Re: PCI range checking under qemu-system-sparc64

On Sun, Sep 06, 2015 at 03:22:59PM +0100, Mark Cave-Ayland wrote:
> On 06/09/15 14:42, Alexey Dokuchaev wrote:
> 
> > On Sun, Sep 06, 2015 at 02:02:01PM +0100, Mark Cave-Ayland wrote:
> >> I wonder if the problem is just that suitable console drivers can't
> >> be found?
> >>
> >>>   ebus0: <su> addr 0x14000003f8-0x14000003ff irq 43 (no driver attached)
> >>>   ebus0: <kb_ps2> addr 0x1400000060-0x1400000067 (no driver attached)
> >>
> >> The QEMU hardware model is still a WIP and the serial port currently
> >> uses a 16550A UART (su) device rather than ESCC found in real hardware,
> >> while the keyboard is a simple PS2 keyboard.
> >>
> >> If you alter your kernel configuration to include building of the su and
> >> ps2 driver modules, does this help with detection of the serial and
> >> keyboard devices and if so, does boot progress any further at all?
> > 
> > Hmm, I'm running GENERIC, so it looks like everything should be already
> > there, no?  At least by looking at ./conf/files.sparc64 I don't see what
> > else ("device ???") should I add to it to get su/kb_ps2 support...
> 
> I'm afraid I'm not really a BSD person, but a quick browse at the source
> on github suggests you need these drivers:
> 
> https://github.com/freebsd/freebsd/blob/master/sys/dev/uart/uart_bus_ebus.c
> 
> https://github.com/freebsd/freebsd/blob/master/sys/dev/atkbdc/atkbdc_ebus.c
> 
> It also looks like you'd need to hack atkbdc_ebus.c to allow "kb_ps2" as
> a device name rather than just trying to match on "8042", although this
> could potentially be fixed by renaming the device in OpenBIOS moving
> forwards as long as it doesn't cause any regressions.
> 

Simple renaming in OpenBIOS wouldn't be the right fix either and neither
change would make things work.
On real machines for PS/2 there's a "8042" node on the EBus and _beneath_
that "8042" node there's a "kb_ps2" as well as a "kdmouse" one. "8042"
has _two_ _identical_ addresses assigned, which its children index via
their "reg" properties. The interrupt also goes onto the "8042" node.
See the example of a Sun AXe board below.

*Please* emulate real machines with QEMU. This specifically also applies
to ARM hardware.

Marius

      Node 0xf008cf88: ebus
        interrupt-map:
          00 00 00 14 00 38 03 f8 00 00 00 01 f0 08 a7 38 00 00 00 1c
          00 00 00 14 00 30 00 60 00 00 00 01 f0 08 a7 38 00 00 00 29
          00 00 00 14 00 30 00 60 00 00 00 02 f0 08 a7 38 00 00 00 2a
          00 00 00 14 00 36 02 f8 00 00 00 01 f0 08 a7 38 00 00 00 1d
          00 00 00 14 00 40 00 00 00 00 00 01 f0 08 a7 38 00 00 00 2b
          00 00 00 14 00 34 02 78 00 00 00 01 f0 08 a7 38 00 00 00 22
          00 00 00 14 00 72 40 00 00 00 00 01 f0 08 a7 38 00 00 00 25
          00 00 00 14 00 30 00 2e 00 00 00 01 f0 08 a7 38 00 00 00 04
          00 00 00 14 00 32 03 f0 00 00 00 01 f0 08 a7 38 00 00 00 27
          00 00 00 14 00 20 00 00 00 00 00 01 f0 08 a7 38 00 00 00 23
          00 00 00 14 00 20 00 00 00 00 00 02 f0 08 a7 38 00 00 00 24
          00 00 00 14 00 60 00 00 00 00 00 01 f0 08 a7 38 00 00 00 28
          00 00 00 14 00 60 00 00 00 00 00 02 f0 08 a7 38 00 00 00 1e
          00 00 00 14 00 60 00 00 00 00 00 03 f0 08 a7 38 00 00 00 1f
        interrupt-map-mask:
          00 00 00 1f 00 ff ff ff 00 00 00 03
        #interrupt-cells:
          00 00 00 01  
        ranges:
          00 00 00 10 00 00 00 00 82 01 08 10 00 00 00 00 f0 00 00 00
          01 00 00 00 00 00 00 14 00 00 00 00 82 01 08 14 00 00 00 00
          f1 00 00 00 00 80 00 00
        reg:
          00 01 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
          82 01 08 10 00 00 00 00 f0 00 00 00 00 00 00 00 01 00 00 00
          82 01 08 14 00 00 00 00 f1 00 00 00 00 00 00 00 00 80 00 00
        #size-cells:
          00 00 00 01
        #address-cells:
          00 00 00 02
        name:
          65 62 75 73 00
          'ebus'
        max-latency:
          00 00 00 19
        min-grant:
          00 00 00 0a 
        class-code:
          00 06 80 00  
        revision-id:
          00 00 00 01
        devsel-speed:
          00 00 00 01
        fast-back-to-back:
        device-id:
          00 00 10 00
        vendor-id:
          00 00 10 8e
<...>
        Node 0xf008fb5c: 8042
          interrupts:
            00 00 00 01 00 00 00 02
          #size-cells:
            00 00 00 00
          #address-cells:
            00 00 00 01
          reg:
            00 00 00 14 00 30 00 60 00 00 00 08 00 00 00 14 00 30 00 60
            00 00 00 08
          device_type:
            38 30 34 32 00
            '8042'
          name:
            38 30 34 32 00
            '8042'
          model:
            49 4e 54 43 2c 38 30 63 34 32 00
            'INTC,80c42'
          Node 0xf00909a4: kb_ps2
            reg:
              00 00 00 00
            language:
              65 6e 00
              'en' 
            compatible:
              70 6e 70 50 4e 50 2c 33 30 33 00
              'pnpPNP,303'
            port-b-ignore-cd:
            port-a-ignore-cd:
            keyboard:
            device_type:
              73 65 72 69 61 6c 00
              'serial'
            name:
              6b 62 5f 70 73 32 00
              'kb_ps2'
          Node 0xf009314c: kdmouse
            reg:
              00 00 00 01
            compatible:
              70 6e 70 50 4e 50 2c 66 30 33 00
              'pnpPNP,f03'
            port-b-ignore-cd:
            port-a-ignore-cd:
            mouse:
            device_type:
              73 65 72 69 61 6c 00
              'serial'
            name:
              6b 64 6d 6f 75 73 65 00
              'kdmouse'
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