sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MdeModulePkg CapsuleX64: Reduce reserved memory consumption

Browse Source 
We are going to reduce reserved memory consumption by page table buffer,
then OS can have more available memory to use.
Take PhysicalAddressBits = 48 and 2MB page granularity as example,
1:1 Virtual to Physical identity mapping page table buffer needs to be
((512 + 1) * 512 + 1) * 4096 = 1075843072 bytes = 0x40201000 bytes.

The code is updated to build 4G page table by default and only use 8 extra
pages to handles > 4G request by page fault.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18069 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng
2015-07-27 03:04:41 +00:00
committed by lzeng14
parent 353f5ba92f
commit 716087e2be
6 changed files with 478 additions and 132 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
MdeModulePkg/Universal/CapsulePei/Common/CommonHeader.h
View File

@@ -1,7 +1,7 @@
/** @file
Common header file.
Copyright (c) 2011 - 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
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
@@ -15,6 +15,11 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#ifndef _CAPSULE_COMMON_HEADER_
#define _CAPSULE_COMMON_HEADER_
//
// 8 extra pages for PF handler.
//
#define EXTRA_PAGE_TABLE_PAGES 8
//
// This capsule PEIM puts its private data at the start of the
// coalesced capsule. Here's the structure definition.
@@ -33,6 +38,7 @@ typedef struct {
#define CAPSULE_TEST_SIGNATURE SIGNATURE_32('T', 'E', 'S', 'T')
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
#pragma pack(1)
typedef struct {
EFI_PHYSICAL_ADDRESS EntryPoint;
EFI_PHYSICAL_ADDRESS StackBufferBase;
@@ -41,14 +47,23 @@ typedef struct {
EFI_PHYSICAL_ADDRESS BlockListAddr;
EFI_PHYSICAL_ADDRESS MemoryBase64Ptr;
EFI_PHYSICAL_ADDRESS MemorySize64Ptr;
BOOLEAN Page1GSupport;
} SWITCH_32_TO_64_CONTEXT;
typedef struct {
UINT16 ReturnCs;
EFI_PHYSICAL_ADDRESS ReturnEntryPoint;
UINT64 ReturnStatus;
//
// NOTICE:
// Be careful about the Base field of IA32_DESCRIPTOR
// that is UINTN type.
// To extend new field for this structure, add it to
// right before this Gdtr field.
//
IA32_DESCRIPTOR Gdtr;
} SWITCH_64_TO_32_CONTEXT;
#pragma pack()
#endif
/**