diff options
Diffstat (limited to 'arch/blackfin/kernel/traps.c')
| -rw-r--r-- | arch/blackfin/kernel/traps.c | 52 |
1 files changed, 49 insertions, 3 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index ffe7fb53eccb..aa76dfb0226e 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -68,6 +68,13 @@ ({ if (0) printk(fmt, ##arg); 0; }) #endif +#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) +u32 last_seqstat; +#ifdef CONFIG_DEBUG_MMRS_MODULE +EXPORT_SYMBOL(last_seqstat); +#endif +#endif + /* Initiate the event table handler */ void __init trap_init(void) { @@ -79,7 +86,6 @@ void __init trap_init(void) static void decode_address(char *buf, unsigned long address) { #ifdef CONFIG_DEBUG_VERBOSE - struct vm_list_struct *vml; struct task_struct *p; struct mm_struct *mm; unsigned long flags, offset; @@ -196,6 +202,11 @@ done: asmlinkage void double_fault_c(struct pt_regs *fp) { +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON + int j; + trace_buffer_save(j); +#endif + console_verbose(); oops_in_progress = 1; #ifdef CONFIG_DEBUG_VERBOSE @@ -220,9 +231,10 @@ asmlinkage void double_fault_c(struct pt_regs *fp) dump_bfin_process(fp); dump_bfin_mem(fp); show_regs(fp); + dump_bfin_trace_buffer(); } #endif - panic("Double Fault - unrecoverable event\n"); + panic("Double Fault - unrecoverable event"); } @@ -239,6 +251,9 @@ asmlinkage void trap_c(struct pt_regs *fp) unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; trace_buffer_save(j); +#if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) + last_seqstat = (u32)fp->seqstat; +#endif /* Important - be very careful dereferncing pointers - will lead to * double faults if the stack has become corrupt @@ -588,6 +603,9 @@ asmlinkage void trap_c(struct pt_regs *fp) force_sig_info(sig, &info, current); } + if (ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) + fp->pc = SAFE_USER_INSTRUCTION; + trace_buffer_restore(j); return; } @@ -832,6 +850,11 @@ void show_stack(struct task_struct *task, unsigned long *stack) decode_address(buf, (unsigned int)stack); printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf); + if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) { + printk(KERN_NOTICE "Invalid stack pointer\n"); + return; + } + /* First thing is to look for a frame pointer */ for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) { if (*addr & 0x1) @@ -1066,6 +1089,29 @@ void show_regs(struct pt_regs *fp) unsigned int cpu = smp_processor_id(); unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); + verbose_printk(KERN_NOTICE "\n"); + if (CPUID != bfin_cpuid()) + verbose_printk(KERN_NOTICE "Compiled for cpu family 0x%04x (Rev %d), " + "but running on:0x%04x (Rev %d)\n", + CPUID, bfin_compiled_revid(), bfin_cpuid(), bfin_revid()); + + verbose_printk(KERN_NOTICE "ADSP-%s-0.%d", + CPU, bfin_compiled_revid()); + + if (bfin_compiled_revid() != bfin_revid()) + verbose_printk("(Detected 0.%d)", bfin_revid()); + + verbose_printk(" %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n", + get_cclk()/1000000, get_sclk()/1000000, +#ifdef CONFIG_MPU + "mpu on" +#else + "mpu off" +#endif + ); + + verbose_printk(KERN_NOTICE "%s", linux_banner); + 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", (long)fp->seqstat, fp->ipend, fp->syscfg); @@ -1246,5 +1292,5 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp) dump_bfin_mem(fp); show_regs(fp); dump_stack(); - panic("Unrecoverable event\n"); + panic("Unrecoverable event"); } |