Hi,
This isn't the answer, but I'm attempting to provide triage for jhb who
will probably look at it.
This is a GPF, but it's not being caused by an attempt to enter
protected mode, so it isn't the most-often reported BTX issue.
wsk@gddsn.org.cn wrote:> 6.2R cd boot failed with follow error,and the MegaRAID fw version is
FW_1L33
> thanks with any info
> BTX loader 1.00 BTX version 1.01
> Console: internal video/keyboard
> BIOS CD is cd0
> BIOS drive A: is disk0
> BIOS drive C: is disk1
>
> BIOS 639kB/3668928kB available memory
>
> FreeBSD/i386 bootstrap loader, Revision 1.1
> (root at root@dessler.cse.buffalo.edu, Fri Jan 12 06:40:38 UTC 2007)
>
> int=0000000d err=00000000 efl=00030086 eip=0000c3d4
> eax=00008058 ebx=00002000 ecx=00000007 edx=0000fffa
> esi=0000f69b edi=00040170 epb=000003d8 esp=00000358
> cs=f000 ds=0040 es=5d18 fs=9fc0 gs=f000 ss=9e17
> cs:eip=ec 50 e4 61 58 50 e4 61-58 ee 5a c3 01 00 e4 c3
> 12 00 00 41 d0 0c 02 08-80 00 03 00 79 00 79 00 00
> ss:esp=77 01 03 2c a1 00 08 2c-fa 02 00 e0 00 00 c0 9f
> 00 00 4e 80 f3 ee 00 f0-03 24 00 e0 06 02 00 80
> BTX halted
>
>
>
It looks like BIOS code at f000:c3d4 is trying to read a word from I/O
port 0xfffa, and this is causing a GPF when it tries to write to what
looks like the BIOS data area at 0040:0058; "cursor position for video
page 4".
0: ec in (%dx),%al
1: 50 push %eax
2: e4 61 in $0x61,%al
4: 58 pop %eax
5: 50 push %eax
6: e4 61 in $0x61,%al
8: 58 pop %eax
9: ee out %al,(%dx)
a: 5a pop %edx
b: c3 ret
c: 01 00 add %eax,(%eax)
e: e4 c3 in $0xc3,%al
10: 12 00 adc (%eax),%al
12: 00 41 d0 add %al,0xffffffd0(%ecx)
15: 0c 02 or $0x2,%al
17: 08 80 00 03 00 79 or %al,0x79000300(%eax)
1d: 00 79 00 add %bh,0x0(%ecx)