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lib: Print mtval in sbi_trap_error()

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The mtval CSR is very useful information when debugging hence
print it upon trap error in sbi_trap_error().

Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel 2018-12-27 10:06:38 +05:30 • committed by Anup Patel
parent 45f874da6c
commit f2d4c5f291
1 changed files with 11 additions and 11 deletions

22
lib/sbi_trap.c
View file

@ -21,13 +21,15 @@
static void __attribute__((noreturn)) sbi_trap_error(const char *msg,
int rc, u32 hartid,
ulong mcause,
ulong mcause, ulong mtval,
struct sbi_trap_regs *regs)
{
sbi_printf("%s: hart%d: %s (error %d)\n",
__func__, hartid, msg, rc);
sbi_printf("%s: hart%d: mcause=0x%lx mepc=0x%lx mstatus=0x%lx\n",
__func__, hartid, mcause, regs->mepc, regs->mstatus);
sbi_printf("%s: hart%d: mcause=0x%lx mtval=0x%lx\n",
__func__, hartid, mcause, mtval);
sbi_printf("%s: hart%d: mepc=0x%lx mstatus=0x%lx\n",
__func__, hartid, regs->mepc, regs->mstatus);
sbi_printf("%s: hart%d: %s=0x%lx %s=0x%lx\n",
__func__, hartid, "ra", regs->ra, "sp", regs->sp);
sbi_printf("%s: hart%d: %s=0x%lx %s=0x%lx\n",
@ -67,8 +69,8 @@ static void __attribute__((noreturn)) sbi_trap_error(const char *msg,
void sbi_trap_handler(struct sbi_trap_regs *regs,
struct sbi_scratch *scratch)
{
int rc;
const char *msg;
int rc = SBI_ENOTSUPP;
const char *msg = "trap handler failed";
u32 hartid = sbi_current_hartid();
ulong mcause = csr_read(mcause);
@ -82,15 +84,12 @@ void sbi_trap_handler(struct sbi_trap_regs *regs,
sbi_ipi_process(scratch, hartid);
break;
default:
sbi_trap_error("unhandled external interrupt",
SBI_ENOTSUPP, hartid, mcause, regs);
break;
msg = "unhandled external interrupt";
goto trap_error;
};
return;
}
rc = SBI_ENOTSUPP;
msg = "trap handler failed";
switch (mcause) {
case CAUSE_ILLEGAL_INSTRUCTION:
rc = sbi_illegal_insn_handler(hartid, mcause, regs, scratch);
@ -113,7 +112,8 @@ void sbi_trap_handler(struct sbi_trap_regs *regs,
break;
};
trap_error:
if (rc) {
sbi_trap_error(msg, rc, hartid, mcause, regs);
sbi_trap_error(msg, rc, hartid, mcause, csr_read(mtval), regs);
}
}