int pSeries_system_reset_exception(struct pt_regs *regs)
{
#ifdef __LITTLE_ENDIAN__
/*
* Some firmware byteswaps SRR registers and gives incorrect SRR1. Try
* to detect the bad SRR1 pattern here. Flip the NIP back to correct
* endian for reporting purposes. Unfortunately the MSR can't be fixed,
* so clear it. It will be missing MSR_RI so we won't try to recover.
*/
if ((be64_to_cpu(regs->msr) &
(MSR_LE|MSR_RI|MSR_DR|MSR_IR|MSR_ME|MSR_PR|
MSR_ILE|MSR_HV|MSR_SF)) == (MSR_DR|MSR_SF)) {
regs->nip = be64_to_cpu((__be64)regs->nip);
regs->msr = 0;
}
#endif
if (fwnmi_active) {
struct rtas_error_log *errhdr = fwnmi_get_errinfo(regs);
if (errhdr) {
/* XXX Should look at FWNMI information */
}
fwnmi_release_errinfo();
}
if (smp_handle_nmi_ipi(regs))
return 1;
return 0; /* need to perform reset */
}
void pSeries_system_reset_exception(struct pt_regs *regs)
{
if (fwnmi_active) {
struct rtas_error_log *errhdr = fwnmi_get_errinfo(regs);
if (errhdr) {
/* XXX Should look at FWNMI information */
}
fwnmi_release_errinfo();
}
}
/*
* 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.
*/
int pSeries_machine_check_exception(struct pt_regs *regs)
{
struct rtas_error_log *errp;
if (fwnmi_active) {
errp = fwnmi_get_errinfo(regs);
fwnmi_release_errinfo();
if (errp && recover_mce(regs, errp))
return 1;
}
return 0;
}
