/*
- * arch/ppc/kernel/traps.c
- *
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* This program is free software; you can redistribute it and/or
#include <asm/io.h>
#include <asm/reg.h>
#include <asm/xmon.h>
-#ifdef CONFIG_PMAC_BACKLIGHT
-#include <asm/backlight.h>
-#endif
-#include <asm/perfmon.h>
+#include <asm/pmc.h>
#ifdef CONFIG_XMON
-void (*debugger)(struct pt_regs *regs) = xmon;
+extern int xmon_bpt(struct pt_regs *regs);
+extern int xmon_sstep(struct pt_regs *regs);
+extern int xmon_iabr_match(struct pt_regs *regs);
+extern int xmon_dabr_match(struct pt_regs *regs);
+
+int (*debugger)(struct pt_regs *regs) = xmon;
int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt;
int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep;
int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match;
void (*debugger_fault_handler)(struct pt_regs *regs);
#else
#ifdef CONFIG_KGDB
-void (*debugger)(struct pt_regs *regs);
+int (*debugger)(struct pt_regs *regs);
int (*debugger_bpt)(struct pt_regs *regs);
int (*debugger_sstep)(struct pt_regs *regs);
int (*debugger_iabr_match)(struct pt_regs *regs);
DEFINE_SPINLOCK(die_lock);
-void die(const char * str, struct pt_regs * fp, long err)
+int die(const char * str, struct pt_regs * fp, long err)
{
static int die_counter;
int nl = 0;
console_verbose();
spin_lock_irq(&die_lock);
-#ifdef CONFIG_PMAC_BACKLIGHT
- set_backlight_enable(1);
- set_backlight_level(BACKLIGHT_MAX);
-#endif
printk("Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter);
#ifdef CONFIG_PREEMPT
printk("PREEMPT ");
info.si_code = code;
info.si_addr = (void __user *) addr;
force_sig_info(signr, &info, current);
+
+ /*
+ * Init gets no signals that it doesn't have a handler for.
+ * That's all very well, but if it has caused a synchronous
+ * exception and we ignore the resulting signal, it will just
+ * generate the same exception over and over again and we get
+ * nowhere. Better to kill it and let the kernel panic.
+ */
+ if (current->pid == 1) {
+ __sighandler_t handler;
+
+ spin_lock_irq(¤t->sighand->siglock);
+ handler = current->sighand->action[signr-1].sa.sa_handler;
+ spin_unlock_irq(¤t->sighand->siglock);
+ if (handler == SIG_DFL) {
+ /* init has generated a synchronous exception
+ and it doesn't have a handler for the signal */
+ printk(KERN_CRIT "init has generated signal %d "
+ "but has no handler for it\n", signr);
+ do_exit(signr);
+ }
+ }
}
/*
*/
static inline int check_io_access(struct pt_regs *regs)
{
-#ifdef CONFIG_PPC_PMAC
+#if defined CONFIG_8xx
unsigned long msr = regs->msr;
const struct exception_table_entry *entry;
unsigned int *nip = (unsigned int *)regs->nip;
nip -= 2;
else if (*nip == 0x4c00012c) /* isync */
--nip;
- if (*nip == 0x7c0004ac || (*nip >> 26) == 3) {
+ /* eieio from I/O string functions */
+ else if ((*nip) == 0x7c0006ac || *(nip+1) == 0x7c0006ac)
+ nip += 2;
+ if (*nip == 0x7c0004ac || (*nip >> 26) == 3 ||
+ (*(nip+1) >> 26) == 3) {
/* sync or twi */
unsigned int rb;
return 1;
}
}
-#endif /* CONFIG_PPC_PMAC */
+#endif /* CONFIG_8xx */
return 0;
}
/* On 4xx, the reason for the machine check or program exception
is in the ESR. */
#define get_reason(regs) ((regs)->dsisr)
-#ifndef CONFIG_E500
+#ifndef CONFIG_FSL_BOOKE
#define get_mc_reason(regs) ((regs)->dsisr)
#else
#define get_mc_reason(regs) (mfspr(SPRN_MCSR))
#endif
#define REASON_FP ESR_FP
-#define REASON_ILLEGAL ESR_PIL
+#define REASON_ILLEGAL (ESR_PIL | ESR_PUO)
#define REASON_PRIVILEGED ESR_PPR
#define REASON_TRAP ESR_PTR
{
}
-void MachineCheckException(struct pt_regs *regs)
+void machine_check_exception(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Bus - Instruction Parity Error\n");
if (reason & MCSR_BUS_RPERR)
printk("Bus - Read Parity Error\n");
-#else /* !CONFIG_4xx && !CONFIG_E500 */
+#elif defined (CONFIG_E200)
+ printk("Machine check in kernel mode.\n");
+ printk("Caused by (from MCSR=%lx): ", reason);
+
+ if (reason & MCSR_MCP)
+ printk("Machine Check Signal\n");
+ if (reason & MCSR_CP_PERR)
+ printk("Cache Push Parity Error\n");
+ if (reason & MCSR_CPERR)
+ printk("Cache Parity Error\n");
+ if (reason & MCSR_EXCP_ERR)
+ printk("ISI, ITLB, or Bus Error on first instruction fetch for an exception handler\n");
+ if (reason & MCSR_BUS_IRERR)
+ printk("Bus - Read Bus Error on instruction fetch\n");
+ if (reason & MCSR_BUS_DRERR)
+ printk("Bus - Read Bus Error on data load\n");
+ if (reason & MCSR_BUS_WRERR)
+ printk("Bus - Write Bus Error on buffered store or cache line push\n");
+#else /* !CONFIG_4xx && !CONFIG_E500 && !CONFIG_E200 */
printk("Machine check in kernel mode.\n");
printk("Caused by (from SRR1=%lx): ", reason);
switch (reason & 0x601F0000) {
#endif
}
-void UnknownException(struct pt_regs *regs)
+void unknown_exception(struct pt_regs *regs)
{
printk("Bad trap at PC: %lx, MSR: %lx, vector=%lx %s\n",
regs->nip, regs->msr, regs->trap, print_tainted());
_exception(SIGTRAP, regs, 0, 0);
}
-void InstructionBreakpoint(struct pt_regs *regs)
+void instruction_breakpoint_exception(struct pt_regs *regs)
{
if (debugger_iabr_match(regs))
return;
#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;
if (bug->line & BUG_WARNING_TRAP) {
/* this is a WARN_ON rather than BUG/BUG_ON */
#ifdef CONFIG_XMON
- xmon_printf(KERN_ERR "Badness in %s at %s:%d\n",
+ xmon_printf(KERN_ERR "Badness in %s at %s:%ld\n",
bug->function, bug->file,
bug->line & ~BUG_WARNING_TRAP);
#endif /* CONFIG_XMON */
- printk(KERN_ERR "Badness in %s at %s:%d\n",
+ printk(KERN_ERR "Badness in %s at %s:%ld\n",
bug->function, bug->file,
bug->line & ~BUG_WARNING_TRAP);
dump_stack();
return 1;
}
#ifdef CONFIG_XMON
- xmon_printf(KERN_CRIT "kernel BUG in %s at %s:%d!\n",
+ xmon_printf(KERN_CRIT "kernel BUG in %s at %s:%ld!\n",
bug->function, bug->file, bug->line);
xmon(regs);
#endif /* CONFIG_XMON */
- printk(KERN_CRIT "kernel BUG in %s at %s:%d!\n",
+ printk(KERN_CRIT "kernel BUG in %s at %s:%ld!\n",
bug->function, bug->file, bug->line);
return 0;
}
-void ProgramCheckException(struct pt_regs *regs)
+void program_check_exception(struct pt_regs *regs)
{
unsigned int reason = get_reason(regs);
extern int do_mathemu(struct pt_regs *regs);
giveup_fpu(current);
preempt_enable();
- fpscr = current->thread.fpscr;
+ fpscr = current->thread.fpscr.val;
fpscr &= fpscr << 22; /* mask summary bits with enables */
if (fpscr & FPSCR_VX)
code = FPE_FLTINV;
_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
}
-void SingleStepException(struct pt_regs *regs)
+void single_step_exception(struct pt_regs *regs)
{
regs->msr &= ~(MSR_SE | MSR_BE); /* Turn off 'trace' bits */
if (debugger_sstep(regs))
_exception(SIGTRAP, regs, TRAP_TRACE, 0);
}
-void AlignmentException(struct pt_regs *regs)
+void alignment_exception(struct pt_regs *regs)
{
int fixed;
}
#endif /* CONFIG_INT_TAU */
-void AltivecUnavailException(struct pt_regs *regs)
+/*
+ * FP unavailable trap from kernel - print a message, but let
+ * the task use FP in the kernel until it returns to user mode.
+ */
+void kernel_fp_unavailable_exception(struct pt_regs *regs)
+{
+ regs->msr |= MSR_FP;
+ printk(KERN_ERR "floating point used in kernel (task=%p, pc=%lx)\n",
+ current, regs->nip);
+}
+
+void altivec_unavailable_exception(struct pt_regs *regs)
{
static int kernel_altivec_count;
}
#ifdef CONFIG_ALTIVEC
-void AltivecAssistException(struct pt_regs *regs)
+void altivec_assist_exception(struct pt_regs *regs)
{
int err;
}
#endif /* CONFIG_ALTIVEC */
-void PerformanceMonitorException(struct pt_regs *regs)
+#ifdef CONFIG_E500
+void performance_monitor_exception(struct pt_regs *regs)
{
perf_irq(regs);
}
+#endif
#ifdef CONFIG_FSL_BOOKE
void CacheLockingException(struct pt_regs *regs, unsigned long address,
}
#endif
+#ifdef CONFIG_BOOKE_WDT
+/*
+ * Default handler for a Watchdog exception,
+ * spins until a reboot occurs
+ */
+void __attribute__ ((weak)) WatchdogHandler(struct pt_regs *regs)
+{
+ /* Generic WatchdogHandler, implement your own */
+ mtspr(SPRN_TCR, mfspr(SPRN_TCR)&(~TCR_WIE));
+ return;
+}
+
+void WatchdogException(struct pt_regs *regs)
+{
+ printk (KERN_EMERG "PowerPC Book-E Watchdog Exception\n");
+ WatchdogHandler(regs);
+}
+#endif
+
void __init trap_init(void)
{
}
git://git.onelab.eu / linux-2.6.git / blobdiff