I add the code to amd_earlymtrr.c but found two problem 1. in the cpu init, the second cpu cache can not be enabled. (still using value set by amd_earlymtrr.c). ( before the amd_mtrr.c called by init). 2. some slow in auto.c stage. Maybe because of before enable cache for LinuxBIOS rom flash, there is more instruction to enable fixed mtrrs.
So I prefer to two phase dev_init loop.
If you want me send the amd_earlymtrr.c with fixed mtrr enablement, please let me know.
YH
-----Original Message----- From: Li-Ta Lo [mailto:ollie@lanl.gov] Sent: Friday, January 14, 2005 2:13 PM To: YhLu Cc: Sagiv Yefet; LinuxBIOS Subject: RE: Running with VGA
On Fri, 2005-01-14 at 12:45, YhLu wrote:
I check the amd_early_mtrr.c with old amd earymtrr.inc. It seems the only difference is not enable SYSCFG_MSR_MtrrFixDramModEn before clear MTRR fixed.
Probably I didn't commit all the old code I used to have. Anyway, the things we have to do in early_mtrr.c are:
1. enable SYSCFG_MSR_MtrrFixDramModEn 2. set fixed mtrrs for 0-0x9FFFF and 0xC0000-0xFFFFF as WB and READ_MEM and WRITE_MEM 3. set fixed mtrrs for 0xA0000-0xBFFF to UC 4. disable SYSCFG_MSR_MtrrFixDramModEn 5. enable SYSCFG_MSR_MtrrFixDramEn
Ollie
I enable that, but the result shows no change....
YH