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-rw-r--r--arch/blackfin/kernel/traps.c86
1 files changed, 44 insertions, 42 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index bef025b0744..5b0667da8d0 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -32,6 +32,7 @@
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/fs.h>
+#include <linux/rbtree.h>
#include <asm/traps.h>
#include <asm/cacheflush.h>
#include <asm/cplb.h>
@@ -75,16 +76,6 @@ void __init trap_init(void)
CSYNC();
}
-/*
- * Used to save the RETX, SEQSTAT, I/D CPLB FAULT ADDR
- * values across the transition from exception to IRQ5.
- * We put these in L1, so they are going to be in a valid
- * location during exception context
- */
-__attribute__((l1_data))
-unsigned long saved_retx, saved_seqstat,
- saved_icplb_fault_addr, saved_dcplb_fault_addr;
-
static void decode_address(char *buf, unsigned long address)
{
#ifdef CONFIG_DEBUG_VERBOSE
@@ -93,6 +84,7 @@ static void decode_address(char *buf, unsigned long address)
struct mm_struct *mm;
unsigned long flags, offset;
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
+ struct rb_node *n;
#ifdef CONFIG_KALLSYMS
unsigned long symsize;
@@ -138,9 +130,10 @@ static void decode_address(char *buf, unsigned long address)
if (!mm)
continue;
- vml = mm->context.vmlist;
- while (vml) {
- struct vm_area_struct *vma = vml->vma;
+ for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
+ struct vm_area_struct *vma;
+
+ vma = rb_entry(n, struct vm_area_struct, vm_rb);
if (address >= vma->vm_start && address < vma->vm_end) {
char _tmpbuf[256];
@@ -186,8 +179,6 @@ static void decode_address(char *buf, unsigned long address)
goto done;
}
-
- vml = vml->next;
}
if (!in_atomic)
mmput(mm);
@@ -211,18 +202,18 @@ asmlinkage void double_fault_c(struct pt_regs *fp)
printk(KERN_EMERG "\n" KERN_EMERG "Double Fault\n");
#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) {
+ unsigned int cpu = smp_processor_id();
char buf[150];
- decode_address(buf, saved_retx);
+ decode_address(buf, cpu_pda[cpu].retx);
printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
- (int)saved_seqstat & SEQSTAT_EXCAUSE, buf);
- decode_address(buf, saved_dcplb_fault_addr);
+ (unsigned int)cpu_pda[cpu].seqstat & SEQSTAT_EXCAUSE, buf);
+ decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %s\n", buf);
- decode_address(buf, saved_icplb_fault_addr);
+ decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %s\n", buf);
decode_address(buf, fp->retx);
- printk(KERN_NOTICE "The instruction at %s caused a double exception\n",
- buf);
+ printk(KERN_NOTICE "The instruction at %s caused a double exception\n", buf);
} else
#endif
{
@@ -240,6 +231,9 @@ asmlinkage void trap_c(struct pt_regs *fp)
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
int j;
#endif
+#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
+ unsigned int cpu = smp_processor_id();
+#endif
int sig = 0;
siginfo_t info;
unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE;
@@ -417,7 +411,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
info.si_code = ILL_CPLB_MULHIT;
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
- if (saved_dcplb_fault_addr < FIXED_CODE_START)
+ if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START)
verbose_printk(KERN_NOTICE "NULL pointer access\n");
else
#endif
@@ -471,7 +465,7 @@ asmlinkage void trap_c(struct pt_regs *fp)
info.si_code = ILL_CPLB_MULHIT;
sig = SIGSEGV;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
- if (saved_icplb_fault_addr < FIXED_CODE_START)
+ if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START)
verbose_printk(KERN_NOTICE "Jump to NULL address\n");
else
#endif
@@ -584,10 +578,15 @@ asmlinkage void trap_c(struct pt_regs *fp)
}
}
- info.si_signo = sig;
- info.si_errno = 0;
- info.si_addr = (void __user *)fp->pc;
- force_sig_info(sig, &info, current);
+#ifdef CONFIG_IPIPE
+ if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp))
+#endif
+ {
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_addr = (void __user *)fp->pc;
+ force_sig_info(sig, &info, current);
+ }
trace_buffer_restore(j);
return;
@@ -656,13 +655,13 @@ static bool get_instruction(unsigned short *val, unsigned short *address)
return false;
}
-/*
+/*
* decode the instruction if we are printing out the trace, as it
* makes things easier to follow, without running it through objdump
* These are the normal instructions which cause change of flow, which
* would be at the source of the trace buffer
*/
-#ifdef CONFIG_DEBUG_VERBOSE
+#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_BFIN_HWTRACE_ON)
static void decode_instruction(unsigned short *address)
{
unsigned short opcode;
@@ -846,7 +845,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
}
if (fp) {
frame = fp;
- printk(" FP: (0x%p)\n", fp);
+ printk(KERN_NOTICE " FP: (0x%p)\n", fp);
} else
frame = 0;
@@ -960,6 +959,7 @@ void dump_bfin_process(struct pt_regs *fp)
else
verbose_printk(KERN_NOTICE "COMM= invalid\n");
+ printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu);
if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START)
verbose_printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n"
KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n"
@@ -1053,6 +1053,7 @@ void show_regs(struct pt_regs *fp)
struct irqaction *action;
unsigned int i;
unsigned long flags;
+ unsigned int cpu = smp_processor_id();
verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
@@ -1112,9 +1113,9 @@ unlock:
if (((long)fp->seqstat & SEQSTAT_EXCAUSE) &&
(((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) {
- decode_address(buf, saved_dcplb_fault_addr);
+ decode_address(buf, cpu_pda[cpu].dcplb_fault_addr);
verbose_printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf);
- decode_address(buf, saved_icplb_fault_addr);
+ decode_address(buf, cpu_pda[cpu].icplb_fault_addr);
verbose_printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf);
}
@@ -1153,20 +1154,21 @@ unlock:
asmlinkage int sys_bfin_spinlock(int *spinlock)__attribute__((l1_text));
#endif
-asmlinkage int sys_bfin_spinlock(int *spinlock)
+static DEFINE_SPINLOCK(bfin_spinlock_lock);
+
+asmlinkage int sys_bfin_spinlock(int *p)
{
- int ret = 0;
- int tmp = 0;
+ int ret, tmp = 0;
- local_irq_disable();
- ret = get_user(tmp, spinlock);
- if (ret == 0) {
- if (tmp)
+ spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
+ ret = get_user(tmp, p);
+ if (likely(ret == 0)) {
+ if (unlikely(tmp))
ret = 1;
- tmp = 1;
- put_user(tmp, spinlock);
+ else
+ put_user(1, p);
}
- local_irq_enable();
+ spin_unlock(&bfin_spinlock_lock);
return ret;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 04:35:52 +0000