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ArmPkg/ArmLib: don't invalidate entire I-cache on range operation

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Instead of cleaning the data cache to the PoU by virtual address and
subsequently invalidating the entire I-cache, invalidate only the
range that we just cleaned. This way, we don't invalidate other
cachelines unnecessarily.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
2016-05-11 10:38:47 +02:00
parent 14b2ebc30c
commit cf580da1bc
5 changed files with 43 additions and 11 deletions
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5
ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.S
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@@ -18,6 +18,7 @@
GCC_ASM_EXPORT (ArmInvalidateInstructionCache)
GCC_ASM_EXPORT (ArmInvalidateDataCacheEntryByMVA)
GCC_ASM_EXPORT (ArmInvalidateInstructionCacheEntryToPoUByMVA)
GCC_ASM_EXPORT (ArmCleanDataCacheEntryByMVA)
GCC_ASM_EXPORT (ArmCleanDataCacheEntryToPoUByMVA)
GCC_ASM_EXPORT (ArmCleanInvalidateDataCacheEntryByMVA)
@@ -74,6 +75,10 @@ ASM_PFX(ArmCleanDataCacheEntryToPoUByMVA):
mcr p15, 0, r0, c7, c11, 1 @clean single data cache line to PoU
bx lr
ASM_PFX(ArmInvalidateInstructionCacheEntryToPoUByMVA):
mcr p15, 0, r0, c7, c5, 1 @Invalidate single instruction cache line to PoU
mcr p15, 0, r0, c7, c5, 7 @Invalidate branch predictor
bx lr
ASM_PFX(ArmCleanInvalidateDataCacheEntryByMVA):
mcr p15, 0, r0, c7, c14, 1 @clean and invalidate single data cache line

6
ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.asm
View File

@@ -34,6 +34,12 @@ CTRL_I_BIT EQU (1 << 12)
bx lr
RVCT_ASM_EXPORT ArmInvalidateInstructionCacheEntryToPoUByMVA
mcr p15, 0, r0, c7, c5, 1 ; invalidate single instruction cache line to PoU
mcr p15, 0, r0, c7, c5, 7 ; invalidate branch predictor
bx lr
RVCT_ASM_EXPORT ArmCleanDataCacheEntryToPoUByMVA
mcr p15, 0, r0, c7, c11, 1 ; clean single data cache line to PoU
bx lr