#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/delay.h>
+#include <asm/kdebug.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
#include <asm/ppcdebug.h>
#include <asm/rtas.h>
-
-#ifdef CONFIG_PPC_PSERIES
-/* This is true if we are using the firmware NMI handler (typically LPAR) */
-extern int fwnmi_active;
-#endif
+#include <asm/systemcfg.h>
+#include <asm/machdep.h>
#ifdef CONFIG_DEBUGGER
int (*__debugger)(struct pt_regs *regs);
EXPORT_SYMBOL(__debugger_fault_handler);
#endif
+struct notifier_block *ppc64_die_chain;
+static DEFINE_SPINLOCK(die_notifier_lock);
+
+int register_die_notifier(struct notifier_block *nb)
+{
+ int err = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&die_notifier_lock, flags);
+ err = notifier_chain_register(&ppc64_die_chain, nb);
+ spin_unlock_irqrestore(&die_notifier_lock, flags);
+ return err;
+}
+
/*
* Trap & Exception support
*/
-static spinlock_t die_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(die_lock);
int die(const char *str, struct pt_regs *regs, long err)
{
}
if (nl)
printk("\n");
+ print_modules();
show_regs(regs);
bust_spinlocks(0);
spin_unlock_irq(&die_lock);
if (panic_on_oops) {
printk(KERN_EMERG "Fatal exception: panic in 5 seconds\n");
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(5 * HZ);
+ ssleep(5);
panic("Fatal exception");
}
do_exit(SIGSEGV);
return 0;
}
-static void
-_exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
+void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
{
siginfo_t info;
force_sig_info(signr, &info, current);
}
-#ifdef CONFIG_PPC_PSERIES
-/* Get the error information for errors coming through the
- * FWNMI vectors. The pt_regs' r3 will be updated to reflect
- * the actual r3 if possible, and a ptr to the error log entry
- * will be returned if found.
- */
-static struct rtas_error_log *FWNMI_get_errinfo(struct pt_regs *regs)
+void system_reset_exception(struct pt_regs *regs)
{
- unsigned long errdata = regs->gpr[3];
- struct rtas_error_log *errhdr = NULL;
- unsigned long *savep;
-
- if ((errdata >= 0x7000 && errdata < 0x7fff0) ||
- (errdata >= rtas.base && errdata < rtas.base + rtas.size - 16)) {
- savep = __va(errdata);
- regs->gpr[3] = savep[0]; /* restore original r3 */
- errhdr = (struct rtas_error_log *)(savep + 1);
- } else {
- printk("FWNMI: corrupt r3\n");
- }
- return errhdr;
-}
-
-/* Call this when done with the data returned by FWNMI_get_errinfo.
- * It will release the saved data area for other CPUs in the
- * partition to receive FWNMI errors.
- */
-static void FWNMI_release_errinfo(void)
-{
- int ret = rtas_call(rtas_token("ibm,nmi-interlock"), 0, 1, NULL);
- if (ret != 0)
- printk("FWNMI: nmi-interlock failed: %d\n", ret);
-}
-#endif
-
-void
-SystemResetException(struct pt_regs *regs)
-{
-#ifdef CONFIG_PPC_PSERIES
- if (fwnmi_active) {
- struct rtas_error_log *errhdr = FWNMI_get_errinfo(regs);
- if (errhdr) {
- /* XXX Should look at FWNMI information */
- }
- FWNMI_release_errinfo();
- }
-#endif
+ /* See if any machine dependent calls */
+ if (ppc_md.system_reset_exception)
+ ppc_md.system_reset_exception(regs);
die("System Reset", regs, 0);
/* What should we do here? We could issue a shutdown or hard reset. */
}
-#ifdef CONFIG_PPC_PSERIES
-/*
- * See if we can recover from a machine check exception.
- * This is only called on power4 (or above) and only via
- * the Firmware Non-Maskable Interrupts (fwnmi) handler
- * which provides the error analysis for us.
- *
- * Return 1 if corrected (or delivered a signal).
- * Return 0 if there is nothing we can do.
- */
-static int recover_mce(struct pt_regs *regs, struct rtas_error_log err)
+void machine_check_exception(struct pt_regs *regs)
{
- if (err.disposition == RTAS_DISP_FULLY_RECOVERED) {
- /* Platform corrected itself */
- return 1;
- } else if ((regs->msr & MSR_RI) &&
- user_mode(regs) &&
- err.severity == RTAS_SEVERITY_ERROR_SYNC &&
- err.disposition == RTAS_DISP_NOT_RECOVERED &&
- err.target == RTAS_TARGET_MEMORY &&
- err.type == RTAS_TYPE_ECC_UNCORR &&
- !(current->pid == 0 || current->pid == 1)) {
- /* Kill off a user process with an ECC error */
- printk(KERN_ERR "MCE: uncorrectable ecc error for pid %d\n",
- current->pid);
- /* XXX something better for ECC error? */
- _exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
- return 1;
- }
- return 0;
-}
-#endif
+ int recover = 0;
-/*
- * Handle a machine check.
- *
- * Note that on Power 4 and beyond Firmware Non-Maskable Interrupts (fwnmi)
- * should be present. If so the handler which called us tells us if the
- * error was recovered (never true if RI=0).
- *
- * On hardware prior to Power 4 these exceptions were asynchronous which
- * means we can't tell exactly where it occurred and so we can't recover.
- */
-void
-MachineCheckException(struct pt_regs *regs)
-{
-#ifdef CONFIG_PPC_PSERIES
- struct rtas_error_log err, *errp;
-
- if (fwnmi_active) {
- errp = FWNMI_get_errinfo(regs);
- if (errp)
- err = *errp;
- FWNMI_release_errinfo(); /* frees errp */
- if (errp && recover_mce(regs, err))
- return;
- }
-#endif
+ /* See if any machine dependent calls */
+ if (ppc_md.machine_check_exception)
+ recover = ppc_md.machine_check_exception(regs);
+
+ if (recover)
+ return;
if (debugger_fault_handler(regs))
return;
panic("Unrecoverable Machine check");
}
-void
-UnknownException(struct pt_regs *regs)
+void unknown_exception(struct pt_regs *regs)
{
printk("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
regs->nip, regs->msr, regs->trap);
_exception(SIGTRAP, regs, 0, 0);
}
-void
-InstructionBreakpointException(struct pt_regs *regs)
+void instruction_breakpoint_exception(struct pt_regs *regs)
{
+ if (notify_die(DIE_IABR_MATCH, "iabr_match", regs, 5,
+ 5, SIGTRAP) == NOTIFY_STOP)
+ return;
if (debugger_iabr_match(regs))
return;
_exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip);
}
-void
-SingleStepException(struct pt_regs *regs)
+void single_step_exception(struct pt_regs *regs)
{
regs->msr &= ~MSR_SE; /* Turn off 'trace' bit */
+ if (notify_die(DIE_SSTEP, "single_step", regs, 5,
+ 5, SIGTRAP) == NOTIFY_STOP)
+ return;
if (debugger_sstep(regs))
return;
static inline void emulate_single_step(struct pt_regs *regs)
{
if (regs->msr & MSR_SE)
- SingleStepException(regs);
+ single_step_exception(regs);
}
static void parse_fpe(struct pt_regs *regs)
#define module_find_bug(x) NULL
#endif
-static struct bug_entry *find_bug(unsigned long bugaddr)
+struct bug_entry *find_bug(unsigned long bugaddr)
{
struct bug_entry *bug;
return module_find_bug(bugaddr);
}
-int
+static int
check_bug_trap(struct pt_regs *regs)
{
struct bug_entry *bug;
return 0;
}
-void
-ProgramCheckException(struct pt_regs *regs)
+void program_check_exception(struct pt_regs *regs)
{
+ if (debugger_fault_handler(regs))
+ return;
+
if (regs->msr & 0x100000) {
/* IEEE FP exception */
parse_fpe(regs);
} else if (regs->msr & 0x20000) {
/* trap exception */
+ if (notify_die(DIE_BPT, "breakpoint", regs, 5,
+ 5, SIGTRAP) == NOTIFY_STOP)
+ return;
if (debugger_bpt(regs))
return;
}
}
-void KernelFPUnavailableException(struct pt_regs *regs)
+void kernel_fp_unavailable_exception(struct pt_regs *regs)
{
printk(KERN_EMERG "Unrecoverable FP Unavailable Exception "
"%lx at %lx\n", regs->trap, regs->nip);
die("Unrecoverable FP Unavailable Exception", regs, SIGABRT);
}
-void AltivecUnavailableException(struct pt_regs *regs)
+void altivec_unavailable_exception(struct pt_regs *regs)
{
#ifndef CONFIG_ALTIVEC
if (user_mode(regs)) {
}
/* Ensure exceptions are disabled */
-#define MMCR0_PMXE (1UL << (31 - 5))
-#define MMCR0_PMAO (1UL << (31 - 24))
-
static void dummy_perf(struct pt_regs *regs)
{
unsigned int mmcr0 = mfspr(SPRN_MMCR0);
EXPORT_SYMBOL(perf_irq);
-void
-PerformanceMonitorException(struct pt_regs *regs)
+void performance_monitor_exception(struct pt_regs *regs)
{
perf_irq(regs);
}
-void
-AlignmentException(struct pt_regs *regs)
+void alignment_exception(struct pt_regs *regs)
{
int fixed;
}
#ifdef CONFIG_ALTIVEC
-void
-AltivecAssistException(struct pt_regs *regs)
+void altivec_assist_exception(struct pt_regs *regs)
{
int err;
siginfo_t info;
git://git.onelab.eu / linux-2.6.git / blobdiff