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AcpiS3Save could try to check PcdIdentifyMappingPageTablePtr is NULL, if it is not, it means someone else has allocate memory for page table, AcpiS3Save could re-use this memory. 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Elvin Li <elvin.li@intel.com>
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15910 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Elvin Li 2014-08-26 12:28:15 +00:00 committed by li-elvin
parent b5040e4c55
commit ac790db940
2 changed files with 66 additions and 57 deletions
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6
IntelFrameworkModulePkg/Universal/Acpi/AcpiS3SaveDxe/AcpiS3Save.c
View File

@ -328,6 +328,10 @@ S3CreateIdentityMappingPageTables (
VOID *Hob;
BOOLEAN Page1GSupport;
S3NvsPageTableAddress = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdIdentifyMappingPageTablePtr);
if (S3NvsPageTableAddress != 0x0) {
return S3NvsPageTableAddress;
} else {
Page1GSupport = FALSE;
if (PcdGetBool(PcdUse1GPageTable)) {
AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
@ -389,7 +393,9 @@ S3CreateIdentityMappingPageTables (
//
S3NvsPageTableAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)AllocateMemoryBelow4G (EfiReservedMemoryType, EFI_PAGES_TO_SIZE(TotalPageTableSize));
ASSERT (S3NvsPageTableAddress != 0);
PcdSet64 (PcdIdentifyMappingPageTablePtr, S3NvsPageTableAddress);
return S3NvsPageTableAddress;
}
} else {
//
// If DXE is running 32-bit mode, no need to establish page table.

3
IntelFrameworkModulePkg/Universal/Acpi/AcpiS3SaveDxe/AcpiS3SaveDxe.inf
View File

@ -75,6 +75,9 @@
gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdS3AcpiReservedMemorySize ## CONSUMES
gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdS3BootScriptStackSize ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
## SOMETIMES_CONSUMES
## SOMETIMES_PRODUCES
gEfiMdeModulePkgTokenSpaceGuid.PcdIdentifyMappingPageTablePtr
[Depex]
#