diff options
Diffstat (limited to 'arch/powerpc/kernel')
28 files changed, 1731 insertions, 1460 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index a2c683403c2b..a7def5f90cad 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -36,7 +36,7 @@ obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \ firmware.o nvram_64.o obj64-$(CONFIG_RELOCATABLE) += reloc_64.o obj-$(CONFIG_PPC64) += vdso64/ -obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o +obj-$(CONFIG_ALTIVEC) += vecemu.o obj-$(CONFIG_PPC_970_NAP) += idle_power4.o obj-$(CONFIG_PPC_OF) += of_device.o of_platform.o prom_parse.o obj-$(CONFIG_PPC_CLOCK) += clock.o @@ -82,6 +82,7 @@ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_KPROBES) += kprobes.o obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o obj-$(CONFIG_STACKTRACE) += stacktrace.o +obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o pci64-$(CONFIG_PPC64) += pci_dn.o isa-bridge.o obj-$(CONFIG_PCI) += pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \ @@ -111,6 +112,7 @@ obj-y += ppc_save_regs.o endif extra-$(CONFIG_PPC_FPU) += fpu.o +extra-$(CONFIG_ALTIVEC) += vector.o extra-$(CONFIG_PPC64) += entry_64.o extra-y += systbl_chk.i diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c index 5ffcfaa77d6a..a5b632e52fae 100644 --- a/arch/powerpc/kernel/align.c +++ b/arch/powerpc/kernel/align.c @@ -24,6 +24,7 @@ #include <asm/system.h> #include <asm/cache.h> #include <asm/cputable.h> +#include <asm/emulated_ops.h> struct aligninfo { unsigned char len; @@ -730,8 +731,10 @@ int fix_alignment(struct pt_regs *regs) areg = dsisr & 0x1f; /* register to update */ #ifdef CONFIG_SPE - if ((instr >> 26) == 0x4) + if ((instr >> 26) == 0x4) { + PPC_WARN_EMULATED(spe); return emulate_spe(regs, reg, instr); + } #endif instr = (dsisr >> 10) & 0x7f; @@ -783,23 +786,28 @@ int fix_alignment(struct pt_regs *regs) flags |= SPLT; nb = 8; } + PPC_WARN_EMULATED(vsx); return emulate_vsx(addr, reg, areg, regs, flags, nb); } #endif /* A size of 0 indicates an instruction we don't support, with * the exception of DCBZ which is handled as a special case here */ - if (instr == DCBZ) + if (instr == DCBZ) { + PPC_WARN_EMULATED(dcbz); return emulate_dcbz(regs, addr); + } if (unlikely(nb == 0)) return 0; /* Load/Store Multiple instructions are handled in their own * function */ - if (flags & M) + if (flags & M) { + PPC_WARN_EMULATED(multiple); return emulate_multiple(regs, addr, reg, nb, flags, instr, swiz); + } /* Verify the address of the operand */ if (unlikely(user_mode(regs) && @@ -816,8 +824,12 @@ int fix_alignment(struct pt_regs *regs) } /* Special case for 16-byte FP loads and stores */ - if (nb == 16) + if (nb == 16) { + PPC_WARN_EMULATED(fp_pair); return emulate_fp_pair(addr, reg, flags); + } + + PPC_WARN_EMULATED(unaligned); /* If we are loading, get the data from user space, else * get it from register values diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index e981d1ce1914..561b64652311 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -122,8 +122,6 @@ int main(void) DEFINE(PACAKSAVE, offsetof(struct paca_struct, kstack)); DEFINE(PACACURRENT, offsetof(struct paca_struct, __current)); DEFINE(PACASAVEDMSR, offsetof(struct paca_struct, saved_msr)); - DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real)); - DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr)); DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr)); DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1)); DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc)); @@ -132,35 +130,30 @@ int main(void) DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled)); DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled)); DEFINE(PACAPERFPEND, offsetof(struct paca_struct, perf_counter_pending)); - DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache)); - DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr)); DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id)); - DEFINE(PACAVMALLOCSLLP, offsetof(struct paca_struct, vmalloc_sllp)); #ifdef CONFIG_PPC_MM_SLICES DEFINE(PACALOWSLICESPSIZE, offsetof(struct paca_struct, context.low_slices_psize)); DEFINE(PACAHIGHSLICEPSIZE, offsetof(struct paca_struct, context.high_slices_psize)); DEFINE(MMUPSIZEDEFSIZE, sizeof(struct mmu_psize_def)); +#endif /* CONFIG_PPC_MM_SLICES */ +#ifdef CONFIG_PPC_STD_MMU_64 + DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real)); + DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr)); + DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache)); + DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr)); + DEFINE(PACAVMALLOCSLLP, offsetof(struct paca_struct, vmalloc_sllp)); +#ifdef CONFIG_PPC_MM_SLICES DEFINE(MMUPSIZESLLP, offsetof(struct mmu_psize_def, sllp)); #else DEFINE(PACACONTEXTSLLP, offsetof(struct paca_struct, context.sllp)); - #endif /* CONFIG_PPC_MM_SLICES */ DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen)); DEFINE(PACA_EXMC, offsetof(struct paca_struct, exmc)); DEFINE(PACA_EXSLB, offsetof(struct paca_struct, exslb)); - DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp)); DEFINE(PACALPPACAPTR, offsetof(struct paca_struct, lppaca_ptr)); - DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id)); - DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr)); - DEFINE(PACA_STARTSPURR, offsetof(struct paca_struct, startspurr)); - DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time)); - DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time)); DEFINE(PACA_SLBSHADOWPTR, offsetof(struct paca_struct, slb_shadow_ptr)); - DEFINE(PACA_DATA_OFFSET, offsetof(struct paca_struct, data_offset)); - DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save)); - DEFINE(SLBSHADOW_STACKVSID, offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].vsid)); DEFINE(SLBSHADOW_STACKESID, @@ -170,6 +163,15 @@ int main(void) DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int)); DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int)); DEFINE(SLBSHADOW_SAVEAREA, offsetof(struct slb_shadow, save_area)); +#endif /* CONFIG_PPC_STD_MMU_64 */ + DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp)); + DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id)); + DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr)); + DEFINE(PACA_STARTSPURR, offsetof(struct paca_struct, startspurr)); + DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time)); + DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time)); + DEFINE(PACA_DATA_OFFSET, offsetof(struct paca_struct, data_offset)); + DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save)); #endif /* CONFIG_PPC64 */ /* RTAS */ diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index 3e33fb933d99..4a24a2fc4574 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -427,7 +427,8 @@ static struct cpu_spec __initdata cpu_specs[] = { .cpu_name = "POWER7 (architected)", .cpu_features = CPU_FTRS_POWER7, .cpu_user_features = COMMON_USER_POWER7, - .mmu_features = MMU_FTR_HPTE_TABLE, + .mmu_features = MMU_FTR_HPTE_TABLE | + MMU_FTR_TLBIE_206, .icache_bsize = 128, .dcache_bsize = 128, .machine_check = machine_check_generic, @@ -441,7 +442,8 @@ static struct cpu_spec __initdata cpu_specs[] = { .cpu_name = "POWER7 (raw)", .cpu_features = CPU_FTRS_POWER7, .cpu_user_features = COMMON_USER_POWER7, - .mmu_features = MMU_FTR_HPTE_TABLE, + .mmu_features = MMU_FTR_HPTE_TABLE | + MMU_FTR_TLBIE_206, .icache_bsize = 128, .dcache_bsize = 128, .num_pmcs = 6, diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c new file mode 100644 index 000000000000..68ccf11e4f19 --- /dev/null +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -0,0 +1,163 @@ +/* + * Contains routines needed to support swiotlb for ppc. + * + * Copyright (C) 2009 Becky Bruce, Freescale Semiconductor + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/dma-mapping.h> +#include <linux/pfn.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/pci.h> + +#include <asm/machdep.h> +#include <asm/swiotlb.h> +#include <asm/dma.h> +#include <asm/abs_addr.h> + +int swiotlb __read_mostly; +unsigned int ppc_swiotlb_enable; + +void *swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t addr) +{ + unsigned long pfn = PFN_DOWN(swiotlb_bus_to_phys(hwdev, addr)); + void *pageaddr = page_address(pfn_to_page(pfn)); + + if (pageaddr != NULL) + return pageaddr + (addr % PAGE_SIZE); + return NULL; +} + +dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr) +{ + return paddr + get_dma_direct_offset(hwdev); +} + +phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr) + +{ + return baddr - get_dma_direct_offset(hwdev); +} + +/* + * Determine if an address needs bounce buffering via swiotlb. + * Going forward I expect the swiotlb code to generalize on using + * a dma_ops->addr_needs_map, and this function will move from here to the + * generic swiotlb code. + */ +int +swiotlb_arch_address_needs_mapping(struct device *hwdev, dma_addr_t addr, + size_t size) +{ + struct dma_mapping_ops *dma_ops = get_dma_ops(hwdev); + + BUG_ON(!dma_ops); + return dma_ops->addr_needs_map(hwdev, addr, size); +} + +/* + * Determine if an address is reachable by a pci device, or if we must bounce. + */ +static int +swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) +{ + u64 mask = dma_get_mask(hwdev); + dma_addr_t max; + struct pci_controller *hose; + struct pci_dev *pdev = to_pci_dev(hwdev); + + hose = pci_bus_to_host(pdev->bus); + max = hose->dma_window_base_cur + hose->dma_window_size; + + /* check that we're within mapped pci window space */ + if ((addr + size > max) | (addr < hose->dma_window_base_cur)) + return 1; + + return !is_buffer_dma_capable(mask, addr, size); +} + +static int +swiotlb_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) +{ + return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size); +} + + +/* + * At the moment, all platforms that use this code only require + * swiotlb to be used if we're operating on HIGHMEM. Since + * we don't ever call anything other than map_sg, unmap_sg, + * map_page, and unmap_page on highmem, use normal dma_ops + * for everything else. + */ +struct dma_mapping_ops swiotlb_dma_ops = { + .alloc_coherent = dma_direct_alloc_coherent, + .free_coherent = dma_direct_free_coherent, + .map_sg = swiotlb_map_sg_attrs, + .unmap_sg = swiotlb_unmap_sg_attrs, + .dma_supported = swiotlb_dma_supported, + .map_page = swiotlb_map_page, + .unmap_page = swiotlb_unmap_page, + .addr_needs_map = swiotlb_addr_needs_map, + .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, + .sync_single_range_for_device = swiotlb_sync_single_range_for_device, + .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, + .sync_sg_for_device = swiotlb_sync_sg_for_device +}; + +struct dma_mapping_ops swiotlb_pci_dma_ops = { + .alloc_coherent = dma_direct_alloc_coherent, + .free_coherent = dma_direct_free_coherent, + .map_sg = swiotlb_map_sg_attrs, + .unmap_sg = swiotlb_unmap_sg_attrs, + .dma_supported = swiotlb_dma_supported, + .map_page = swiotlb_map_page, + .unmap_page = swiotlb_unmap_page, + .addr_needs_map = swiotlb_pci_addr_needs_map, + .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, + .sync_single_range_for_device = swiotlb_sync_single_range_for_device, + .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, + .sync_sg_for_device = swiotlb_sync_sg_for_device +}; + +static int ppc_swiotlb_bus_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + + /* We are only intereted in device addition */ + if (action != BUS_NOTIFY_ADD_DEVICE) + return 0; + + /* May need to bounce if the device can't address all of DRAM */ + if (dma_get_mask(dev) < lmb_end_of_DRAM()) + set_dma_ops(dev, &swiotlb_dma_ops); + + return NOTIFY_DONE; +} + +static struct notifier_block ppc_swiotlb_plat_bus_notifier = { + .notifier_call = ppc_swiotlb_bus_notify, + .priority = 0, +}; + +static struct notifier_block ppc_swiotlb_of_bus_notifier = { + .notifier_call = ppc_swiotlb_bus_notify, + .priority = 0, +}; + +int __init swiotlb_setup_bus_notifier(void) +{ + bus_register_notifier(&platform_bus_type, + &ppc_swiotlb_plat_bus_notifier); + bus_register_notifier(&of_platform_bus_type, + &ppc_swiotlb_of_bus_notifier); + + return 0; +} diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c index 6b02793dc75b..20a60d661ba8 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -19,7 +19,7 @@ * default the offset is PCI_DRAM_OFFSET. */ -static unsigned long get_dma_direct_offset(struct device *dev) +unsigned long get_dma_direct_offset(struct device *dev) { if (dev) return (unsigned long)dev->archdata.dma_data; diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S new file mode 100644 index 000000000000..eb898112e577 --- /dev/null +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -0,0 +1,978 @@ +/* + * This file contains the 64-bit "server" PowerPC variant + * of the low level exception handling including exception + * vectors, exception return, part of the slb and stab + * handling and other fixed offset specific things. + * + * This file is meant to be #included from head_64.S due to + * position dependant assembly. + * + * Most of this originates from head_64.S and thus has the same + * copyright history. + * + */ + +/* + * We layout physical memory as follows: + * 0x0000 - 0x00ff : Secondary processor spin code + * 0x0100 - 0x2fff : pSeries Interrupt prologs + * 0x3000 - 0x5fff : interrupt support, iSeries and common interrupt prologs + * 0x6000 - 0x6fff : Initial (CPU0) segment table + * 0x7000 - 0x7fff : FWNMI data area + * 0x8000 - : Early init and support code + */ + + +/* + * SPRG Usage + * + * Register Definition + * + * SPRG0 reserved for hypervisor + * SPRG1 temp - used to save gpr + * SPRG2 temp - used to save gpr + * SPRG3 virt addr of paca + */ + +/* + * This is the start of the interrupt handlers for pSeries + * This code runs with relocation off. + * Code from here to __end_interrupts gets copied down to real + * address 0x100 when we are running a relocatable kernel. + * Therefore any relative branches in this section must only + * branch to labels in this section. + */ + . = 0x100 + .globl __start_interrupts +__start_interrupts: + + STD_EXCEPTION_PSERIES(0x100, system_reset) + + . = 0x200 +_machine_check_pSeries: + HMT_MEDIUM + mtspr SPRN_SPRG1,r13 /* save r13 */ + EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common) + + . = 0x300 + .globl data_access_pSeries +data_access_pSeries: + HMT_MEDIUM + mtspr SPRN_SPRG1,r13 +BEGIN_FTR_SECTION + mtspr SPRN_SPRG2,r12 + mfspr r13,SPRN_DAR + mfspr r12,SPRN_DSISR + srdi r13,r13,60 + rlwimi r13,r12,16,0x20 + mfcr r12 + cmpwi r13,0x2c + beq do_stab_bolted_pSeries + mtcrf 0x80,r12 + mfspr r12,SPRN_SPRG2 +END_FTR_SECTION_IFCLR(CPU_FTR_SLB) + EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common) + + . = 0x380 + .globl data_access_slb_pSeries +data_access_slb_pSeries: + HMT_MEDIUM + mtspr SPRN_SPRG1,r13 + mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ + std r3,PACA_EXSLB+EX_R3(r13) + mfspr r3,SPRN_DAR + std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */ + mfcr r9 +#ifdef __DISABLED__ + /* Keep that around for when we re-implement dynamic VSIDs */ + cmpdi r3,0 + bge slb_miss_user_pseries +#endif /* __DISABLED__ */ + std r10,PACA_EXSLB+EX_R10(r13) + std r11,PACA_EXSLB+EX_R11(r13) + std r12,PACA_EXSLB+EX_R12(r13) + mfspr r10,SPRN_SPRG1 + std r10,PACA_EXSLB+EX_R13(r13) + mfspr r12,SPRN_SRR1 /* and SRR1 */ +#ifndef CONFIG_RELOCATABLE + b .slb_miss_realmode +#else + /* + * We can't just use a direct branch to .slb_miss_realmode + * because the distance from here to there depends on where + * the kernel ends up being put. + */ + mfctr r11 + ld r10,PACAKBASE(r13) + LOAD_HANDLER(r10, .slb_miss_realmode) + mtctr r10 + bctr +#endif + + STD_EXCEPTION_PSERIES(0x400, instruction_access) + + . = 0x480 + .globl instruction_access_slb_pSeries +instruction_access_slb_pSeries: + HMT_MEDIUM + mtspr SPRN_SPRG1,r13 + mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ + std r3,PACA_EXSLB+EX_R3(r13) + mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ + std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */ + mfcr r9 +#ifdef __DISABLED__ + /* Keep that around for when we re-implement dynamic VSIDs */ + cmpdi r3,0 + bge slb_miss_user_pseries +#endif /* __DISABLED__ */ + std r10,PACA_EXSLB+EX_R10(r13) + std r11,PACA_EXSLB+EX_R11(r13) + std r12,PACA_EXSLB+EX_R12(r13) + mfspr r10,SPRN_SPRG1 + std r10,PACA_EXSLB+EX_R13(r13) + mfspr r12,SPRN_SRR1 /* and SRR1 */ +#ifndef CONFIG_RELOCATABLE + b .slb_miss_realmode +#else + mfctr r11 + ld r10,PACAKBASE(r13) + LOAD_HANDLER(r10, .slb_miss_realmode) + mtctr r10 + bctr +#endif + + MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt) + STD_EXCEPTION_PSERIES(0x600, alignment) + STD_EXCEPTION_PSERIES(0x700, program_check) + STD_EXCEPTION_PSERIES(0x800, fp_unavailable) + MASKABLE_EXCEPTION_PSERIES(0x900, decrementer) + STD_EXCEPTION_PSERIES(0xa00, trap_0a) + STD_EXCEPTION_PSERIES(0xb00, trap_0b) + + . = 0xc00 + .globl system_call_pSeries +system_call_pSeries: + HMT_MEDIUM +BEGIN_FTR_SECTION + cmpdi r0,0x1ebe + beq- 1f +END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) + mr r9,r13 + mfspr r13,SPRN_SPRG3 + mfspr r11,SPRN_SRR0 + ld r12,PACAKBASE(r13) + ld r10,PACAKMSR(r13) + LOAD_HANDLER(r12, system_call_entry) + mtspr SPRN_SRR0,r12 + mfspr r12,SPRN_SRR1 + mtspr SPRN_SRR1,r10 + rfid + b . /* prevent speculative execution */ + +/* Fast LE/BE switch system call */ +1: mfspr r12,SPRN_SRR1 + xori r12,r12,MSR_LE + mtspr SPRN_SRR1,r12 + rfid /* return to userspace */ + b . + + STD_EXCEPTION_PSERIES(0xd00, single_step) + STD_EXCEPTION_PSERIES(0xe00, trap_0e) + + /* We need to deal with the Altivec unavailable exception + * here which is at 0xf20, thus in the middle of the + * prolog code of the PerformanceMonitor one. A little + * trickery is thus necessary + */ + . = 0xf00 + b performance_monitor_pSeries + + . = 0xf20 + b altivec_unavailable_pSeries + + . = 0xf40 + b vsx_unavailable_pSeries + +#ifdef CONFIG_CBE_RAS + HSTD_EXCEPTION_PSERIES(0x1200, cbe_system_error) +#endif /* CONFIG_CBE_RAS */ + STD_EXCEPTION_PSERIES(0x1300, instruction_breakpoint) +#ifdef CONFIG_CBE_RAS + HSTD_EXCEPTION_PSERIES(0x1600, cbe_maintenance) +#endif /* CONFIG_CBE_RAS */ + STD_EXCEPTION_PSERIES(0x1700, altivec_assist) +#ifdef CONFIG_CBE_RAS + HSTD_EXCEPTION_PSERIES(0x1800, cbe_thermal) +#endif /* CONFIG_CBE_RAS */ + + . = 0x3000 + +/*** pSeries interrupt support ***/ + + /* moved from 0xf00 */ + STD_EXCEPTION_PSERIES(., performance_monitor) + STD_EXCEPTION_PSERIES(., altivec_unavailable) + STD_EXCEPTION_PSERIES(., vsx_unavailable) + +/* + * An interrupt came in while soft-disabled; clear EE in SRR1, + * clear paca->hard_enabled and return. + */ +masked_interrupt: + stb r10,PACAHARDIRQEN(r13) + mtcrf 0x80,r9 + ld r9,PACA_EXGEN+EX_R9(r13) + mfspr r10,SPRN_SRR1 + rldicl r10,r10,48,1 /* clear MSR_EE */ + rotldi r10,r10,16 + mtspr SPRN_SRR1,r10 + ld r10,PACA_EXGEN+EX_R10(r13) + mfspr r13,SPRN_SPRG1 + rfid + b . + + .align 7 +do_stab_bolted_pSeries: + mtcrf 0x80,r12 + mfspr r12,SPRN_SPRG2 + EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted) + +#ifdef CONFIG_PPC_PSERIES +/* + * Vectors for the FWNMI option. Share common code. + */ + .globl system_reset_fwnmi + .align 7 +system_reset_fwnmi: + HMT_MEDIUM + mtspr SPRN_SPRG1,r13 /* save r13 */ + EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common) + + .globl machine_check_fwnmi + .align 7 +machine_check_fwnmi: + HMT_MEDIUM + mtspr SPRN_SPRG1,r13 /* save r13 */ + EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common) + +#endif /* CONFIG_PPC_PSERIES */ + +#ifdef __DISABLED__ +/* + * This is used for when the SLB miss handler has to go virtual, + * which doesn't happen for now anymore but will once we re-implement + * dynamic VSIDs for shared page tables + */ +slb_miss_user_pseries: + std r10,PACA_EXGEN+EX_R10(r13) + std r11,PACA_EXGEN+EX_R11(r13) + std r12,PACA_EXGEN+EX_R12(r13) + mfspr r10,SPRG1 + ld r11,PACA_EXSLB+EX_R9(r13) + ld r12,PACA_EXSLB+EX_R3(r13) + std r10,PACA_EXGEN+EX_R13(r13) + std r11,PACA_EXGEN+EX_R9(r13) + std r12,PACA_EXGEN+EX_R3(r13) + clrrdi r12,r13,32 + mfmsr r10 + mfspr r11,SRR0 /* save SRR0 */ + ori r12,r12,slb_miss_user_common@l /* virt addr of handler */ + ori r10,r10,MSR_IR|MSR_DR|MSR_RI + mtspr SRR0,r12 + mfspr r12,SRR1 /* and SRR1 */ + mtspr SRR1,r10 + rfid + b . /* prevent spec. execution */ +#endif /* __DISABLED__ */ + + .align 7 + .globl __end_interrupts +__end_interrupts: + +/* + * Code from here down to __end_handlers is invoked from the + * exception prologs above. Because the prologs assemble the + * addresses of these handlers using the LOAD_HANDLER macro, + * which uses an addi instruction, these handlers must be in + * the first 32k of the kernel image. + */ + +/*** Common interrupt handlers ***/ + + STD_EXCEPTION_COMMON(0x100, system_reset, .system_reset_exception) + + /* + * Machine check is different because we use a different + * save area: PACA_EXMC instead of PACA_EXGEN. + */ + .align 7 + .globl machine_check_common +machine_check_common: + EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) + FINISH_NAP + DISABLE_INTS + bl .save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + bl .machine_check_exception + b .ret_from_except + + STD_EXCEPTION_COMMON_LITE(0x900, decrementer, .timer_interrupt) + STD_EXCEPTION_COMMON(0xa00, trap_0a, .unknown_exception) + STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception) + STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception) + STD_EXCEPTION_COMMON(0xe00, trap_0e, .unknown_exception) + STD_EXCEPTION_COMMON_IDLE(0xf00, performance_monitor, .performance_monitor_exception) + STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, .instruction_breakpoint_exception) +#ifdef CONFIG_ALTIVEC + STD_EXCEPTION_COMMON(0x1700, altivec_assist, .altivec_assist_exception) +#else + STD_EXCEPTION_COMMON(0x1700, altivec_assist, .unknown_exception) +#endif +#ifdef CONFIG_CBE_RAS + STD_EXCEPTION_COMMON(0x1200, cbe_system_error, .cbe_system_error_exception) + STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, .cbe_maintenance_exception) + STD_EXCEPTION_COMMON(0x1800, cbe_thermal, .cbe_thermal_exception) +#endif /* CONFIG_CBE_RAS */ + + .align 7 +system_call_entry: + b system_call_common + +/* + * Here we have detected that the kernel stack pointer is bad. + * R9 contains the saved CR, r13 points to the paca, + * r10 contains the (bad) kernel stack pointer, + * r11 and r12 contain the saved SRR0 and SRR1. + * We switch to using an emergency stack, save the registers there, + * and call kernel_bad_stack(), which panics. + */ +bad_stack: + ld r1,PACAEMERGSP(r13) + subi r1,r1,64+INT_FRAME_SIZE + std r9,_CCR(r1) + std r10,GPR1(r1) + std r11,_NIP(r1) + std r12,_MSR(r1) + mfspr r11,SPRN_DAR + mfspr r12,SPRN_DSISR + std r11,_DAR(r1) + std r12,_DSISR(r1) + mflr r10 + mfctr r11 + mfxer r12 + std r10,_LINK(r1) + std r11,_CTR(r1) + std r12,_XER(r1) + SAVE_GPR(0,r1) + SAVE_GPR(2,r1) + SAVE_4GPRS(3,r1) + SAVE_2GPRS(7,r1) + SAVE_10GPRS(12,r1) + SAVE_10GPRS(22,r1) + lhz r12,PACA_TRAP_SAVE(r13) + std r12,_TRAP(r1) + addi r11,r1,INT_FRAME_SIZE + std r11,0(r1) + li r12,0 + std r12,0(r11) + ld r2,PACATOC(r13) +1: addi r3,r1,STACK_FRAME_OVERHEAD + bl .kernel_bad_stack + b 1b + +/* + * Here r13 points to the paca, r9 contains the saved CR, + * SRR0 and SRR1 are saved in r11 and r12, + * r9 - r13 are saved in paca->exgen. + */ + .align 7 + .globl data_access_common +data_access_common: + mfspr r10,SPRN_DAR + std r10,PACA_EXGEN+EX_DAR(r13) + mfspr r10,SPRN_DSISR + stw r10,PACA_EXGEN+EX_DSISR(r13) + EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN) + ld r3,PACA_EXGEN+EX_DAR(r13) + lwz r4,PACA_EXGEN+EX_DSISR(r13) + li r5,0x300 + b .do_hash_page /* Try to handle as hpte fault */ + + .align 7 + .globl instruction_access_common +instruction_access_common: + EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) + ld r3,_NIP(r1) + andis. r4,r12,0x5820 + li r5,0x400 + b .do_hash_page /* Try to handle as hpte fault */ + +/* + * Here is the common SLB miss user that is used when going to virtual + * mode for SLB misses, that is currently not used + */ +#ifdef __DISABLED__ + .align 7 + .globl slb_miss_user_common +slb_miss_user_common: + mflr r10 + std r3,PACA_EXGEN+EX_DAR(r13) + stw r9,PACA_EXGEN+EX_CCR(r13) + std r10,PACA_EXGEN+EX_LR(r13) + std r11,PACA_EXGEN+EX_SRR0(r13) + bl .slb_allocate_user + + ld r10,PACA_EXGEN+EX_LR(r13) + ld r3,PACA_EXGEN+EX_R3(r13) + lwz r9,PACA_EXGEN+EX_CCR(r13) + ld r11,PACA_EXGEN+EX_SRR0(r13) + mtlr r10 + beq- slb_miss_fault + + andi. r10,r12,MSR_RI /* check for unrecoverable exception */ + beq- unrecov_user_slb + mfmsr r10 + +.machine push +.machine "power4" + mtcrf 0x80,r9 +.machine pop + + clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */ + mtmsrd r10,1 + + mtspr SRR0,r11 + mtspr SRR1,r12 + + ld r9,PACA_EXGEN+EX_R9(r13) + ld r10,PACA_EXGEN+EX_R10(r13) + ld r11,PACA_EXGEN+EX_R11(r13) + ld r12,PACA_EXGEN+EX_R12(r13) + ld r13,PACA_EXGEN+EX_R13(r13) + rfid + b . + +slb_miss_fault: + EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN) + ld r4,PACA_EXGEN+EX_DAR(r13) + li r5,0 + std r4,_DAR(r1) + std r5,_DSISR(r1) + b handle_page_fault + +unrecov_user_slb: + EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN) + DISABLE_INTS + bl .save_nvgprs +1: addi r3,r1,STACK_FRAME_OVERHEAD + bl .unrecoverable_exception + b 1b + +#endif /* __DISABLED__ */ + + +/* + * r13 points to the PACA, r9 contains the saved CR, + * r12 contain the saved SRR1, SRR0 is still ready for return + * r3 has the faulting address + * r9 - r13 are saved in paca->exslb. + * r3 is saved in paca->slb_r3 + * We assume we aren't going to take any exceptions during this procedure. + */ +_GLOBAL(slb_miss_realmode) + mflr r10 +#ifdef CONFIG_RELOCATABLE + mtctr r11 +#endif + + stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ + std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ + + bl .slb_allocate_realmode + + /* All done -- return from exception. */ + + ld r10,PACA_EXSLB+EX_LR(r13) + ld r3,PACA_EXSLB+EX_R3(r13) + lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ +#ifdef CONFIG_PPC_ISERIES +BEGIN_FW_FTR_SECTION + ld r11,PACALPPACAPTR(r13) + ld r11,LPPACASRR0(r11) /* get SRR0 value */ +END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) +#endif /* CONFIG_PPC_ISERIES */ + + mtlr r10 + + andi. r10,r12,MSR_RI /* check for unrecoverable exception */ + beq- 2f + +.machine push +.machine "power4" + mtcrf 0x80,r9 + mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ +.machine pop + +#ifdef CONFIG_PPC_ISERIES +BEGIN_FW_FTR_SECTION + mtspr SPRN_SRR0,r11 + mtspr SPRN_SRR1,r12 +END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) +#endif /* CONFIG_PPC_ISERIES */ + ld r9,PACA_EXSLB+EX_R9(r13) + ld r10,PACA_EXSLB+EX_R10(r13) + ld r11,PACA_EXSLB+EX_R11(r13) + ld r12,PACA_EXSLB+EX_R12(r13) + ld r13,PACA_EXSLB+EX_R13(r13) + rfid + b . /* prevent speculative execution */ + +2: +#ifdef CONFIG_PPC_ISERIES +BEGIN_FW_FTR_SECTION + b unrecov_slb +END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) +#endif /* CONFIG_PPC_ISERIES */ + mfspr r11,SPRN_SRR0 + ld r10,PACAKBASE(r13) + LOAD_HANDLER(r10,unrecov_slb) + mtspr SPRN_SRR0,r10 + ld r10,PACAKMSR(r13) + mtspr SPRN_SRR1,r10 + rfid + b . + +unrecov_slb: + EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) + DISABLE_INTS + bl .save_nvgprs +1: addi r3,r1,STACK_FRAME_OVERHEAD + bl .unrecoverable_exception + b 1b + + .align 7 + .globl hardware_interrupt_common + .globl hardware_interrupt_entry +hardware_interrupt_common: + EXCEPTION_PROLOG_COMMON(0x500, PACA_EXGEN) + FINISH_NAP +hardware_interrupt_entry: + DISABLE_INTS +BEGIN_FTR_SECTION + bl .ppc64_runlatch_on +END_FTR_SECTION_IFSET(CPU_FTR_CTRL) + addi r3,r1,STACK_FRAME_OVERHEAD + bl .do_IRQ + b .ret_from_except_lite + +#ifdef CONFIG_PPC_970_NAP +power4_fixup_nap: + andc r9,r9,r10 + std r9,TI_LOCAL_FLAGS(r11) + ld r10,_LINK(r1) /* make idle task do the */ + std r10,_NIP(r1) /* equivalent of a blr */ + blr +#endif + + .align 7 + .globl alignment_common +alignment_common: + mfspr r10,SPRN_DAR + std r10,PACA_EXGEN+EX_DAR(r13) + mfspr r10,SPRN_DSISR + stw r10,PACA_EXGEN+EX_DSISR(r13) + EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) + ld r3,PACA_EXGEN+EX_DAR(r13) + lwz r4,PACA_EXGEN+EX_DSISR(r13) + std r3,_DAR(r1) + std r4,_DSISR(r1) + bl .save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + ENABLE_INTS + bl .alignment_exception + b .ret_from_except + + .align 7 + .globl program_check_common +program_check_common: + EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) + bl .save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + ENABLE_INTS + bl .program_check_exception + b .ret_from_except + + .align 7 + .globl fp_unavailable_common +fp_unavailable_common: + EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) + bne 1f /* if from user, just load it up */ + bl .save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + ENABLE_INTS + bl .kernel_fp_unavailable_exception + BUG_OPCODE +1: bl .load_up_fpu + b fast_exception_return + + .align 7 + .globl altivec_unavailable_common +altivec_unavailable_common: + EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) +#ifdef CONFIG_ALTIVEC +BEGIN_FTR_SECTION + beq 1f + bl .load_up_altivec + b fast_exception_return +1: +END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) +#endif + bl .save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + ENABLE_INTS + bl .altivec_unavailable_exception + b .ret_from_except + + .align 7 + .globl vsx_unavailable_common +vsx_unavailable_common: + EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) +#ifdef CONFIG_VSX +BEGIN_FTR_SECTION + bne .load_up_vsx +1: +END_FTR_SECTION_IFSET(CPU_FTR_VSX) +#endif + bl .save_nvgprs + addi r3,r1,STACK_FRAME_OVERHEAD + ENABLE_INTS + bl .vsx_unavailable_exception + b .ret_from_except + + .align 7 + .globl __end_handlers +__end_handlers: + +/* + * Return from an exception with minimal checks. + * The caller is assumed to have done EXCEPTION_PROLOG_COMMON. + * If interrupts have been enabled, or anything has been + * done that might have changed the scheduling status of + * any task or sent any task a signal, you should use + * ret_from_except or ret_from_except_lite instead of this. + */ +fast_exc_return_irq: /* restores irq state too */ + ld r3,SOFTE(r1) + TRACE_AND_RESTORE_IRQ(r3); + ld r12,_MSR(r1) + rldicl r4,r12,49,63 /* get MSR_EE to LSB */ + stb r4,PACAHARDIRQEN(r13) /* restore paca->hard_enabled */ + b 1f + + .globl fast_exception_return +fast_exception_return: + ld r12,_MSR(r1) +1: ld r11,_NIP(r1) + andi. r3,r12,MSR_RI /* check if RI is set */ + beq- unrecov_fer + +#ifdef CONFIG_VIRT_CPU_ACCOUNTING + andi. r3,r12,MSR_PR + beq 2f + ACCOUNT_CPU_USER_EXIT(r3, r4) +2: +#endif + + ld r3,_CCR(r1) + ld r4,_LINK(r1) + ld r5,_CTR(r1) + ld r6,_XER(r1) + mtcr r3 + mtlr r4 + mtctr r5 + mtxer r6 + REST_GPR(0, r1) + REST_8GPRS(2, r1) + + mfmsr r10 + rldicl r10,r10,48,1 /* clear EE */ + rldicr r10,r10,16,61 /* clear RI (LE is 0 already) */ + mtmsrd r10,1 + + mtspr SPRN_SRR1,r12 + mtspr SPRN_SRR0,r11 + REST_4GPRS(10, r1) + ld r1,GPR1(r1) + rfid + b . /* prevent speculative execution */ + +unrecov_fer: + bl .save_nvgprs +1: addi r3,r1,STACK_FRAME_OVERHEAD + bl .unrecoverable_exception + b 1b + + +/* + * Hash table stuff + */ + .align 7 +_STATIC(do_hash_page) + std r3,_DAR(r1) + std r4,_DSISR(r1) + + andis. r0,r4,0xa450 /* weird error? */ + bne- handle_page_fault /* if not, try to insert a HPTE */ +BEGIN_FTR_SECTION + andis. r0,r4,0x0020 /* Is it a segment table fault? */ + bne- do_ste_alloc /* If so handle it */ +END_FTR_SECTION_IFCLR(CPU_FTR_SLB) + + /* + * On iSeries, we soft-disable interrupts here, then + * hard-enable interrupts so that the hash_page code can spin on + * the hash_table_lock without problems on a shared processor. + */ + DISABLE_INTS + + /* + * Currently, trace_hardirqs_off() will be called by DISABLE_INTS + * and will clobber volatile registers when irq tracing is enabled + * so we need to reload them. It may be possible to be smarter here + * and move the irq tracing elsewhere but let's keep it simple for + * now + */ +#ifdef CONFIG_TRACE_IRQFLAGS + ld r3,_DAR(r1) + ld r4,_DSISR(r1) + ld r5,_TRAP(r1) + ld r12,_MSR(r1) + clrrdi r5,r5,4 +#endif /* CONFIG_TRACE_IRQFLAGS */ + /* + * We need to set the _PAGE_USER bit if MSR_PR is set or if we are + * accessing a userspace segment (even from the kernel). We assume + * kernel addresses always have the high bit set. + */ + rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */ + rotldi r0,r3,15 /* Move high bit into MSR_PR posn */ + orc r0,r12,r0 /* MSR_PR | ~high_bit */ + rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */ + ori r4,r4,1 /* add _PAGE_PRESENT */ + rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */ + + /* + * r3 contains the faulting address + * r4 contains the required access permissions + * r5 contains the trap number + * + * at return r3 = 0 for success + */ + bl .hash_page /* build HPTE if possible */ + cmpdi r3,0 /* see if hash_page succeeded */ + +BEGIN_FW_FTR_SECTION + /* + * If we had interrupts soft-enabled at the point where the + * DSI/ISI occurred, and an interrupt came in during hash_page, + * handle it now. + * We jump to ret_from_except_lite rather than fast_exception_return + * because ret_from_except_lite will check for and handle pending + * interrupts if necessary. + */ + beq 13f +END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) + +BEGIN_FW_FTR_SECTION + /* + * Here we have interrupts hard-disabled, so it is sufficient + * to restore paca->{soft,hard}_enable and get out. + */ + beq fast_exc_return_irq /* Return from exception on success */ +END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES) + + /* For a hash failure, we don't bother re-enabling interrupts */ + ble- 12f + + /* + * hash_page couldn't handle it, set soft interrupt enable back + * to what it was before the trap. Note that .raw_local_irq_restore + * handles any interrupts pending at this point. + */ + ld r3,SOFTE(r1) + TRACE_AND_RESTORE_IRQ_PARTIAL(r3, 11f) + bl .raw_local_irq_restore + b 11f + +/* Here we have a page fault that hash_page can't handle. */ +handle_page_fault: + ENABLE_INTS +11: ld r4,_DAR(r1) + ld r5,_DSISR(r1) + addi r3,r1,STACK_FRAME_OVERHEAD + bl .do_page_fault + cmpdi r3,0 + beq+ 13f + bl .save_nvgprs + mr r5,r3 + addi r3,r1,STACK_FRAME_OVERHEAD + lwz r4,_DAR(r1) + bl .bad_page_fault + b .ret_from_except + +13: b .ret_from_except_lite + +/* We have a page fault that hash_page could handle but HV refused + * the PTE insertion + */ +12: bl .save_nvgprs + mr r5,r3 + addi r3,r1,STACK_FRAME_OVERHEAD + ld r4,_DAR(r1) + bl .low_hash_fault + b .ret_from_except + + /* here we have a segment miss */ +do_ste_alloc: + bl .ste_allocate /* try to insert stab entry */ + cmpdi r3,0 + bne- handle_page_fault + b fast_exception_return + +/* + * r13 points to the PACA, r9 contains the saved CR, + * r11 and r12 contain the saved SRR0 and SRR1. + * r9 - r13 are saved in paca->exslb. + * We assume we aren't going to take any exceptions during this procedure. + * We assume (DAR >> 60) == 0xc. + */ + .align 7 +_GLOBAL(do_stab_bolted) + stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ + std r11,PACA_EXSLB+EX_SRR0(r13) /* save SRR0 in exc. frame */ + + /* Hash to the primary group */ + ld r10,PACASTABVIRT(r13) + mfspr r11,SPRN_DAR + srdi r11,r11,28 + rldimi r10,r11,7,52 /* r10 = first ste of the group */ + + /* Calculate VSID */ + /* This is a kernel address, so protovsid = ESID */ + ASM_VSID_SCRAMBLE(r11, r9, 256M) + rldic r9,r11,12,16 /* r9 = vsid << 12 */ + + /* Search the primary group for a free entry */ +1: ld r11,0(r10) /* Test valid bit of the current ste */ + andi. r11,r11,0x80 + beq 2f + addi r10,r10,16 + andi. r11,r10,0x70 + bne 1b + + /* Stick for only searching the primary group for now. */ + /* At least for now, we use a very simple random castout scheme */ + /* Use the TB as a random number ; OR in 1 to avoid entry 0 */ + mftb r11 + rldic r11,r11,4,57 /* r11 = (r11 << 4) & 0x70 */ + ori r11,r11,0x10 + + /* r10 currently points to an ste one past the group of interest */ + /* make it point to the randomly selected entry */ + subi r10,r10,128 + or r10,r10,r11 /* r10 is the entry to invalidate */ + + isync /* mark the entry invalid */ + ld r11,0(r10) + rldicl r11,r11,56,1 /* clear the valid bit */ + rotldi r11,r11,8 + std r11,0(r10) + sync + + clrrdi r11,r11,28 /* Get the esid part of the ste */ + slbie r11 + +2: std r9,8(r10) /* Store the vsid part of the ste */ + eieio + + mfspr r11,SPRN_DAR /* Get the new esid */ + clrrdi r11,r11,28 /* Permits a full 32b of ESID */ + ori r11,r11,0x90 /* Turn on valid and kp */ + std r11,0(r10) /* Put new entry back into the stab */ + + sync + + /* All done -- return from exception. */ + lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ + ld r11,PACA_EXSLB+EX_SRR0(r13) /* get saved SRR0 */ + + andi. r10,r12,MSR_RI + beq- unrecov_slb + + mtcrf 0x80,r9 /* restore CR */ + + mfmsr r10 + clrrdi r10,r10,2 + mtmsrd r10,1 + + mtspr SPRN_SRR0,r11 + mtspr SPRN_SRR1,r12 + ld r9,PACA_EXSLB+EX_R9(r13) + ld r10,PACA_EXSLB+EX_R10(r13) + ld r11,PACA_EXSLB+EX_R11(r13) + ld r12,PACA_EXSLB+EX_R12(r13) + ld r13,PACA_EXSLB+EX_R13(r13) + rfid + b . /* prevent speculative execution */ + +/* + * Space for CPU0's segment table. + * + * On iSeries, the hypervisor must fill in at least one entry before + * we get control (with relocate on). The address is given to the hv + * as a page number (see xLparMap below), so this must be at a + * fixed address (the linker can't compute (u64)&initial_stab >> + * PAGE_SHIFT). + */ + . = STAB0_OFFSET /* 0x6000 */ + .globl initial_stab +initial_stab: + .space 4096 + +#ifdef CONFIG_PPC_PSERIES +/* + * Data area reserved for FWNMI option. + * This address (0x7000) is fixed by the RPA. + */ + .= 0x7000 + .globl fwnmi_data_area +fwnmi_data_area: +#endif /* CONFIG_PPC_PSERIES */ + + /* iSeries does not use the FWNMI stuff, so it is safe to put + * this here, even if we later allow kernels that will boot on + * both pSeries and iSeries */ +#ifdef CONFIG_PPC_ISERIES + . = LPARMAP_PHYS + .globl xLparMap +xLparMap: + .quad HvEsidsToMap /* xNumberEsids */ + .quad HvRangesToMap /* xNumberRanges */ + .quad STAB0_PAGE /* xSegmentTableOffs */ + .zero 40 /* xRsvd */ + /* xEsids (HvEsidsToMap entries of 2 quads) */ + .quad PAGE_OFFSET_ESID /* xKernelEsid */ + .quad PAGE_OFFSET_VSID /* xKernelVsid */ + .quad VMALLOC_START_ESID /* xKernelEsid */ + .quad VMALLOC_START_VSID /* xKernelVsid */ + /* xRanges (HvRangesToMap entries of 3 quads) */ + .quad HvPagesToMap /* xPages */ + .quad 0 /* xOffset */ + .quad PAGE_OFFSET_VSID << (SID_SHIFT - HW_PAGE_SHIFT) /* xVPN */ + +#endif /* CONFIG_PPC_ISERIES */ + +#ifdef CONFIG_PPC_PSERIES + . = 0x8000 +#endif /* CONFIG_PPC_PSERIES */ diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 2d182f119d1d..1b12696cca06 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -23,25 +23,14 @@ #include <asm/code-patching.h> #include <asm/ftrace.h> -#ifdef CONFIG_PPC32 -# define GET_ADDR(addr) addr -#else -/* PowerPC64's functions are data that points to the functions */ -# define GET_ADDR(addr) (*(unsigned long *)addr) -#endif #ifdef CONFIG_DYNAMIC_FTRACE -static unsigned int ftrace_nop_replace(void) -{ - return PPC_INST_NOP; -} - static unsigned int ftrace_call_replace(unsigned long ip, unsigned long addr, int link) { unsigned int op; - addr = GET_ADDR(addr); + addr = ppc_function_entry((void *)addr); /* if (link) set op to 'bl' else 'b' */ op = create_branch((unsigned int *)ip, addr, link ? 1 : 0); @@ -49,14 +38,6 @@ ftrace_call_replace(unsigned long ip, unsigned long addr, int link) return op; } -#ifdef CONFIG_PPC64 -# define _ASM_ALIGN " .align 3 " -# define _ASM_PTR " .llong " -#else -# define _ASM_ALIGN " .align 2 " -# define _ASM_PTR " .long " -#endif - static int ftrace_modify_code(unsigned long ip, unsigned int old, unsigned int new) { @@ -197,7 +178,7 @@ __ftrace_make_nop(struct module *mod, ptr = ((unsigned long)jmp[0] << 32) + jmp[1]; /* This should match what was called */ - if (ptr != GET_ADDR(addr)) { + if (ptr != ppc_function_entry((void *)addr)) { printk(KERN_ERR "addr does not match %lx\n", ptr); return -EINVAL; } @@ -328,7 +309,7 @@ int ftrace_make_nop(struct module *mod, if (test_24bit_addr(ip, addr)) { /* within range */ old = ftrace_call_replace(ip, addr, 1); - new = ftrace_nop_replace(); + new = PPC_INST_NOP; return ftrace_modify_code(ip, old, new); } @@ -466,7 +447,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) */ if (test_24bit_addr(ip, addr)) { /* within range */ - old = ftrace_nop_replace(); + old = PPC_INST_NOP; new = ftrace_call_replace(ip, addr, 1); return ftrace_modify_code(ip, old, new); } @@ -570,7 +551,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) return_hooker = (unsigned long)&mod_return_to_handler; #endif - return_hooker = GET_ADDR(return_hooker); + return_hooker = ppc_function_entry((void *)return_hooker); /* * Protect against fault, even if it shouldn't diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index c01467f952d3..48469463f89e 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -733,9 +733,11 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU) AltiVecUnavailable: EXCEPTION_PROLOG #ifdef CONFIG_ALTIVEC - bne load_up_altivec /* if from user, just load it up */ + beq 1f + bl load_up_altivec /* if from user, just load it up */ + b fast_exception_return #endif /* CONFIG_ALTIVEC */ - addi r3,r1,STACK_FRAME_OVERHEAD +1: addi r3,r1,STACK_FRAME_OVERHEAD EXC_XFER_EE_LITE(0xf20, altivec_unavailable_exception) PerformanceMonitor: @@ -743,101 +745,6 @@ PerformanceMonitor: addi r3,r1,STACK_FRAME_OVERHEAD EXC_XFER_STD(0xf00, performance_monitor_exception) -#ifdef CONFIG_ALTIVEC -/* Note that the AltiVec support is closely modeled after the FP - * support. Changes to one are likely to be applicable to the - * other! */ -load_up_altivec: -/* - * Disable AltiVec for the task which had AltiVec previously, - * and save its AltiVec registers in its thread_struct. - * Enables AltiVec for use in the kernel on return. - * On SMP we know the AltiVec units are free, since we give it up every - * switch. -- Kumar - */ - mfmsr r5 - oris r5,r5,MSR_VEC@h - MTMSRD(r5) /* enable use of AltiVec now */ - isync -/* - * For SMP, we don't do lazy AltiVec switching because it just gets too - * horrendously complex, especially when a task switches from one CPU - * to another. Instead we call giveup_altivec in switch_to. - */ -#ifndef CONFIG_SMP - tophys(r6,0) - addis r3,r6,last_task_used_altivec@ha - lwz r4,last_task_used_altivec@l(r3) - cmpwi 0,r4,0 - beq 1f - add r4,r4,r6 - addi r4,r4,THREAD /* want THREAD of last_task_used_altivec */ - SAVE_32VRS(0,r10,r4) - mfvscr vr0 - li r10,THREAD_VSCR - stvx vr0,r10,r4 - lwz r5,PT_REGS(r4) - add r5,r5,r6 - lwz r4,_MSR-STACK_FRAME_OVERHEAD(r5) - lis r10,MSR_VEC@h - andc r4,r4,r10 /* disable altivec for previous task */ - stw r4,_MSR-STACK_FRAME_OVERHEAD(r5) -1: -#endif /* CONFIG_SMP */ - /* enable use of AltiVec after return */ - oris r9,r9,MSR_VEC@h - mfspr r5,SPRN_SPRG3 /* current task's THREAD (phys) */ - li r4,1 - li r10,THREAD_VSCR - stw r4,THREAD_USED_VR(r5) - lvx vr0,r10,r5 - mtvscr vr0 - REST_32VRS(0,r10,r5) -#ifndef CONFIG_SMP - subi r4,r5,THREAD - sub r4,r4,r6 - stw r4,last_task_used_altivec@l(r3) -#endif /* CONFIG_SMP */ - /* restore registers and return */ - /* we haven't used ctr or xer or lr */ - b fast_exception_return - -/* - * giveup_altivec(tsk) - * Disable AltiVec for the task given as the argument, - * and save the AltiVec registers in its thread_struct. - * Enables AltiVec for use in the kernel on return. - */ - - .globl giveup_altivec -giveup_altivec: - mfmsr r5 - oris r5,r5,MSR_VEC@h - SYNC - MTMSRD(r5) /* enable use of AltiVec now */ - isync - cmpwi 0,r3,0 - beqlr- /* if no previous owner, done */ - addi r3,r3,THREAD /* want THREAD of task */ - lwz r5,PT_REGS(r3) - cmpwi 0,r5,0 - SAVE_32VRS(0, r4, r3) - mfvscr vr0 - li r4,THREAD_VSCR - stvx vr0,r4,r3 - beq 1f - lwz r4,_MSR-STACK_FRAME_OVERHEAD(r5) - lis r3,MSR_VEC@h - andc r4,r4,r3 /* disable AltiVec for previous task */ - stw r4,_MSR-STACK_FRAME_OVERHEAD(r5) -1: -#ifndef CONFIG_SMP - li r5,0 - lis r4,last_task_used_altivec@ha - stw r5,last_task_used_altivec@l(r4) -#endif /* CONFIG_SMP */ - blr -#endif /* CONFIG_ALTIVEC */ /* * This code is jumped to from the startup code to copy diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 50ef505b8fb6..012505ebd9f9 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -12,8 +12,9 @@ * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com * - * This file contains the low-level support and setup for the - * PowerPC-64 platform, including trap and interrupt dispatch. + * This file contains the entry point for the 64-bit kernel along + * with some early initialization code common to all 64-bit powerpc + * variants. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -38,36 +39,25 @@ #include <asm/exception.h> #include <asm/irqflags.h> -/* - * We layout physical memory as follows: - * 0x0000 - 0x00ff : Secondary processor spin code - * 0x0100 - 0x2fff : pSeries Interrupt prologs - * 0x3000 - 0x5fff : interrupt support, iSeries and common interrupt prologs - * 0x6000 - 0x6fff : Initial (CPU0) segment table - * 0x7000 - 0x7fff : FWNMI data area - * 0x8000 - : Early init and support code - */ - -/* - * SPRG Usage - * - * Register Definition - * - * SPRG0 reserved for hypervisor - * SPRG1 temp - used to save gpr - * SPRG2 temp - used to save gpr - * SPRG3 virt addr of paca +/* The physical memory is layed out such that the secondary processor + * spin code sits at 0x0000...0x00ff. On server, the vectors follow + * using the layout described in exceptions-64s.S */ /* * Entering into this code we make the following assumptions: - * For pSeries: + * + * For pSeries or server processors: * 1. The MMU is off & open firmware is running in real mode. * 2. The kernel is entered at __start * * For iSeries: * 1. The MMU is on (as it always is for iSeries) * 2. The kernel is entered at system_reset_iSeries + * + * For Book3E processors: + * 1. The MMU is on running in AS0 in a state defined in ePAPR + * 2. The kernel is entered at __start */ .text @@ -166,1065 +156,14 @@ exception_marker: .text /* - * This is the start of the interrupt handlers for pSeries - * This code runs with relocation off. - * Code from here to __end_interrupts gets copied down to real - * address 0x100 when we are running a relocatable kernel. - * Therefore any relative branches in this section must only - * branch to labels in this section. - */ - . = 0x100 - .globl __start_interrupts -__start_interrupts: - - STD_EXCEPTION_PSERIES(0x100, system_reset) - - . = 0x200 -_machine_check_pSeries: - HMT_MEDIUM - mtspr SPRN_SPRG1,r13 /* save r13 */ - EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common) - - . = 0x300 - .globl data_access_pSeries -data_access_pSeries: - HMT_MEDIUM - mtspr SPRN_SPRG1,r13 -BEGIN_FTR_SECTION - mtspr SPRN_SPRG2,r12 - mfspr r13,SPRN_DAR - mfspr r12,SPRN_DSISR - srdi r13,r13,60 - rlwimi r13,r12,16,0x20 - mfcr r12 - cmpwi r13,0x2c - beq do_stab_bolted_pSeries - mtcrf 0x80,r12 - mfspr r12,SPRN_SPRG2 -END_FTR_SECTION_IFCLR(CPU_FTR_SLB) - EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common) - - . = 0x380 - .globl data_access_slb_pSeries -data_access_slb_pSeries: - HMT_MEDIUM - mtspr SPRN_SPRG1,r13 - mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ - std r3,PACA_EXSLB+EX_R3(r13) - mfspr r3,SPRN_DAR - std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */ - mfcr r9 -#ifdef __DISABLED__ - /* Keep that around for when we re-implement dynamic VSIDs */ - cmpdi r3,0 - bge slb_miss_user_pseries -#endif /* __DISABLED__ */ - std r10,PACA_EXSLB+EX_R10(r13) - std r11,PACA_EXSLB+EX_R11(r13) - std r12,PACA_EXSLB+EX_R12(r13) - mfspr r10,SPRN_SPRG1 - std r10,PACA_EXSLB+EX_R13(r13) - mfspr r12,SPRN_SRR1 /* and SRR1 */ -#ifndef CONFIG_RELOCATABLE - b .slb_miss_realmode -#else - /* - * We can't just use a direct branch to .slb_miss_realmode - * because the distance from here to there depends on where - * the kernel ends up being put. - */ - mfctr r11 - ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, .slb_miss_realmode) - mtctr r10 - bctr -#endif - - STD_EXCEPTION_PSERIES(0x400, instruction_access) - - . = 0x480 - .globl instruction_access_slb_pSeries -instruction_access_slb_pSeries: - HMT_MEDIUM - mtspr SPRN_SPRG1,r13 - mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ - std r3,PACA_EXSLB+EX_R3(r13) - mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */ - std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */ - mfcr r9 -#ifdef __DISABLED__ - /* Keep that around for when we re-implement dynamic VSIDs */ - cmpdi r3,0 - bge slb_miss_user_pseries -#endif /* __DISABLED__ */ - std r10,PACA_EXSLB+EX_R10(r13) - std r11,PACA_EXSLB+EX_R11(r13) - std r12,PACA_EXSLB+EX_R12(r13) - mfspr r10,SPRN_SPRG1 - std r10,PACA_EXSLB+EX_R13(r13) - mfspr r12,SPRN_SRR1 /* and SRR1 */ -#ifndef CONFIG_RELOCATABLE - b .slb_miss_realmode -#else - mfctr r11 - ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10, .slb_miss_realmode) - mtctr r10 - bctr -#endif - - MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt) - STD_EXCEPTION_PSERIES(0x600, alignment) - STD_EXCEPTION_PSERIES(0x700, program_check) - STD_EXCEPTION_PSERIES(0x800, fp_unavailable) - MASKABLE_EXCEPTION_PSERIES(0x900, decrementer) - STD_EXCEPTION_PSERIES(0xa00, trap_0a) - STD_EXCEPTION_PSERIES(0xb00, trap_0b) - - . = 0xc00 - .globl system_call_pSeries -system_call_pSeries: - HMT_MEDIUM -BEGIN_FTR_SECTION - cmpdi r0,0x1ebe - beq- 1f -END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) - mr r9,r13 - mfspr r13,SPRN_SPRG3 - mfspr r11,SPRN_SRR0 - ld r12,PACAKBASE(r13) - ld r10,PACAKMSR(r13) - LOAD_HANDLER(r12, system_call_entry) - mtspr SPRN_SRR0,r12 - mfspr r12,SPRN_SRR1 - mtspr SPRN_SRR1,r10 - rfid - b . /* prevent speculative execution */ - -/* Fast LE/BE switch system call */ -1: mfspr r12,SPRN_SRR1 - xori r12,r12,MSR_LE - mtspr SPRN_SRR1,r12 - rfid /* return to userspace */ - b . - - STD_EXCEPTION_PSERIES(0xd00, single_step) - STD_EXCEPTION_PSERIES(0xe00, trap_0e) - - /* We need to deal with the Altivec unavailable exception - * here which is at 0xf20, thus in the middle of the - * prolog code of the PerformanceMonitor one. A little - * trickery is thus necessary - */ - . = 0xf00 - b performance_monitor_pSeries - - . = 0xf20 - b altivec_unavailable_pSeries - - . = 0xf40 - b vsx_unavailable_pSeries - -#ifdef CONFIG_CBE_RAS - HSTD_EXCEPTION_PSERIES(0x1200, cbe_system_error) -#endif /* CONFIG_CBE_RAS */ - STD_EXCEPTION_PSERIES(0x1300, instruction_breakpoint) -#ifdef CONFIG_CBE_RAS - HSTD_EXCEPTION_PSERIES(0x1600, cbe_maintenance) -#endif /* CONFIG_CBE_RAS */ - STD_EXCEPTION_PSERIES(0x1700, altivec_assist) -#ifdef CONFIG_CBE_RAS - HSTD_EXCEPTION_PSERIES(0x1800, cbe_thermal) -#endif /* CONFIG_CBE_RAS */ - - . = 0x3000 - -/*** pSeries interrupt support ***/ - - /* moved from 0xf00 */ - STD_EXCEPTION_PSERIES(., performance_monitor) - STD_EXCEPTION_PSERIES(., altivec_unavailable) - STD_EXCEPTION_PSERIES(., vsx_unavailable) - -/* - * An interrupt came in while soft-disabled; clear EE in SRR1, - * clear paca->hard_enabled and return. - */ -masked_interrupt: - stb r10,PACAHARDIRQEN(r13) - mtcrf 0x80,r9 - ld r9,PACA_EXGEN+EX_R9(r13) - mfspr r10,SPRN_SRR1 - rldicl r10,r10,48,1 /* clear MSR_EE */ - rotldi r10,r10,16 - mtspr SPRN_SRR1,r10 - ld r10,PACA_EXGEN+EX_R10(r13) - mfspr r13,SPRN_SPRG1 - rfid - b . - - .align 7 -do_stab_bolted_pSeries: - mtcrf 0x80,r12 - mfspr r12,SPRN_SPRG2 - EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted) - -#ifdef CONFIG_PPC_PSERIES -/* - * Vectors for the FWNMI option. Share common code. - */ - .globl system_reset_fwnmi - .align 7 -system_reset_fwnmi: - HMT_MEDIUM - mtspr SPRN_SPRG1,r13 /* save r13 */ - EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common) - - .globl machine_check_fwnmi - .align 7 -machine_check_fwnmi: - HMT_MEDIUM - mtspr SPRN_SPRG1,r13 /* save r13 */ - EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common) - -#endif /* CONFIG_PPC_PSERIES */ - -#ifdef __DISABLED__ -/* - * This is used for when the SLB miss handler has to go virtual, - * which doesn't happen for now anymore but will once we re-implement - * dynamic VSIDs for shared page tables - */ -slb_miss_user_pseries: - std r10,PACA_EXGEN+EX_R10(r13) - std r11,PACA_EXGEN+EX_R11(r13) - std r12,PACA_EXGEN+EX_R12(r13) - mfspr r10,SPRG1 - ld r11,PACA_EXSLB+EX_R9(r13) - ld r12,PACA_EXSLB+EX_R3(r13) - std r10,PACA_EXGEN+EX_R13(r13) - std r11,PACA_EXGEN+EX_R9(r13) - std r12,PACA_EXGEN+EX_R3(r13) - clrrdi r12,r13,32 - mfmsr r10 - mfspr r11,SRR0 /* save SRR0 */ - ori r12,r12,slb_miss_user_common@l /* virt addr of handler */ - ori r10,r10,MSR_IR|MSR_DR|MSR_RI - mtspr SRR0,r12 - mfspr r12,SRR1 /* and SRR1 */ - mtspr SRR1,r10 - rfid - b . /* prevent spec. execution */ -#endif /* __DISABLED__ */ - - .align 7 - .globl __end_interrupts -__end_interrupts: - -/* - * Code from here down to __end_handlers is invoked from the - * exception prologs above. Because the prologs assemble the - * addresses of these handlers using the LOAD_HANDLER macro, - * which uses an addi instruction, these handlers must be in - * the first 32k of the kernel image. - */ - -/*** Common interrupt handlers ***/ - - STD_EXCEPTION_COMMON(0x100, system_reset, .system_reset_exception) - - /* - * Machine check is different because we use a different - * save area: PACA_EXMC instead of PACA_EXGEN. - */ - .align 7 - .globl machine_check_common -machine_check_common: - EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC) - FINISH_NAP - DISABLE_INTS - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - bl .machine_check_exception - b .ret_from_except - - STD_EXCEPTION_COMMON_LITE(0x900, decrementer, .timer_interrupt) - STD_EXCEPTION_COMMON(0xa00, trap_0a, .unknown_exception) - STD_EXCEPTION_COMMON(0xb00, trap_0b, .unknown_exception) - STD_EXCEPTION_COMMON(0xd00, single_step, .single_step_exception) - STD_EXCEPTION_COMMON(0xe00, trap_0e, .unknown_exception) - STD_EXCEPTION_COMMON_IDLE(0xf00, performance_monitor, .performance_monitor_exception) - STD_EXCEPTION_COMMON(0x1300, instruction_breakpoint, .instruction_breakpoint_exception) -#ifdef CONFIG_ALTIVEC - STD_EXCEPTION_COMMON(0x1700, altivec_assist, .altivec_assist_exception) -#else - STD_EXCEPTION_COMMON(0x1700, altivec_assist, .unknown_exception) -#endif -#ifdef CONFIG_CBE_RAS - STD_EXCEPTION_COMMON(0x1200, cbe_system_error, .cbe_system_error_exception) - STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, .cbe_maintenance_exception) - STD_EXCEPTION_COMMON(0x1800, cbe_thermal, .cbe_thermal_exception) -#endif /* CONFIG_CBE_RAS */ - - .align 7 -system_call_entry: - b system_call_common - -/* - * Here we have detected that the kernel stack pointer is bad. - * R9 contains the saved CR, r13 points to the paca, - * r10 contains the (bad) kernel stack pointer, - * r11 and r12 contain the saved SRR0 and SRR1. - * We switch to using an emergency stack, save the registers there, - * and call kernel_bad_stack(), which panics. - */ -bad_stack: - ld r1,PACAEMERGSP(r13) - subi r1,r1,64+INT_FRAME_SIZE - std r9,_CCR(r1) - std r10,GPR1(r1) - std r11,_NIP(r1) - std r12,_MSR(r1) - mfspr r11,SPRN_DAR - mfspr r12,SPRN_DSISR - std r11,_DAR(r1) - std r12,_DSISR(r1) - mflr r10 - mfctr r11 - mfxer r12 - std r10,_LINK(r1) - std r11,_CTR(r1) - std r12,_XER(r1) - SAVE_GPR(0,r1) - SAVE_GPR(2,r1) - SAVE_4GPRS(3,r1) - SAVE_2GPRS(7,r1) - SAVE_10GPRS(12,r1) - SAVE_10GPRS(22,r1) - lhz r12,PACA_TRAP_SAVE(r13) - std r12,_TRAP(r1) - addi r11,r1,INT_FRAME_SIZE - std r11,0(r1) - li r12,0 - std r12,0(r11) - ld r2,PACATOC(r13) -1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .kernel_bad_stack - b 1b - -/* - * Here r13 points to the paca, r9 contains the saved CR, - * SRR0 and SRR1 are saved in r11 and r12, - * r9 - r13 are saved in paca->exgen. - */ - .align 7 - .globl data_access_common -data_access_common: - mfspr r10,SPRN_DAR - std r10,PACA_EXGEN+EX_DAR(r13) - mfspr r10,SPRN_DSISR - stw r10,PACA_EXGEN+EX_DSISR(r13) - EXCEPTION_PROLOG_COMMON(0x300, PACA_EXGEN) - ld r3,PACA_EXGEN+EX_DAR(r13) - lwz r4,PACA_EXGEN+EX_DSISR(r13) - li r5,0x300 - b .do_hash_page /* Try to handle as hpte fault */ - - .align 7 - .globl instruction_access_common -instruction_access_common: - EXCEPTION_PROLOG_COMMON(0x400, PACA_EXGEN) - ld r3,_NIP(r1) - andis. r4,r12,0x5820 - li r5,0x400 - b .do_hash_page /* Try to handle as hpte fault */ - -/* - * Here is the common SLB miss user that is used when going to virtual - * mode for SLB misses, that is currently not used - */ -#ifdef __DISABLED__ - .align 7 - .globl slb_miss_user_common -slb_miss_user_common: - mflr r10 - std r3,PACA_EXGEN+EX_DAR(r13) - stw r9,PACA_EXGEN+EX_CCR(r13) - std r10,PACA_EXGEN+EX_LR(r13) - std r11,PACA_EXGEN+EX_SRR0(r13) - bl .slb_allocate_user - - ld r10,PACA_EXGEN+EX_LR(r13) - ld r3,PACA_EXGEN+EX_R3(r13) - lwz r9,PACA_EXGEN+EX_CCR(r13) - ld r11,PACA_EXGEN+EX_SRR0(r13) - mtlr r10 - beq- slb_miss_fault - - andi. r10,r12,MSR_RI /* check for unrecoverable exception */ - beq- unrecov_user_slb - mfmsr r10 - -.machine push -.machine "power4" - mtcrf 0x80,r9 -.machine pop - - clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */ - mtmsrd r10,1 - - mtspr SRR0,r11 - mtspr SRR1,r12 - - ld r9,PACA_EXGEN+EX_R9(r13) - ld r10,PACA_EXGEN+EX_R10(r13) - ld r11,PACA_EXGEN+EX_R11(r13) - ld r12,PACA_EXGEN+EX_R12(r13) - ld r13,PACA_EXGEN+EX_R13(r13) - rfid - b . - -slb_miss_fault: - EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN) - ld r4,PACA_EXGEN+EX_DAR(r13) - li r5,0 - std r4,_DAR(r1) - std r5,_DSISR(r1) - b handle_page_fault - -unrecov_user_slb: - EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN) - DISABLE_INTS - bl .save_nvgprs -1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .unrecoverable_exception - b 1b - -#endif /* __DISABLED__ */ - - -/* - * r13 points to the PACA, r9 contains the saved CR, - * r12 contain the saved SRR1, SRR0 is still ready for return - * r3 has the faulting address - * r9 - r13 are saved in paca->exslb. - * r3 is saved in paca->slb_r3 - * We assume we aren't going to take any exceptions during this procedure. - */ -_GLOBAL(slb_miss_realmode) - mflr r10 -#ifdef CONFIG_RELOCATABLE - mtctr r11 -#endif - - stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ - std r10,PACA_EXSLB+EX_LR(r13) /* save LR */ - - bl .slb_allocate_realmode - - /* All done -- return from exception. */ - - ld r10,PACA_EXSLB+EX_LR(r13) - ld r3,PACA_EXSLB+EX_R3(r13) - lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ -#ifdef CONFIG_PPC_ISERIES -BEGIN_FW_FTR_SECTION - ld r11,PACALPPACAPTR(r13) - ld r11,LPPACASRR0(r11) /* get SRR0 value */ -END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) -#endif /* CONFIG_PPC_ISERIES */ - - mtlr r10 - - andi. r10,r12,MSR_RI /* check for unrecoverable exception */ - beq- 2f - -.machine push -.machine "power4" - mtcrf 0x80,r9 - mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */ -.machine pop - -#ifdef CONFIG_PPC_ISERIES -BEGIN_FW_FTR_SECTION - mtspr SPRN_SRR0,r11 - mtspr SPRN_SRR1,r12 -END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) -#endif /* CONFIG_PPC_ISERIES */ - ld r9,PACA_EXSLB+EX_R9(r13) - ld r10,PACA_EXSLB+EX_R10(r13) - ld r11,PACA_EXSLB+EX_R11(r13) - ld r12,PACA_EXSLB+EX_R12(r13) - ld r13,PACA_EXSLB+EX_R13(r13) - rfid - b . /* prevent speculative execution */ - -2: -#ifdef CONFIG_PPC_ISERIES -BEGIN_FW_FTR_SECTION - b unrecov_slb -END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) -#endif /* CONFIG_PPC_ISERIES */ - mfspr r11,SPRN_SRR0 - ld r10,PACAKBASE(r13) - LOAD_HANDLER(r10,unrecov_slb) - mtspr SPRN_SRR0,r10 - ld r10,PACAKMSR(r13) - mtspr SPRN_SRR1,r10 - rfid - b . - -unrecov_slb: - EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB) - DISABLE_INTS - bl .save_nvgprs -1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .unrecoverable_exception - b 1b - - .align 7 - .globl hardware_interrupt_common - .globl hardware_interrupt_entry -hardware_interrupt_common: - EXCEPTION_PROLOG_COMMON(0x500, PACA_EXGEN) - FINISH_NAP -hardware_interrupt_entry: - DISABLE_INTS -BEGIN_FTR_SECTION - bl .ppc64_runlatch_on -END_FTR_SECTION_IFSET(CPU_FTR_CTRL) - addi r3,r1,STACK_FRAME_OVERHEAD - bl .do_IRQ - b .ret_from_except_lite - -#ifdef CONFIG_PPC_970_NAP -power4_fixup_nap: - andc r9,r9,r10 - std r9,TI_LOCAL_FLAGS(r11) - ld r10,_LINK(r1) /* make idle task do the */ - std r10,_NIP(r1) /* equivalent of a blr */ - blr -#endif - - .align 7 - .globl alignment_common -alignment_common: - mfspr r10,SPRN_DAR - std r10,PACA_EXGEN+EX_DAR(r13) - mfspr r10,SPRN_DSISR - stw r10,PACA_EXGEN+EX_DSISR(r13) - EXCEPTION_PROLOG_COMMON(0x600, PACA_EXGEN) - ld r3,PACA_EXGEN+EX_DAR(r13) - lwz r4,PACA_EXGEN+EX_DSISR(r13) - std r3,_DAR(r1) - std r4,_DSISR(r1) - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - ENABLE_INTS - bl .alignment_exception - b .ret_from_except - - .align 7 - .globl program_check_common -program_check_common: - EXCEPTION_PROLOG_COMMON(0x700, PACA_EXGEN) - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - ENABLE_INTS - bl .program_check_exception - b .ret_from_except - - .align 7 - .globl fp_unavailable_common -fp_unavailable_common: - EXCEPTION_PROLOG_COMMON(0x800, PACA_EXGEN) - bne 1f /* if from user, just load it up */ - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - ENABLE_INTS - bl .kernel_fp_unavailable_exception - BUG_OPCODE -1: bl .load_up_fpu - b fast_exception_return - - .align 7 - .globl altivec_unavailable_common -altivec_unavailable_common: - EXCEPTION_PROLOG_COMMON(0xf20, PACA_EXGEN) -#ifdef CONFIG_ALTIVEC -BEGIN_FTR_SECTION - beq 1f - bl .load_up_altivec - b fast_exception_return -1: -END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) -#endif - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - ENABLE_INTS - bl .altivec_unavailable_exception - b .ret_from_except - - .align 7 - .globl vsx_unavailable_common -vsx_unavailable_common: - EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN) -#ifdef CONFIG_VSX -BEGIN_FTR_SECTION - bne .load_up_vsx -1: -END_FTR_SECTION_IFSET(CPU_FTR_VSX) -#endif - bl .save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD - ENABLE_INTS - bl .vsx_unavailable_exception - b .ret_from_except - - .align 7 - .globl __end_handlers -__end_handlers: - -/* - * Return from an exception with minimal checks. - * The caller is assumed to have done EXCEPTION_PROLOG_COMMON. - * If interrupts have been enabled, or anything has been - * done that might have changed the scheduling status of - * any task or sent any task a signal, you should use - * ret_from_except or ret_from_except_lite instead of this. + * On server, we include the exception vectors code here as it + * relies on absolute addressing which is only possible within + * this compilation unit */ -fast_exc_return_irq: /* restores irq state too */ - ld r3,SOFTE(r1) - TRACE_AND_RESTORE_IRQ(r3); - ld r12,_MSR(r1) - rldicl r4,r12,49,63 /* get MSR_EE to LSB */ - stb r4,PACAHARDIRQEN(r13) /* restore paca->hard_enabled */ - b 1f - - .globl fast_exception_return -fast_exception_return: - ld r12,_MSR(r1) -1: ld r11,_NIP(r1) - andi. r3,r12,MSR_RI /* check if RI is set */ - beq- unrecov_fer - -#ifdef CONFIG_VIRT_CPU_ACCOUNTING - andi. r3,r12,MSR_PR - beq 2f - ACCOUNT_CPU_USER_EXIT(r3, r4) -2: +#ifdef CONFIG_PPC_BOOK3S +#include "exceptions-64s.S" #endif - ld r3,_CCR(r1) - ld r4,_LINK(r1) - ld r5,_CTR(r1) - ld r6,_XER(r1) - mtcr r3 - mtlr r4 - mtctr r5 - mtxer r6 - REST_GPR(0, r1) - REST_8GPRS(2, r1) - - mfmsr r10 - rldicl r10,r10,48,1 /* clear EE */ - rldicr r10,r10,16,61 /* clear RI (LE is 0 already) */ - mtmsrd r10,1 - - mtspr SPRN_SRR1,r12 - mtspr SPRN_SRR0,r11 - REST_4GPRS(10, r1) - ld r1,GPR1(r1) - rfid - b . /* prevent speculative execution */ - -unrecov_fer: - bl .save_nvgprs -1: addi r3,r1,STACK_FRAME_OVERHEAD - bl .unrecoverable_exception - b 1b - -#ifdef CONFIG_ALTIVEC -/* - * load_up_altivec(unused, unused, tsk) - * Disable VMX for the task which had it previously, - * and save its vector registers in its thread_struct. - * Enables the VMX for use in the kernel on return. - * On SMP we know the VMX is free, since we give it up every - * switch (ie, no lazy save of the vector registers). - * On entry: r13 == 'current' && last_task_used_altivec != 'current' - */ -_STATIC(load_up_altivec) - mfmsr r5 /* grab the current MSR */ - oris r5,r5,MSR_VEC@h - mtmsrd r5 /* enable use of VMX now */ - isync - -/* - * For SMP, we don't do lazy VMX switching because it just gets too - * horrendously complex, especially when a task switches from one CPU - * to another. Instead we call giveup_altvec in switch_to. - * VRSAVE isn't dealt with here, that is done in the normal context - * switch code. Note that we could rely on vrsave value to eventually - * avoid saving all of the VREGs here... - */ -#ifndef CONFIG_SMP - ld r3,last_task_used_altivec@got(r2) - ld r4,0(r3) - cmpdi 0,r4,0 - beq 1f - /* Save VMX state to last_task_used_altivec's THREAD struct */ - addi r4,r4,THREAD - SAVE_32VRS(0,r5,r4) - mfvscr vr0 - li r10,THREAD_VSCR - stvx vr0,r10,r4 - /* Disable VMX for last_task_used_altivec */ - ld r5,PT_REGS(r4) - ld r4,_MSR-STACK_FRAME_OVERHEAD(r5) - lis r6,MSR_VEC@h - andc r4,r4,r6 - std r4,_MSR-STACK_FRAME_OVERHEAD(r5) -1: -#endif /* CONFIG_SMP */ - /* Hack: if we get an altivec unavailable trap with VRSAVE - * set to all zeros, we assume this is a broken application - * that fails to set it properly, and thus we switch it to - * all 1's - */ - mfspr r4,SPRN_VRSAVE - cmpdi 0,r4,0 - bne+ 1f - li r4,-1 - mtspr SPRN_VRSAVE,r4 -1: - /* enable use of VMX after return */ - ld r4,PACACURRENT(r13) - addi r5,r4,THREAD /* Get THREAD */ - oris r12,r12,MSR_VEC@h - std r12,_MSR(r1) - li r4,1 - li r10,THREAD_VSCR - stw r4,THREAD_USED_VR(r5) - lvx vr0,r10,r5 - mtvscr vr0 - REST_32VRS(0,r4,r5) -#ifndef CONFIG_SMP - /* Update last_task_used_math to 'current' */ - subi r4,r5,THREAD /* Back to 'current' */ - std r4,0(r3) -#endif /* CONFIG_SMP */ - /* restore registers and return */ - blr -#endif /* CONFIG_ALTIVEC */ - -#ifdef CONFIG_VSX -/* - * load_up_vsx(unused, unused, tsk) - * Disable VSX for the task which had it previously, - * and save its vector registers in its thread_struct. - * Reuse the fp and vsx saves, but first check to see if they have - * been saved already. - * On entry: r13 == 'current' && last_task_used_vsx != 'current' - */ -_STATIC(load_up_vsx) -/* Load FP and VSX registers if they haven't been done yet */ - andi. r5,r12,MSR_FP - beql+ load_up_fpu /* skip if already loaded */ - andis. r5,r12,MSR_VEC@h - beql+ load_up_altivec /* skip if already loaded */ - -#ifndef CONFIG_SMP - ld r3,last_task_used_vsx@got(r2) - ld r4,0(r3) - cmpdi 0,r4,0 - beq 1f - /* Disable VSX for last_task_used_vsx */ - addi r4,r4,THREAD - ld r5,PT_REGS(r4) - ld r4,_MSR-STACK_FRAME_OVERHEAD(r5) - lis r6,MSR_VSX@h - andc r6,r4,r6 - std r6,_MSR-STACK_FRAME_OVERHEAD(r5) -1: -#endif /* CONFIG_SMP */ - ld r4,PACACURRENT(r13) - addi r4,r4,THREAD /* Get THREAD */ - li r6,1 - stw r6,THREAD_USED_VSR(r4) /* ... also set thread used vsr */ - /* enable use of VSX after return */ - oris r12,r12,MSR_VSX@h - std r12,_MSR(r1) -#ifndef CONFIG_SMP - /* Update last_task_used_math to 'current' */ - ld r4,PACACURRENT(r13) - std r4,0(r3) -#endif /* CONFIG_SMP */ - b fast_exception_return -#endif /* CONFIG_VSX */ - -/* - * Hash table stuff - */ - .align 7 -_STATIC(do_hash_page) - std r3,_DAR(r1) - std r4,_DSISR(r1) - - andis. r0,r4,0xa450 /* weird error? */ - bne- handle_page_fault /* if not, try to insert a HPTE */ -BEGIN_FTR_SECTION - andis. r0,r4,0x0020 /* Is it a segment table fault? */ - bne- do_ste_alloc /* If so handle it */ -END_FTR_SECTION_IFCLR(CPU_FTR_SLB) - - /* - * On iSeries, we soft-disable interrupts here, then - * hard-enable interrupts so that the hash_page code can spin on - * the hash_table_lock without problems on a shared processor. - */ - DISABLE_INTS - - /* - * Currently, trace_hardirqs_off() will be called by DISABLE_INTS - * and will clobber volatile registers when irq tracing is enabled - * so we need to reload them. It may be possible to be smarter here - * and move the irq tracing elsewhere but let's keep it simple for - * now - */ -#ifdef CONFIG_TRACE_IRQFLAGS - ld r3,_DAR(r1) - ld r4,_DSISR(r1) - ld r5,_TRAP(r1) - ld r12,_MSR(r1) - clrrdi r5,r5,4 -#endif /* CONFIG_TRACE_IRQFLAGS */ - /* - * We need to set the _PAGE_USER bit if MSR_PR is set or if we are - * accessing a userspace segment (even from the kernel). We assume - * kernel addresses always have the high bit set. - */ - rlwinm r4,r4,32-25+9,31-9,31-9 /* DSISR_STORE -> _PAGE_RW */ - rotldi r0,r3,15 /* Move high bit into MSR_PR posn */ - orc r0,r12,r0 /* MSR_PR | ~high_bit */ - rlwimi r4,r0,32-13,30,30 /* becomes _PAGE_USER access bit */ - ori r4,r4,1 /* add _PAGE_PRESENT */ - rlwimi r4,r5,22+2,31-2,31-2 /* Set _PAGE_EXEC if trap is 0x400 */ - - /* - * r3 contains the faulting address - * r4 contains the required access permissions - * r5 contains the trap number - * - * at return r3 = 0 for success - */ - bl .hash_page /* build HPTE if possible */ - cmpdi r3,0 /* see if hash_page succeeded */ - -BEGIN_FW_FTR_SECTION - /* - * If we had interrupts soft-enabled at the point where the - * DSI/ISI occurred, and an interrupt came in during hash_page, - * handle it now. - * We jump to ret_from_except_lite rather than fast_exception_return - * because ret_from_except_lite will check for and handle pending - * interrupts if necessary. - */ - beq 13f -END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES) - -BEGIN_FW_FTR_SECTION - /* - * Here we have interrupts hard-disabled, so it is sufficient - * to restore paca->{soft,hard}_enable and get out. - */ - beq fast_exc_return_irq /* Return from exception on success */ -END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES) - - /* For a hash failure, we don't bother re-enabling interrupts */ - ble- 12f - - /* - * hash_page couldn't handle it, set soft interrupt enable back - * to what it was before the trap. Note that .raw_local_irq_restore - * handles any interrupts pending at this point. - */ - ld r3,SOFTE(r1) - TRACE_AND_RESTORE_IRQ_PARTIAL(r3, 11f) - bl .raw_local_irq_restore - b 11f - -/* Here we have a page fault that hash_page can't handle. */ -handle_page_fault: - ENABLE_INTS -11: ld r4,_DAR(r1) - ld r5,_DSISR(r1) - addi r3,r1,STACK_FRAME_OVERHEAD - bl .do_page_fault - cmpdi r3,0 - beq+ 13f - bl .save_nvgprs - mr r5,r3 - addi r3,r1,STACK_FRAME_OVERHEAD - lwz r4,_DAR(r1) - bl .bad_page_fault - b .ret_from_except - -13: b .ret_from_except_lite - -/* We have a page fault that hash_page could handle but HV refused - * the PTE insertion - */ -12: bl .save_nvgprs - mr r5,r3 - addi r3,r1,STACK_FRAME_OVERHEAD - ld r4,_DAR(r1) - bl .low_hash_fault - b .ret_from_except - - /* here we have a segment miss */ -do_ste_alloc: - bl .ste_allocate /* try to insert stab entry */ - cmpdi r3,0 - bne- handle_page_fault - b fast_exception_return - -/* - * r13 points to the PACA, r9 contains the saved CR, - * r11 and r12 contain the saved SRR0 and SRR1. - * r9 - r13 are saved in paca->exslb. - * We assume we aren't going to take any exceptions during this procedure. - * We assume (DAR >> 60) == 0xc. - */ - .align 7 -_GLOBAL(do_stab_bolted) - stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */ - std r11,PACA_EXSLB+EX_SRR0(r13) /* save SRR0 in exc. frame */ - - /* Hash to the primary group */ - ld r10,PACASTABVIRT(r13) - mfspr r11,SPRN_DAR - srdi r11,r11,28 - rldimi r10,r11,7,52 /* r10 = first ste of the group */ - - /* Calculate VSID */ - /* This is a kernel address, so protovsid = ESID */ - ASM_VSID_SCRAMBLE(r11, r9, 256M) - rldic r9,r11,12,16 /* r9 = vsid << 12 */ - - /* Search the primary group for a free entry */ -1: ld r11,0(r10) /* Test valid bit of the current ste */ - andi. r11,r11,0x80 - beq 2f - addi r10,r10,16 - andi. r11,r10,0x70 - bne 1b - - /* Stick for only searching the primary group for now. */ - /* At least for now, we use a very simple random castout scheme */ - /* Use the TB as a random number ; OR in 1 to avoid entry 0 */ - mftb r11 - rldic r11,r11,4,57 /* r11 = (r11 << 4) & 0x70 */ - ori r11,r11,0x10 - - /* r10 currently points to an ste one past the group of interest */ - /* make it point to the randomly selected entry */ - subi r10,r10,128 - or r10,r10,r11 /* r10 is the entry to invalidate */ - - isync /* mark the entry invalid */ - ld r11,0(r10) - rldicl r11,r11,56,1 /* clear the valid bit */ - rotldi r11,r11,8 - std r11,0(r10) - sync - - clrrdi r11,r11,28 /* Get the esid part of the ste */ - slbie r11 - -2: std r9,8(r10) /* Store the vsid part of the ste */ - eieio - - mfspr r11,SPRN_DAR /* Get the new esid */ - clrrdi r11,r11,28 /* Permits a full 32b of ESID */ - ori r11,r11,0x90 /* Turn on valid and kp */ - std r11,0(r10) /* Put new entry back into the stab */ - - sync - - /* All done -- return from exception. */ - lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */ - ld r11,PACA_EXSLB+EX_SRR0(r13) /* get saved SRR0 */ - - andi. r10,r12,MSR_RI - beq- unrecov_slb - - mtcrf 0x80,r9 /* restore CR */ - - mfmsr r10 - clrrdi r10,r10,2 - mtmsrd r10,1 - - mtspr SPRN_SRR0,r11 - mtspr SPRN_SRR1,r12 - ld r9,PACA_EXSLB+EX_R9(r13) - ld r10,PACA_EXSLB+EX_R10(r13) - ld r11,PACA_EXSLB+EX_R11(r13) - ld r12,PACA_EXSLB+EX_R12(r13) - ld r13,PACA_EXSLB+EX_R13(r13) - rfid - b . /* prevent speculative execution */ - -/* - * Space for CPU0's segment table. - * - * On iSeries, the hypervisor must fill in at least one entry before - * we get control (with relocate on). The address is given to the hv - * as a page number (see xLparMap below), so this must be at a - * fixed address (the linker can't compute (u64)&initial_stab >> - * PAGE_SHIFT). - */ - . = STAB0_OFFSET /* 0x6000 */ - .globl initial_stab -initial_stab: - .space 4096 - -#ifdef CONFIG_PPC_PSERIES -/* - * Data area reserved for FWNMI option. - * This address (0x7000) is fixed by the RPA. - */ - .= 0x7000 - .globl fwnmi_data_area -fwnmi_data_area: -#endif /* CONFIG_PPC_PSERIES */ - - /* iSeries does not use the FWNMI stuff, so it is safe to put - * this here, even if we later allow kernels that will boot on - * both pSeries and iSeries */ -#ifdef CONFIG_PPC_ISERIES - . = LPARMAP_PHYS - .globl xLparMap -xLparMap: - .quad HvEsidsToMap /* xNumberEsids */ - .quad HvRangesToMap /* xNumberRanges */ - .quad STAB0_PAGE /* xSegmentTableOffs */ - .zero 40 /* xRsvd */ - /* xEsids (HvEsidsToMap entries of 2 quads) */ - .quad PAGE_OFFSET_ESID /* xKernelEsid */ - .quad PAGE_OFFSET_VSID /* xKernelVsid */ - .quad VMALLOC_START_ESID /* xKernelEsid */ - .quad VMALLOC_START_VSID /* xKernelVsid */ - /* xRanges (HvRangesToMap entries of 3 quads) */ - .quad HvPagesToMap /* xPages */ - .quad 0 /* xOffset */ - .quad PAGE_OFFSET_VSID << (SID_SHIFT - HW_PAGE_SHIFT) /* xVPN */ - -#endif /* CONFIG_PPC_ISERIES */ - -#ifdef CONFIG_PPC_PSERIES - . = 0x8000 -#endif /* CONFIG_PPC_PSERIES */ /* * On pSeries and most other platforms, secondary processors spin diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index 95f39f1e68d4..5f9febc8d143 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h @@ -256,7 +256,7 @@ label: * off DE in the DSRR1 value and clearing the debug status. \ */ \ mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ - andis. r10,r10,DBSR_IC@h; \ + andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \ beq+ 2f; \ \ lis r10,KERNELBASE@h; /* check if exception in vectors */ \ @@ -271,7 +271,7 @@ label: \ /* here it looks like we got an inappropriate debug exception. */ \ 1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \ - lis r10,DBSR_IC@h; /* clear the IC event */ \ + lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \ mtspr SPRN_DBSR,r10; \ /* restore state and get out */ \ lwz r10,_CCR(r11); \ @@ -309,7 +309,7 @@ label: * off DE in the CSRR1 value and clearing the debug status. \ */ \ mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \ - andis. r10,r10,DBSR_IC@h; \ + andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \ beq+ 2f; \ \ lis r10,KERNELBASE@h; /* check if exception in vectors */ \ @@ -317,14 +317,14 @@ label: cmplw r12,r10; \ blt+ 2f; /* addr below exception vectors */ \ \ - lis r10,DebugCrit@h; \ + lis r10,DebugCrit@h; \ ori r10,r10,DebugCrit@l; \ cmplw r12,r10; \ bgt+ 2f; /* addr above exception vectors */ \ \ /* here it looks like we got an inappropriate debug exception. */ \ 1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CSRR1 value */ \ - lis r10,DBSR_IC@h; /* clear the IC event */ \ + lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \ mtspr SPRN_DBSR,r10; \ /* restore state and get out */ \ lwz r10,_CCR(r11); \ diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 844d3f882a15..f7f376ea7b17 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -118,6 +118,7 @@ notrace void raw_local_irq_restore(unsigned long en) if (!en) return; +#ifdef CONFIG_PPC_STD_MMU_64 if (firmware_has_feature(FW_FEATURE_ISERIES)) { /* * Do we need to disable preemption here? Not really: in the @@ -135,6 +136,7 @@ notrace void raw_local_irq_restore(unsigned long en) if (local_paca->lppaca_ptr->int_dword.any_int) iseries_handle_interrupts(); } +#endif /* CONFIG_PPC_STD_MMU_64 */ if (test_perf_counter_pending()) { clear_perf_counter_pending(); @@ -254,77 +256,84 @@ void fixup_irqs(cpumask_t map) } #endif -void do_IRQ(struct pt_regs *regs) -{ - struct pt_regs *old_regs = set_irq_regs(regs); - unsigned int irq; #ifdef CONFIG_IRQSTACKS +static inline void handle_one_irq(unsigned int irq) +{ struct thread_info *curtp, *irqtp; -#endif + unsigned long saved_sp_limit; + struct irq_desc *desc; - irq_enter(); + /* Switch to the irq stack to handle this */ + curtp = current_thread_info(); + irqtp = hardirq_ctx[smp_processor_id()]; + + if (curtp == irqtp) { + /* We're already on the irq stack, just handle it */ + generic_handle_irq(irq); + return; + } + + desc = irq_desc + irq; + saved_sp_limit = current->thread.ksp_limit; + + irqtp->task = curtp->task; + irqtp->flags = 0; + + /* Copy the softirq bits in preempt_count so that the + * softirq checks work in the hardirq context. */ + irqtp->preempt_count = (irqtp->preempt_count & ~SOFTIRQ_MASK) | + (curtp->preempt_count & SOFTIRQ_MASK); + + current->thread.ksp_limit = (unsigned long)irqtp + + _ALIGN_UP(sizeof(struct thread_info), 16); + + call_handle_irq(irq, desc, irqtp, desc->handle_irq); + current->thread.ksp_limit = saved_sp_limit; + irqtp->task = NULL; + + /* Set any flag that may have been set on the + * alternate stack + */ + if (irqtp->flags) + set_bits(irqtp->flags, &curtp->flags); +} +#else +static inline void handle_one_irq(unsigned int irq) +{ + generic_handle_irq(irq); +} +#endif +static inline void check_stack_overflow(void) +{ #ifdef CONFIG_DEBUG_STACKOVERFLOW - /* Debugging check for stack overflow: is there less than 2KB free? */ - { - long sp; + long sp; - sp = __get_SP() & (THREAD_SIZE-1); + sp = __get_SP() & (THREAD_SIZE-1); - if (unlikely(sp < (sizeof(struct thread_info) + 2048))) { - printk("do_IRQ: stack overflow: %ld\n", - sp - sizeof(struct thread_info)); - dump_stack(); - } + /* check for stack overflow: is there less than 2KB free? */ + if (unlikely(sp < (sizeof(struct thread_info) + 2048))) { + printk("do_IRQ: stack overflow: %ld\n", + sp - sizeof(struct thread_info)); + dump_stack(); } #endif +} - /* - * Every platform is required to implement ppc_md.get_irq. - * This function will either return an irq number or NO_IRQ to - * indicate there are no more pending. - * The value NO_IRQ_IGNORE is for buggy hardware and means that this - * IRQ has already been handled. -- Tom - */ - irq = ppc_md.get_irq(); +void do_IRQ(struct pt_regs *regs) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + unsigned int irq; - if (irq != NO_IRQ && irq != NO_IRQ_IGNORE) { -#ifdef CONFIG_IRQSTACKS - /* Switch to the irq stack to handle this */ - curtp = current_thread_info(); - irqtp = hardirq_ctx[smp_processor_id()]; - if (curtp != irqtp) { - struct irq_desc *desc = irq_desc + irq; - void *handler = desc->handle_irq; - unsigned long saved_sp_limit = current->thread.ksp_limit; - if (handler == NULL) - handler = &__do_IRQ; - irqtp->task = curtp->task; - irqtp->flags = 0; - - /* Copy the softirq bits in preempt_count so that the - * softirq checks work in the hardirq context. - */ - irqtp->preempt_count = - (irqtp->preempt_count & ~SOFTIRQ_MASK) | - (curtp->preempt_count & SOFTIRQ_MASK); + irq_enter(); - current->thread.ksp_limit = (unsigned long)irqtp + - _ALIGN_UP(sizeof(struct thread_info), 16); - call_handle_irq(irq, desc, irqtp, handler); - current->thread.ksp_limit = saved_sp_limit; - irqtp->task = NULL; + check_stack_overflow(); + irq = ppc_md.get_irq(); - /* Set any flag that may have been set on the - * alternate stack - */ - if (irqtp->flags) - set_bits(irqtp->flags, &curtp->flags); - } else -#endif - generic_handle_irq(irq); - } else if (irq != NO_IRQ_IGNORE) + if (irq != NO_IRQ && irq != NO_IRQ_IGNORE) + handle_one_irq(irq); + else if (irq != NO_IRQ_IGNORE) /* That's not SMP safe ... but who cares ? */ ppc_spurious_interrupts++; diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c index 78b3f7840ade..2419cc706ff1 100644 --- a/arch/powerpc/kernel/lparcfg.c +++ b/arch/powerpc/kernel/lparcfg.c @@ -169,6 +169,9 @@ struct hvcall_ppp_data { u8 unallocated_weight; u16 active_procs_in_pool; u16 active_system_procs; + u16 phys_platform_procs; + u32 max_proc_cap_avail; + u32 entitled_proc_cap_avail; }; /* @@ -190,13 +193,18 @@ struct hvcall_ppp_data { * XX - Unallocated Variable Processor Capacity Weight. * XXXX - Active processors in Physical Processor Pool. * XXXX - Processors active on platform. + * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1 + * XXXX - Physical platform procs allocated to virtualization. + * XXXXXX - Max procs capacity % available to the partitions pool. + * XXXXXX - Entitled procs capacity % available to the + * partitions pool. */ static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) { unsigned long rc; - unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; - rc = plpar_hcall(H_GET_PPP, retbuf); + rc = plpar_hcall9(H_GET_PPP, retbuf); ppp_data->entitlement = retbuf[0]; ppp_data->unallocated_entitlement = retbuf[1]; @@ -210,6 +218,10 @@ static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff; ppp_data->active_system_procs = retbuf[3] & 0xffff; + ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8; + ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff; + ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff; + return rc; } @@ -234,6 +246,8 @@ static unsigned h_pic(unsigned long *pool_idle_time, static void parse_ppp_data(struct seq_file *m) { struct hvcall_ppp_data ppp_data; + struct device_node *root; + const int *perf_level; int rc; rc = h_get_ppp(&ppp_data); @@ -267,6 +281,28 @@ static void parse_ppp_data(struct seq_file *m) seq_printf(m, "capped=%d\n", ppp_data.capped); seq_printf(m, "unallocated_capacity=%lld\n", ppp_data.unallocated_entitlement); + + /* The last bits of information returned from h_get_ppp are only + * valid if the ibm,partition-performance-parameters-level + * property is >= 1. + */ + root = of_find_node_by_path("/"); + if (root) { + perf_level = of_get_property(root, + "ibm,partition-performance-parameters-level", + NULL); + if (perf_level && (*perf_level >= 1)) { + seq_printf(m, + "physical_procs_allocated_to_virtualization=%d\n", + ppp_data.phys_platform_procs); + seq_printf(m, "max_proc_capacity_available=%d\n", + ppp_data.max_proc_cap_avail); + seq_printf(m, "entitled_proc_capacity_available=%d\n", + ppp_data.entitled_proc_cap_avail); + } + + of_node_put(root); + } } /** diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S index b9530b2395a2..a5cf9c1356a6 100644 --- a/arch/powerpc/kernel/misc_64.S +++ b/arch/powerpc/kernel/misc_64.S @@ -457,98 +457,6 @@ _GLOBAL(disable_kernel_fp) isync blr -#ifdef CONFIG_ALTIVEC - -#if 0 /* this has no callers for now */ -/* - * disable_kernel_altivec() - * Disable the VMX. - */ -_GLOBAL(disable_kernel_altivec) - mfmsr r3 - rldicl r0,r3,(63-MSR_VEC_LG),1 - rldicl r3,r0,(MSR_VEC_LG+1),0 - mtmsrd r3 /* disable use of VMX now */ - isync - blr -#endif /* 0 */ - -/* - * giveup_altivec(tsk) - * Disable VMX for the task given as the argument, - * and save the vector registers in its thread_struct. - * Enables the VMX for use in the kernel on return. - */ -_GLOBAL(giveup_altivec) - mfmsr r5 - oris r5,r5,MSR_VEC@h - mtmsrd r5 /* enable use of VMX now */ - isync - cmpdi 0,r3,0 - beqlr- /* if no previous owner, done */ - addi r3,r3,THREAD /* want THREAD of task */ - ld r5,PT_REGS(r3) - cmpdi 0,r5,0 - SAVE_32VRS(0,r4,r3) - mfvscr vr0 - li r4,THREAD_VSCR - stvx vr0,r4,r3 - beq 1f - ld r4,_MSR-STACK_FRAME_OVERHEAD(r5) -#ifdef CONFIG_VSX -BEGIN_FTR_SECTION - lis r3,(MSR_VEC|MSR_VSX)@h -FTR_SECTION_ELSE - lis r3,MSR_VEC@h -ALT_FTR_SECTION_END_IFSET(CPU_FTR_VSX) -#else - lis r3,MSR_VEC@h -#endif - andc r4,r4,r3 /* disable FP for previous task */ - std r4,_MSR-STACK_FRAME_OVERHEAD(r5) -1: -#ifndef CONFIG_SMP - li r5,0 - ld r4,last_task_used_altivec@got(r2) - std r5,0(r4) -#endif /* CONFIG_SMP */ - blr - -#endif /* CONFIG_ALTIVEC */ - -#ifdef CONFIG_VSX -/* - * __giveup_vsx(tsk) - * Disable VSX for the task given as the argument. - * Does NOT save vsx registers. - * Enables the VSX for use in the kernel on return. - */ -_GLOBAL(__giveup_vsx) - mfmsr r5 - oris r5,r5,MSR_VSX@h - mtmsrd r5 /* enable use of VSX now */ - isync - - cmpdi 0,r3,0 - beqlr- /* if no previous owner, done */ - addi r3,r3,THREAD /* want THREAD of task */ - ld r5,PT_REGS(r3) - cmpdi 0,r5,0 - beq 1f - ld r4,_MSR-STACK_FRAME_OVERHEAD(r5) - lis r3,MSR_VSX@h - andc r4,r4,r3 /* disable VSX for previous task */ - std r4,_MSR-STACK_FRAME_OVERHEAD(r5) -1: -#ifndef CONFIG_SMP - li r5,0 - ld r4,last_task_used_vsx@got(r2) - std r5,0(r4) -#endif /* CONFIG_SMP */ - blr - -#endif /* CONFIG_VSX */ - /* kexec_wait(phys_cpu) * * wait for the flag to change, indicating this kernel is going away but diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index c744b327bcab..e9962c7f8a09 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -18,6 +18,8 @@ * field correctly */ extern unsigned long __toc_start; +#ifdef CONFIG_PPC_BOOK3S + /* * The structure which the hypervisor knows about - this structure * should not cross a page boundary. The vpa_init/register_vpa call @@ -41,6 +43,10 @@ struct lppaca lppaca[] = { }, }; +#endif /* CONFIG_PPC_BOOK3S */ + +#ifdef CONFIG_PPC_STD_MMU_64 + /* * 3 persistent SLBs are registered here. The buffer will be zero * initially, hence will all be invaild until we actually write them. @@ -52,6 +58,8 @@ struct slb_shadow slb_shadow[] __cacheline_aligned = { }, }; +#endif /* CONFIG_PPC_STD_MMU_64 */ + /* The Paca is an array with one entry per processor. Each contains an * lppaca, which contains the information shared between the * hypervisor and Linux. @@ -77,15 +85,19 @@ void __init initialise_pacas(void) for (cpu = 0; cpu < NR_CPUS; cpu++) { struct paca_struct *new_paca = &paca[cpu]; +#ifdef CONFIG_PPC_BOOK3S new_paca->lppaca_ptr = &lppaca[cpu]; +#endif new_paca->lock_token = 0x8000; new_paca->paca_index = cpu; new_paca->kernel_toc = kernel_toc; new_paca->kernelbase = (unsigned long) _stext; new_paca->kernel_msr = MSR_KERNEL; new_paca->hw_cpu_id = 0xffff; - new_paca->slb_shadow_ptr = &slb_shadow[cpu]; new_paca->__current = &init_task; +#ifdef CONFIG_PPC_STD_MMU_64 + new_paca->slb_shadow_ptr = &slb_shadow[cpu]; +#endif /* CONFIG_PPC_STD_MMU_64 */ } } diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 4fee63cb53ff..5a56e97c5ac0 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1505,7 +1505,7 @@ void __init pcibios_resource_survey(void) * rest of the code later, for now, keep it as-is as our main * resource allocation function doesn't deal with sub-trees yet. */ -void __devinit pcibios_claim_one_bus(struct pci_bus *bus) +void pcibios_claim_one_bus(struct pci_bus *bus) { struct pci_dev *dev; struct pci_bus *child_bus; @@ -1533,7 +1533,6 @@ void __devinit pcibios_claim_one_bus(struct pci_bus *bus) list_for_each_entry(child_bus, &bus->children, node) pcibios_claim_one_bus(child_bus); } -EXPORT_SYMBOL_GPL(pcibios_claim_one_bus); /* pcibios_finish_adding_to_bus diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c index d473634e39e3..3ae1c666ff92 100644 --- a/arch/powerpc/kernel/pci_32.c +++ b/arch/powerpc/kernel/pci_32.c @@ -33,7 +33,6 @@ int pcibios_assign_bus_offset = 1; void pcibios_make_OF_bus_map(void); -static void fixup_broken_pcnet32(struct pci_dev* dev); static void fixup_cpc710_pci64(struct pci_dev* dev); #ifdef CONFIG_PPC_OF static u8* pci_to_OF_bus_map; @@ -72,16 +71,6 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_res DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl); static void -fixup_broken_pcnet32(struct pci_dev* dev) -{ - if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) { - dev->vendor = PCI_VENDOR_ID_AMD; - pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD); - } -} -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32); - -static void fixup_cpc710_pci64(struct pci_dev* dev) { /* Hide the PCI64 BARs from the kernel as their content doesn't @@ -447,14 +436,6 @@ static int __init pcibios_init(void) subsys_initcall(pcibios_init); -/* the next one is stolen from the alpha port... */ -void __init -pcibios_update_irq(struct pci_dev *dev, int irq) -{ - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); - /* XXX FIXME - update OF device tree node interrupt property */ -} - static struct pci_controller* pci_bus_to_hose(int bus) { diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index 96edb6f8babb..9e8902fa14c7 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -43,16 +43,6 @@ unsigned long pci_probe_only = 1; unsigned long pci_io_base = ISA_IO_BASE; EXPORT_SYMBOL(pci_io_base); -static void fixup_broken_pcnet32(struct pci_dev* dev) -{ - if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) { - dev->vendor = PCI_VENDOR_ID_AMD; - pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD); - } -} -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32); - - static u32 get_int_prop(struct device_node *np, const char *name, u32 def) { const u32 *prop; @@ -430,6 +420,9 @@ int pcibios_unmap_io_space(struct pci_bus *bus) * so flushing the hash table is the only sane way to make sure * that no hash entries are covering that removed bridge area * while still allowing other busses overlapping those pages + * + * Note: If we ever support P2P hotplug on Book3E, we'll have + * to do an appropriate TLB flush here too */ if (bus->self) { struct resource *res = bus->resource[0]; @@ -437,8 +430,10 @@ int pcibios_unmap_io_space(struct pci_bus *bus) pr_debug("IO unmapping for PCI-PCI bridge %s\n", pci_name(bus->self)); +#ifdef CONFIG_PPC_STD_MMU_64 __flush_hash_table_range(&init_mm, res->start + _IO_BASE, res->end + _IO_BASE + 1); +#endif return 0; } @@ -511,7 +506,7 @@ int __devinit pcibios_map_io_space(struct pci_bus *bus) pr_debug("IO mapping for PHB %s\n", hose->dn->full_name); pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n", hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc); - pr_debug(" size=0x%016lx (alloc=0x%016lx)\n", + pr_debug(" size=0x%016llx (alloc=0x%016lx)\n", hose->pci_io_size, size_page); /* Establish the mapping */ diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c index 1c67de52e3ce..d5e36e5dc7c2 100644 --- a/arch/powerpc/kernel/pci_dn.c +++ b/arch/powerpc/kernel/pci_dn.c @@ -27,7 +27,6 @@ #include <asm/io.h> #include <asm/prom.h> #include <asm/pci-bridge.h> -#include <asm/pSeries_reconfig.h> #include <asm/ppc-pci.h> #include <asm/firmware.h> @@ -35,7 +34,7 @@ * Traverse_func that inits the PCI fields of the device node. * NOTE: this *must* be done before read/write config to the device. */ -static void * __devinit update_dn_pci_info(struct device_node *dn, void *data) +void * __devinit update_dn_pci_info(struct device_node *dn, void *data) { struct pci_controller *phb = data; const int *type = @@ -184,29 +183,6 @@ struct device_node *fetch_dev_dn(struct pci_dev *dev) } EXPORT_SYMBOL(fetch_dev_dn); -static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node) -{ - struct device_node *np = node; - struct pci_dn *pci = NULL; - int err = NOTIFY_OK; - - switch (action) { - case PSERIES_RECONFIG_ADD: - pci = np->parent->data; - if (pci) - update_dn_pci_info(np, pci->phb); - break; - default: - err = NOTIFY_DONE; - break; - } - return err; -} - -static struct notifier_block pci_dn_reconfig_nb = { - .notifier_call = pci_dn_reconfig_notifier, -}; - /** * pci_devs_phb_init - Initialize phbs and pci devs under them. * @@ -223,6 +199,4 @@ void __init pci_devs_phb_init(void) /* This must be done first so the device nodes have valid pci info! */ list_for_each_entry_safe(phb, tmp, &hose_list, list_node) pci_devs_phb_init_dynamic(phb); - - pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb); } diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 7b44a33f03c2..3e7135bbe40f 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -650,7 +650,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, p->thread.ksp_limit = (unsigned long)task_stack_page(p) + _ALIGN_UP(sizeof(struct thread_info), 16); -#ifdef CONFIG_PPC64 +#ifdef CONFIG_PPC_STD_MMU_64 if (cpu_has_feature(CPU_FTR_SLB)) { unsigned long sp_vsid; unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp; diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index ce01ff2474da..d4405b95bfaa 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -585,7 +585,7 @@ static void __init check_cpu_pa_features(unsigned long node) ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); } -#ifdef CONFIG_PPC64 +#ifdef CONFIG_PPC_STD_MMU_64 static void __init check_cpu_slb_size(unsigned long node) { u32 *slb_size_ptr; diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 3635be61f899..9fa2c7dcd05a 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -704,15 +704,34 @@ void user_enable_single_step(struct task_struct *task) if (regs != NULL) { #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) + task->thread.dbcr0 &= ~DBCR0_BT; task->thread.dbcr0 |= DBCR0_IDM | DBCR0_IC; regs->msr |= MSR_DE; #else + regs->msr &= ~MSR_BE; regs->msr |= MSR_SE; #endif } set_tsk_thread_flag(task, TIF_SINGLESTEP); } +void user_enable_block_step(struct task_struct *task) +{ + struct pt_regs *regs = task->thread.regs; + + if (regs != NULL) { +#if defined(CONFIG_40x) || defined(CONFIG_BOOKE) + task->thread.dbcr0 &= ~DBCR0_IC; + task->thread.dbcr0 = DBCR0_IDM | DBCR0_BT; + regs->msr |= MSR_DE; +#else + regs->msr &= ~MSR_SE; + regs->msr |= MSR_BE; +#endif + } + set_tsk_thread_flag(task, TIF_SINGLESTEP); +} + void user_disable_single_step(struct task_struct *task) { struct pt_regs *regs = task->thread.regs; @@ -726,10 +745,10 @@ void user_disable_single_step(struct task_struct *task) if (regs != NULL) { #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) - task->thread.dbcr0 &= ~(DBCR0_IC | DBCR0_IDM); + task->thread.dbcr0 &= ~(DBCR0_IC | DBCR0_BT | DBCR0_IDM); regs->msr &= ~MSR_DE; #else - regs->msr &= ~MSR_SE; + regs->msr &= ~(MSR_SE | MSR_BE); #endif } clear_tsk_thread_flag(task, TIF_SINGLESTEP); diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c index 8869001ab5d7..54e66da8f743 100644 --- a/arch/powerpc/kernel/rtas_pci.c +++ b/arch/powerpc/kernel/rtas_pci.c @@ -93,10 +93,7 @@ static int rtas_pci_read_config(struct pci_bus *bus, { struct device_node *busdn, *dn; - if (bus->self) - busdn = pci_device_to_OF_node(bus->self); - else - busdn = bus->sysdata; /* must be a phb */ + busdn = pci_bus_to_OF_node(bus); /* Search only direct children of the bus */ for (dn = busdn->child; dn; dn = dn->sibling) { @@ -140,10 +137,7 @@ static int rtas_pci_write_config(struct pci_bus *bus, { struct device_node *busdn, *dn; - if (bus->self) - busdn = pci_device_to_OF_node(bus->self); - else - busdn = bus->sysdata; /* must be a phb */ + busdn = pci_bus_to_OF_node(bus); /* Search only direct children of the bus */ for (dn = busdn->child; dn; dn = dn->sibling) { diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 9e1ca745d8f0..1d154248cf40 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -39,6 +39,7 @@ #include <asm/serial.h> #include <asm/udbg.h> #include <asm/mmu_context.h> +#include <asm/swiotlb.h> #include "setup.h" @@ -332,6 +333,11 @@ void __init setup_arch(char **cmdline_p) ppc_md.setup_arch(); if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); +#ifdef CONFIG_SWIOTLB + if (ppc_swiotlb_enable) + swiotlb_init(); +#endif + paging_init(); /* Initialize the MMU context management stuff */ diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index c410c606955d..f46548e66045 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -61,6 +61,7 @@ #include <asm/xmon.h> #include <asm/udbg.h> #include <asm/kexec.h> +#include <asm/swiotlb.h> #include "setup.h" @@ -417,9 +418,11 @@ void __init setup_system(void) if (ppc64_caches.iline_size != 0x80) printk("ppc64_caches.icache_line_size = 0x%x\n", ppc64_caches.iline_size); +#ifdef CONFIG_PPC_STD_MMU_64 if (htab_address) printk("htab_address = 0x%p\n", htab_address); printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); +#endif /* CONFIG_PPC_STD_MMU_64 */ if (PHYSICAL_START > 0) printk("physical_start = 0x%lx\n", PHYSICAL_START); @@ -511,8 +514,9 @@ void __init setup_arch(char **cmdline_p) irqstack_early_init(); emergency_stack_init(); +#ifdef CONFIG_PPC_STD_MMU_64 stabs_alloc(); - +#endif /* set up the bootmem stuff with available memory */ do_init_bootmem(); sparse_init(); @@ -524,6 +528,11 @@ void __init setup_arch(char **cmdline_p) if (ppc_md.setup_arch) ppc_md.setup_arch(); +#ifdef CONFIG_SWIOTLB + if (ppc_swiotlb_enable) + swiotlb_init(); +#endif + paging_init(); ppc64_boot_msg(0x15, "Setup Done"); } diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 48571ac56fb7..bee1443da763 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -109,7 +109,7 @@ static void decrementer_set_mode(enum clock_event_mode mode, static struct clock_event_device decrementer_clockevent = { .name = "decrementer", .rating = 200, - .shift = 16, + .shift = 0, /* To be filled in */ .mult = 0, /* To be filled in */ .irq = 0, .set_next_event = decrementer_set_next_event, @@ -843,6 +843,22 @@ static void decrementer_set_mode(enum clock_event_mode mode, decrementer_set_next_event(DECREMENTER_MAX, dev); } +static void __init setup_clockevent_multiplier(unsigned long hz) +{ + u64 mult, shift = 32; + + while (1) { + mult = div_sc(hz, NSEC_PER_SEC, shift); + if (mult && (mult >> 32UL) == 0UL) + break; + + shift--; + } + + decrementer_clockevent.shift = shift; + decrementer_clockevent.mult = mult; +} + static void register_decrementer_clockevent(int cpu) { struct clock_event_device *dec = &per_cpu(decrementers, cpu).event; @@ -860,8 +876,7 @@ static void __init init_decrementer_clockevent(void) { int cpu = smp_processor_id(); - decrementer_clockevent.mult = div_sc(ppc_tb_freq, NSEC_PER_SEC, - decrementer_clockevent.shift); + setup_clockevent_multiplier(ppc_tb_freq); decrementer_clockevent.max_delta_ns = clockevent_delta2ns(DECREMENTER_MAX, &decrementer_clockevent); decrementer_clockevent.min_delta_ns = diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 678fbff0d206..6f0ae1a9bfae 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -33,7 +33,9 @@ #include <linux/backlight.h> #include <linux/bug.h> #include <linux/kdebug.h> +#include <linux/debugfs.h> +#include <asm/emulated_ops.h> #include <asm/pgtable.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -757,36 +759,44 @@ static int emulate_instruction(struct pt_regs *regs) /* Emulate the mfspr rD, PVR. */ if ((instword & PPC_INST_MFSPR_PVR_MASK) == PPC_INST_MFSPR_PVR) { + PPC_WARN_EMULATED(mfpvr); rd = (instword >> 21) & 0x1f; regs->gpr[rd] = mfspr(SPRN_PVR); return 0; } /* Emulating the dcba insn is just a no-op. */ - if ((instword & PPC_INST_DCBA_MASK) == PPC_INST_DCBA) + if ((instword & PPC_INST_DCBA_MASK) == PPC_INST_DCBA) { + PPC_WARN_EMULATED(dcba); return 0; + } /* Emulate the mcrxr insn. */ if ((instword & PPC_INST_MCRXR_MASK) == PPC_INST_MCRXR) { int shift = (instword >> 21) & 0x1c; unsigned long msk = 0xf0000000UL >> shift; + PPC_WARN_EMULATED(mcrxr); regs->ccr = (regs->ccr & ~msk) | ((regs->xer >> shift) & msk); regs->xer &= ~0xf0000000UL; return 0; } /* Emulate load/store string insn. */ - if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING) + if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING) { + PPC_WARN_EMULATED(string); return emulate_string_inst(regs, instword); + } /* Emulate the popcntb (Population Count Bytes) instruction. */ if ((instword & PPC_INST_POPCNTB_MASK) == PPC_INST_POPCNTB) { + PPC_WARN_EMULATED(popcntb); return emulate_popcntb_inst(regs, instword); } /* Emulate isel (Integer Select) instruction */ if ((instword & PPC_INST_ISEL_MASK) == PPC_INST_ISEL) { + PPC_WARN_EMULATED(isel); return emulate_isel(regs, instword); } @@ -984,6 +994,8 @@ void SoftwareEmulation(struct pt_regs *regs) #ifdef CONFIG_MATH_EMULATION errcode = do_mathemu(regs); + if (errcode >= 0) + PPC_WARN_EMULATED(math); switch (errcode) { case 0: @@ -1005,6 +1017,9 @@ void SoftwareEmulation(struct pt_regs *regs) #elif defined(CONFIG_8XX_MINIMAL_FPEMU) errcode = Soft_emulate_8xx(regs); + if (errcode >= 0) + PPC_WARN_EMULATED(8xx); + switch (errcode) { case 0: emulate_single_step(regs); @@ -1026,7 +1041,34 @@ void SoftwareEmulation(struct pt_regs *regs) void __kprobes DebugException(struct pt_regs *regs, unsigned long debug_status) { - if (debug_status & DBSR_IC) { /* instruction completion */ + /* Hack alert: On BookE, Branch Taken stops on the branch itself, while + * on server, it stops on the target of the branch. In order to simulate + * the server behaviour, we thus restart right away with a single step + * instead of stopping here when hitting a BT + */ + if (debug_status & DBSR_BT) { + regs->msr &= ~MSR_DE; + + /* Disable BT */ + mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_BT); + /* Clear the BT event */ + mtspr(SPRN_DBSR, DBSR_BT); + + /* Do the single step trick only when coming from userspace */ + if (user_mode(regs)) { + current->thread.dbcr0 &= ~DBCR0_BT; + current->thread.dbcr0 |= DBCR0_IDM | DBCR0_IC; + regs->msr |= MSR_DE; + return; + } + + if (notify_die(DIE_SSTEP, "block_step", regs, 5, + 5, SIGTRAP) == NOTIFY_STOP) { + return; + } + if (debugger_sstep(regs)) + return; + } else if (debug_status & DBSR_IC) { /* Instruction complete */ regs->msr &= ~MSR_DE; /* Disable instruction completion */ @@ -1042,9 +1084,8 @@ void __kprobes DebugException(struct pt_regs *regs, unsigned long debug_status) if (debugger_sstep(regs)) return; - if (user_mode(regs)) { - current->thread.dbcr0 &= ~DBCR0_IC; - } + if (user_mode(regs)) + current->thread.dbcr0 &= ~(DBCR0_IC); _exception(SIGTRAP, regs, TRAP_TRACE, regs->nip); } else if (debug_status & (DBSR_DAC1R | DBSR_DAC1W)) { @@ -1088,6 +1129,7 @@ void altivec_assist_exception(struct pt_regs *regs) flush_altivec_to_thread(current); + PPC_WARN_EMULATED(altivec); err = emulate_altivec(regs); if (err == 0) { regs->nip += 4; /* skip emulated instruction */ @@ -1286,3 +1328,79 @@ void kernel_bad_stack(struct pt_regs *regs) void __init trap_init(void) { } + + +#ifdef CONFIG_PPC_EMULATED_STATS + +#define WARN_EMULATED_SETUP(type) .type = { .name = #type } + +struct ppc_emulated ppc_emulated = { +#ifdef CONFIG_ALTIVEC + WARN_EMULATED_SETUP(altivec), +#endif + WARN_EMULATED_SETUP(dcba), + WARN_EMULATED_SETUP(dcbz), + WARN_EMULATED_SETUP(fp_pair), + WARN_EMULATED_SETUP(isel), + WARN_EMULATED_SETUP(mcrxr), + WARN_EMULATED_SETUP(mfpvr), + WARN_EMULATED_SETUP(multiple), + WARN_EMULATED_SETUP(popcntb), + WARN_EMULATED_SETUP(spe), + WARN_EMULATED_SETUP(string), + WARN_EMULATED_SETUP(unaligned), +#ifdef CONFIG_MATH_EMULATION + WARN_EMULATED_SETUP(math), +#elif defined(CONFIG_8XX_MINIMAL_FPEMU) + WARN_EMULATED_SETUP(8xx), +#endif +#ifdef CONFIG_VSX + WARN_EMULATED_SETUP(vsx), +#endif +}; + +u32 ppc_warn_emulated; + +void ppc_warn_emulated_print(const char *type) +{ + if (printk_ratelimit()) + pr_warning("%s used emulated %s instruction\n", current->comm, + type); +} + +static int __init ppc_warn_emulated_init(void) +{ + struct dentry *dir, *d; + unsigned int i; + struct ppc_emulated_entry *entries = (void *)&ppc_emulated; + + if (!powerpc_debugfs_root) + return -ENODEV; + + dir = debugfs_create_dir("emulated_instructions", + powerpc_debugfs_root); + if (!dir) + return -ENOMEM; + + d = debugfs_create_u32("do_warn", S_IRUGO | S_IWUSR, dir, + &ppc_warn_emulated); + if (!d) + goto fail; + + for (i = 0; i < sizeof(ppc_emulated)/sizeof(*entries); i++) { + d = debugfs_create_u32(entries[i].name, S_IRUGO | S_IWUSR, dir, + (u32 *)&entries[i].val.counter); + if (!d) + goto fail; + } + + return 0; + +fail: + debugfs_remove_recursive(dir); + return -ENOMEM; +} + +device_initcall(ppc_warn_emulated_init); + +#endif /* CONFIG_PPC_EMULATED_STATS */ diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index 49ac3d6e1399..ef36cbbc5882 100644 --- a/arch/powerpc/kernel/vector.S +++ b/arch/powerpc/kernel/vector.S @@ -1,5 +1,215 @@ +#include <asm/processor.h> #include <asm/ppc_asm.h> #include <asm/reg.h> +#include <asm/asm-offsets.h> +#include <asm/cputable.h> +#include <asm/thread_info.h> +#include <asm/page.h> + +/* + * load_up_altivec(unused, unused, tsk) + * Disable VMX for the task which had it previously, + * and save its vector registers in its thread_struct. + * Enables the VMX for use in the kernel on return. + * On SMP we know the VMX is free, since we give it up every + * switch (ie, no lazy save of the vector registers). + */ +_GLOBAL(load_up_altivec) + mfmsr r5 /* grab the current MSR */ + oris r5,r5,MSR_VEC@h + MTMSRD(r5) /* enable use of AltiVec now */ + isync + +/* + * For SMP, we don't do lazy VMX switching because it just gets too + * horrendously complex, especially when a task switches from one CPU + * to another. Instead we call giveup_altvec in switch_to. + * VRSAVE isn't dealt with here, that is done in the normal context + * switch code. Note that we could rely on vrsave value to eventually + * avoid saving all of the VREGs here... + */ +#ifndef CONFIG_SMP + LOAD_REG_ADDRBASE(r3, last_task_used_altivec) + toreal(r3) + PPC_LL r4,ADDROFF(last_task_used_altivec)(r3) + PPC_LCMPI 0,r4,0 + beq 1f + + /* Save VMX state to last_task_used_altivec's THREAD struct */ + toreal(r4) + addi r4,r4,THREAD + SAVE_32VRS(0,r5,r4) + mfvscr vr0 + li r10,THREAD_VSCR + stvx vr0,r10,r4 + /* Disable VMX for last_task_used_altivec */ + PPC_LL r5,PT_REGS(r4) + toreal(r5) + PPC_LL r4,_MSR-STACK_FRAME_OVERHEAD(r5) + lis r10,MSR_VEC@h + andc r4,r4,r10 + PPC_STL r4,_MSR-STACK_FRAME_OVERHEAD(r5) +1: +#endif /* CONFIG_SMP */ + + /* Hack: if we get an altivec unavailable trap with VRSAVE + * set to all zeros, we assume this is a broken application + * that fails to set it properly, and thus we switch it to + * all 1's + */ + mfspr r4,SPRN_VRSAVE + cmpdi 0,r4,0 + bne+ 1f + li r4,-1 + mtspr SPRN_VRSAVE,r4 +1: + /* enable use of VMX after return */ +#ifdef CONFIG_PPC32 + mfspr r5,SPRN_SPRG3 /* current task's THREAD (phys) */ + oris r9,r9,MSR_VEC@h +#else + ld r4,PACACURRENT(r13) + addi r5,r4,THREAD /* Get THREAD */ + oris r12,r12,MSR_VEC@h + std r12,_MSR(r1) +#endif + li r4,1 + li r10,THREAD_VSCR + stw r4,THREAD_USED_VR(r5) + lvx vr0,r10,r5 + mtvscr vr0 + REST_32VRS(0,r4,r5) +#ifndef CONFIG_SMP + /* Update last_task_used_math to 'current' */ + subi r4,r5,THREAD /* Back to 'current' */ + fromreal(r4) + PPC_STL r4,ADDROFF(last_task_used_math)(r3) +#endif /* CONFIG_SMP */ + /* restore registers and return */ + blr + +/* + * giveup_altivec(tsk) + * Disable VMX for the task given as the argument, + * and save the vector registers in its thread_struct. + * Enables the VMX for use in the kernel on return. + */ +_GLOBAL(giveup_altivec) + mfmsr r5 + oris r5,r5,MSR_VEC@h + SYNC + MTMSRD(r5) /* enable use of VMX now */ + isync + PPC_LCMPI 0,r3,0 + beqlr- /* if no previous owner, done */ + addi r3,r3,THREAD /* want THREAD of task */ + PPC_LL r5,PT_REGS(r3) + PPC_LCMPI 0,r5,0 + SAVE_32VRS(0,r4,r3) + mfvscr vr0 + li r4,THREAD_VSCR + stvx vr0,r4,r3 + beq 1f + PPC_LL r4,_MSR-STACK_FRAME_OVERHEAD(r5) +#ifdef CONFIG_VSX +BEGIN_FTR_SECTION + lis r3,(MSR_VEC|MSR_VSX)@h +FTR_SECTION_ELSE + lis r3,MSR_VEC@h +ALT_FTR_SECTION_END_IFSET(CPU_FTR_VSX) +#else + lis r3,MSR_VEC@h +#endif + andc r4,r4,r3 /* disable FP for previous task */ + PPC_STL r4,_MSR-STACK_FRAME_OVERHEAD(r5) +1: +#ifndef CONFIG_SMP + li r5,0 + LOAD_REG_ADDRBASE(r4,last_task_used_altivec) + PPC_STL r5,ADDROFF(last_task_used_altivec)(r4) +#endif /* CONFIG_SMP */ + blr + +#ifdef CONFIG_VSX + +#ifdef CONFIG_PPC32 +#error This asm code isn't ready for 32-bit kernels +#endif + +/* + * load_up_vsx(unused, unused, tsk) + * Disable VSX for the task which had it previously, + * and save its vector registers in its thread_struct. + * Reuse the fp and vsx saves, but first check to see if they have + * been saved already. + */ +_GLOBAL(load_up_vsx) +/* Load FP and VSX registers if they haven't been done yet */ + andi. r5,r12,MSR_FP + beql+ load_up_fpu /* skip if already loaded */ + andis. r5,r12,MSR_VEC@h + beql+ load_up_altivec /* skip if already loaded */ + +#ifndef CONFIG_SMP + ld r3,last_task_used_vsx@got(r2) + ld r4,0(r3) + cmpdi 0,r4,0 + beq 1f + /* Disable VSX for last_task_used_vsx */ + addi r4,r4,THREAD + ld r5,PT_REGS(r4) + ld r4,_MSR-STACK_FRAME_OVERHEAD(r5) + lis r6,MSR_VSX@h + andc r6,r4,r6 + std r6,_MSR-STACK_FRAME_OVERHEAD(r5) +1: +#endif /* CONFIG_SMP */ + ld r4,PACACURRENT(r13) + addi r4,r4,THREAD /* Get THREAD */ + li r6,1 + stw r6,THREAD_USED_VSR(r4) /* ... also set thread used vsr */ + /* enable use of VSX after return */ + oris r12,r12,MSR_VSX@h + std r12,_MSR(r1) +#ifndef CONFIG_SMP + /* Update last_task_used_math to 'current' */ + ld r4,PACACURRENT(r13) + std r4,0(r3) +#endif /* CONFIG_SMP */ + b fast_exception_return + +/* + * __giveup_vsx(tsk) + * Disable VSX for the task given as the argument. + * Does NOT save vsx registers. + * Enables the VSX for use in the kernel on return. + */ +_GLOBAL(__giveup_vsx) + mfmsr r5 + oris r5,r5,MSR_VSX@h + mtmsrd r5 /* enable use of VSX now */ + isync + + cmpdi 0,r3,0 + beqlr- /* if no previous owner, done */ + addi r3,r3,THREAD /* want THREAD of task */ + ld r5,PT_REGS(r3) + cmpdi 0,r5,0 + beq 1f + ld r4,_MSR-STACK_FRAME_OVERHEAD(r5) + lis r3,MSR_VSX@h + andc r4,r4,r3 /* disable VSX for previous task */ + std r4,_MSR-STACK_FRAME_OVERHEAD(r5) +1: +#ifndef CONFIG_SMP + li r5,0 + ld r4,last_task_used_vsx@got(r2) + std r5,0(r4) +#endif /* CONFIG_SMP */ + blr + +#endif /* CONFIG_VSX */ + /* * The routines below are in assembler so we can closely control the |