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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-12-21 08:32:23 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-01-26 22:15:08 +1100 |
| commit | 1f1c4d0122eebd204468684f21f0270ea8a4999d (patch) | |
| tree | 9360be5fb9a51f8e25f9dd61f28f68be82c29ddb /arch/powerpc/kernel/head_8xx.S | |
| parent | powerpc/32: replace MTMSRD() by mtmsr (diff) | |
| download | linux-dev-1f1c4d0122eebd204468684f21f0270ea8a4999d.tar.xz linux-dev-1f1c4d0122eebd204468684f21f0270ea8a4999d.zip | |
powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h
This patch creates a macro for the very first part of
exception prolog, this will help when implementing
CONFIG_VMAP_STACK
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2249fe62f481121a180e9655ad2b998093f318f3.1576916812.git.christophe.leroy@c-s.fr
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 19f583e18402..dac7c0a34eea 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -494,10 +494,7 @@ InstructionTLBError: */ . = 0x1400 DataTLBError: - mtspr SPRN_SPRG_SCRATCH0, r10 - mtspr SPRN_SPRG_SCRATCH1, r11 - mfcr r10 - + EXCEPTION_PROLOG_0 mfspr r11, SPRN_DAR cmpwi cr0, r11, RPN_PATTERN beq- FixupDAR /* must be a buggy dcbX, icbi insn. */ @@ -530,9 +527,7 @@ DARFixed:/* Return from dcbx instruction bug workaround */ */ . = 0x1c00 DataBreakpoint: - mtspr SPRN_SPRG_SCRATCH0, r10 - mtspr SPRN_SPRG_SCRATCH1, r11 - mfcr r10 + EXCEPTION_PROLOG_0 mfspr r11, SPRN_SRR0 cmplwi cr0, r11, (.Ldtlbie - PAGE_OFFSET)@l cmplwi cr7, r11, (.Litlbie - PAGE_OFFSET)@l |