diff options
| author | jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-21 03:45:35 +0000 |
|---|---|---|
| committer | jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-21 03:45:35 +0000 |
| commit | 378175d2584ab0d52922308f6a18e710a36152ef (patch) | |
| tree | efa351a1097b3363614fc5ff84b16597edf24d92 /MdeModulePkg/Core | |
| parent | 125887e7e8a8ad0ed40225ffef5db722491b85a5 (diff) | |
| download | edk2-platforms-378175d2584ab0d52922308f6a18e710a36152ef.tar.xz | |
Add PCD for 1G page table
signed off by: jyao1
reviewed by: jfan12
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12397 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Core')
| -rw-r--r-- | MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf | 3 | ||||
| -rw-r--r-- | MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c | 12 |
2 files changed, 10 insertions, 5 deletions
diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf index 784fdf18f6..7717d0a8d5 100644 --- a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf +++ b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf @@ -96,6 +96,9 @@ [FeaturePcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSupportUefiDecompress
+[Pcd.IA32,Pcd.X64]
+ gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
+
[Depex]
gEfiPeiMemoryDiscoveredPpiGuid AND gEfiPeiLoadFilePpiGuid AND gEfiPeiMasterBootModePpiGuid
diff --git a/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c b/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c index e3ed4b6762..795ae7034c 100644 --- a/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c +++ b/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c @@ -66,11 +66,13 @@ CreateIdentityMappingPageTables ( PAGE_TABLE_1G_ENTRY *PageDirectory1GEntry;
Page1GSupport = FALSE;
- AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
- if (RegEax >= 0x80000001) {
- AsmCpuid (0x80000001, NULL, NULL, NULL, &RegEdx);
- if ((RegEdx & BIT26) != 0) {
- Page1GSupport = TRUE;
+ if (PcdGetBool(PcdUse1GPageTable)) {
+ AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL);
+ if (RegEax >= 0x80000001) {
+ AsmCpuid (0x80000001, NULL, NULL, NULL, &RegEdx);
+ if ((RegEdx & BIT26) != 0) {
+ Page1GSupport = TRUE;
+ }
}
}
|