Re: OpenMPIC controller emulation in qemu

[Jd Lyons]

I think the soft-reset is what we may need but the gpio stuff may also be important.

Last login: Sat Feb 15 12:30:21 on ttys000
jam@Mac ~ % cd q3/qemu/build
jam@Mac build % ./qemu-system-ppc64-unsigned   -m 1024  -cpu 7455 -hda ~/Snow*.img -prom-env 'boot-args=-v -x -s' -smp 2,cores=1,threads=1,sockets=2 -accel tcg,thread=multi -d guest_errors  -cdrom /Users/jam/Downloads/ubuntu-mate-16.04.1-desktop-powerpc.iso   -boot d  -device usb-mouse -boot d -prom-env 'auto-boot?=false'   -M mac99,via=pmu -nographic -bios /Users/jam/Documents/openbios-qemu.elf 
WARNING: Image format was not specified for '/Users/jam/SnowLeopardPPC.img' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
s>> et_property: NULL phandle
> > =============================================================
> > OpenBIOS 1.1 [Feb 14 2025 10:28]
> > Configuration device id QEMU version 1 machine id 1
> > CPUs: 2
> > Memory: 1024M
> > UUID: 00000000-0000-0000-0000-000000000000
> > CPU type PowerPC,G4
> > CPU type PowerPC,G4

milliseconds isn't unique.
Welcome to OpenBIOS v1.1 built on Feb 14 2025 10:28

0 > dev /cpus/@0 .properties 
name                      "PowerPC,G4"
device_type               "cpu"
cpu-version               80010302 
d-cache-size              8000 
i-cache-size              8000 
d-cache-sets              80 
i-cache-sets              80 
d-cache-block-size        20 
i-cache-block-size        20 
tlb-sets                  40 
tlb-size                  80 
timebase-frequency        17d7840 
clock-frequency           35a4e900 
bus-frequency             5f5e100 
state                     "running"
reservation-granule-size  20 
reg                       00000000
available                 00004000   03ffc000
                          04800000   3b458000
                          3fe10000   401f0000
translations              04000000   00800000   04000000   00000000
                          3fc58000   001b8000   3fc58000   00000000
                          fff00000   00100000   3ff00000   00000000
 ok
0 > dev /cpus/@1 .properties 
name                      "PowerPC,G4"
device_type               "cpu"
cpu-version               80010302 
d-cache-size              8000 
i-cache-size              8000 
d-cache-sets              80 
i-cache-sets              80 
d-cache-block-size        20 
i-cache-block-size        20 
tlb-sets                  40 
tlb-size                  80 
timebase-frequency        17d7840 
clock-frequency           35a4e900 
bus-frequency             5f5e100 
state                     "running"
reservation-granule-size  20 
reg                       00000001
 ok
0 >
> On Feb 15, 2025, at 12:24 PM, Jd Lyons  wrote:
>
> Don’t give up yet, we can get more people involved…..
>
> Here is the dump of the DP MDD /cpus node, there is some interesting stuff there….
>
> 0 > dev /cpus/@0 .properties 
> name                    PowerPC,G4
>
> device_type             cpu
> reg                     00000000  
> cpu-version             80010201 
> state                   running
> clock-frequency         33a848a8 
> bus-frequency           07f0db85 
> config-bus-frequency    07f0b5db 
> timebase-frequency      01fc36e1 
> reservation-granule-size00000020 
> tlb-sets                00000040 
> tlb-size                00000080 
> d-cache-size            00008000 
> i-cache-size            00008000 
> d-cache-sets            00000080 
> i-cache-sets            00000080 
> i-cache-block-size      00000020 
> d-cache-block-size      00000020 
> graphics                
> performance-monitor     
> altivec                 
> data-streams            
> l2-cache                ff87fd10 
> l2cr                    80080000 
> existing                00000000 80000000 80000000 80000000 
> available               00003000 7fffd000 d0000000 20000000 
> translations            00000000 00003000 00000000 00000010 80000000 00080000 
>                         80000000 00000028 80080000 00001000 80080000 00000028 
>                         80081000 00001000 80081000 00000028 f0000000 00010000 
>                         f0000000 00000028 f0800000 00001000 f0800000 00000028 
>                         f0c00000 00001000 f0c00000 00000028 f2000000 00010000 
>                         f2000000 00000028 f2800000 00001000 f2800000 00000028 
>                         f2c00000 00001000 f2c00000 00000028 f4000000 00010000 
>                         f4000000 00000028 f4800000 00001000 f4800000 00000028 
>                         f4c00000 00001000 f4c00000 00000028 f5000000 00001000 
>                         f5000000 00000028 f5200000 00200000 f5200000 00000028 
>                         f5200000 00200000 f5200000 00000028 
>                         ... 00000140 bytes total
> cpu-info                8410c0bc 80080000 80010201 00000400 00000000 00000000 
>                         00000000 00000000 
> soft-reset              00000071  <<—————————Here
> gpio-mask               00000001  <<—————————Here
> gpio-value              00000001  <<—————————Here
> performance-monitor-cnt-enable 00000072  
> timebase-enable         00000073  <<—————————Here
> gpio-parent             ff95c318  <<—————————Here
>
> ok
> 0 > dev /cpus/@1  ok
> 0 > .properties 
> name                    PowerPC,G4
>
> device_type             cpu
> reg                     00000001  
> cpu-version             80010201 
> state                   stopped
> clock-frequency         33a848a8 
> bus-frequency           07f0db85 
> config-bus-frequency    07f0b5db 
> timebase-frequency      01fc36e1 
> reservation-granule-size00000020 
> tlb-sets                00000040 
> tlb-size                00000080 
> d-cache-size            00008000 
> i-cache-size            00008000 
> d-cache-sets            00000080 
> i-cache-sets            00000080 
> i-cache-block-size      00000020 
> d-cache-block-size      00000020 
> graphics                
> performance-monitor       
> altivec                 
> data-streams            
> l2-cache                ff880fd0 
> l2cr                    80080000 
> cpu-info                8431c0bc 00000000 80010201 00000400 fff0376c 0000b010 
>                         00060110 21524110 
> soft-reset              00000072  <<—————————Here
> gpio-mask               00000001  <<—————————Here
> gpio-value              00000001  <<—————————Here
> timebase-enable         00000073 
> cpu-interrupt-enable    00000074  <<—————————Here
> gpio-parent             ff95c318  <<—————————Here
>
> customer-sw-config       694-4782
>
> color-code              ff11
> scb#                    00000000 
> display-config-info     ffffffff ffffffff 
> name                    device-tree
> copyright               Copyright 1983-2002 Apple Computer, Inc. All Rights Reserved
> device_type             bootrom
> system-id               0000000000000
> #address-cells          00000001 
> #size-cells             00000001 
> clock-frequency         07f0db85 
> AAPL,add-fcode-file     ff860928
>
> ok
> 0 >
> > On Feb 15, 2025, at 11:53 AM, Andrew Randrianasulu  wrote:
> >
> > сб, 15 февр. 2025 г., 19:37 Jd Lyons <[e-mail] >:
> > > Mate Live CD does default to SMP:
> >
> > Thanks for testing.
> >
> > Unfortunately,I think I just fundamentally misunderstood how IRQ vs IPI works so .. in absence of someone with working understanding of how all this really work this probably will not progress much ...
> >
> > sorry!
> > > > > =============================================================
> > > > > OpenBIOS 1.1 [Feb 14 2025 10:28]
> > > > > Configuration device id QEMU version 1 machine id 1
> > > > > CPUs: 2
> > > > > Memory: 1024M
> > > > > UUID: 00000000-0000-0000-0000-000000000000
> > > > > CPU type PowerPC,G4
> > > > > CPU type PowerPC,G4
> > >
> > > milliseconds isn't unique.
> > > Welcome to OpenBIOS v1.1 built on Feb 14 2025 10:28
> > >
> > > 0 > boot Trying cd:,\:tbxi...
> > > > > switching to new context:
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > call-method color!: exception -21
> > > > > call-method color! failed with error ffffffdf
> > >
> > > Config file read, 2702 bytes
> > >
> > > Welcome to Ubuntu MATE 16.04.1 LTS (Xenial Xerus)!
> > >
> > > This is an Ubuntu MATE live CDROM,
> > > built on 20160719.
> > >
> > > The default option is 'live'.
> > >
> > > If the system fails to boot at all (the typical
> > > symptom is a white screen which doesn't go away),
> > > use 'live video=ofonly'.
> > >
> > > Press the tab key for a list of options, or type
> > > 'help' for help.
> > >
> > > If in doubt, just press Enter, and if that
> > > doesn't work, type 'live video=ofonly'.
> > >
> > > Welcome to yaboot version 1.3.16
> > > Enter "help" to get some basic usage information
> > >
> > > WARNING: Bootstrap partition type is wrong: "Apple_HFS"
> > >          type should be: "Apple_Bootstrap"
> > >
> > > boot: live
> > > Please wait, loading kernel...
> > >    Elf32 kernel loaded...
> > > Loading ramdisk...
> > > ramdisk loaded at 01b00000, size: 22562 Kbytes
> > > OF stdout device is: /pci@f2000000/mac-io@c/escc@13000/ch-a@13020
> > > Preparing to boot Linux version 4.4.0-31-powerpc-smp (buildd@denneed03) (gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2.1) ) #50-Ubuntu SMP Wed Jul 13 00:23:04 UTC 2016 (Ubuntu 4.4.0-31.50-powerpc-smp 4.4.13)
> > > Detected machine type: 00000400
> > > command line: 
> > > memory layout at init:
> > >   memory_limit : 00000000 (16 MB aligned)
> > >   alloc_bottom : 03109000
> > >   alloc_top    : 30000000
> > >   alloc_top_hi : 40000000
> > >   rmo_top      : 30000000
> > >   ram_top      : 40000000
> > > found display   : /pci@f2000000/QEMU,VGA@e, opening... done
> > > copying OF device tree...
> > > Building dt strings...
> > > Building dt structure...
> > > Device tree strings 0x0320a000 -> 0x0320a5ea
> > > Device tree struct  0x0320b000 -> 0x03212000
> > > Quiescing Open Firmware ...
> > > Booting Linux via __start() ...
> > > Trying to read invalid spr 1012 (0x3f4) at 00000000c0015f18
> > > Hello World !
> > > setup_arch: initmem
> > > arch: exit
> > > smp_core99_probe
> > > smp_core99_kick_cpu
> > > smp_core99_kick_cpu done
> > > [    5.131667] Processor 1 is stuck.
> > > [    5.131667] Processor 1 is stuck.
> > >
> > > It tries to kickstart SMP but Processor 1 is stuck!
> > >
> > > [   54.955254] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [   54.955664] ata1.00: failed command: READ DMA
> > > [   54.955950] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [   54.955950]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [   54.956472] ata1.00: status: { DRDY }
> > > [   85.930746] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [   85.931000] ata1.00: failed command: READ DMA
> > > [   85.931149] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [   85.931149]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [   85.931569] ata1.00: status: { DRDY }
> > > [  116.970014] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  116.970250] ata1.00: failed command: READ DMA
> > > [  116.970402] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  116.970402]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  116.970814] ata1.00: status: { DRDY }
> > > [  148.010809] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  148.011048] ata1.00: failed command: READ DMA
> > > [  148.011195] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  148.011195]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  148.011610] ata1.00: status: { DRDY }
> > > [  178.986502] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  178.986758] ata1.00: failed command: READ DMA
> > > [  178.986906] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  178.986906]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  178.987328] ata1.00: status: { DRDY }
> > > [  209.962237] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  209.962474] ata1.00: failed command: READ DMA
> > > [  209.962622] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  209.962622]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  209.963038] ata1.00: status: { DRDY }
> > > [  209.966227] blk_update_request: I/O error, dev sda, sector 0
> > > [  209.966534] Buffer I/O error on dev sda, logical block 0, async page read
> > > [  240.937824] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  240.938059] ata1.00: failed command: READ DMA
> > > [  240.938205] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  240.938205]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  240.938642] ata1.00: status: { DRDY }
> > > [  245.234331] INFO: task swapper/0:1 blocked for more than 120 seconds.
> > > [  245.234688]       Not tainted 4.4.0-31-powerpc-smp #50-Ubuntu
> > > [  245.234864] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > [  245.235822] INFO: task kworker/0:1:30 blocked for more than 120 seconds.
> > > [  245.236016]       Not tainted 4.4.0-31-powerpc-smp #50-Ubuntu
> > > [  245.236176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > [  271.977850] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  271.978090] ata1.00: failed command: READ DMA
> > > [  271.978241] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  271.978241]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  271.978653] ata1.00: status: { DRDY }
> > > [  302.122355] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  302.122600] ata1.00: failed command: READ DMA
> > > [  302.122746] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  302.122746]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  302.123172] ata1.00: status: { DRDY }
> > > [  333.162381] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  333.162651] ata1.00: failed command: READ DMA
> > > [  333.162795] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  333.162795]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  333.163229] ata1.00: status: { DRDY }
> > > [  364.138445] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  364.138696] ata1.00: failed command: READ DMA
> > > [  364.138844] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  364.138844]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  364.139276] ata1.00: status: { DRDY }
> > > [  365.233579] INFO: task swapper/0:1 blocked for more than 120 seconds.
> > > [  365.233825]       Not tainted 4.4.0-31-powerpc-smp #50-Ubuntu
> > > [  365.233992] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > [  365.234445] INFO: task kworker/0:1:30 blocked for more than 120 seconds.
> > > [  365.234633]       Not tainted 4.4.0-31-powerpc-smp #50-Ubuntu
> > > [  365.234792] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > [  365.235276] INFO: task kworker/u4:2:79 blocked for more than 120 seconds.
> > > [  365.235467]       Not tainted 4.4.0-31-powerpc-smp #50-Ubuntu
> > > [  365.235625] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > [  395.178285] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  395.178536] ata1.00: failed command: READ DMA
> > > [  395.178681] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  395.178681]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  395.179112] ata1.00: status: { DRDY }
> > > [  395.180504] blk_update_request: I/O error, dev sda, sector 0
> > > [  395.180710] Buffer I/O error on dev sda, logical block 0, async page read
> > > [  426.154784] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  426.155025] ata1.00: failed command: READ DMA
> > > [  426.155173] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  426.155173]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  426.155585] ata1.00: status: { DRDY }
> > > [  457.130476] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> > > [  457.130713] ata1.00: failed command: READ DMA
> > > [  457.130859] ata1.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
> > > [  457.130859]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x20 (host bus error)
> > > [  457.131276] ata1.00: status: { DRDY }
> > > [  485.233894] INFO: task swapper/0:1 blocked for more than 120 seconds.
> > > [  485.234188]       Not tainted 4.4.0-31-powerpc-smp #50-Ubuntu
> > > [  485.234347] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > [  485.234787] INFO: task kworker/0:1:30 blocked for more than 120 seconds.