diff options
Diffstat (limited to 'arch/xtensa/kernel/coprocessor.S')
| -rw-r--r-- | arch/xtensa/kernel/coprocessor.S | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S index 54c3be313bf..a482df5df2b 100644 --- a/arch/xtensa/kernel/coprocessor.S +++ b/arch/xtensa/kernel/coprocessor.S @@ -32,9 +32,9 @@ * a0: trashed, original value saved on stack (PT_AREG0) * a1: a1 * a2: new stack pointer, original in DEPC - * a3: dispatch table + * a3: a3 * depc: a2, original value saved on stack (PT_DEPC) - * excsave_1: a3 + * excsave_1: dispatch table * * PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC * < VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception @@ -43,10 +43,13 @@ /* IO protection is currently unsupported. */ ENTRY(fast_io_protect) + wsr a0, excsave1 movi a0, unrecoverable_exception callx0 a0 +ENDPROC(fast_io_protect) + #if XTENSA_HAVE_COPROCESSORS /* @@ -139,6 +142,7 @@ ENTRY(fast_io_protect) */ ENTRY(coprocessor_save) + entry a1, 32 s32i a0, a1, 0 movi a0, .Lsave_cp_regs_jump_table @@ -150,7 +154,10 @@ ENTRY(coprocessor_save) 1: l32i a0, a1, 0 retw +ENDPROC(coprocessor_save) + ENTRY(coprocessor_load) + entry a1, 32 s32i a0, a1, 0 movi a0, .Lload_cp_regs_jump_table @@ -162,8 +169,10 @@ ENTRY(coprocessor_load) 1: l32i a0, a1, 0 retw +ENDPROC(coprocessor_load) + /* - * coprocessor_flush(struct task_info*, index) + * coprocessor_flush(struct task_info*, index) * a2 a3 * coprocessor_restore(struct task_info*, index) * a2 a3 @@ -178,6 +187,7 @@ ENTRY(coprocessor_load) ENTRY(coprocessor_flush) + entry a1, 32 s32i a0, a1, 0 movi a0, .Lsave_cp_regs_jump_table @@ -191,6 +201,8 @@ ENTRY(coprocessor_flush) 1: l32i a0, a1, 0 retw +ENDPROC(coprocessor_flush) + ENTRY(coprocessor_restore) entry a1, 32 s32i a0, a1, 0 @@ -205,31 +217,34 @@ ENTRY(coprocessor_restore) 1: l32i a0, a1, 0 retw +ENDPROC(coprocessor_restore) + /* * Entry condition: * * a0: trashed, original value saved on stack (PT_AREG0) * a1: a1 * a2: new stack pointer, original in DEPC - * a3: dispatch table + * a3: a3 * depc: a2, original value saved on stack (PT_DEPC) - * excsave_1: a3 + * excsave_1: dispatch table * * PT_DEPC >= VALID_DOUBLE_EXCEPTION_ADDRESS: double exception, DEPC * < VALID_DOUBLE_EXCEPTION_ADDRESS: regular exception */ ENTRY(fast_coprocessor_double) + wsr a0, excsave1 movi a0, unrecoverable_exception callx0 a0 +ENDPROC(fast_coprocessor_double) ENTRY(fast_coprocessor) /* Save remaining registers a1-a3 and SAR */ - xsr a3, excsave1 s32i a3, a2, PT_AREG3 rsr a3, sar s32i a1, a2, PT_AREG1 @@ -327,9 +342,14 @@ ENTRY(fast_coprocessor) rfe +ENDPROC(fast_coprocessor) + .data + ENTRY(coprocessor_owner) + .fill XCHAL_CP_MAX, 4, 0 -#endif /* XTENSA_HAVE_COPROCESSORS */ +END(coprocessor_owner) +#endif /* XTENSA_HAVE_COPROCESSORS */ |