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ArmPkg/ArmV7Lib: take MP extensions into account when programming TTBR

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Bits 0 and 6 of the TTBRx system registers have different meanings
depending on whether a system implements the Multiprocessing
Extensions. So use separate memory attribute definitions for MP and
non-MP.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18899 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel
2015-11-18 15:59:59 +00:00
committed by abiesheuvel
parent 42dc8026a8
commit 72143137f4
2 changed files with 12 additions and 7 deletions
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6
ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
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@@ -261,13 +261,13 @@ ArmConfigureMmu (
// Translate the Memory Attributes into Translation Table Register Attributes
if ((TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED) ||
(TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_UNCACHED_UNBUFFERED)) {
TTBRAttributes = TTBR_NON_CACHEABLE;
TTBRAttributes = ArmHasMpExtensions () ? TTBR_MP_NON_CACHEABLE : TTBR_NON_CACHEABLE;
} else if ((TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK) ||
(TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK)) {
TTBRAttributes = TTBR_WRITE_BACK_ALLOC;
TTBRAttributes = ArmHasMpExtensions () ? TTBR_MP_WRITE_BACK_ALLOC : TTBR_WRITE_BACK_ALLOC;
} else if ((TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH) ||
(TranslationTableAttribute == ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_THROUGH)) {
TTBRAttributes = TTBR_WRITE_THROUGH;
TTBRAttributes = ArmHasMpExtensions () ? TTBR_MP_WRITE_THROUGH : TTBR_WRITE_THROUGH;
} else {
ASSERT (0); // No support has been found for the attributes of the memory region that the translation table belongs to.
return RETURN_UNSUPPORTED;