AMD Phenom 8450 Triple-Core HD8450WCGHBOX ユーザーズマニュアル
製品コード
HD8450WCGHBOX
40
Product Errata
41322
Rev. 3.16 February 2008
Revision Guide for AMD Family 10h Processors
300 Hardware Memory Clear Is Not Supported After Software DRAM
Initialization
Description
When using software-controlled DRAM device initialization through EnDramInit (F2x[1, 0]7C
DRAM Initialization Register[31]), hardware memory clear using MemClrInit (F2x110 DRAM
Controller Select Low Register[3]) does not function.
DRAM Initialization Register[31]), hardware memory clear using MemClrInit (F2x110 DRAM
Controller Select Low Register[3]) does not function.
Potential Effect on System
After BIOS sets MemClrInit (F2x110[3]), the hardware will not clear memory and will not set
MemCleared (F2x110[10]). The BIOS will hang waiting for the operation to complete.
MemCleared (F2x110[10]). The BIOS will hang waiting for the operation to complete.
Suggested Workaround
BIOS should use hardware initialization of DRAM using InitDram (F2x[1, 0]90 DRAM
Configuration Low Register[0]). If BIOS uses software initialization, alternative methods to initialize
ECC must be used.
Configuration Low Register[0]). If BIOS uses software initialization, alternative methods to initialize
ECC must be used.
Fix Planned
Yes