korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-26 05:34:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h

Browse Source 
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
This commit is contained in:
Christophe Leroy 2019-12-21 08:32:23 +00:00 committed by Michael Ellerman
parent 39bccfd164
commit 1f1c4d0122
3 changed files with 9 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/kernel/head_32.S
View File

@ -272,9 +272,7 @@ __secondary_hold_acknowledge:
*/
. = 0x200
DO_KVM 0x200
mtspr SPRN_SPRG_SCRATCH0,r10
mtspr SPRN_SPRG_SCRATCH1,r11
mfcr r10
EXCEPTION_PROLOG_0
#ifdef CONFIG_PPC_CHRP
mfspr r11, SPRN_SPRG_THREAD
lwz r11, RTAS_SP(r11)

9
arch/powerpc/kernel/head_32.h
View File

@ -10,13 +10,16 @@
* We assume sprg3 has the physical address of the current
* task's thread_struct.
*/
.macro EXCEPTION_PROLOG
EXCEPTION_PROLOG_0
EXCEPTION_PROLOG_1
EXCEPTION_PROLOG_2
.endm
.macro EXCEPTION_PROLOG_0
mtspr SPRN_SPRG_SCRATCH0,r10
mtspr SPRN_SPRG_SCRATCH1,r11
mfcr r10
EXCEPTION_PROLOG_1
EXCEPTION_PROLOG_2
.endm
.macro EXCEPTION_PROLOG_1

9
arch/powerpc/kernel/head_8xx.S
View File

@ -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