This function parses Xen OVMF info and arrange memory maps accordingly.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
OvmfPkg/PlatformPei/Platform.c | 70 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index 9b7828f..c2e7ba9 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -34,6 +34,10 @@
#include <Guid/MemoryTypeInformation.h>
#include <Ppi/MasterBootMode.h>
#include <IndustryStandard/Pci22.h>
+#include <Guid/XenInfo.h>
+#include <IndustryStandard/E820.h>
+#include <Library/ResourcePublicationLib.h>
+#include <Library/MtrrLib.h>
#include "Platform.h"
#include "Cmos.h"
@@ -163,6 +167,72 @@ AddUntestedMemoryRangeHob (
AddUntestedMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit -
MemoryBase));
}
+VOID
+XenMemMapInitialization (
+ VOID
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+ EFI_XEN_INFO *Info;
+
+ DEBUG ((EFI_D_ERROR, "Using memory map provided by Xen\n"));
+
+ GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
+
+ ASSERT (GuidHob != NULL);
+
+ Info = GET_GUID_HOB_DATA (GuidHob);
+
+ //
+ // Create Memory Type Information HOB
+ //
+ BuildGuidDataHob (
+ &gEfiMemoryTypeInformationGuid,
+ mDefaultMemoryTypeInformation,
+ sizeof(mDefaultMemoryTypeInformation)
+ );
+
+ //
+ // Add PCI IO Port space available for PCI resource allocations.
+ //
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_IO,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
+ 0xC000,
+ 0x4000
+ );
+
+ //
+ // Video memory + Legacy BIOS region
+ //
+ AddIoMemoryRangeHob (0x0A0000, BASE_1MB);
+
+ //
+ // Parse RAM in E820 map
+ //
+ if (Info->E820EntriesCount > 0) {
+ EFI_E820_ENTRY64 *E820Map, *Entry;
+ UINT16 Loop;
+
+ E820Map = (EFI_E820_ENTRY64 *) Info->E820;
+ for (Loop = 0; Loop < Info->E820EntriesCount; Loop++) {
+ Entry = E820Map + Loop;
+
+ // only care about RAM
+ if (Entry->Type != EfiAcpiAddressRangeMemory)
+ continue;
+
+ if (Entry->BaseAddr >= BASE_4GB)
+ AddUntestedMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);
+ else
+ AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);
+
+ MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length,
CacheWriteBack);
+ }
+ }
+}
+
VOID
MemMapInitialization (
--
1.7.10.4