct pt_regs *regs) -{ - if (user_mode(regs)) - force_sig(signr); - - die_if_no_fixup(str, regs, error); -} - -#define DO_ERROR(signr, str, name) \ -asmlinkage void do_##name(unsigned long error_code, struct pt_regs *regs) \ -{ \ - do_unhandled_exception(signr, str, error_code, regs); \ -} - -DO_ERROR(SIGILL, "illegal slot instruction", illegal_slot_inst) -DO_ERROR(SIGSEGV, "address error (exec)", address_error_exec) - -#if defined(CONFIG_SH64_ID2815_WORKAROUND) - -#define OPCODE_INVALID 0 -#define OPCODE_USER_VALID 1 -#define OPCODE_PRIV_VALID 2 - -/* getcon/putcon - requires checking which control register is referenced. */ -#define OPCODE_CTRL_REG 3 - -/* Table of valid opcodes for SHmedia mode. - Form a 10-bit value by concatenating the major/minor opcodes i.e. - opcode[31:26,20:16]. The 6 MSBs of this value index into the following - array. The 4 LSBs select the bit-pair in the entry (bits 1:0 correspond to - LSBs==4'b0000 etc). */ -static unsigned long shmedia_opcode_table[64] = { - 0x55554044,0x54445055,0x15141514,0x14541414,0x00000000,0x10001000,0x01110055,0x04050015, - 0x00000444,0xc0000000,0x44545515,0x40405555,0x55550015,0x10005555,0x55555505,0x04050000, - 0x00000555,0x00000404,0x00040445,0x15151414,0x00000000,0x00000000,0x00000000,0x00000000, - 0x00000055,0x40404444,0x00000404,0xc0009495,0x00000000,0x00000000,0x00000000,0x00000000, - 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555, - 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555, - 0x80005050,0x04005055,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555, - 0x81055554,0x00000404,0x55555555,0x55555555,0x00000000,0x00000000,0x00000000,0x00000000 -}; - -/* Workaround SH5-101 cut2 silicon defect #2815 : - in some situations, inter-mode branches from SHcompact -> SHmedia - which should take ITLBMISS or EXECPROT exceptions at the target - falsely take RESINST at the target instead. */ -void do_reserved_inst(unsigned long error_code, struct pt_regs *regs) -{ - insn_size_t opcode = 0x6ff4fff0; /* guaranteed reserved opcode */ - unsigned long pc, aligned_pc; - unsigned long index, shift; - unsigned long major, minor, combined; - unsigned long reserved_field; - int opcode_state; - int get_user_error; - int signr = SIGILL; - char *exception_name = "reserved_instruction"; - - pc = regs->pc; - - /* SHcompact is not handled */ - if (unlikely((pc & 3) == 0)) - goto out; - - /* SHmedia : check for defect. This requires executable vmas - to be readable too. */ - aligned_pc = pc & ~3; - if (!access_ok(aligned_pc, sizeof(insn_size_t))) - get_user_error = -EFAULT; - else - get_user_error = __get_user(opcode, (insn_size_t *)aligned_pc); - - if (get_user_error < 0) { - /* - * Error trying to read opcode. This typically means a - * real fault, not a RESINST any more. So change the - * codes. - */ - exception_name = "address error (exec)"; - signr = SIGSEGV; - goto out; - } - - /* These bits are currently reserved as zero in all valid opcodes */ - reserved_field = opcode & 0xf; - if (unlikely(reserved_field)) - goto out; /* invalid opcode */ - - major = (opcode >> 26) & 0x3f; - minor = (opcode >> 16) & 0xf; - combined = (major << 4) | minor; - index = major; - shift = minor << 1; - opcode_state = (shmedia_opcode_table[index] >> shift) & 0x3; - switch (opcode_state) { - case OPCODE_INVALID: - /* Trap. */ - break; - case OPCODE_USER_VALID: - /* - * Restart the instruction: the branch to the instruction - * will now be from an RTE not from SHcompact so the - * silicon defect won't be triggered. - */ - return; - case OPCODE_PRIV_VALID: - if (!user_mode(regs)) { - /* - * Should only ever get here if a module has - * SHcompact code inside it. If so, the same fix - * up is needed. - */ - return; /* same reason */ - } - - /* - * Otherwise, user mode trying to execute a privileged - * instruction - fall through to trap. - */ - break; - case OPCODE_CTRL_REG: - /* If in privileged mode, return as above. */ - if (!user_mode(regs)) - return; - - /* In user mode ... */ - if (combined == 0x9f) { /* GETCON */ - unsigned long regno = (opcode >> 20) & 0x3f; - - if (regno >= 62) - return; - - /* reserved/privileged control register => trap */ - } else if (combined == 0x1bf) { /* PUTCON */ - unsigned long regno = (opcode >> 4) & 0x3f; - - if (regno >= 62) - return; - - /* reserved/privileged control register => trap */ - } - - break; - default: - /* Fall through to trap. */ - break; - } - -out: - do_unhandled_exception(signr, exception_name, error_code, regs); -} - -#else /* CONFIG_SH64_ID2815_WORKAROUND */ - -/* If the workaround isn't needed, this is just a straightforward reserved - instruction */ -DO_ERROR(SIGILL, "reserved instruction", reserved_inst) - -#endif /* CONFIG_SH64_ID2815_WORKAROUND */ - -/* Called with interrupts disabled */ -asmlinkage void do_exception_error(unsigned long ex, struct pt_regs *regs) -{ - die_if_kernel("exception", regs, ex); -} - -asmlinkage int do_unknown_trapa(unsigned long scId, struct pt_regs *regs) -{ - /* Syscall debug */ - printk("System call ID error: [0x1#args:8 #syscall:16 0x%lx]\n", scId); - - die_if_kernel("unknown trapa", regs, scId); - - return -ENOSYS; -} - -/* Implement misaligned load/store handling for kernel (and optionally for user - mode too). Limitation : only SHmedia mode code is handled - there is no - handling at all for misaligned accesses occurring in SHcompact code yet. */ - -asmlinkage void do_address_error_load(unsigned long error_code, struct pt_regs *regs) -{ - if (misaligned_fixup(regs) < 0) - do_unhandled_exception(SIGSEGV, "address error(load)", - error_code, regs); -} - -asmlinkage void do_address_error_store(unsigned long error_code, struct pt_regs *regs) -{ - if (misaligned_fixup(regs) < 0) - do_unhandled_exception(SIGSEGV, "address error(store)", - error_code, regs); -} - -asmlinkage void do_debug_interrupt(unsigned long code, struct pt_regs *regs) -{ - u64 peek_real_address_q(u64 addr); - u64 poke_real_address_q(u64 addr, u64 val); - unsigned long long DM_EXP_CAUSE_PHY = 0x0c100010; - unsigned long long exp_cause; - /* It's not worth ioremapping the debug module registers for the amount - of access we make to them - just go direct to their physical - addresses. */ - exp_cause = peek_real_address_q(DM_EXP_CAUSE_PHY); - if (exp_cause & ~4) - printk("DM.EXP_CAUSE had unexpected bits set (=%08lx)\n", - (unsigned long)(exp_cause & 0xffffffff)); - show_state(); - /* Clear all DEBUGINT causes */ - poke_real_address_q(DM_EXP_CAUSE_PHY, 0x0); -} - -void per_cpu_trap_init(void) -{ - /* Nothing to do for now, VBR initialization later. */ -} diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S index c60b19958c35..bde7a6c01aaf 100644 --- a/arch/sh/kernel/vmlinux.lds.S +++ b/arch/sh/kernel/vmlinux.lds.S @@ -3,14 +3,7 @@ * ld script to make SuperH Linux kernel * Written by Niibe Yutaka and Paul Mundt */ -#ifdef CONFIG_SUPERH64 -#define LOAD_OFFSET PAGE_OFFSET -OUTPUT_ARCH(sh:sh5) -#else -#define LOAD_OFFSET 0 OUTPUT_ARCH(sh) -#endif - #include <asm/thread_info.h> #include <asm/cache.h> #include <asm/vmlinux.lds.h> @@ -28,14 +21,13 @@ SECTIONS _text = .; /* Text and read-only data */ - .empty_zero_page : AT(ADDR(.empty_zero_page) - LOAD_OFFSET) { + .empty_zero_page : AT(ADDR(.empty_zero_page)) { *(.empty_zero_page) } = 0 - .text : AT(ADDR(.text) - LOAD_OFFSET) { + .text : AT(ADDR(.text)) { HEAD_TEXT TEXT_TEXT - EXTRA_TEXT SCHED_TEXT CPUIDLE_TEXT LOCK_TEXT @@ -62,7 +54,7 @@ SECTIONS INIT_DATA_SECTION(16) . = ALIGN(4); - .machvec.init : AT(ADDR(.machvec.init) - LOAD_OFFSET) { + .machvec.init : AT(ADDR(.machvec.init)) { __machvec_start = .; *(.machvec.init) __machvec_end = .; @@ -74,8 +66,8 @@ SECTIONS * .exit.text is discarded at runtime, not link time, to deal with * references from __bug_table */ - .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { EXIT_TEXT } - .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { EXIT_DATA } + .exit.text : AT(ADDR(.exit.text)) { EXIT_TEXT } + .exit.data : AT(ADDR(.exit.data)) { EXIT_DATA } . = ALIGN(PAGE_SIZE); __init_end = .; |