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

IntelFrameworkModulePkg AcpiS3SaveDxe: Reduce reserved memory consumption

Browse Source 
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.

When BIOS does not support long mode waking vector, only allocate
2 pages (1G page enabled) or 6 pages for 4G page table, and 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@18068 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng
2015-07-27 03:04:03 +00:00
committed by lzeng14
parent c6368abcf0
commit 353f5ba92f
2 changed files with 128 additions and 78 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
IntelFrameworkModulePkg/Universal/Acpi/AcpiS3SaveDxe/AcpiS3SaveDxe.inf
View File

@@ -1,7 +1,7 @@
## @file
# AcpiS3Save module installs ACPI S3 Save protocol to prepare S3 boot data.
#
# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2006 - 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
@@ -77,9 +77,6 @@
gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdS3AcpiReservedMemorySize ## SOMETIMES_CONSUMES
gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdS3BootScriptStackSize ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable ## CONSUMES
## SOMETIMES_CONSUMES
## SOMETIMES_PRODUCES
gEfiMdeModulePkgTokenSpaceGuid.PcdIdentifyMappingPageTablePtr
[Depex]
#