diff options
Diffstat (limited to 'arch/xtensa/kernel/vectors.S')
| -rw-r--r-- | arch/xtensa/kernel/vectors.S | 67 |
1 files changed, 43 insertions, 24 deletions
diff --git a/arch/xtensa/kernel/vectors.S b/arch/xtensa/kernel/vectors.S index 4462c1e595c..68df35f66ce 100644 --- a/arch/xtensa/kernel/vectors.S +++ b/arch/xtensa/kernel/vectors.S @@ -79,6 +79,8 @@ ENTRY(_UserExceptionVector) l32i a0, a0, EXC_TABLE_FAST_USER # load handler jx a0 +ENDPROC(_UserExceptionVector) + /* * Kernel exception vector. (Exceptions with PS.UM == 0, PS.EXCM == 0) * @@ -103,6 +105,7 @@ ENTRY(_KernelExceptionVector) l32i a0, a0, EXC_TABLE_FAST_KERNEL # load handler address jx a0 +ENDPROC(_KernelExceptionVector) /* * Double exception vector (Exceptions with PS.EXCM == 1) @@ -225,7 +228,13 @@ ENTRY(_DoubleExceptionVector) /* Window overflow/underflow exception. Get stack pointer. */ mov a3, a2 - movi a2, exc_table + /* This explicit literal and the following references to it are made + * in order to fit DoubleExceptionVector.literals into the available + * 16-byte gap before DoubleExceptionVector.text in the absence of + * link time relaxation. See kernel/vmlinux.lds.S + */ + .literal .Lexc_table, exc_table + l32r a2, .Lexc_table l32i a2, a2, EXC_TABLE_KSTK /* Check for overflow/underflow exception, jump if overflow. */ @@ -255,7 +264,7 @@ ENTRY(_DoubleExceptionVector) s32i a0, a2, PT_AREG0 wsr a3, excsave1 # save a3 - movi a3, exc_table + l32r a3, .Lexc_table rsr a0, exccause s32i a0, a2, PT_DEPC # mark it as a regular exception @@ -267,7 +276,7 @@ ENTRY(_DoubleExceptionVector) /* a0: depc, a1: a1, a2: a2, a3: trashed, depc: a0, excsave1: a3 */ - movi a3, exc_table + l32r a3, .Lexc_table s32i a2, a3, EXC_TABLE_DOUBLE_SAVE # temporary variable /* Enter critical section. */ @@ -296,7 +305,7 @@ ENTRY(_DoubleExceptionVector) /* a0: avail, a1: a1, a2: kstk, a3: avail, depc: a2, excsave: a3 */ - movi a3, exc_table + l32r a3, .Lexc_table rsr a0, exccause addx4 a0, a0, a3 l32i a0, a0, EXC_TABLE_FAST_USER @@ -338,6 +347,7 @@ ENTRY(_DoubleExceptionVector) .end literal_prefix +ENDPROC(_DoubleExceptionVector) /* * Debug interrupt vector @@ -349,9 +359,11 @@ ENTRY(_DoubleExceptionVector) .section .DebugInterruptVector.text, "ax" ENTRY(_DebugInterruptVector) + xsr a0, SREG_EXCSAVE + XCHAL_DEBUGLEVEL jx a0 +ENDPROC(_DebugInterruptVector) /* Window overflow and underflow handlers. @@ -363,38 +375,43 @@ ENTRY(_DebugInterruptVector) * we try to access any page that would cause a page fault early. */ +#define ENTRY_ALIGN64(name) \ + .globl name; \ + .align 64; \ + name: + .section .WindowVectors.text, "ax" /* 4-Register Window Overflow Vector (Handler) */ - .align 64 -.global _WindowOverflow4 -_WindowOverflow4: +ENTRY_ALIGN64(_WindowOverflow4) + s32e a0, a5, -16 s32e a1, a5, -12 s32e a2, a5, -8 s32e a3, a5, -4 rfwo +ENDPROC(_WindowOverflow4) + /* 4-Register Window Underflow Vector (Handler) */ - .align 64 -.global _WindowUnderflow4 -_WindowUnderflow4: +ENTRY_ALIGN64(_WindowUnderflow4) + l32e a0, a5, -16 l32e a1, a5, -12 l32e a2, a5, -8 l32e a3, a5, -4 rfwu +ENDPROC(_WindowUnderflow4) /* 8-Register Window Overflow Vector (Handler) */ - .align 64 -.global _WindowOverflow8 -_WindowOverflow8: +ENTRY_ALIGN64(_WindowOverflow8) + s32e a0, a9, -16 l32e a0, a1, -12 s32e a2, a9, -8 @@ -406,11 +423,12 @@ _WindowOverflow8: s32e a7, a0, -20 rfwo +ENDPROC(_WindowOverflow8) + /* 8-Register Window Underflow Vector (Handler) */ - .align 64 -.global _WindowUnderflow8 -_WindowUnderflow8: +ENTRY_ALIGN64(_WindowUnderflow8) + l32e a1, a9, -12 l32e a0, a9, -16 l32e a7, a1, -12 @@ -422,12 +440,12 @@ _WindowUnderflow8: l32e a7, a7, -20 rfwu +ENDPROC(_WindowUnderflow8) /* 12-Register Window Overflow Vector (Handler) */ - .align 64 -.global _WindowOverflow12 -_WindowOverflow12: +ENTRY_ALIGN64(_WindowOverflow12) + s32e a0, a13, -16 l32e a0, a1, -12 s32e a1, a13, -12 @@ -443,11 +461,12 @@ _WindowOverflow12: s32e a11, a0, -20 rfwo +ENDPROC(_WindowOverflow12) + /* 12-Register Window Underflow Vector (Handler) */ - .align 64 -.global _WindowUnderflow12 -_WindowUnderflow12: +ENTRY_ALIGN64(_WindowUnderflow12) + l32e a1, a13, -12 l32e a0, a13, -16 l32e a11, a1, -12 @@ -463,6 +482,6 @@ _WindowUnderflow12: l32e a11, a11, -20 rfwu - .text - +ENDPROC(_WindowUnderflow12) + .text |