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firware: optimize the exception exit code

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There are two copies of the same abnormal exit code, this patch deletes one

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Xiang W
2021-03-30 20:07:35 +08:00
committed by Anup Patel
parent 4edc822407
commit 4ef2f5d3e6
3 changed files with 6 additions and 25 deletions
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24
firmware/fw_base.S
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@@ -711,6 +711,7 @@ fw_platform_init:
.section .entry, "ax", %progbits
.align 3
.globl _trap_handler
.globl _trap_exit
_trap_handler:
TRAP_SAVE_AND_SETUP_SP_T0
@@ -720,17 +721,6 @@ _trap_handler:
TRAP_CALL_C_ROUTINE
TRAP_RESTORE_GENERAL_REGS_EXCEPT_SP_T0
TRAP_RESTORE_MEPC_MSTATUS 0
TRAP_RESTORE_SP_T0
mret
.section .entry, "ax", %progbits
.align 3
.globl _trap_exit
_trap_exit:
add sp, a0, zero
@@ -746,6 +736,7 @@ _trap_exit:
.section .entry, "ax", %progbits
.align 3
.globl _trap_handler_rv32_hyp
.globl _trap_exit_rv32_hyp
_trap_handler_rv32_hyp:
TRAP_SAVE_AND_SETUP_SP_T0
@@ -755,17 +746,6 @@ _trap_handler_rv32_hyp:
TRAP_CALL_C_ROUTINE
TRAP_RESTORE_GENERAL_REGS_EXCEPT_SP_T0
TRAP_RESTORE_MEPC_MSTATUS 1
TRAP_RESTORE_SP_T0
mret
.section .entry, "ax", %progbits
.align 3
.globl _trap_exit_rv32_hyp
_trap_exit_rv32_hyp:
add sp, a0, zero

2
include/sbi/sbi_trap.h
View File

@@ -205,7 +205,7 @@ struct sbi_trap_info {
int sbi_trap_redirect(struct sbi_trap_regs *regs,
struct sbi_trap_info *trap);
void sbi_trap_handler(struct sbi_trap_regs *regs);
struct sbi_trap_regs *sbi_trap_handler(struct sbi_trap_regs *regs);
void __noreturn sbi_trap_exit(const struct sbi_trap_regs *regs);

5
lib/sbi/sbi_trap.c
View File

@@ -210,7 +210,7 @@ int sbi_trap_redirect(struct sbi_trap_regs *regs,
*
* @param regs pointer to register state
*/
void sbi_trap_handler(struct sbi_trap_regs *regs)
struct sbi_trap_regs *sbi_trap_handler(struct sbi_trap_regs *regs)
{
int rc = SBI_ENOTSUPP;
const char *msg = "trap handler failed";
@@ -236,7 +236,7 @@ void sbi_trap_handler(struct sbi_trap_regs *regs)
msg = "unhandled external interrupt";
goto trap_error;
};
return;
return regs;
}
switch (mcause) {
@@ -271,6 +271,7 @@ void sbi_trap_handler(struct sbi_trap_regs *regs)
trap_error:
if (rc)
sbi_trap_error(msg, rc, mcause, mtval, mtval2, mtinst, regs);
return regs;
}
typedef void (*trap_exit_t)(const struct sbi_trap_regs *regs);