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port-evbmips/52238: evbmips64el installation works on gxemul but doesn't work on qemu.

>Number:         52238
>Category:       port-evbmips
>Synopsis:       evbmips64el installation works on gxemul but doesn't work on qemu.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-evbmips-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 17 03:25:01 +0000 2017
>Originator:     Utkarsh Anand
>Release:        7.99.71
I successfully installed the evbmips64el port on gxemul but was unable to install it on qemu. Trying to boot it on qemu takes me to the 'db>' prompt. Here's the output and backtrace:

panic: pcib_isa_intr_string: bogus isa irq 0x0
kernel: breakpoint trap
Stopped in pid 0.1 (system) at  netbsd:cpu_Debugger+0x4:        jr      ra
                bdslot: nop
db> bt
0xffffffff805977f0: cpu_Debugger+4 (63061,90000000180003f8,6,ffffffff804c2290) ra ffffffff8030acd0 sz 0
0xffffffff805977f0: vpanic+158 (63061,90000000180003f8,6,ffffffff804c2290) ra ffffffff8030ad7c sz 64
0xffffffff80597830: panic+34 (63061,ffffffff803d65b0,0,40) ra ffffffff80109784 sz 96
0xffffffff80597890: pcib_isa_intr_string+6c (63061,ffffffff803d65b0,0,40) ra ffffffff80149bfc sz 16
0xffffffff805978a0: uhci_pci_attach+16c (63061,ffffffff803d65b0,0,40) ra ffffffff802f0400 sz 176
0xffffffff80597950: config_attach_loc+1c8 (63061,ffffffff803d65b0,0,40) ra ffffffff802f053c sz 64
0xffffffff80597990: config_found_sm_loc+5c (63061,ffffffff803d65b0,0,40) ra ffffffff80121354 sz 64
0xffffffff805979d0: pci_probe_device+524 (63061,ffffffff803d65b0,0,0) ra ffffffff80121548 sz 288
0xffffffff80597af0: pci_enumerate_bus+1d0 (63061,ffffffff803d65b0,0,0) ra ffffffff8012167c sz 160
0xffffffff80597b90: pcirescan+5c (63061,ffffffff803d65b0,0,0) ra ffffffff801218c4 sz 32
0xffffffff80597bb0: pciattach+19c (63061,ffffffff803d65b0,0,0) ra ffffffff802f0400 sz 80
0xffffffff80597c00: config_attach_loc+1c8 (63061,ffffffff803d65b0,0,0) ra ffffffff802f053c sz 64
0xffffffff80597c40: config_found_sm_loc+5c (63061,ffffffff803d65b0,0,0) ra ffffffff80108934 sz 64
0xffffffff80597c80: gt_attach+7c (63061,ffffffff803d65b0,0,0) ra ffffffff802f0400 sz 112   
0xffffffff80597cf0: config_attach_loc+1c8 (63061,ffffffff803d65b0,0,0) ra ffffffff802f053c sz 64
0xffffffff80597d30: config_found_sm_loc+5c (63061,ffffffff803d65b0,0,0) ra ffffffff801086ac sz 64
0xffffffff80597d70: mainbus_attach+dc (63061,ffffffff803d65b0,0,0) ra ffffffff802f0400 sz 96
0xffffffff80597dd0: config_attach_loc+1c8 (63061,ffffffff803d65b0,0,0) ra ffffffff80104bf8 sz 64
0xffffffff80597e10: cpu_configure+28 (63061,ffffffff803d65b0,0,0) ra ffffffff803d5f30 sz 16
0xffffffff80597e20: main+3a0 (63061,ffffffff803d65b0,0,0) ra ffffffff801000dc sz 128       
0xffffffff80597ea0: kernel_text+dc (63061,ffffffff803d65b0,0,0) ra 0 sz 0
User-level: pid 0.1

Build evbmips64el from source and then launch it from qemu (replace the paths relative to your system):

qemu-system-mips64el -cdrom /extra/evbmips64/distrib/evbmips/cdroms/installcd/NetBSD-7.99.71-evbmips-mips64el.iso -hda /extra/evbmips64.img -kernel /extra/evbmips64/releasedir/evbmips/installation/netbsd-INSTALL_MALTA64 -nographic -M malta

(I've decompressed the kernel)

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