diff options
| -rw-r--r-- | arch/cris/arch-v32/kernel/traps.c | 192 |
1 files changed, 114 insertions, 78 deletions
diff --git a/arch/cris/arch-v32/kernel/traps.c b/arch/cris/arch-v32/kernel/traps.c index 17fd3dbd1c8..9003e382cad 100644 --- a/arch/cris/arch-v32/kernel/traps.c +++ b/arch/cris/arch-v32/kernel/traps.c @@ -1,50 +1,45 @@ /* - * Copyright (C) 2003, Axis Communications AB. + * Copyright (C) 2003-2006, Axis Communications AB. */ #include <linux/ptrace.h> +#include <linux/module.h> #include <asm/uaccess.h> - -#include <asm/arch/hwregs/supp_reg.h> - -extern void reset_watchdog(void); -extern void stop_watchdog(void); - -extern int raw_printk(const char *fmt, ...); +#include <hwregs/supp_reg.h> +#include <hwregs/intr_vect_defs.h> +#include <asm/irq.h> void show_registers(struct pt_regs *regs) { /* * It's possible to use either the USP register or current->thread.usp. - * USP might not correspond to the current proccess for all cases this + * USP might not correspond to the current process for all cases this * function is called, and current->thread.usp isn't up to date for the - * current proccess. Experience shows that using USP is the way to go. + * current process. Experience shows that using USP is the way to go. */ - unsigned long usp; + unsigned long usp = rdusp(); unsigned long d_mmu_cause; unsigned long i_mmu_cause; - usp = rdusp(); + printk("CPU: %d\n", smp_processor_id()); - raw_printk("CPU: %d\n", smp_processor_id()); + printk("ERP: %08lx SRP: %08lx CCS: %08lx USP: %08lx MOF: %08lx\n", + regs->erp, regs->srp, regs->ccs, usp, regs->mof); - raw_printk("ERP: %08lx SRP: %08lx CCS: %08lx USP: %08lx MOF: %08lx\n", - regs->erp, regs->srp, regs->ccs, usp, regs->mof); + printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n", + regs->r0, regs->r1, regs->r2, regs->r3); - raw_printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n", - regs->r0, regs->r1, regs->r2, regs->r3); + printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n", + regs->r4, regs->r5, regs->r6, regs->r7); - raw_printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n", - regs->r4, regs->r5, regs->r6, regs->r7); + printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n", + regs->r8, regs->r9, regs->r10, regs->r11); - raw_printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n", - regs->r8, regs->r9, regs->r10, regs->r11); + printk("r12: %08lx r13: %08lx oR10: %08lx acr: %08lx\n", + regs->r12, regs->r13, regs->orig_r10, regs->acr); - raw_printk("r12: %08lx r13: %08lx oR10: %08lx acr: %08lx\n", - regs->r12, regs->r13, regs->orig_r10, regs->acr); - - raw_printk("sp: %08lx\n", regs); + printk(" sp: %08lx\n", (unsigned long)regs); SUPP_BANK_SEL(BANK_IM); SUPP_REG_RD(RW_MM_CAUSE, i_mmu_cause); @@ -52,18 +47,20 @@ show_registers(struct pt_regs *regs) SUPP_BANK_SEL(BANK_DM); SUPP_REG_RD(RW_MM_CAUSE, d_mmu_cause); - raw_printk(" Data MMU Cause: %08lx\n", d_mmu_cause); - raw_printk("Instruction MMU Cause: %08lx\n", i_mmu_cause); + printk(" Data MMU Cause: %08lx\n", d_mmu_cause); + printk("Instruction MMU Cause: %08lx\n", i_mmu_cause); - raw_printk("Process %s (pid: %d, stackpage: %08lx)\n", - current->comm, current->pid, (unsigned long) current); + printk("Process %s (pid: %d, stackpage=%08lx)\n", + current->comm, current->pid, (unsigned long)current); - /* Show additional info if in kernel-mode. */ + /* + * When in-kernel, we also print out the stack and code at the + * time of the fault.. + */ if (!user_mode(regs)) { int i; - unsigned char c; - show_stack(NULL, (unsigned long *) usp); + show_stack(NULL, (unsigned long *)usp); /* * If the previous stack-dump wasn't a kernel one, dump the @@ -72,7 +69,7 @@ show_registers(struct pt_regs *regs) if (usp != 0) show_stack(NULL, NULL); - raw_printk("\nCode: "); + printk("\nCode: "); if (regs->erp < PAGE_OFFSET) goto bad_value; @@ -84,76 +81,115 @@ show_registers(struct pt_regs *regs) * instruction decoding should be in sync at the interesting * point, but small enough to fit on a row. The regs->erp * location is pointed out in a ksymoops-friendly way by - * wrapping the byte for that address in parenthesis. + * wrapping the byte for that address in parenthesises. */ for (i = -12; i < 12; i++) { - if (__get_user(c, &((unsigned char *) regs->erp)[i])) { + unsigned char c; + + if (__get_user(c, &((unsigned char *)regs->erp)[i])) { bad_value: - raw_printk(" Bad IP value."); + printk(" Bad IP value."); break; } if (i == 0) - raw_printk("(%02x) ", c); + printk("(%02x) ", c); else - raw_printk("%02x ", c); + printk("%02x ", c); } - - raw_printk("\n"); + printk("\n"); } } -/* - * This gets called from entry.S when the watchdog has bitten. Show something - * similar to an Oops dump, and if the kernel is configured to be a nice doggy; - * halt instead of reboot. - */ void -watchdog_bite_hook(struct pt_regs *regs) +arch_enable_nmi(void) { -#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY - local_irq_disable(); - stop_watchdog(); - show_registers(regs); + unsigned long flags; - while (1) - ; /* Do nothing. */ -#else - show_registers(regs); -#endif + local_save_flags(flags); + flags |= (1 << 30); /* NMI M flag is at bit 30 */ + local_irq_restore(flags); } -/* This is normally the Oops function. */ -void -die_if_kernel(const char *str, struct pt_regs *regs, long err) +extern void (*nmi_handler)(struct pt_regs *); +void handle_nmi(struct pt_regs *regs) { - if (user_mode(regs)) - return; +#ifdef CONFIG_ETRAXFS + reg_intr_vect_r_nmi r; +#endif -#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY - /* - * This printout might take too long and could trigger - * the watchdog normally. If NICE_DOGGY is set, simply - * stop the watchdog during the printout. - */ - stop_watchdog(); + if (nmi_handler) + nmi_handler(regs); + +#ifdef CONFIG_ETRAXFS + /* Wait until nmi is no longer active. */ + do { + r = REG_RD(intr_vect, regi_irq, r_nmi); + } while (r.ext == regk_intr_vect_on); #endif +} - raw_printk("%s: %04lx\n", str, err & 0xffff); - show_registers(regs); +#ifdef CONFIG_BUG +extern void die_if_kernel(const char *str, struct pt_regs *regs, long err); -#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY - reset_watchdog(); -#endif +/* Copy of the regs at BUG() time. */ +struct pt_regs BUG_regs; - do_exit(SIGSEGV); +void do_BUG(char *file, unsigned int line) +{ + printk("kernel BUG at %s:%d!\n", file, line); + die_if_kernel("Oops", &BUG_regs, 0); } +EXPORT_SYMBOL(do_BUG); -void arch_enable_nmi(void) +void fixup_BUG(struct pt_regs *regs) { - unsigned long flags; - local_save_flags(flags); - flags |= (1<<30); /* NMI M flag is at bit 30 */ - local_irq_restore(flags); + BUG_regs = *regs; + +#ifdef CONFIG_DEBUG_BUGVERBOSE + /* + * Fixup the BUG arguments through exception handlers. + */ + { + const struct exception_table_entry *fixup; + + /* + * ERP points at the "break 14" + 2, compensate for the 2 + * bytes. + */ + fixup = search_exception_tables(instruction_pointer(regs) - 2); + if (fixup) { + /* Adjust the instruction pointer in the stackframe. */ + instruction_pointer(regs) = fixup->fixup; + arch_fixup(regs); + } + } +#else + /* Dont try to lookup the filename + line, just dump regs. */ + do_BUG("unknown", 0); +#endif } + +/* + * Break 14 handler. Save regs and jump into the fixup_BUG. + */ +__asm__ ( ".text\n\t" + ".global breakh_BUG\n\t" + "breakh_BUG:\n\t" + SAVE_ALL + KGDB_FIXUP + "move.d $sp, $r10\n\t" + "jsr fixup_BUG\n\t" + "nop\n\t" + "jump ret_from_intr\n\t" + "nop\n\t"); + + +#ifdef CONFIG_DEBUG_BUGVERBOSE +void +handle_BUG(struct pt_regs *regs) +{ +} +#endif +#endif |