#include <linux/config.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/prctl.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/backlight.h>
#endif
-extern int fix_alignment(struct pt_regs *);
-extern void bad_page_fault(struct pt_regs *, unsigned long, int sig);
-
#ifdef CONFIG_XMON
void (*debugger)(struct pt_regs *regs) = xmon;
int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt;
/* On 4xx, the reason for the machine check or program exception
is in the ESR. */
#define get_reason(regs) ((regs)->dsisr)
+#ifndef CONFIG_E500
+#define get_mc_reason(regs) ((regs)->dsisr)
+#else
+#define get_mc_reason(regs) (mfspr(SPRN_MCSR))
+#endif
#define REASON_FP 0
#define REASON_ILLEGAL ESR_PIL
#define REASON_PRIVILEGED ESR_PPR
/* On non-4xx, the reason for the machine check or program
exception is in the MSR. */
#define get_reason(regs) ((regs)->msr)
+#define get_mc_reason(regs) ((regs)->msr)
#define REASON_FP 0x100000
#define REASON_ILLEGAL 0x80000
#define REASON_PRIVILEGED 0x40000
void
MachineCheckException(struct pt_regs *regs)
{
- unsigned long reason = get_reason(regs);
+ unsigned long reason = get_mc_reason(regs);
if (user_mode(regs)) {
regs->msr |= MSR_RI;
if (check_io_access(regs))
return;
-#ifdef CONFIG_4xx
+#if defined(CONFIG_4xx) && !defined(CONFIG_440A)
if (reason & ESR_IMCP) {
printk("Instruction");
mtspr(SPRN_ESR, reason & ~ESR_IMCP);
} else
printk("Data");
printk(" machine check in kernel mode.\n");
-
-#else /* !CONFIG_4xx */
+#elif defined(CONFIG_440A)
+ printk("Machine check in kernel mode.\n");
+ if (reason & ESR_IMCP){
+ printk("Instruction Synchronous Machine Check exception\n");
+ mtspr(SPRN_ESR, reason & ~ESR_IMCP);
+ }
+ else {
+ u32 mcsr = mfspr(SPRN_MCSR);
+ if (mcsr & MCSR_IB)
+ printk("Instruction Read PLB Error\n");
+ if (mcsr & MCSR_DRB)
+ printk("Data Read PLB Error\n");
+ if (mcsr & MCSR_DWB)
+ printk("Data Write PLB Error\n");
+ if (mcsr & MCSR_TLBP)
+ printk("TLB Parity Error\n");
+ if (mcsr & MCSR_ICP){
+ flush_instruction_cache();
+ printk("I-Cache Parity Error\n");
+ }
+ if (mcsr & MCSR_DCSP)
+ printk("D-Cache Search Parity Error\n");
+ if (mcsr & MCSR_DCFP)
+ printk("D-Cache Flush Parity Error\n");
+ if (mcsr & MCSR_IMPE)
+ printk("Machine Check exception is imprecise\n");
+
+ /* Clear MCSR */
+ mtspr(SPRN_MCSR, mcsr);
+ }
+#elif defined (CONFIG_E500)
+ 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_ICPERR)
+ printk("Instruction Cache Parity Error\n");
+ if (reason & MCSR_DCP_PERR)
+ printk("Data Cache Push Parity Error\n");
+ if (reason & MCSR_DCPERR)
+ printk("Data Cache Parity Error\n");
+ if (reason & MCSR_GL_CI)
+ printk("Guarded Load or Cache-Inhibited stwcx.\n");
+ if (reason & MCSR_BUS_IAERR)
+ printk("Bus - Instruction Address Error\n");
+ if (reason & MCSR_BUS_RAERR)
+ printk("Bus - Read Address Error\n");
+ if (reason & MCSR_BUS_WAERR)
+ printk("Bus - Write Address Error\n");
+ if (reason & MCSR_BUS_IBERR)
+ printk("Bus - Instruction Data Error\n");
+ if (reason & MCSR_BUS_RBERR)
+ printk("Bus - Read Data Bus Error\n");
+ if (reason & MCSR_BUS_WBERR)
+ printk("Bus - Read Data Bus Error\n");
+ if (reason & MCSR_BUS_IPERR)
+ printk("Bus - Instruction Parity Error\n");
+ if (reason & MCSR_BUS_RPERR)
+ printk("Bus - Read Parity Error\n");
+#else /* !CONFIG_4xx && !CONFIG_E500 */
printk("Machine check in kernel mode.\n");
printk("Caused by (from SRR1=%lx): ", reason);
switch (reason & 0x601F0000) {
}
#endif /* CONFIG_INT_TAU */
+void AltivecUnavailException(struct pt_regs *regs)
+{
+ static int kernel_altivec_count;
+
+#ifndef CONFIG_ALTIVEC
+ if (user_mode(regs)) {
+ /* A user program has executed an altivec instruction,
+ but this kernel doesn't support altivec. */
+ _exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
+ return;
+ }
+#endif
+ /* The kernel has executed an altivec instruction without
+ first enabling altivec. Whinge but let it do it. */
+ if (++kernel_altivec_count < 10)
+ printk(KERN_ERR "AltiVec used in kernel (task=%p, pc=%x)\n",
+ current, regs->nip);
+ regs->msr |= MSR_VEC;
+}
+
#ifdef CONFIG_ALTIVEC
void
AltivecAssistException(struct pt_regs *regs)
{
+ int err;
+
preempt_disable();
if (regs->msr & MSR_VEC)
giveup_altivec(current);
preempt_enable();
- /* XXX quick hack for now: set the non-Java bit in the VSCR */
- current->thread.vscr.u[3] |= 0x10000;
+ err = emulate_altivec(regs);
+ if (err == 0) {
+ regs->nip += 4; /* skip emulated instruction */
+ emulate_single_step(regs);
+ return;
+ }
+
+ if (err == -EFAULT) {
+ /* got an error reading the instruction */
+ _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip);
+ } else {
+ /* didn't recognize the instruction */
+ /* XXX quick hack for now: set the non-Java bit in the VSCR */
+ printk(KERN_ERR "unrecognized altivec instruction "
+ "in %s at %lx\n", current->comm, regs->nip);
+ current->thread.vscr.u[3] |= 0x10000;
+ }
}
#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_FSL_BOOKE
+void CacheLockingException(struct pt_regs *regs, unsigned long address,
+ unsigned long error_code)
+{
+ /* We treat cache locking instructions from the user
+ * as priv ops, in the future we could try to do
+ * something smarter
+ */
+ if (error_code & (ESR_DLK|ESR_ILK))
+ _exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
+ return;
+}
+#endif /* CONFIG_FSL_BOOKE */
+
+#ifdef CONFIG_SPE
+void
+SPEFloatingPointException(struct pt_regs *regs)
+{
+ unsigned long spefscr;
+ int fpexc_mode;
+ int code = 0;
+
+ spefscr = current->thread.spefscr;
+ fpexc_mode = current->thread.fpexc_mode;
+
+ /* Hardware does not neccessarily set sticky
+ * underflow/overflow/invalid flags */
+ if ((spefscr & SPEFSCR_FOVF) && (fpexc_mode & PR_FP_EXC_OVF)) {
+ code = FPE_FLTOVF;
+ spefscr |= SPEFSCR_FOVFS;
+ }
+ else if ((spefscr & SPEFSCR_FUNF) && (fpexc_mode & PR_FP_EXC_UND)) {
+ code = FPE_FLTUND;
+ spefscr |= SPEFSCR_FUNFS;
+ }
+ else if ((spefscr & SPEFSCR_FDBZ) && (fpexc_mode & PR_FP_EXC_DIV))
+ code = FPE_FLTDIV;
+ else if ((spefscr & SPEFSCR_FINV) && (fpexc_mode & PR_FP_EXC_INV)) {
+ code = FPE_FLTINV;
+ spefscr |= SPEFSCR_FINVS;
+ }
+ else if ((spefscr & (SPEFSCR_FG | SPEFSCR_FX)) && (fpexc_mode & PR_FP_EXC_RES))
+ code = FPE_FLTRES;
+
+ current->thread.spefscr = spefscr;
+
+ _exception(SIGFPE, regs, code, regs->nip);
+ return;
+}
+#endif
void __init trap_init(void)
{
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