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arch:xtensa:vectors:fix bugs in a0 save

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Use right EXCSAVE_X

Signed-off-by: zhuyanlin <zhuyanlin1@xiaomi.com>
This commit is contained in:
zhuyanlin
2022-01-11 15:17:25 +08:00
committed by Abdelatif Guettouche
parent a1a9ce3d1e
commit 793ec6c909
1 changed files with 6 additions and 2 deletions
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arch/xtensa/src/common/xtensa_vectors.S
+6 -2
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@@ -233,7 +233,7 @@ _xtensa_nmi_vector:
.align 4 .align 4
_debug_exception_vector: _debug_exception_vector:
wsr a0, EXCSAVE + XCHAL_DEBUGLEVEL /* Preserve a0 */
mov a0, sp /* sp == a1 */ mov a0, sp /* sp == a1 */
addi sp, sp, -(4 * XCPTCONTEXT_SIZE) /* Allocate interrupt stack frame */ addi sp, sp, -(4 * XCPTCONTEXT_SIZE) /* Allocate interrupt stack frame */
s32i a0, sp, (4 * REG_A1) /* Save pre-interrupt SP */ s32i a0, sp, (4 * REG_A1) /* Save pre-interrupt SP */
@@ -273,6 +273,8 @@ _double_exception_vector:
break 1, 4 /* Unhandled double exception */ break 1, 4 /* Unhandled double exception */
#endif #endif
wsr a0, EXCSAVE_1 /* Preserve a0 */
mov a0, sp /* sp == a1 */ mov a0, sp /* sp == a1 */
addi sp, sp, -(4 * XCPTCONTEXT_SIZE) /* Allocate interrupt stack frame */ addi sp, sp, -(4 * XCPTCONTEXT_SIZE) /* Allocate interrupt stack frame */
s32i a0, sp, (4 * REG_A1) /* Save pre-interrupt SP */ s32i a0, sp, (4 * REG_A1) /* Save pre-interrupt SP */
@@ -280,7 +282,7 @@ _double_exception_vector:
s32i a0, sp, (4 * REG_PS) s32i a0, sp, (4 * REG_PS)
rsr a0, DEPC /* Save interruptee's PC */ rsr a0, DEPC /* Save interruptee's PC */
s32i a0, sp, (4 * REG_PC) s32i a0, sp, (4 * REG_PC)
rsr a0, EXCSAVE /* Save interruptee's a0 -- REVISIT */ rsr a0, EXCSAVE_1 /* Save interruptee's a0 -- REVISIT */
s32i a0, sp, (4 * REG_A0) s32i a0, sp, (4 * REG_A0)
rsr a0, EXCCAUSE /* Save the EXCCAUSE register */ rsr a0, EXCCAUSE /* Save the EXCCAUSE register */
@@ -315,6 +317,8 @@ _kernel_exception_vector:
break 1, 0 /* Unhandled kernel exception */ break 1, 0 /* Unhandled kernel exception */
#endif #endif
wsr a0, EXCSAVE_1 /* Preserve a0 */
mov a0, sp /* sp == a1 */ mov a0, sp /* sp == a1 */
addi sp, sp, -(4 * XCPTCONTEXT_SIZE) /* Allocate interrupt stack frame */ addi sp, sp, -(4 * XCPTCONTEXT_SIZE) /* Allocate interrupt stack frame */
s32i a0, sp, (4 * REG_A1) /* Save pre-interrupt SP */ s32i a0, sp, (4 * REG_A1) /* Save pre-interrupt SP */