Add initial version of Open Virtual Machine Firmware (OVMF) platform.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8398 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
100
OvmfPkg/PlatformPei/MemDetect.c
Normal file
100
OvmfPkg/PlatformPei/MemDetect.c
Normal file
@@ -0,0 +1,100 @@
|
||||
/**@file
|
||||
Memory Detection for Virtual Machines.
|
||||
|
||||
Copyright (c) 2006 - 2009, Intel Corporation
|
||||
All rights reserved. This program and the accompanying materials
|
||||
are licensed and made available under the terms and conditions of the BSD License
|
||||
which accompanies this distribution. The full text of the license may be found at
|
||||
http://opensource.org/licenses/bsd-license.php
|
||||
|
||||
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
|
||||
Module Name:
|
||||
|
||||
MemDetect.c
|
||||
|
||||
**/
|
||||
|
||||
//
|
||||
// The package level header files this module uses
|
||||
//
|
||||
#include <PiPei.h>
|
||||
|
||||
//
|
||||
// The Library classes this module consumes
|
||||
//
|
||||
#include <Library/DebugLib.h>
|
||||
#include <Library/HobLib.h>
|
||||
#include <Library/IoLib.h>
|
||||
#include <Library/PeimEntryPoint.h>
|
||||
#include <Library/ResourcePublicationLib.h>
|
||||
|
||||
#include "Platform.h"
|
||||
#include "Cmos.h"
|
||||
|
||||
STATIC
|
||||
UINTN
|
||||
GetSystemMemorySize (
|
||||
)
|
||||
{
|
||||
UINT8 Cmos0x34;
|
||||
UINT8 Cmos0x35;
|
||||
|
||||
//
|
||||
// CMOS 0x34/0x35 specifies the system memory above 16 MB.
|
||||
// * CMOS(0x35) is the high byte
|
||||
// * CMOS(0x34) is the low byte
|
||||
// * The size is specified in 64kb chunks
|
||||
// * Since this is memory above 16MB, the 16MB must be added
|
||||
// into the calculation to get the total memory size.
|
||||
//
|
||||
|
||||
Cmos0x34 = (UINT8) CmosRead8 (0x34);
|
||||
Cmos0x35 = (UINT8) CmosRead8 (0x35);
|
||||
|
||||
return ((((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Peform Memory Detection
|
||||
|
||||
@return EFI_SUCCESS The PEIM initialized successfully.
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
MemDetect (
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
EFI_PHYSICAL_ADDRESS MemoryBase;
|
||||
UINT64 MemorySize;
|
||||
UINT64 TotalMemorySize;
|
||||
|
||||
DEBUG ((EFI_D_ERROR, "MemDetect called\n"));
|
||||
|
||||
//
|
||||
// Determine total memory size available
|
||||
//
|
||||
TotalMemorySize = (UINT64)GetSystemMemorySize ();
|
||||
|
||||
MemoryBase = 0x800000;
|
||||
MemorySize = TotalMemorySize - MemoryBase - 0x100000;
|
||||
|
||||
//
|
||||
// Publish this memory to the PEI Core
|
||||
//
|
||||
Status = PublishSystemMemory(MemoryBase, MemorySize);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
|
||||
//
|
||||
// Create memory HOBs
|
||||
//
|
||||
AddMemoryBaseSizeHob (MemoryBase, MemorySize);
|
||||
AddMemoryRangeHob (0x100000, 0x800000);
|
||||
AddMemoryRangeHob (0x000000, 0x0A0000);
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
Reference in New Issue
Block a user