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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ArmPkg/Include/Library/ArmLib.h
View File

@ -187,6 +187,12 @@ ArmCleanDataCacheEntryToPoUByMVA(
IN UINTN Address
);
VOID
EFIAPI
ArmInvalidateInstructionCacheEntryToPoUByMVA (
IN UINTN Address
);
VOID
EFIAPI
ArmCleanDataCacheEntryByMVA (

28
ArmPkg/Library/ArmCacheMaintenanceLib/ArmCacheMaintenanceLib.c
View File

@ -17,15 +17,16 @@
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
STATIC
VOID
CacheRangeOperation (
IN VOID *Start,
IN UINTN Length,
IN LINE_OPERATION LineOperation
IN LINE_OPERATION LineOperation,
IN UINTN LineLength
)
{
UINTN ArmCacheLineLength = ArmDataCacheLineLength();
UINTN ArmCacheLineAlignmentMask = ArmCacheLineLength - 1;
UINTN ArmCacheLineAlignmentMask = LineLength - 1;
// Align address (rounding down)
UINTN AlignedAddress = (UINTN)Start - ((UINTN)Start & ArmCacheLineAlignmentMask);
@ -34,7 +35,7 @@ CacheRangeOperation (
// Perform the line operation on an address in each cache line
while (AlignedAddress < EndAddress) {
LineOperation(AlignedAddress);
AlignedAddress += ArmCacheLineLength;
AlignedAddress += LineLength;
}
ArmDataSynchronizationBarrier ();
}
@ -64,8 +65,14 @@ InvalidateInstructionCacheRange (
IN UINTN Length
)
{
CacheRangeOperation (Address, Length, ArmCleanDataCacheEntryToPoUByMVA);
ArmInvalidateInstructionCache ();
CacheRangeOperation (Address, Length, ArmCleanDataCacheEntryToPoUByMVA,
ArmDataCacheLineLength ());
CacheRangeOperation (Address, Length,
ArmInvalidateInstructionCacheEntryToPoUByMVA,
ArmInstructionCacheLineLength ());
ArmInstructionSynchronizationBarrier ();
return Address;
}
@ -85,7 +92,8 @@ WriteBackInvalidateDataCacheRange (
IN UINTN Length
)
{
CacheRangeOperation(Address, Length, ArmCleanInvalidateDataCacheEntryByMVA);
CacheRangeOperation(Address, Length, ArmCleanInvalidateDataCacheEntryByMVA,
ArmDataCacheLineLength ());
return Address;
}
@ -105,7 +113,8 @@ WriteBackDataCacheRange (
IN UINTN Length
)
{
CacheRangeOperation(Address, Length, ArmCleanDataCacheEntryByMVA);
CacheRangeOperation(Address, Length, ArmCleanDataCacheEntryByMVA,
ArmDataCacheLineLength ());
return Address;
}
@ -116,6 +125,7 @@ InvalidateDataCacheRange (
IN UINTN Length
)
{
CacheRangeOperation(Address, Length, ArmInvalidateDataCacheEntryByMVA);
CacheRangeOperation(Address, Length, ArmInvalidateDataCacheEntryByMVA,
ArmDataCacheLineLength ());
return Address;
}

5
ArmPkg/Library/ArmLib/AArch64/AArch64Support.S
View File

@ -23,6 +23,7 @@ GCC_ASM_EXPORT (ArmInvalidateInstructionCache)
GCC_ASM_EXPORT (ArmInvalidateDataCacheEntryByMVA)
GCC_ASM_EXPORT (ArmCleanDataCacheEntryByMVA)
GCC_ASM_EXPORT (ArmCleanDataCacheEntryToPoUByMVA)
GCC_ASM_EXPORT (ArmInvalidateInstructionCacheEntryToPoUByMVA)
GCC_ASM_EXPORT (ArmCleanInvalidateDataCacheEntryByMVA)
GCC_ASM_EXPORT (ArmInvalidateDataCacheEntryBySetWay)
GCC_ASM_EXPORT (ArmCleanDataCacheEntryBySetWay)
@ -80,6 +81,10 @@ ASM_PFX(ArmCleanDataCacheEntryToPoUByMVA):
dc cvau, x0 // Clean single data cache line to PoU
ret
ASM_PFX(ArmInvalidateInstructionCacheEntryToPoUByMVA):
ic ivau, x0 // Invalidate single instruction cache line to PoU
ret
ASM_PFX(ArmCleanInvalidateDataCacheEntryByMVA):
dc civac, x0 // Clean and invalidate single data cache line

5
ArmPkg/Library/ArmLib/ArmV7/ArmV7Support.S
View File

@ -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