ADLO: no serial output after sti in loader.s
Simon Xin Cheng
scheng at msica.com
Fri Jul 23 18:57:00 CEST 2004
Hi,
I am working on booting Linux from hard disk with VGA support on an EPIA
board. I am using ADLO to load video bios and bochs bios.
I found an interesting thing. The last two instructions in the loader.s
of ADLO is :
sti
jmp 0xFFFF:0x0000
I turned DEBUG_SERIAL on in rombios.c. But I can not see any debugging
information through serial port after the jumping.
However, if I commented out the sti, I can see all debugging
information. So what is the problem with the sti? Are there any
LinuxBIOS interrupt service routines that never return back?
Simon
More information about the coreboot
mailing list