[coreboot] SimNOW VGA int 1a

ron minnich rminnich at gmail.com
Thu Oct 16 17:34:52 CEST 2008


On Thu, Oct 16, 2008 at 5:39 AM, Myles Watson <mylesgw at gmail.com> wrote:
tter.
>
> I get a
> Execution halted due to Stopping SimNow due to unhandled case(s)
>
> EAX=00000001 EBX=000163A8 ECX=80012010 EDX=00000FDC
> ESI=0000B10D EDI=00000001 ESP=00000F34 EBP=00000020
> CS=0010 DS=0018 ES=0018 FS=0018 GS=0018 SS=0018 EFLAGS=oditSzapc
> GIF=1 ASID=00000000 HCR3=0000000000000000
> VMHSAVEPA=0000000000000000 GuestVMCBPA=0000000000000000
>
> 0010:FFFFF07D 0000             add [eax],al
> 0010:FFFFF07F 007000           add [eax+00],dh
> 0010:FFFFF082 0000             add [eax],al
> 0010:FFFFF084 0018             add [eax],bl
> 0010:FFFFF086 01B44800000000   add [eax+ecx*2+00000000],esi
> 0010:FFFFF08D 0000             add [eax],al
> 0010:FFFFF08F 007000           add [eax+00],dh
> 0010:FFFFF092 0000             add [eax],al
> 0010:FFFFF094 0018             add [eax],bl
> 0010:FFFFF096 01BC4800000000   add [eax+ecx*2+00000000],edi
> 0010:FFFFF09D FF

see where this is is build/coreboot.map. It looks like garbage to me.

>
> The last output on the serial port is:
> biosint: INT# 0x1a
> biosint: eax 0xb102 ebx 0xc002e ecx 0xc2067 edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd0000 esi 0x10000
> biosint:  ip 0x3246   cs 0xc000  flags 0x46
> dev_find_device: find PCI: 1022:2067
> Check Root Device
> Check CPU: 00
> Check APIC: 00
> Check PCI: 00:01.0
> Check PCI: 1022:7462
> Check PCI: 1022:7464
> Check PCI: 1022:7464
> Check PCI: 1022:7464
> Check PCI: 1022:7458
> Check PCI: 1022:7468
> Check PCI: 1022:7469
> Check PCI: 1022:746a
> Check PCI: 1022:746e
> Check PCI: 1022:746e
> Check PCI: 1022:746e
> Check PCI: 1022:1100
> Check PCI: 1022:1100
> Check PCI: 00:02.0
> Check PCI: 1022:1100
> Check PCI: 1022:1101
> Check PCI: 1022:1102
> Check PCI: 1022:1103
> Check IOPORT: 2e
> Check APIC_CLUSTER: 1022:1100
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PNP: 0000
> Check PCI: 1022:7460
> Check PCI: 1022:7468
> Check PCI: 1022:7469
> Check PCI: 1022:746a
> Check PCI: 1022:746b
> Check PCI: 1022:746d
> Check PCI: 1022:746e
> Check PCI: 1022:746f
> Check PCI: 1022:7459
> Check PCI: 1022:7458
> Check PCI: 1022:7459
> Check PCI: 1022:7464
> Check PCI: 1022:7464
> Check PCI: 1022:7463
> Check PCI: 1022:7462
> Check PCI: 1022:2067
> found
> 0xb102: return 0x120

so that worked.

> biosint: INT# 0x1a
> biosint: eax 0xb108 ebx 0x120 ecx 0xc2067 edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd000a esi 0x10000
> biosint:  ip 0x325a   cs 0xc000  flags 0x46
> 0xb108: bus 1 devfn 0x20 reg 0xa val 0x0
> biosint: INT# 0x1a
> biosint: eax 0xb109 ebx 0x120 ecx 0x0 edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd0008 esi 0x10000
> biosint:  ip 0x3269   cs 0xc000  flags 0x46
> 0xb109: bus 1 devfn 0x20 reg 0x8 val 0x3
> biosint: INT# 0x1a
> biosint: eax 0xb10a ebx 0x120 ecx 0x3 edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd0018 esi 0x10000
> biosint:  ip 0x3283   cs 0xc000  flags 0x46
> 0xb10a: bus 1 devfn 0x20 reg 0x18 val 0x1001
> biosint: INT# 0x1a
> biosint: eax 0xb10a ebx 0x120 ecx 0x1000 edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd0014 esi 0x100b1
> biosint:  ip 0x3294   cs 0xc000  flags 0x46
> 0xb10a: bus 1 devfn 0x20 reg 0x14 val 0xfe055000
> biosint: INT# 0x1a
> biosint: eax 0xb10a ebx 0x120 ecx 0xfe055000 edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd0010 esi 0x100ad
> biosint:  ip 0x32a2   cs 0xc000  flags 0x46
> 0xb10a: bus 1 devfn 0x20 reg 0x10 val 0xfd000000
> biosint: INT# 0x1a
> biosint: eax 0xb10d ebx 0x120 ecx 0xffffffff edx 0xf1022
> biosint: ebp 0xcf0d8 esp 0xfe4 edi 0xd0010 esi 0x100a9
> biosint:  ip 0x32b3   cs 0xc000  flags 0x46

going through looking for several things I guess? The esp looks ok.

I suggest you set a break at c32b3 and see what you see.

ron




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