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// SPDX-License-Identifier: Apache-2.0
/*
* Deal with exceptions when in OPAL.
*
* Copyright 2013-2014 IBM Corp.
*/
#include <skiboot.h>
#include <stack.h>
#include <opal.h>
#include <processor.h>
#include <cpu.h>
#define REG "%016llx"
#define REG32 "%08x"
#define REGS_PER_LINE 4
static void dump_regs(struct stack_frame *stack)
{
unsigned int i;
prerror("CFAR : "REG" MSR : "REG"\n", stack->cfar, stack->msr);
prerror("SRR0 : "REG" SRR1 : "REG"\n", stack->srr0, stack->srr1);
prerror("HSRR0: "REG" HSRR1: "REG"\n", stack->hsrr0, stack->hsrr1);
prerror("DSISR: "REG32" DAR : "REG"\n", stack->dsisr, stack->dar);
prerror("LR : "REG" CTR : "REG"\n", stack->lr, stack->ctr);
prerror("CR : "REG32" XER : "REG32"\n", stack->cr, stack->xer);
for (i = 0; i < 16; i++)
prerror("GPR%02d: "REG" GPR%02d: "REG"\n",
i, stack->gpr[i], i + 16, stack->gpr[i + 16]);
}
#define EXCEPTION_MAX_STR 320
void exception_entry(struct stack_frame *stack)
{
bool fatal = false;
bool hv;
uint64_t nip;
uint64_t msr;
char buf[EXCEPTION_MAX_STR];
size_t l;
switch (stack->type) {
case 0x500:
case 0x980:
case 0xe00:
case 0xe20:
case 0xe40:
case 0xe60:
case 0xe80:
case 0xea0:
case 0xf80:
hv = true;
break;
default:
hv = false;
break;
}
if (hv) {
nip = stack->hsrr0;
msr = stack->hsrr1;
} else {
nip = stack->srr0;
msr = stack->srr1;
}
if (!(msr & MSR_RI))
fatal = true;
prerror("***********************************************\n");
l = 0;
if (stack->type == 0x100) {
if (fatal) {
l += snprintf(buf + l, EXCEPTION_MAX_STR - l,
"Fatal System Reset at "REG" ", nip);
} else {
l += snprintf(buf + l, EXCEPTION_MAX_STR - l,
"System Reset at "REG" ", nip);
}
} else if (stack->type == 0x200) {
fatal = true;
l += snprintf(buf + l, EXCEPTION_MAX_STR - l,
"Fatal MCE at "REG" ", nip);
} else {
fatal = true;
l += snprintf(buf + l, EXCEPTION_MAX_STR - l,
"Fatal Exception 0x%llx at "REG" ", stack->type, nip);
}
l += snprintf_symbol(buf + l, EXCEPTION_MAX_STR - l, nip);
l += snprintf(buf + l, EXCEPTION_MAX_STR - l, " MSR "REG, msr);
prerror("%s\n", buf);
dump_regs(stack);
if (fatal)
abort();
else
backtrace();
if (hv) {
/* Set up for SRR return */
stack->srr0 = nip;
stack->srr1 = msr;
}
}
void exception_entry_pm_sreset(void)
{
char buf[EXCEPTION_MAX_STR];
size_t l;
prerror("***********************************************\n");
l = 0;
l += snprintf(buf + l, EXCEPTION_MAX_STR - l,
"System Reset in sleep");
prerror("%s\n", buf);
backtrace();
}
void __noreturn exception_entry_pm_mce(void)
{
char buf[EXCEPTION_MAX_STR];
size_t l;
prerror("***********************************************\n");
l = 0;
l += snprintf(buf + l, EXCEPTION_MAX_STR - l,
"Fatal MCE in sleep");
prerror("%s\n", buf);
prerror("SRR0 : "REG" SRR1 : "REG"\n",
(uint64_t)mfspr(SPR_SRR0), (uint64_t)mfspr(SPR_SRR1));
prerror("DSISR: "REG32" DAR : "REG"\n",
(uint32_t)mfspr(SPR_DSISR), (uint64_t)mfspr(SPR_DAR));
abort();
}
static int64_t opal_register_exc_handler(uint64_t opal_exception __unused,
uint64_t handler_address __unused,
uint64_t glue_cache_line __unused)
{
/* This interface is deprecated */
return OPAL_UNSUPPORTED;
}
opal_call(OPAL_REGISTER_OPAL_EXCEPTION_HANDLER, opal_register_exc_handler, 3);
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