Sorry to bud in again but we constantly keep talking about linuxbios and mini-tx mobos :) keep up to date on the discussion:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=6552&perpa... genumber=1
----- Original Message ----- From: "Steve M. Gehlbach" steve@nexpath.com To: linuxbios@clustermatic.org Sent: Wednesday, October 09, 2002 11:32 PM Subject: RE: LinuxBios support for Via Mini-ITX motherboard
I spent some time on it. It has trouble to jump to hardwaremain from crt0.base somehow. I'm tracking it at the moment.
When I had this problem it always got back to a DRAM issue.
I agree. Below is my favorite "check and see if the copy worked" hack for crt0.base. There is an extra pattern test if the copy fails for some
reason
or other that I don't remember. Maybe we ought to always compare ram to flash as a sanity check after the copy.
-Steve
// see if copy succeeded leal EXT(_liseg), %esi leal EXT(_iseg), %edi cmpl %esi, %edi jz .Lnocopy movl $EXT(_eliseg), %ecx subl %esi, %ecx jz .Lnocopy /* should not happen */ 0: cmpsb jnz .failed loop 0b
CONSOLE_DEBUG_TX_STRING($str_success) jmp .Lnocopy.failed: CONSOLE_DEBUG_TX_STRING($str_failed) CONSOLE_DEBUG_TX_HEX32(%ecx) CONSOLE_DEBUG_TX_STRING($str_crlf) leal EXT(_liseg), %esi movl $0xa5a5a5a5,0(%esi) movl 0(%esi),%eax cmpl $0xa5a5a5a5,%eax jne 1f CONSOLE_DEBUG_TX_STRING($str_g1) jmp .Lnocopy 1: CONSOLE_DEBUG_TX_STRING($str_f1) CONSOLE_DEBUG_TX_STRING($str_failed) CONSOLE_DEBUG_TX_HEX32(%eax) CONSOLE_DEBUG_TX_STRING($str_crlf) jmp . - 2 hlt /* no sense in going on */
.Lnocopy ....
(at the end)
str_success: .string "\n\rRam compare succeeded.\r\n" str_failed: .string "\n\rRam compare failed: val: " str_crlf: .string "\n\r" str_f1: .string "test 1 failed.\n\r" str_g1: .string "test 1 okay.\n\r"
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