Hello again,

 

I have a need in my option ROM to interrogate devices identified by the BIOS PCI bus enumeration process.  It seems like the most straight forward way to do this would be to use INT 1A assuming seaBios supports PCI 2.0 or later, to search for all instances of devices which I’m interested in.  Can anyone confirm whether seaBios supports PCI 2.0 or later?  I see a hardcoded org at 0xfe6e in romlayout.S that appears to be the entry to that handler.  I’ve tried using the INT instruction as well as calling directly to 0xf000fe6e.  Direct calls result in KVM crash as below.  I suspect this is due to not using the proper 16/32 bit call interface.  Using INT 1A I don’t appear to be going through this code at all.

 

Thanks.

 

Bob

 

Running option rom at ca80:0003

KVM internal error. Suberror: 1

emulation failure

EAX=0000b102 EBX=0000ffff ECX=00008547 EDX=000011f8

ESI=00000000 EDI=000058b0 EBP=00000000 ESP=00006e4c

EIP=f000fe6e EFL=00010202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0

ES =f000 000f0000 ffffffff 00809300

CS =ca80 000ca800 ffffffff 00809b00

SS =0000 00000000 ffffffff 00809300

DS =0000 00000000 ffffffff 00809300

FS =0000 00000000 ffffffff 00809300

GS =0000 00000000 ffffffff 00809300

LDT=0000 00000000 0000ffff 00008200

TR =0000 00000000 0000ffff 00008b00

GDT=     000f59c0 00000037

IDT=     00000000 000003ff

CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000

DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000

DR6=00000000ffff0ff0 DR7=0000000000000400

EFER=0000000000000000

Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

qemu: terminating on signal 2

 

Robert (Bob) L Moore

Firmware Engineer

CIBU Platform

o: 719-799-4642 (ext. 244642)

robert.moore@hgst.com

 

cid:image001.png@01D13689.346E0520

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