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Reset system only when the pre-allocated memory is more than 1.5 of needed memory and boot mode is BOOT_WITH_DEFAULT_SETTING, or less than the needed memory. 

Signed-off-by: Ruiyu Ni<ruiyu.ni@intel.com>
Reviewed-by: Elvin Li<elvin.li@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13748 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
niruiyu 2012-09-27 02:57:01 +00:00
parent 68978a52ae
commit 3999f1feef
1 changed files with 7 additions and 8 deletions
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15
IntelFrameworkModulePkg/Library/GenericBdsLib/BdsMisc.c
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@ -1283,10 +1283,8 @@ BdsLibGetImageHeader (
} }
/** /**
This routine adjusts the memory information for different memory type and This routine adjust the memory information for different memory type and
saves them into the variables for next boot. It conditionally resets the save them into the variables for next boot.
system when the memory information changes. Platform can reserve memory
large enough (125% of actual requirement) to avoid the reset in the first boot.
**/ **/
VOID VOID
BdsSetMemoryTypeInformationVariable ( BdsSetMemoryTypeInformationVariable (
@ -1392,13 +1390,14 @@ BdsSetMemoryTypeInformationVariable (
Next = Previous; Next = Previous;
// //
// Write next varible to 125% * current and Inconsistent Memory Reserved across bootings may lead to S4 fail // Inconsistent Memory Reserved across bootings may lead to S4 fail
// Write next varible to 125% * current when the pre-allocated memory is:
// 1. More than 150% of needed memory and boot mode is BOOT_WITH_DEFAULT_SETTING
// 2. Less than the needed memory
// //
if (Current < Previous) { if ((Current + (Current >> 1)) < Previous) {
if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) { if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {
Next = Current + (Current >> 2); Next = Current + (Current >> 2);
} else if (!MemoryTypeInformationVariableExists) {
Next = MAX (Current + (Current >> 2), Previous);
} }
} else if (Current > Previous) { } else if (Current > Previous) {
Next = Current + (Current >> 2); Next = Current + (Current >> 2);