Re: OpenMPIC controller emulation in qemu ?

[Andrew Randrianasulu]

On Sun, May 19, 2024 at 8:40 PM BALATON Zoltan <balaton@eik.bme.hu> wrote:
>
> On Sun, 19 May 2024, BALATON Zoltan wrote:
> > Find a distro that's known to work on real PowerMac3,3 with two CPUs. Debian
> > should also work as long as it's a version that you can confirm somewhere
> > that it booted on real machine. There may be Adelie as well which should
> > still support PPC but I don't know if it works on Macs or on QEMU. If you
>
> Adelie should support at least PowerMac3,4 which is probably sufficiently
> close according to:
> https://help.adelielinux.org/html/hcl/fullsys.html#idm43559808
> and adelie-live-xfce-ppc-1.0-beta5-20240426.iso seems to boot with
> QEMU mac99,via=pmu so maybe try that (although is does not explicitly says
> it runs on Dual G4 Mac).

with new "unimplemented devices in macio" patch from Zoltan  Adelie
kernel boots like this:

/dev/shm/qemu-9.0.0/build/qemu-system-ppc -m 256  -M mac99,via=pmu
-smp 2  -kernel /mnt/tmp/boot/vmlinux  -vga none -device ati-vga
-bios /dev/shm/openbios-qemu.elf -d unimp -nographic

Quiescing Open Firmware ...
>> of_client_interface: quiesce
>> of_client_interface return:
Booting Linux via __start() @ 0x01000000 ...
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x52000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x08000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
Hello World !
[    0.000000] Total memory = 256MB; using 512kB for hash table
[    0.000000] Activating Kernel Userspace Execution Prevention
[    0.000000] Activating Kernel Userspace Access Protection
[    0.000000] Linux version 5.13.12_1 (voidlinux@voidlinux) (gcc
(GCC) 10.2.1 20201203, GNU ld (GNU Binutils) 2.35.1) #1 SMP Thu Aug 19
14:12:26 UTC 2021
[    0.000000] ioremap() called early from
pmac_feature_init+0xd4/0xad4. Use early_ioremap() instead
[    0.000000] Found UniNorth memory controller & host bridge @
0xf8000000 revision: 0x07
[    0.000000] Mapped at 0xf73c0000
[    0.000000] ioremap() called early from
probe_one_macio+0x17c/0x2b4. Use early_ioremap() instead
[    0.000000] Found a Keylargo mac-io controller, rev: 0, mapped at 0x(ptrval)
[    0.000000] PowerMac motherboard: PowerMac G4 AGP Graphics
[    0.000000] ioremap() called early from udbg_scc_init+0x1e4/0x3f8.
Use early_ioremap() instead
[    0.000000] boot stdout isn't a display !
[    0.000000] Using PowerMac machine description
[    0.000000] printk: bootconsole [udbg0] enabled
[    0.000000] CPU maps initialized for 1 thread per core
[    0.000000] -----------------------------------------------------
[    0.000000] phys_mem_size     = 0x10000000
[    0.000000] dcache_bsize      = 0x20
[    0.000000] icache_bsize      = 0x20
[    0.000000] cpu_features      = 0x000000000501a00a
[    0.000000]   possible        = 0x00000000277de14a
[    0.000000]   always          = 0x0000000001000000
[    0.000000] cpu_user_features = 0x9c000001 0x00000000
[    0.000000] mmu_features      = 0x00000001
[    0.000000] Hash_size         = 0x80000
[    0.000000] Hash_mask         = 0x1fff
[    0.000000] -----------------------------------------------------
[    0.000000] ioremap() called early from
pmac_setup_arch+0x118/0x290. Use early_ioremap() instead
[    0.000000] ioremap() called early from find_via_pmu+0x224/0x548.
Use early_ioremap() instead
[    0.000000] ioremap() called early from find_via_pmu+0x250/0x548.
Use early_ioremap() instead
[    0.000000] via-pmu: Server Mode is disabled
[    0.000000] PMU driver v2 initialized for Core99, firmware: 01
[    0.000000] ioremap() called early from
pmac_nvram_init+0x150/0x53c. Use early_ioremap() instead
[    0.000000] nvram: Checking bank 0...
[    0.000000] Invalid signature
[    0.000000] Invalid checksum
[    0.000000] nvram: gen0=0, gen1=0
[    0.000000] nvram: Active bank is: 0
[    0.000000] nvram: OF partition at 0xffffffff
[    0.000000] nvram: XP partition at 0xffffffff
[    0.000000] nvram: NR partition at 0xffffffff
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000]   Normal   empty
[    0.000000]   HighMem  empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000] percpu: Embedded 22 pages/cpu s59884 r8192 d22036 u90112
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 64960
[    0.000000] Kernel command line:
[    0.000000] Dentry cache hash table entries: 32768 (order: 5,
131072 bytes, linear)
[    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536
bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:on, heap free:off
[    0.000000] Kernel virtual memory layout:
[    0.000000]   * 0xf7bdf000..0xfffff000  : fixmap
[    0.000000]   * 0xf7400000..0xf7800000  : highmem PTEs
[    0.000000]   * 0xf7337000..0xf7400000  : early ioremap
[    0.000000]   * 0xd1000000..0xf7337000  : vmalloc & ioremap
[    0.000000] Memory: 242044K/262144K available (10912K kernel code,
1444K rwdata, 2512K rodata, 1420K init, 516K bss, 20100K reserved, 0K
cma-reserved, 0K highmem)
[    0.000000] random: get_random_u32 called from
__kmem_cache_create+0x38/0x57c with crng_init=0
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] ftrace: allocating 29527 entries in 87 pages
[    0.000000] ftrace: allocated 87 pages with 5 groups
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=2048 to nr_cpu_ids=2.
[    0.000000]  Trampoline variant of Tasks RCU enabled.
[    0.000000]  Rude variant of Tasks RCU enabled.
[    0.000000]  Tracing variant of Tasks RCU enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay
is 25 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[    0.000000] mpic: Setting up MPIC " MPIC 1   " version 1.2 at
80040000, max 2 CPUs
[    0.000000] mpic: ISU size: 64, shift: 6, mask: 3f
[    0.000000] mpic: Initializing for 64 sources
[    0.000000] GMT Delta read from XPRAM: 0 minutes, DST: on
[    0.001361] clocksource: timebase: mask: 0xffffffffffffffff
max_cycles: 0x5c40939b5, max_idle_ns: 440795202646 ns
[    0.003105] clocksource: timebase mult[28000000] shift[24] registered
[    0.026558] Console: colour dummy device 80x25
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x52000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x08000000)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device read  (size 4, offset 0x00038)
macio-unimp: unimplemented device write (size 4, offset 0x00038, value
0x00000000)
[    0.065057] printk: console [ttyPZ0] enabled
[    0.065057] printk: console [ttyPZ0] enabled
[    0.067168] printk: bootconsole [udbg0] disabled
[    0.067168] printk: bootconsole [udbg0] disabled
[    0.070739] pid_max: default: 32768 minimum: 301
[    0.074044] LSM: Security Framework initializing
[    0.077374] Yama: becoming mindful.
[    0.085612] AppArmor: AppArmor initialized
[    0.087394] Mount-cache hash table entries: 1024 (order: 0, 4096
bytes, linear)
[    0.088569] Mountpoint-cache hash table entries: 1024 (order: 0,
4096 bytes, linear)
smp_core99_probe
[    0.164164] PowerMac SMP probe found 2 cpus
[    0.166986] PMU i2c /pci@f2000000/mac-io@c/via-pmu@16000
[    0.168565]  channel 1 bus <multibus>
[    0.169182]  channel 2 bus <multibus>
[    0.170633] Processor timebase sync using GPIO 0x73
[    0.171554] mpic: requesting IPIs...
[    0.175853] CPU0: L2CR is 0
[    0.194444] rcu: Hierarchical SRCU implementation.
[    0.219538] smp: Bringing up secondary CPUs ...
smp_core99_kick_cpu
smp_core99_kick_cpu done
[    5.373624] Processor 1 is stuck.
[    5.392563] smp: Brought up 1 node, 1 CPU
[    5.430124] devtmpfs: initialized
[    5.460276] Found UniNorth PCI host bridge at 0x00000000f2000000.
Firmware bus number: 0->0
[    5.461767] PCI host bridge /pci@f2000000 (primary) ranges:
[    5.464340]   IO 0x00000000f2000000..0x00000000f27fffff -> 0x0000000000000000
[    5.466264]  MEM 0x0000000080000000..0x000000008fffffff -> 0x0000000080000000
[    5.470858] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 7645041785100000 ns
[    5.473072] futex hash table entries: 512 (order: 2, 16384 bytes, linear)
[    5.524477] NET: Registered protocol family 16
[    5.534404] audit: initializing netlink subsys (disabled)
[    5.543490] audit: type=2000 audit(1716205301.364:1):
state=initialized audit_enabled=0 res=1
[    5.552652] thermal_sys: Registered thermal governor 'fair_share'

[    5.552887] thermal_sys: Registered thermal governor 'step_wise'
[    5.566417] PCI: Probing PCI hardware
[    5.579140] PCI host bridge to bus 0000:00
[    5.580379] pci_bus 0000:00: root bus resource [io  0x0000-0x7fffff]
[    5.581917] pci_bus 0000:00: root bus resource [mem 0x80000000-0x8fffffff]
[    5.583069] pci_bus 0000:00: root bus resource [bus 00-ff]
[    5.584320] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to ff
[    5.589813] pci 0000:00:0b.0: [106b:001f] type 00 class 0x060000
[    5.600103] pci 0000:00:0c.0: [106b:0022] type 00 class 0xff0000
[    5.602310] pci 0000:00:0c.0: reg 0x10: [mem 0x80000000-0x8007ffff]
[    5.608979] pci 0000:00:0d.0: [106b:003f] type 00 class 0x0c0310
[    5.610692] pci 0000:00:0d.0: reg 0x10: [mem 0x80080000-0x800800ff]
[    5.617915] pci 0000:00:0e.0: [106b:0021] type 00 class 0x020000
[    5.619309] pci 0000:00:0e.0: reg 0x10: [mem 0x80200000-0x803fffff]
[    5.625641] pci 0000:00:0f.0: [1002:5046] type 00 class 0x030000
[    5.628360] pci 0000:00:0f.0: reg 0x10: [mem 0x81000000-0x81ffffff pref]
[    5.631239] pci 0000:00:0f.0: reg 0x14: [io  0x1000-0x10ff]
[    5.635152] pci 0000:00:0f.0: reg 0x18: [mem 0x82000000-0x82003fff]
[    5.646534] pci 0000:00:0f.0: reg 0x30: [mem 0x82010000-0x8201ffff pref]
[    5.650177] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    5.660460] pci_bus 0000:00: resource 4 [io  0x0000-0x7fffff]
[    5.661013] pci_bus 0000:00: resource 5 [mem 0x80000000-0x8fffffff]
[    5.689713] Kprobes globally optimized
[   10.559365] iommu: Default domain type: Translated
[   10.568184] pci 0000:00:0f.0: vgaarb: setting as boot VGA device
[   10.571467] pci 0000:00:0f.0: vgaarb: VGA device added:
decodes=io+mem,owns=io+mem,locks=none
[   10.573483] pci 0000:00:0f.0: vgaarb: bridge control possible
[   10.574406] vgaarb: loaded
[   10.578851] SCSI subsystem initialized
[   10.608547] clocksource: Switched to clocksource timebase
[   10.863544] VFS: Disk quotas dquot_6.6.0
[   10.864625] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[   10.873752] AppArmor: AppArmor Filesystem Enabled
[   10.913812] NET: Registered protocol family 2
[   10.917044] IP idents hash table entries: 4096 (order: 3, 32768
bytes, linear)
[   10.940708] tcp_listen_portaddr_hash hash table entries: 512
(order: 0, 6144 bytes, linear)
[   10.941942] TCP established hash table entries: 2048 (order: 1,
8192 bytes, linear)
[   10.943198] TCP bind hash table entries: 2048 (order: 2, 16384 bytes, linear)
[   10.944457] TCP: Hash tables configured (established 2048 bind 2048)
[   10.949724] MPTCP token hash table entries: 256 (order: 0, 4096
bytes, linear)
[   10.951149] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[   10.952542] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[   10.958736] NET: Registered protocol family 1
[   10.960910] NET: Registered protocol family 44
[   10.966195] PCI: CLS 0 bytes, default 32
[   10.974762] Thermal assist unit using workqueue, shrink_timer: 2000 ms
[   10.993974] Initialise system trusted keyrings
[   10.999125] workingset: timestamp_bits=14 max_order=16 bucket_order=2
[   11.023401] zbud: loaded
[   11.031343] Key type asymmetric registered
[   11.032239] Asymmetric key parser 'x509' registered
[   11.033355] Block layer SCSI generic (bsg) driver version 0.4
loaded (major 250)
[   11.035535] io scheduler mq-deadline registered
[   11.036454] io scheduler kyber registered
[   11.037611] io scheduler bfq registered
[   11.048623] aty128fb: Found Intel x86 BIOS ROM Image
[   11.049475] aty128fb: Rage128 BIOS located
[   11.052270] aty128fb: Rage128 PF PRO AGP [chip rev 0x0]
[   11.052351] 16M 128-bit SDR SGRAM (1:1)
[   11.086791] Console: switching to colour frame buffer device 128x48
[   11.094516] fb0: ATY Rage128 frame buffer device on Rage128 PF PRO AGP
[   11.103530] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[   11.117074] pmac_zilog: 0.6 (Benjamin Herrenschmidt
<benh@kernel.crashing.org>)
[   11.118439] Serial: MPC52xx PSC UART driver
[   11.120166] Non-volatile memory driver v1.3
[   11.120822] Linux agpgart interface v0.103
[   11.125943] MacIO PCI driver attached to Keylargo chipset
[   11.136193] 0.00013020:ch-a: ttyPZ0 at MMIO 0x80013020 (irq = 37,
base_baud = 230400) is a Z85c30 ESCC - Serial port
[   11.141032] 0.00013000:ch-b: ttyPZ1 at MMIO 0x80013000 (irq = 36,
base_baud = 230400) is a Z85c30 ESCC - Serial port
[   11.156779] mousedev: PS/2 mouse device common for all mice
[   11.162119] rtc-generic rtc-generic: registered as rtc0
[   11.164272] rtc-generic rtc-generic: setting system clock to
2024-05-20T11:41:46 UTC (1716205306)
[   11.170033] PowerMac i2c bus pmu 2 registered
[   11.171226] PowerMac i2c bus pmu 1 registered
[   11.173723] ledtrig-cpu: registered to indicate activity on CPUs
[   11.176020] drop_monitor: Initializing network drop monitor service
[   11.180845] NET: Registered protocol family 10
[   11.256567] Segment Routing with IPv6
[   11.257251] RPL Segment Routing with IPv6
[   11.258898] mip6: Mobile IPv6
[   11.260636] NET: Registered protocol family 17
[   11.262237] mpls_gso: MPLS GSO support
[   11.262900] drmem: No dynamic reconfiguration memory found
[   11.268458] registered taskstats version 1
[   11.269177] Loading compiled-in X.509 certificates
[   11.275193] zswap: loaded using pool lzo/zbud
[   11.278499] Key type ._fscrypt registered
[   11.278985] Key type .fscrypt registered
[   11.279399] Key type fscrypt-provisioning registered
[   11.286297] AppArmor: AppArmor sha1 policy hashing enabled
[   11.295416] input: PMU as /devices/virtual/input/input0
[   11.318242] List of all partitions:
[   11.318973] No filesystem could mount root, tried:
[   11.319026]
[   11.320119] Kernel panic - not syncing: VFS: Unable to mount root
fs on unknown-block(8,1)
[   11.321278] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.13.12_1 #1
[   11.322454] Call Trace:
[   11.322913] [d1025db0] [c05ee5dc] dump_stack+0x9c/0xd0 (unreliable)
[   11.323860] [d1025dd0] [c008e354] panic+0x154/0x364
[   11.324378] [d1025e30] [c0d20958] mount_block_root+0x330/0x384
[   11.324949] [d1025eb0] [c0d20ba8] prepare_namespace+0x170/0x1b4
[   11.325519] [d1025ed0] [c0d20344] kernel_init_freeable+0x238/0x26c
[   11.326121] [d1025f10] [c0007c28] kernel_init+0x20/0x120
[   11.326649] [d1025f30] [c00220fc] ret_from_kernel_thread+0x14/0x1c
[   11.329832] ---[ end Kernel panic - not syncing: VFS: Unable to
mount root fs on unknown-block(8,1) ]--


>
> Regards,
> BALATON Zoltan