The problem is no body touch that range. Even init_ecc_memory will skip the first 1M range.
YH -----Original Message----- From: Li-Ta Lo [mailto:ollie@lanl.gov] Sent: Thursday, January 13, 2005 7:50 PM To: YhLu Cc: Sagiv Yefet; LinuxBIOS Subject: RE: Running with VGA
On Thu, 2005-01-13 at 19:50, YhLu wrote:
It seems after if after cpu init do the onboard vga init, it will work.
The CPU init only do the init ECC and clear that after 1M. ... Werid! And
it
is not wiped out after power off.
I read your log file again. The font buffer address (0xA0000 - 0xBFFFF) is controlled by MTRR. The MTRR can direct access of this region to the main memory or to IO cards. Because the VGA card is inited before CPU, the MTRRs are not inited correctly. When BIOS loads font data, it loads it into main memory not the DRAM on the card (actually also on the mainboard).
Ollie