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OvmfPkg: introduce XenMemMapInitialization 

This function parses E820 map provided by Xen and arrange memory maps
accordingly.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
[jordan.l.justen@intel.com: XenGetE820Map: VS2010 compat; add assert]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14945 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Wei Liu 2013-12-08 01:36:15 +00:00 committed by jljusten
parent 36658fff45
commit bb6a9a9305
3 changed files with 109 additions and 1 deletions
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72
OvmfPkg/PlatformPei/Platform.c
View File

@ -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 +167,74 @@ AddUntestedMemoryRangeHob (
AddUntestedMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
}
VOID
XenMemMapInitialization (
VOID
)
{
EFI_E820_ENTRY64 *E820Map;
UINT32 E820EntriesCount;
EFI_STATUS Status;
DEBUG ((EFI_D_INFO, "Using memory map provided by Xen\n"));
//
// 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
//
Status = XenGetE820Map(&E820Map, &E820EntriesCount);
ASSERT_EFI_ERROR (Status);
if (E820EntriesCount > 0) {
EFI_E820_ENTRY64 *Entry;
UINT32 Loop;
for (Loop = 0; Loop < 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 (

8
OvmfPkg/PlatformPei/Platform.h
View File

@ -15,6 +15,8 @@
#ifndef _PLATFORM_PEI_H_INCLUDED_
#define _PLATFORM_PEI_H_INCLUDED_
#include <IndustryStandard/E820.h>
VOID
AddIoMemoryBaseSizeHob (
EFI_PHYSICAL_ADDRESS MemoryBase,
@ -82,4 +84,10 @@ XenDetect (
VOID
);
EFI_STATUS
XenGetE820Map (
EFI_E820_ENTRY64 **Entries,
UINT32 *Count
);
#endif // _PLATFORM_PEI_H_INCLUDED_

30
OvmfPkg/PlatformPei/Xen.c
View File

@ -1,7 +1,7 @@
/**@file
Xen Platform PEI support
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>
This program and the accompanying materials
@ -29,9 +29,37 @@
#include <Guid/XenInfo.h>
#include "Platform.h"
#include "Xen.h"
EFI_XEN_INFO mXenInfo;
/**
Returns E820 map provided by Xen
@param Entries Pointer to E820 map
@param Count Number of entries
@return EFI_STATUS
**/
EFI_STATUS
XenGetE820Map (
EFI_E820_ENTRY64 **Entries,
UINT32 *Count
)
{
EFI_XEN_OVMF_INFO *Info =
(EFI_XEN_OVMF_INFO *)(UINTN) OVMF_INFO_PHYSICAL_ADDRESS;
if (AsciiStrCmp ((CHAR8 *) Info->Signature, "XenHVMOVMF")) {
return EFI_NOT_FOUND;
}
ASSERT (Info->E820 < MAX_ADDRESS);
*Entries = (EFI_E820_ENTRY64 *)(UINTN) Info->E820;
*Count = Info->E820EntriesCount;
return EFI_SUCCESS;
}
/**
Connects to the Hypervisor.