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Add vpush/vpop to the exception handler as we added CopyMem/SetMem that can use NEON registers to speed things up. This means we need to save state so we don't blow up a CopyMem. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11130 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish 2010-12-08 00:14:23 +00:00
parent 6638a865ed
commit fe295078f2
2 changed files with 9 additions and 0 deletions
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5
ArmPkg/Drivers/CpuDxe/ExceptionSupport.ARMv6.S
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@ -57,6 +57,7 @@ This is the stack constructed by the exception handler (low address to high addr
.globl ASM_PFX(CommonCExceptionHandler)
.text
.fpu neon @ makes vpush/vpop assemble
.align 3
@ -246,6 +247,8 @@ NoAdjustNeeded:
@ R0 is ExceptionType
mov R1,SP @ R1 is SystemContext
vpush {d0-d15} @ save vstm registers in case they are used in optimizations
/*
VOID
EFIAPI
@ -257,6 +260,8 @@ CommonCExceptionHandler (
*/
blx ASM_PFX(CommonCExceptionHandler) @ Call exception handler
vpop {d0-d15}
ldr R1, [SP, #0x4c] @ Restore EFI_SYSTEM_CONTEXT_ARM.IFSR
mcr p15, 0, R1, c5, c0, 1 @ Write IFSR

4
ArmPkg/Drivers/CpuDxe/ExceptionSupport.ARMv6.asm
View File

@ -243,6 +243,8 @@ NoAdjustNeeded
; R0 is ExceptionType
mov R1,SP ; R1 is SystemContext
vpush {d0-d15} ; save vstm registers in case they are used in optimizations
/*
VOID
EFIAPI
@ -253,6 +255,8 @@ CommonCExceptionHandler (
*/
blx CommonCExceptionHandler ; Call exception handler
vpop {d0-d15}
ldr R1, [SP, #0x4c] ; Restore EFI_SYSTEM_CONTEXT_ARM.IFSR
mcr p15, 0, R1, c5, c0, 1 ; Write IFSR