Sorry for the bother people. I now see that PCI Services is supported (and configured in my source tree). I am now executing code in the 16 bit handler.
Thanks.
Bob
From: Bob Moore Sent: Tuesday, February 16, 2016 4:50 PM To: 'seabios@seabios.org' Subject: INT 1A - PCI Services supported?
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.commailto:robert.moore@hgst.com
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