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authorjyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524>2011-09-21 03:45:35 +0000
committerjyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524>2011-09-21 03:45:35 +0000
commit378175d2584ab0d52922308f6a18e710a36152ef (patch)
treeefa351a1097b3363614fc5ff84b16597edf24d92 /MdeModulePkg/Core
parent125887e7e8a8ad0ed40225ffef5db722491b85a5 (diff)
downloadedk2-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.inf3
-rw-r--r--MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c12
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;
+ }
}
}