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-rw-r--r--arch/arm/kernel/Makefile5
-rw-r--r--arch/arm/kernel/asm-offsets.c3
-rw-r--r--arch/arm/kernel/compat.c7
-rw-r--r--arch/arm/kernel/compat.h2
-rw-r--r--arch/arm/kernel/crash_dump.c60
-rw-r--r--arch/arm/kernel/entry-armv.S29
-rw-r--r--arch/arm/kernel/entry-common.S124
-rw-r--r--arch/arm/kernel/etm.c4
-rw-r--r--arch/arm/kernel/irq.c41
-rw-r--r--arch/arm/kernel/kgdb.c124
-rw-r--r--arch/arm/kernel/machine_kexec.c14
-rw-r--r--arch/arm/kernel/module.c34
-rw-r--r--arch/arm/kernel/perf_event.c18
-rw-r--r--arch/arm/kernel/process.c42
-rw-r--r--arch/arm/kernel/ptrace.c96
-rw-r--r--arch/arm/kernel/relocate_kernel.S6
-rw-r--r--arch/arm/kernel/setup.c111
-rw-r--r--arch/arm/kernel/smp.c17
-rw-r--r--arch/arm/kernel/smp_twd.c3
-rw-r--r--arch/arm/kernel/sys_arm.c4
-rw-r--r--arch/arm/kernel/sys_oabi-compat.c6
-rw-r--r--arch/arm/kernel/tcm.c118
-rw-r--r--arch/arm/kernel/traps.c41
23 files changed, 694 insertions, 215 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 26d302c28e13..980b78e31328 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -13,10 +13,12 @@ CFLAGS_REMOVE_return_address.o = -pg
# Object file lists.
-obj-y := compat.o elf.o entry-armv.o entry-common.o irq.o \
+obj-y := elf.o entry-armv.o entry-common.o irq.o \
process.o ptrace.o return_address.o setup.o signal.o \
sys_arm.o stacktrace.o time.o traps.o
+obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += compat.o
+
obj-$(CONFIG_LEDS) += leds.o
obj-$(CONFIG_OC_ETM) += etm.o
@@ -39,6 +41,7 @@ obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_ARM_UNWIND) += unwind.o
obj-$(CONFIG_HAVE_TCM) += tcm.o
+obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_CRUNCH) += crunch.o crunch-bits.o
AFLAGS_crunch-bits.o := -Wa,-mcpu=ep9312
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 883511522fca..85f2a019f77b 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -40,6 +40,9 @@
int main(void)
{
DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
+#ifdef CONFIG_CC_STACKPROTECTOR
+ DEFINE(TSK_STACK_CANARY, offsetof(struct task_struct, stack_canary));
+#endif
BLANK();
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
diff --git a/arch/arm/kernel/compat.c b/arch/arm/kernel/compat.c
index 0a1385442f43..925652318b8b 100644
--- a/arch/arm/kernel/compat.c
+++ b/arch/arm/kernel/compat.c
@@ -217,10 +217,3 @@ void __init convert_to_tag_list(struct tag *tags)
struct param_struct *params = (struct param_struct *)tags;
build_tag_list(params, &params->u2);
}
-
-void __init squash_mem_tags(struct tag *tag)
-{
- for (; tag->hdr.size; tag = tag_next(tag))
- if (tag->hdr.tag == ATAG_MEM)
- tag->hdr.tag = ATAG_NONE;
-}
diff --git a/arch/arm/kernel/compat.h b/arch/arm/kernel/compat.h
index 27e61a68bd1c..39264ab1b9c6 100644
--- a/arch/arm/kernel/compat.h
+++ b/arch/arm/kernel/compat.h
@@ -9,5 +9,3 @@
*/
extern void convert_to_tag_list(struct tag *tags);
-
-extern void squash_mem_tags(struct tag *tag);
diff --git a/arch/arm/kernel/crash_dump.c b/arch/arm/kernel/crash_dump.c
new file mode 100644
index 000000000000..cd3b853a8a6d
--- /dev/null
+++ b/arch/arm/kernel/crash_dump.c
@@ -0,0 +1,60 @@
+/*
+ * arch/arm/kernel/crash_dump.c
+ *
+ * Copyright (C) 2010 Nokia Corporation.
+ * Author: Mika Westerberg
+ *
+ * This code is taken from arch/x86/kernel/crash_dump_64.c
+ * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
+ * Copyright (C) IBM Corporation, 2004. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/errno.h>
+#include <linux/crash_dump.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+/* stores the physical address of elf header of crash image */
+unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
+
+/**
+ * copy_oldmem_page() - copy one page from old kernel memory
+ * @pfn: page frame number to be copied
+ * @buf: buffer where the copied page is placed
+ * @csize: number of bytes to copy
+ * @offset: offset in bytes into the page
+ * @userbuf: if set, @buf is int he user address space
+ *
+ * This function copies one page from old kernel memory into buffer pointed by
+ * @buf. If @buf is in userspace, set @userbuf to %1. Returns number of bytes
+ * copied or negative error in case of failure.
+ */
+ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
+ size_t csize, unsigned long offset,
+ int userbuf)
+{
+ void *vaddr;
+
+ if (!csize)
+ return 0;
+
+ vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE);
+ if (!vaddr)
+ return -ENOMEM;
+
+ if (userbuf) {
+ if (copy_to_user(buf, vaddr + offset, csize)) {
+ iounmap(vaddr);
+ return -EFAULT;
+ }
+ } else {
+ memcpy(buf, vaddr + offset, csize);
+ }
+
+ iounmap(vaddr);
+ return csize;
+}
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 3fd7861de4d1..bb8e93a76407 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -22,6 +22,7 @@
#include <asm/thread_notify.h>
#include <asm/unwind.h>
#include <asm/unistd.h>
+#include <asm/tls.h>
#include "entry-header.S"
@@ -735,11 +736,11 @@ ENTRY(__switch_to)
#ifdef CONFIG_MMU
ldr r6, [r2, #TI_CPU_DOMAIN]
#endif
-#if defined(CONFIG_HAS_TLS_REG)
- mcr p15, 0, r3, c13, c0, 3 @ set TLS register
-#elif !defined(CONFIG_TLS_REG_EMUL)
- mov r4, #0xffff0fff
- str r3, [r4, #-15] @ TLS val at 0xffff0ff0
+ set_tls r3, r4, r5
+#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP)
+ ldr r7, [r2, #TI_TASK]
+ ldr r8, =__stack_chk_guard
+ ldr r7, [r7, #TSK_STACK_CANARY]
#endif
#ifdef CONFIG_MMU
mcr p15, 0, r6, c3, c0, 0 @ Set domain register
@@ -749,6 +750,9 @@ ENTRY(__switch_to)
ldr r0, =thread_notify_head
mov r1, #THREAD_NOTIFY_SWITCH
bl atomic_notifier_call_chain
+#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP)
+ str r7, [r8]
+#endif
THUMB( mov ip, r4 )
mov r0, r5
ARM( ldmia r4, {r4 - sl, fp, sp, pc} ) @ Load all regs saved previously
@@ -1005,17 +1009,12 @@ kuser_cmpxchg_fixup:
*/
__kuser_get_tls: @ 0xffff0fe0
-
-#if !defined(CONFIG_HAS_TLS_REG) && !defined(CONFIG_TLS_REG_EMUL)
- ldr r0, [pc, #(16 - 8)] @ TLS stored at 0xffff0ff0
-#else
- mrc p15, 0, r0, c13, c0, 3 @ read TLS register
-#endif
+ ldr r0, [pc, #(16 - 8)] @ read TLS, set in kuser_get_tls_init
usr_ret lr
-
- .rep 5
- .word 0 @ pad up to __kuser_helper_version
- .endr
+ mrc p15, 0, r0, c13, c0, 3 @ 0xffff0fe8 hardware TLS code
+ .rep 4
+ .word 0 @ 0xffff0ff0 software TLS value, then
+ .endr @ pad up to __kuser_helper_version
/*
* Reference declaration:
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 2c1db77d7848..f05a35a59694 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -92,75 +92,111 @@ ENDPROC(ret_from_fork)
#define CALL(x) .long x
#ifdef CONFIG_FUNCTION_TRACER
+/*
+ * When compiling with -pg, gcc inserts a call to the mcount routine at the
+ * start of every function. In mcount, apart from the function's address (in
+ * lr), we need to get hold of the function's caller's address.
+ *
+ * Older GCCs (pre-4.4) inserted a call to a routine called mcount like this:
+ *
+ * bl mcount
+ *
+ * These versions have the limitation that in order for the mcount routine to
+ * be able to determine the function's caller's address, an APCS-style frame
+ * pointer (which is set up with something like the code below) is required.
+ *
+ * mov ip, sp
+ * push {fp, ip, lr, pc}
+ * sub fp, ip, #4
+ *
+ * With EABI, these frame pointers are not available unless -mapcs-frame is
+ * specified, and if building as Thumb-2, not even then.
+ *
+ * Newer GCCs (4.4+) solve this problem by introducing a new version of mcount,
+ * with call sites like:
+ *
+ * push {lr}
+ * bl __gnu_mcount_nc
+ *
+ * With these compilers, frame pointers are not necessary.
+ *
+ * mcount can be thought of as a function called in the middle of a subroutine
+ * call. As such, it needs to be transparent for both the caller and the
+ * callee: the original lr needs to be restored when leaving mcount, and no
+ * registers should be clobbered. (In the __gnu_mcount_nc implementation, we
+ * clobber the ip register. This is OK because the ARM calling convention
+ * allows it to be clobbered in subroutines and doesn't use it to hold
+ * parameters.)
+ */
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(mcount)
- stmdb sp!, {r0-r3, lr}
- mov r0, lr
- sub r0, r0, #MCOUNT_INSN_SIZE
+ stmdb sp!, {r0-r3, lr}
+ mov r0, lr
+ sub r0, r0, #MCOUNT_INSN_SIZE
.globl mcount_call
mcount_call:
- bl ftrace_stub
- ldr lr, [fp, #-4] @ restore lr
- ldmia sp!, {r0-r3, pc}
+ bl ftrace_stub
+ ldr lr, [fp, #-4] @ restore lr
+ ldmia sp!, {r0-r3, pc}
ENTRY(ftrace_caller)
- stmdb sp!, {r0-r3, lr}
- ldr r1, [fp, #-4]
- mov r0, lr
- sub r0, r0, #MCOUNT_INSN_SIZE
+ stmdb sp!, {r0-r3, lr}
+ ldr r1, [fp, #-4]
+ mov r0, lr
+ sub r0, r0, #MCOUNT_INSN_SIZE
.globl ftrace_call
ftrace_call:
- bl ftrace_stub
- ldr lr, [fp, #-4] @ restore lr
- ldmia sp!, {r0-r3, pc}
+ bl ftrace_stub
+ ldr lr, [fp, #-4] @ restore lr
+ ldmia sp!, {r0-r3, pc}
#else
ENTRY(__gnu_mcount_nc)
- stmdb sp!, {r0-r3, lr}
- ldr r0, =ftrace_trace_function
- ldr r2, [r0]
- adr r0, ftrace_stub
- cmp r0, r2
- bne gnu_trace
- ldmia sp!, {r0-r3, ip, lr}
- mov pc, ip
+ stmdb sp!, {r0-r3, lr}
+ ldr r0, =ftrace_trace_function
+ ldr r2, [r0]
+ adr r0, ftrace_stub
+ cmp r0, r2
+ bne gnu_trace
+ ldmia sp!, {r0-r3, ip, lr}
+ mov pc, ip
gnu_trace:
- ldr r1, [sp, #20] @ lr of instrumented routine
- mov r0, lr
- sub r0, r0, #MCOUNT_INSN_SIZE
- mov lr, pc
- mov pc, r2
- ldmia sp!, {r0-r3, ip, lr}
- mov pc, ip
+ ldr r1, [sp, #20] @ lr of instrumented routine
+ mov r0, lr
+ sub r0, r0, #MCOUNT_INSN_SIZE
+ mov lr, pc
+ mov pc, r2
+ ldmia sp!, {r0-r3, ip, lr}
+ mov pc, ip
ENTRY(mcount)
- stmdb sp!, {r0-r3, lr}
- ldr r0, =ftrace_trace_function
- ldr r2, [r0]
- adr r0, ftrace_stub
- cmp r0, r2
- bne trace
- ldr lr, [fp, #-4] @ restore lr
- ldmia sp!, {r0-r3, pc}
+ stmdb sp!, {r0-r3, lr}
+ ldr r0, =ftrace_trace_function
+ ldr r2, [r0]
+ adr r0, ftrace_stub
+ cmp r0, r2
+ bne trace
+ ldr lr, [fp, #-4] @ restore lr
+ ldmia sp!, {r0-r3, pc}
trace:
- ldr r1, [fp, #-4] @ lr of instrumented routine
- mov r0, lr
- sub r0, r0, #MCOUNT_INSN_SIZE
- mov lr, pc
- mov pc, r2
- ldr lr, [fp, #-4] @ restore lr
- ldmia sp!, {r0-r3, pc}
+ ldr r1, [fp, #-4] @ lr of instrumented routine
+ mov r0, lr
+ sub r0, r0, #MCOUNT_INSN_SIZE
+ mov lr, pc
+ mov pc, r2
+ ldr lr, [fp, #-4] @ restore lr
+ ldmia sp!, {r0-r3, pc}
#endif /* CONFIG_DYNAMIC_FTRACE */
.globl ftrace_stub
ftrace_stub:
- mov pc, lr
+ mov pc, lr
#endif /* CONFIG_FUNCTION_TRACER */
diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
index 827753966301..56418f98cd01 100644
--- a/arch/arm/kernel/etm.c
+++ b/arch/arm/kernel/etm.c
@@ -543,7 +543,9 @@ static int __init etm_probe(struct amba_device *dev, struct amba_id *id)
t->etm_portsz = 1;
etm_unlock(t);
- ret = etm_readl(t, CSCR_PRSR);
+ (void)etm_readl(t, ETMMR_PDSR);
+ /* dummy first read */
+ (void)etm_readl(&tracer, ETMMR_OSSRR);
t->ncmppairs = etm_readl(t, ETMR_CONFCODE) & 0xf;
etm_writel(t, 0x440, ETMR_CTRL);
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 3b3d2c80509c..c0d5c3b3a760 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -47,12 +47,14 @@
#define irq_finish(irq) do { } while (0)
#endif
+unsigned int arch_nr_irqs;
void (*init_arch_irq)(void) __initdata = NULL;
unsigned long irq_err_count;
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, cpu;
+ struct irq_desc *desc;
struct irqaction * action;
unsigned long flags;
@@ -67,24 +69,25 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
}
- if (i < NR_IRQS) {
- raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
- action = irq_desc[i].action;
+ if (i < nr_irqs) {
+ desc = irq_to_desc(i);
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ action = desc->action;
if (!action)
goto unlock;
seq_printf(p, "%3d: ", i);
for_each_present_cpu(cpu)
seq_printf(p, "%10u ", kstat_irqs_cpu(i, cpu));
- seq_printf(p, " %10s", irq_desc[i].chip->name ? : "-");
+ seq_printf(p, " %10s", desc->chip->name ? : "-");
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
unlock:
- raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+ } else if (i == nr_irqs) {
#ifdef CONFIG_FIQ
show_fiq_list(p, v);
#endif
@@ -112,7 +115,7 @@ asmlinkage void __exception asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
* Some hardware gives randomly wrong interrupts. Rather
* than crashing, do something sensible.
*/
- if (unlikely(irq >= NR_IRQS)) {
+ if (unlikely(irq >= nr_irqs)) {
if (printk_ratelimit())
printk(KERN_WARNING "Bad IRQ%u\n", irq);
ack_bad_irq(irq);
@@ -132,12 +135,12 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
struct irq_desc *desc;
unsigned long flags;
- if (irq >= NR_IRQS) {
+ if (irq >= nr_irqs) {
printk(KERN_ERR "Trying to set irq flags for IRQ%d\n", irq);
return;
}
- desc = irq_desc + irq;
+ desc = irq_to_desc(irq);
raw_spin_lock_irqsave(&desc->lock, flags);
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
if (iflags & IRQF_VALID)
@@ -151,14 +154,25 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
void __init init_IRQ(void)
{
+ struct irq_desc *desc;
int irq;
- for (irq = 0; irq < NR_IRQS; irq++)
- irq_desc[irq].status |= IRQ_NOREQUEST | IRQ_NOPROBE;
+ for (irq = 0; irq < nr_irqs; irq++) {
+ desc = irq_to_desc_alloc_node(irq, 0);
+ desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
+ }
init_arch_irq();
}
+#ifdef CONFIG_SPARSE_IRQ
+int __init arch_probe_nr_irqs(void)
+{
+ nr_irqs = arch_nr_irqs ? arch_nr_irqs : NR_IRQS;
+ return 0;
+}
+#endif
+
#ifdef CONFIG_HOTPLUG_CPU
static void route_irq(struct irq_desc *desc, unsigned int irq, unsigned int cpu)
@@ -178,10 +192,9 @@ static void route_irq(struct irq_desc *desc, unsigned int irq, unsigned int cpu)
void migrate_irqs(void)
{
unsigned int i, cpu = smp_processor_id();
+ struct irq_desc *desc;
- for (i = 0; i < NR_IRQS; i++) {
- struct irq_desc *desc = irq_desc + i;
-
+ for_each_irq_desc(i, desc) {
if (desc->node == cpu) {
unsigned int newcpu = cpumask_any_and(desc->affinity,
cpu_online_mask);
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index c868a8864117..778c2f7024ff 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -10,57 +10,62 @@
* Deepak Saxena <dsaxena@plexity.net>
*/
#include <linux/irq.h>
+#include <linux/kdebug.h>
#include <linux/kgdb.h>
#include <asm/traps.h>
-/* Make a local copy of the registers passed into the handler (bletch) */
-void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
{
- int regno;
-
- /* Initialize all to zero. */
- for (regno = 0; regno < GDB_MAX_REGS; regno++)
- gdb_regs[regno] = 0;
+ { "r0", 4, offsetof(struct pt_regs, ARM_r0)},
+ { "r1", 4, offsetof(struct pt_regs, ARM_r1)},
+ { "r2", 4, offsetof(struct pt_regs, ARM_r2)},
+ { "r3", 4, offsetof(struct pt_regs, ARM_r3)},
+ { "r4", 4, offsetof(struct pt_regs, ARM_r4)},
+ { "r5", 4, offsetof(struct pt_regs, ARM_r5)},
+ { "r6", 4, offsetof(struct pt_regs, ARM_r6)},
+ { "r7", 4, offsetof(struct pt_regs, ARM_r7)},
+ { "r8", 4, offsetof(struct pt_regs, ARM_r8)},
+ { "r9", 4, offsetof(struct pt_regs, ARM_r9)},
+ { "r10", 4, offsetof(struct pt_regs, ARM_r10)},
+ { "fp", 4, offsetof(struct pt_regs, ARM_fp)},
+ { "ip", 4, offsetof(struct pt_regs, ARM_ip)},
+ { "sp", 4, offsetof(struct pt_regs, ARM_sp)},
+ { "lr", 4, offsetof(struct pt_regs, ARM_lr)},
+ { "pc", 4, offsetof(struct pt_regs, ARM_pc)},
+ { "f0", 12, -1 },
+ { "f1", 12, -1 },
+ { "f2", 12, -1 },
+ { "f3", 12, -1 },
+ { "f4", 12, -1 },
+ { "f5", 12, -1 },
+ { "f6", 12, -1 },
+ { "f7", 12, -1 },
+ { "fps", 4, -1 },
+ { "cpsr", 4, offsetof(struct pt_regs, ARM_cpsr)},
+};
- gdb_regs[_R0] = kernel_regs->ARM_r0;
- gdb_regs[_R1] = kernel_regs->ARM_r1;
- gdb_regs[_R2] = kernel_regs->ARM_r2;
- gdb_regs[_R3] = kernel_regs->ARM_r3;
- gdb_regs[_R4] = kernel_regs->ARM_r4;
- gdb_regs[_R5] = kernel_regs->ARM_r5;
- gdb_regs[_R6] = kernel_regs->ARM_r6;
- gdb_regs[_R7] = kernel_regs->ARM_r7;
- gdb_regs[_R8] = kernel_regs->ARM_r8;
- gdb_regs[_R9] = kernel_regs->ARM_r9;
- gdb_regs[_R10] = kernel_regs->ARM_r10;
- gdb_regs[_FP] = kernel_regs->ARM_fp;
- gdb_regs[_IP] = kernel_regs->ARM_ip;
- gdb_regs[_SPT] = kernel_regs->ARM_sp;
- gdb_regs[_LR] = kernel_regs->ARM_lr;
- gdb_regs[_PC] = kernel_regs->ARM_pc;
- gdb_regs[_CPSR] = kernel_regs->ARM_cpsr;
+char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs)
+{
+ if (regno >= DBG_MAX_REG_NUM || regno < 0)
+ return NULL;
+
+ if (dbg_reg_def[regno].offset != -1)
+ memcpy(mem, (void *)regs + dbg_reg_def[regno].offset,
+ dbg_reg_def[regno].size);
+ else
+ memset(mem, 0, dbg_reg_def[regno].size);
+ return dbg_reg_def[regno].name;
}
-/* Copy local gdb registers back to kgdb regs, for later copy to kernel */
-void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)
{
- kernel_regs->ARM_r0 = gdb_regs[_R0];
- kernel_regs->ARM_r1 = gdb_regs[_R1];
- kernel_regs->ARM_r2 = gdb_regs[_R2];
- kernel_regs->ARM_r3 = gdb_regs[_R3];
- kernel_regs->ARM_r4 = gdb_regs[_R4];
- kernel_regs->ARM_r5 = gdb_regs[_R5];
- kernel_regs->ARM_r6 = gdb_regs[_R6];
- kernel_regs->ARM_r7 = gdb_regs[_R7];
- kernel_regs->ARM_r8 = gdb_regs[_R8];
- kernel_regs->ARM_r9 = gdb_regs[_R9];
- kernel_regs->ARM_r10 = gdb_regs[_R10];
- kernel_regs->ARM_fp = gdb_regs[_FP];
- kernel_regs->ARM_ip = gdb_regs[_IP];
- kernel_regs->ARM_sp = gdb_regs[_SPT];
- kernel_regs->ARM_lr = gdb_regs[_LR];
- kernel_regs->ARM_pc = gdb_regs[_PC];
- kernel_regs->ARM_cpsr = gdb_regs[_CPSR];
+ if (regno >= DBG_MAX_REG_NUM || regno < 0)
+ return -EINVAL;
+
+ if (dbg_reg_def[regno].offset != -1)
+ memcpy((void *)regs + dbg_reg_def[regno].offset, mem,
+ dbg_reg_def[regno].size);
+ return 0;
}
void
@@ -176,6 +181,33 @@ void kgdb_roundup_cpus(unsigned long flags)
local_irq_disable();
}
+static int __kgdb_notify(struct die_args *args, unsigned long cmd)
+{
+ struct pt_regs *regs = args->regs;
+
+ if (kgdb_handle_exception(1, args->signr, cmd, regs))
+ return NOTIFY_DONE;
+ return NOTIFY_STOP;
+}
+static int
+kgdb_notify(struct notifier_block *self, unsigned long cmd, void *ptr)
+{
+ unsigned long flags;
+ int ret;
+
+ local_irq_save(flags);
+ ret = __kgdb_notify(ptr, cmd);
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_notify,
+ .priority = -INT_MAX,
+};
+
+
/**
* kgdb_arch_init - Perform any architecture specific initalization.
*
@@ -184,6 +216,11 @@ void kgdb_roundup_cpus(unsigned long flags)
*/
int kgdb_arch_init(void)
{
+ int ret = register_die_notifier(&kgdb_notifier);
+
+ if (ret != 0)
+ return ret;
+
register_undef_hook(&kgdb_brkpt_hook);
register_undef_hook(&kgdb_compiled_brkpt_hook);
@@ -200,6 +237,7 @@ void kgdb_arch_exit(void)
{
unregister_undef_hook(&kgdb_brkpt_hook);
unregister_undef_hook(&kgdb_compiled_brkpt_hook);
+ unregister_die_notifier(&kgdb_notifier);
}
/*
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index 598ca61e7bca..1fc74cbd1a19 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -37,12 +37,12 @@ void machine_kexec_cleanup(struct kimage *image)
{
}
-void machine_shutdown(void)
-{
-}
-
void machine_crash_shutdown(struct pt_regs *regs)
{
+ local_irq_disable();
+ crash_save_cpu(regs, smp_processor_id());
+
+ printk(KERN_INFO "Loading crashdump kernel...\n");
}
void machine_kexec(struct kimage *image)
@@ -74,7 +74,11 @@ void machine_kexec(struct kimage *image)
(unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
printk(KERN_INFO "Bye!\n");
- cpu_proc_fin();
+ local_irq_disable();
+ local_fiq_disable();
setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
+ flush_cache_all();
+ cpu_proc_fin();
+ flush_cache_all();
cpu_reset(reboot_code_buffer_phys);
}
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index c628bdf6c430..6b4605893f1e 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -102,7 +102,9 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
unsigned long loc;
Elf32_Sym *sym;
s32 offset;
+#ifdef CONFIG_THUMB2_KERNEL
u32 upper, lower, sign, j1, j2;
+#endif
offset = ELF32_R_SYM(rel->r_info);
if (offset < 0 || offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
@@ -185,6 +187,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
(offset & 0x0fff);
break;
+#ifdef CONFIG_THUMB2_KERNEL
case R_ARM_THM_CALL:
case R_ARM_THM_JUMP24:
upper = *(u16 *)loc;
@@ -233,9 +236,40 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
*(u16 *)(loc + 2) = (u16)((lower & 0xd000) |
(j1 << 13) | (j2 << 11) |
((offset >> 1) & 0x07ff));
+ break;
+
+ case R_ARM_THM_MOVW_ABS_NC:
+ case R_ARM_THM_MOVT_ABS:
upper = *(u16 *)loc;
lower = *(u16 *)(loc + 2);
+
+ /*
+ * MOVT/MOVW instructions encoding in Thumb-2:
+ *
+ * i = upper[10]
+ * imm4 = upper[3:0]
+ * imm3 = lower[14:12]
+ * imm8 = lower[7:0]
+ *
+ * imm16 = imm4:i:imm3:imm8
+ */
+ offset = ((upper & 0x000f) << 12) |
+ ((upper & 0x0400) << 1) |
+ ((lower & 0x7000) >> 4) | (lower & 0x00ff);
+ offset = (offset ^ 0x8000) - 0x8000;
+ offset += sym->st_value;
+
+ if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS)
+ offset >>= 16;
+
+ *(u16 *)loc = (u16)((upper & 0xfbf0) |
+ ((offset & 0xf000) >> 12) |
+ ((offset & 0x0800) >> 1));
+ *(u16 *)(loc + 2) = (u16)((lower & 0x8f00) |
+ ((offset & 0x0700) << 4) |
+ (offset & 0x00ff));
break;
+#endif
default:
printk(KERN_ERR "%s: unknown relocation: %u\n",
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index de12536d687f..417c392ddf1c 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -164,20 +164,20 @@ armpmu_event_set_period(struct perf_event *event,
struct hw_perf_event *hwc,
int idx)
{
- s64 left = atomic64_read(&hwc->period_left);
+ s64 left = local64_read(&hwc->period_left);
s64 period = hwc->sample_period;
int ret = 0;
if (unlikely(left <= -period)) {
left = period;
- atomic64_set(&hwc->period_left, left);
+ local64_set(&hwc->period_left, left);
hwc->last_period = period;
ret = 1;
}
if (unlikely(left <= 0)) {
left += period;
- atomic64_set(&hwc->period_left, left);
+ local64_set(&hwc->period_left, left);
hwc->last_period = period;
ret = 1;
}
@@ -185,7 +185,7 @@ armpmu_event_set_period(struct perf_event *event,
if (left > (s64)armpmu->max_period)
left = armpmu->max_period;
- atomic64_set(&hwc->prev_count, (u64)-left);
+ local64_set(&hwc->prev_count, (u64)-left);
armpmu->write_counter(idx, (u64)(-left) & 0xffffffff);
@@ -204,18 +204,18 @@ armpmu_event_update(struct perf_event *event,
u64 delta;
again:
- prev_raw_count = atomic64_read(&hwc->prev_count);
+ prev_raw_count = local64_read(&hwc->prev_count);
new_raw_count = armpmu->read_counter(idx);
- if (atomic64_cmpxchg(&hwc->prev_count, prev_raw_count,
+ if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
new_raw_count) != prev_raw_count)
goto again;
delta = (new_raw_count << shift) - (prev_raw_count << shift);
delta >>= shift;
- atomic64_add(delta, &event->count);
- atomic64_sub(delta, &hwc->period_left);
+ local64_add(delta, &event->count);
+ local64_sub(delta, &hwc->period_left);
return new_raw_count;
}
@@ -478,7 +478,7 @@ __hw_perf_event_init(struct perf_event *event)
if (!hwc->sample_period) {
hwc->sample_period = armpmu->max_period;
hwc->last_period = hwc->sample_period;
- atomic64_set(&hwc->period_left, hwc->sample_period);
+ local64_set(&hwc->period_left, hwc->sample_period);
}
err = 0;
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index a4a9cc88bec7..401e38be1f78 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -28,7 +28,9 @@
#include <linux/tick.h>
#include <linux/utsname.h>
#include <linux/uaccess.h>
+#include <linux/random.h>
+#include <asm/cacheflush.h>
#include <asm/leds.h>
#include <asm/processor.h>
#include <asm/system.h>
@@ -36,6 +38,12 @@
#include <asm/stacktrace.h>
#include <asm/mach/time.h>
+#ifdef CONFIG_CC_STACKPROTECTOR
+#include <linux/stackprotector.h>
+unsigned long __stack_chk_guard __read_mostly;
+EXPORT_SYMBOL(__stack_chk_guard);
+#endif
+
static const char *processor_modes[] = {
"USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
"UK8_26" , "UK9_26" , "UK10_26", "UK11_26", "UK12_26", "UK13_26", "UK14_26", "UK15_26",
@@ -84,10 +92,9 @@ __setup("hlt", hlt_setup);
void arm_machine_restart(char mode, const char *cmd)
{
- /*
- * Clean and disable cache, and turn off interrupts
- */
- cpu_proc_fin();
+ /* Disable interrupts first */
+ local_irq_disable();
+ local_fiq_disable();
/*
* Tell the mm system that we are going to reboot -
@@ -96,6 +103,15 @@ void arm_machine_restart(char mode, const char *cmd)
*/
setup_mm_for_reboot(mode);
+ /* Clean and invalidate caches */
+ flush_cache_all();
+
+ /* Turn off caching */
+ cpu_proc_fin();
+
+ /* Push out any further dirty data, and ensure cache is empty */
+ flush_cache_all();
+
/*
* Now call the architecture specific reboot code.
*/
@@ -189,19 +205,29 @@ int __init reboot_setup(char *str)
__setup("reboot=", reboot_setup);
-void machine_halt(void)
+void machine_shutdown(void)
{
+#ifdef CONFIG_SMP
+ smp_send_stop();
+#endif
}
+void machine_halt(void)
+{
+ machine_shutdown();
+ while (1);
+}
void machine_power_off(void)
{
+ machine_shutdown();
if (pm_power_off)
pm_power_off();
}
void machine_restart(char *cmd)
{
+ machine_shutdown();
arm_pm_restart(reboot_mode, cmd);
}
@@ -426,3 +452,9 @@ unsigned long get_wchan(struct task_struct *p)
} while (count ++ < 16);
return 0;
}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+ unsigned long range_end = mm->brk + 0x02000000;
+ return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+}
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 3f562a7c0a99..f99d489822d5 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -52,6 +52,102 @@
#define BREAKINST_THUMB 0xde01
#endif
+struct pt_regs_offset {
+ const char *name;
+ int offset;
+};
+
+#define REG_OFFSET_NAME(r) \
+ {.name = #r, .offset = offsetof(struct pt_regs, ARM_##r)}
+#define REG_OFFSET_END {.name = NULL, .offset = 0}
+
+static const struct pt_regs_offset regoffset_table[] = {
+ REG_OFFSET_NAME(r0),
+ REG_OFFSET_NAME(r1),
+ REG_OFFSET_NAME(r2),
+ REG_OFFSET_NAME(r3),
+ REG_OFFSET_NAME(r4),
+ REG_OFFSET_NAME(r5),
+ REG_OFFSET_NAME(r6),
+ REG_OFFSET_NAME(r7),
+ REG_OFFSET_NAME(r8),
+ REG_OFFSET_NAME(r9),
+ REG_OFFSET_NAME(r10),
+ REG_OFFSET_NAME(fp),
+ REG_OFFSET_NAME(ip),
+ REG_OFFSET_NAME(sp),
+ REG_OFFSET_NAME(lr),
+ REG_OFFSET_NAME(pc),
+ REG_OFFSET_NAME(cpsr),
+ REG_OFFSET_NAME(ORIG_r0),
+ REG_OFFSET_END,
+};
+
+/**
+ * regs_query_register_offset() - query register offset from its name
+ * @name: the name of a register
+ *
+ * regs_query_register_offset() returns the offset of a register in struct
+ * pt_regs from its name. If the name is invalid, this returns -EINVAL;
+ */
+int regs_query_register_offset(const char *name)
+{
+ const struct pt_regs_offset *roff;
+ for (roff = regoffset_table; roff->name != NULL; roff++)
+ if (!strcmp(roff->name, name))
+ return roff->offset;
+ return -EINVAL;
+}
+
+/**
+ * regs_query_register_name() - query register name from its offset
+ * @offset: the offset of a register in struct pt_regs.
+ *
+ * regs_query_register_name() returns the name of a register from its
+ * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
+ */
+const char *regs_query_register_name(unsigned int offset)
+{
+ const struct pt_regs_offset *roff;
+ for (roff = regoffset_table; roff->name != NULL; roff++)
+ if (roff->offset == offset)
+ return roff->name;
+ return NULL;
+}
+
+/**
+ * regs_within_kernel_stack() - check the address in the stack
+ * @regs: pt_regs which contains kernel stack pointer.
+ * @addr: address which is checked.
+ *
+ * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
+ * If @addr is within the kernel stack, it returns true. If not, returns false.
+ */
+bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr)
+{
+ return ((addr & ~(THREAD_SIZE - 1)) ==
+ (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
+}
+
+/**
+ * regs_get_kernel_stack_nth() - get Nth entry of the stack
+ * @regs: pt_regs which contains kernel stack pointer.
+ * @n: stack entry number.
+ *
+ * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
+ * is specified by @regs. If the @n th entry is NOT in the kernel stack,
+ * this returns 0.
+ */
+unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
+{
+ unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
+ addr += n;
+ if (regs_within_kernel_stack(regs, (unsigned long)addr))
+ return *addr;
+ else
+ return 0;
+}
+
/*
* this routine will get a word off of the processes privileged stack.
* the offset is how far from the base addr as stored in the THREAD.
diff --git a/arch/arm/kernel/relocate_kernel.S b/arch/arm/kernel/relocate_kernel.S
index 61930eb09029..fd26f8d65151 100644
--- a/arch/arm/kernel/relocate_kernel.S
+++ b/arch/arm/kernel/relocate_kernel.S
@@ -10,6 +10,12 @@ relocate_new_kernel:
ldr r0,kexec_indirection_page
ldr r1,kexec_start_address
+ /*
+ * If there is no indirection page (we are doing crashdumps)
+ * skip any relocation.
+ */
+ cmp r0, #0
+ beq 2f
0: /* top, read another word for the indirection page */
ldr r3, [r0],#4
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 122d999bdc7c..d5231ae7355a 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -19,12 +19,15 @@
#include <linux/seq_file.h>
#include <linux/screen_info.h>
#include <linux/init.h>
+#include <linux/kexec.h>
+#include <linux/crash_dump.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/interrupt.h>
#include <linux/smp.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
+#include <linux/memblock.h>
#include <asm/unified.h>
#include <asm/cpu.h>
@@ -44,7 +47,9 @@
#include <asm/traps.h>
#include <asm/unwind.h>
+#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
#include "compat.h"
+#endif
#include "atags.h"
#include "tcm.h"
@@ -269,6 +274,21 @@ static void __init cacheid_init(void)
extern struct proc_info_list *lookup_processor_type(unsigned int);
extern struct machine_desc *lookup_machine_type(unsigned int);
+static void __init feat_v6_fixup(void)
+{
+ int id = read_cpuid_id();
+
+ if ((id & 0xff0f0000) != 0x41070000)
+ return;
+
+ /*
+ * HWCAP_TLS is available only on 1136 r1p0 and later,
+ * see also kuser_get_tls_init.
+ */
+ if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0))
+ elf_hwcap &= ~HWCAP_TLS;
+}
+
static void __init setup_processor(void)
{
struct proc_info_list *list;
@@ -311,6 +331,8 @@ static void __init setup_processor(void)
elf_hwcap &= ~HWCAP_THUMB;
#endif
+ feat_v6_fixup();
+
cacheid_init();
cpu_proc_init();
}
@@ -402,13 +424,12 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
size -= start & ~PAGE_MASK;
bank->start = PAGE_ALIGN(start);
bank->size = size & PAGE_MASK;
- bank->node = PHYS_TO_NID(start);
/*
* Check whether this memory region has non-zero size or
* invalid node number.
*/
- if (bank->size == 0 || bank->node >= MAX_NUMNODES)
+ if (bank->size == 0)
return -EINVAL;
meminfo.nr_banks++;
@@ -663,6 +684,86 @@ static int __init customize_machine(void)
}
arch_initcall(customize_machine);
+#ifdef CONFIG_KEXEC
+static inline unsigned long long get_total_mem(void)
+{
+ unsigned long total;
+
+ total = max_low_pfn - min_low_pfn;
+ return total << PAGE_SHIFT;
+}
+
+/**
+ * reserve_crashkernel() - reserves memory are for crash kernel
+ *
+ * This function reserves memory area given in "crashkernel=" kernel command
+ * line parameter. The memory reserved is used by a dump capture kernel when
+ * primary kernel is crashing.
+ */
+static void __init reserve_crashkernel(void)
+{
+ unsigned long long crash_size, crash_base;
+ unsigned long long total_mem;
+ int ret;
+
+ total_mem = get_total_mem();
+ ret = parse_crashkernel(boot_command_line, total_mem,
+ &crash_size, &crash_base);
+ if (ret)
+ return;
+
+ ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
+ if (ret < 0) {
+ printk(KERN_WARNING "crashkernel reservation failed - "
+ "memory is in use (0x%lx)\n", (unsigned long)crash_base);
+ return;
+ }
+
+ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
+ "for crashkernel (System RAM: %ldMB)\n",
+ (unsigned long)(crash_size >> 20),
+ (unsigned long)(crash_base >> 20),
+ (unsigned long)(total_mem >> 20));
+
+ crashk_res.start = crash_base;
+ crashk_res.end = crash_base + crash_size - 1;
+ insert_resource(&iomem_resource, &crashk_res);
+}
+#else
+static inline void reserve_crashkernel(void) {}
+#endif /* CONFIG_KEXEC */
+
+/*
+ * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
+ * is_kdump_kernel() to determine if we are booting after a panic. Hence
+ * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
+ */
+
+#ifdef CONFIG_CRASH_DUMP
+/*
+ * elfcorehdr= specifies the location of elf core header stored by the crashed
+ * kernel. This option will be passed by kexec loader to the capture kernel.
+ */
+static int __init setup_elfcorehdr(char *arg)
+{
+ char *end;
+
+ if (!arg)
+ return -EINVAL;
+
+ elfcorehdr_addr = memparse(arg, &end);
+ return end > arg ? 0 : -EINVAL;
+}
+early_param("elfcorehdr", setup_elfcorehdr);
+#endif /* CONFIG_CRASH_DUMP */
+
+static void __init squash_mem_tags(struct tag *tag)
+{
+ for (; tag->hdr.size; tag = tag_next(tag))
+ if (tag->hdr.tag == ATAG_MEM)
+ tag->hdr.tag = ATAG_NONE;
+}
+
void __init setup_arch(char **cmdline_p)
{
struct tag *tags = (struct tag *)&init_tags;
@@ -683,12 +784,14 @@ void __init setup_arch(char **cmdline_p)
else if (mdesc->boot_params)
tags = phys_to_virt(mdesc->boot_params);
+#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
/*
* If we have the old style parameters, convert them to
* a tag list.
*/
if (tags->hdr.tag != ATAG_CORE)
convert_to_tag_list(tags);
+#endif
if (tags->hdr.tag != ATAG_CORE)
tags = (struct tag *)&init_tags;
@@ -716,12 +819,15 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();
+ arm_memblock_init(&meminfo, mdesc);
+
paging_init(mdesc);
request_standard_resources(&meminfo, mdesc);
#ifdef CONFIG_SMP
smp_init_cpus();
#endif
+ reserve_crashkernel();
cpu_init();
tcm_init();
@@ -729,6 +835,7 @@ void __init setup_arch(char **cmdline_p)
/*
* Set up various architecture-specific pointers
*/
+ arch_nr_irqs = mdesc->nr_irqs;
init_arch_irq = mdesc->init_irq;
system_timer = mdesc->timer;
init_machine = mdesc->init_machine;
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index b8c3d0f689d9..40dc74f2b27f 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -429,7 +429,11 @@ static void smp_timer_broadcast(const struct cpumask *mask)
{
send_ipi_message(mask, IPI_TIMER);
}
+#else
+#define smp_timer_broadcast NULL
+#endif
+#ifndef CONFIG_LOCAL_TIMERS
static void broadcast_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
@@ -444,7 +448,6 @@ static void local_timer_setup(struct clock_event_device *evt)
evt->rating = 400;
evt->mult = 1;
evt->set_mode = broadcast_timer_set_mode;
- evt->broadcast = smp_timer_broadcast;
clockevents_register_device(evt);
}
@@ -456,6 +459,7 @@ void __cpuinit percpu_timer_setup(void)
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
evt->cpumask = cpumask_of(cpu);
+ evt->broadcast = smp_timer_broadcast;
local_timer_setup(evt);
}
@@ -467,10 +471,13 @@ static DEFINE_SPINLOCK(stop_lock);
*/
static void ipi_cpu_stop(unsigned int cpu)
{
- spin_lock(&stop_lock);
- printk(KERN_CRIT "CPU%u: stopping\n", cpu);
- dump_stack();
- spin_unlock(&stop_lock);
+ if (system_state == SYSTEM_BOOTING ||
+ system_state == SYSTEM_RUNNING) {
+ spin_lock(&stop_lock);
+ printk(KERN_CRIT "CPU%u: stopping\n", cpu);
+ dump_stack();
+ spin_unlock(&stop_lock);
+ }
set_cpu_online(cpu, false);
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 7c5f0c024db7..35882fbf37f9 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -132,7 +132,8 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
twd_calibrate_rate();
clk->name = "local_timer";
- clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
+ clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_C3STOP;
clk->rating = 350;
clk->set_mode = twd_set_mode;
clk->set_next_event = twd_set_next_event;
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index c23501842b98..5b7c541a4c63 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -62,7 +62,7 @@ asmlinkage int sys_vfork(struct pt_regs *regs)
/* sys_execve() executes a new program.
* This is called indirectly via a small wrapper
*/
-asmlinkage int sys_execve(char __user *filenamei, char __user * __user *argv,
+asmlinkage int sys_execve(const char __user *filenamei, char __user * __user *argv,
char __user * __user *envp, struct pt_regs *regs)
{
int error;
@@ -84,7 +84,7 @@ int kernel_execve(const char *filename, char *const argv[], char *const envp[])
int ret;
memset(&regs, 0, sizeof(struct pt_regs));
- ret = do_execve((char *)filename, (char __user * __user *)argv,
+ ret = do_execve(filename, (char __user * __user *)argv,
(char __user * __user *)envp, &regs);
if (ret < 0)
goto out;
diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
index 33ff678e32f2..4ad8da15ef2b 100644
--- a/arch/arm/kernel/sys_oabi-compat.c
+++ b/arch/arm/kernel/sys_oabi-compat.c
@@ -141,7 +141,7 @@ static long cp_oldabi_stat64(struct kstat *stat,
return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}
-asmlinkage long sys_oabi_stat64(char __user * filename,
+asmlinkage long sys_oabi_stat64(const char __user * filename,
struct oldabi_stat64 __user * statbuf)
{
struct kstat stat;
@@ -151,7 +151,7 @@ asmlinkage long sys_oabi_stat64(char __user * filename,
return error;
}
-asmlinkage long sys_oabi_lstat64(char __user * filename,
+asmlinkage long sys_oabi_lstat64(const char __user * filename,
struct oldabi_stat64 __user * statbuf)
{
struct kstat stat;
@@ -172,7 +172,7 @@ asmlinkage long sys_oabi_fstat64(unsigned long fd,
}
asmlinkage long sys_oabi_fstatat64(int dfd,
- char __user *filename,
+ const char __user *filename,
struct oldabi_stat64 __user *statbuf,
int flag)
{
diff --git a/arch/arm/kernel/tcm.c b/arch/arm/kernel/tcm.c
index e50303868f1b..26685c2f7a49 100644
--- a/arch/arm/kernel/tcm.c
+++ b/arch/arm/kernel/tcm.c
@@ -13,38 +13,35 @@
#include <linux/ioport.h>
#include <linux/genalloc.h>
#include <linux/string.h> /* memcpy */
-#include <asm/page.h> /* PAGE_SHIFT */
#include <asm/cputype.h>
#include <asm/mach/map.h>
#include <mach/memory.h>
#include "tcm.h"
-/* Scream and warn about misuse */
-#if !defined(ITCM_OFFSET) || !defined(ITCM_END) || \
- !defined(DTCM_OFFSET) || !defined(DTCM_END)
-#error "TCM support selected but offsets not defined!"
-#endif
-
static struct gen_pool *tcm_pool;
/* TCM section definitions from the linker */
extern char __itcm_start, __sitcm_text, __eitcm_text;
extern char __dtcm_start, __sdtcm_data, __edtcm_data;
+/* These will be increased as we run */
+u32 dtcm_end = DTCM_OFFSET;
+u32 itcm_end = ITCM_OFFSET;
+
/*
* TCM memory resources
*/
static struct resource dtcm_res = {
.name = "DTCM RAM",
.start = DTCM_OFFSET,
- .end = DTCM_END,
+ .end = DTCM_OFFSET,
.flags = IORESOURCE_MEM
};
static struct resource itcm_res = {
.name = "ITCM RAM",
.start = ITCM_OFFSET,
- .end = ITCM_END,
+ .end = ITCM_OFFSET,
.flags = IORESOURCE_MEM
};
@@ -52,8 +49,8 @@ static struct map_desc dtcm_iomap[] __initdata = {
{
.virtual = DTCM_OFFSET,
.pfn = __phys_to_pfn(DTCM_OFFSET),
- .length = (DTCM_END - DTCM_OFFSET + 1),
- .type = MT_UNCACHED
+ .length = 0,
+ .type = MT_MEMORY_DTCM
}
};
@@ -61,8 +58,8 @@ static struct map_desc itcm_iomap[] __initdata = {
{
.virtual = ITCM_OFFSET,
.pfn = __phys_to_pfn(ITCM_OFFSET),
- .length = (ITCM_END - ITCM_OFFSET + 1),
- .type = MT_UNCACHED
+ .length = 0,
+ .type = MT_MEMORY_ITCM
}
};
@@ -93,14 +90,24 @@ void tcm_free(void *addr, size_t len)
}
EXPORT_SYMBOL(tcm_free);
-
-static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
+static int __init setup_tcm_bank(u8 type, u8 bank, u8 banks,
+ u32 *offset)
{
const int tcm_sizes[16] = { 0, -1, -1, 4, 8, 16, 32, 64, 128,
256, 512, 1024, -1, -1, -1, -1 };
u32 tcm_region;
int tcm_size;
+ /*
+ * If there are more than one TCM bank of this type,
+ * select the TCM bank to operate on in the TCM selection
+ * register.
+ */
+ if (banks > 1)
+ asm("mcr p15, 0, %0, c9, c2, 0"
+ : /* No output operands */
+ : "r" (bank));
+
/* Read the special TCM region register c9, 0 */
if (!type)
asm("mrc p15, 0, %0, c9, c1, 0"
@@ -111,26 +118,24 @@ static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
tcm_size = tcm_sizes[(tcm_region >> 2) & 0x0f];
if (tcm_size < 0) {
- pr_err("CPU: %sTCM of unknown size!\n",
- type ? "I" : "D");
+ pr_err("CPU: %sTCM%d of unknown size\n",
+ type ? "I" : "D", bank);
+ return -EINVAL;
+ } else if (tcm_size > 32) {
+ pr_err("CPU: %sTCM%d larger than 32k found\n",
+ type ? "I" : "D", bank);
+ return -EINVAL;
} else {
- pr_info("CPU: found %sTCM %dk @ %08x, %senabled\n",
+ pr_info("CPU: found %sTCM%d %dk @ %08x, %senabled\n",
type ? "I" : "D",
+ bank,
tcm_size,
(tcm_region & 0xfffff000U),
(tcm_region & 1) ? "" : "not ");
}
- if (tcm_size != expected_size) {
- pr_crit("CPU: %sTCM was detected %dk but expected %dk!\n",
- type ? "I" : "D",
- tcm_size,
- expected_size);
- /* Adjust to the expected size? what can we do... */
- }
-
/* Force move the TCM bank to where we want it, enable */
- tcm_region = offset | (tcm_region & 0x00000ffeU) | 1;
+ tcm_region = *offset | (tcm_region & 0x00000ffeU) | 1;
if (!type)
asm("mcr p15, 0, %0, c9, c1, 0"
@@ -141,10 +146,15 @@ static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
: /* No output operands */
: "r" (tcm_region));
- pr_debug("CPU: moved %sTCM %dk to %08x, enabled\n",
- type ? "I" : "D",
- tcm_size,
- (tcm_region & 0xfffff000U));
+ /* Increase offset */
+ *offset += (tcm_size << 10);
+
+ pr_info("CPU: moved %sTCM%d %dk to %08x, enabled\n",
+ type ? "I" : "D",
+ bank,
+ tcm_size,
+ (tcm_region & 0xfffff000U));
+ return 0;
}
/*
@@ -153,34 +163,52 @@ static void __init setup_tcm_bank(u8 type, u32 offset, u32 expected_size)
void __init tcm_init(void)
{
u32 tcm_status = read_cpuid_tcmstatus();
+ u8 dtcm_banks = (tcm_status >> 16) & 0x03;
+ u8 itcm_banks = (tcm_status & 0x03);
char *start;
char *end;
char *ram;
+ int ret;
+ int i;
/* Setup DTCM if present */
- if (tcm_status & (1 << 16)) {
- setup_tcm_bank(0, DTCM_OFFSET,
- (DTCM_END - DTCM_OFFSET + 1) >> 10);
+ if (dtcm_banks > 0) {
+ for (i = 0; i < dtcm_banks; i++) {
+ ret = setup_tcm_bank(0, i, dtcm_banks, &dtcm_end);
+ if (ret)
+ return;
+ }
+ dtcm_res.end = dtcm_end - 1;
request_resource(&iomem_resource, &dtcm_res);
+ dtcm_iomap[0].length = dtcm_end - DTCM_OFFSET;
iotable_init(dtcm_iomap, 1);
/* Copy data from RAM to DTCM */
start = &__sdtcm_data;
end = &__edtcm_data;
ram = &__dtcm_start;
+ /* This means you compiled more code than fits into DTCM */
+ BUG_ON((end - start) > (dtcm_end - DTCM_OFFSET));
memcpy(start, ram, (end-start));
pr_debug("CPU DTCM: copied data from %p - %p\n", start, end);
}
/* Setup ITCM if present */
- if (tcm_status & 1) {
- setup_tcm_bank(1, ITCM_OFFSET,
- (ITCM_END - ITCM_OFFSET + 1) >> 10);
+ if (itcm_banks > 0) {
+ for (i = 0; i < itcm_banks; i++) {
+ ret = setup_tcm_bank(1, i, itcm_banks, &itcm_end);
+ if (ret)
+ return;
+ }
+ itcm_res.end = itcm_end - 1;
request_resource(&iomem_resource, &itcm_res);
+ itcm_iomap[0].length = itcm_end - ITCM_OFFSET;
iotable_init(itcm_iomap, 1);
/* Copy code from RAM to ITCM */
start = &__sitcm_text;
end = &__eitcm_text;
ram = &__itcm_start;
+ /* This means you compiled more code than fits into ITCM */
+ BUG_ON((end - start) > (itcm_end - ITCM_OFFSET));
memcpy(start, ram, (end-start));
pr_debug("CPU ITCM: copied code from %p - %p\n", start, end);
}
@@ -208,10 +236,10 @@ static int __init setup_tcm_pool(void)
pr_debug("Setting up TCM memory pool\n");
/* Add the rest of DTCM to the TCM pool */
- if (tcm_status & (1 << 16)) {
- if (dtcm_pool_start < DTCM_END) {
+ if (tcm_status & (0x03 << 16)) {
+ if (dtcm_pool_start < dtcm_end) {
ret = gen_pool_add(tcm_pool, dtcm_pool_start,
- DTCM_END - dtcm_pool_start + 1, -1);
+ dtcm_end - dtcm_pool_start, -1);
if (ret) {
pr_err("CPU DTCM: could not add DTCM " \
"remainder to pool!\n");
@@ -219,16 +247,16 @@ static int __init setup_tcm_pool(void)
}
pr_debug("CPU DTCM: Added %08x bytes @ %08x to " \
"the TCM memory pool\n",
- DTCM_END - dtcm_pool_start + 1,
+ dtcm_end - dtcm_pool_start,
dtcm_pool_start);
}
}
/* Add the rest of ITCM to the TCM pool */
- if (tcm_status & 1) {
- if (itcm_pool_start < ITCM_END) {
+ if (tcm_status & 0x03) {
+ if (itcm_pool_start < itcm_end) {
ret = gen_pool_add(tcm_pool, itcm_pool_start,
- ITCM_END - itcm_pool_start + 1, -1);
+ itcm_end - itcm_pool_start, -1);
if (ret) {
pr_err("CPU ITCM: could not add ITCM " \
"remainder to pool!\n");
@@ -236,7 +264,7 @@ static int __init setup_tcm_pool(void)
}
pr_debug("CPU ITCM: Added %08x bytes @ %08x to " \
"the TCM memory pool\n",
- ITCM_END - itcm_pool_start + 1,
+ itcm_end - itcm_pool_start,
itcm_pool_start);
}
}
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 1621e5327b2a..cda78d59aa31 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -30,6 +30,7 @@
#include <asm/unistd.h>
#include <asm/traps.h>
#include <asm/unwind.h>
+#include <asm/tls.h>
#include "ptrace.h"
#include "signal.h"
@@ -518,17 +519,20 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
case NR(set_tls):
thread->tp_value = regs->ARM_r0;
-#if defined(CONFIG_HAS_TLS_REG)
- asm ("mcr p15, 0, %0, c13, c0, 3" : : "r" (regs->ARM_r0) );
-#elif !defined(CONFIG_TLS_REG_EMUL)
- /*
- * User space must never try to access this directly.
- * Expect your app to break eventually if you do so.
- * The user helper at 0xffff0fe0 must be used instead.
- * (see entry-armv.S for details)
- */
- *((unsigned int *)0xffff0ff0) = regs->ARM_r0;
-#endif
+ if (tls_emu)
+ return 0;
+ if (has_tls_reg) {
+ asm ("mcr p15, 0, %0, c13, c0, 3"
+ : : "r" (regs->ARM_r0));
+ } else {
+ /*
+ * User space must never try to access this directly.
+ * Expect your app to break eventually if you do so.
+ * The user helper at 0xffff0fe0 must be used instead.
+ * (see entry-armv.S for details)
+ */
+ *((unsigned int *)0xffff0ff0) = regs->ARM_r0;
+ }
return 0;
#ifdef CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG
@@ -743,6 +747,16 @@ void __init trap_init(void)
return;
}
+static void __init kuser_get_tls_init(unsigned long vectors)
+{
+ /*
+ * vectors + 0xfe0 = __kuser_get_tls
+ * vectors + 0xfe8 = hardware TLS instruction at 0xffff0fe8
+ */
+ if (tls_emu || has_tls_reg)
+ memcpy((void *)vectors + 0xfe0, (void *)vectors + 0xfe8, 4);
+}
+
void __init early_trap_init(void)
{
unsigned long vectors = CONFIG_VECTORS_BASE;
@@ -761,6 +775,11 @@ void __init early_trap_init(void)
memcpy((void *)vectors + 0x1000 - kuser_sz, __kuser_helper_start, kuser_sz);
/*
+ * Do processor specific fixups for the kuser helpers
+ */
+ kuser_get_tls_init(vectors);
+
+ /*
* Copy signal return handlers into the vector page, and
* set sigreturn to be a pointer to these.
*/
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 15:46:42 +0100