[Qemu-devel] Re: OBP under qemu-system-sparc64

[Blue Swirl <blauwirbel@gmail.com>]

On 4/14/10, Artyom Tarasenko <atar4qemu@googlemail.com> wrote:
> 2010/4/14 Artyom Tarasenko <atar4qemu@googlemail.com>:
>
> > 2010/4/3 Blue Swirl <blauwirbel@gmail.com>:
>  >> could be interesting to see what OBP
>  >> from a real machine would think of the QEMU machine.
>  >
>  > it doesn't live long enough to think something (must be something trivial):
>  >
>  > $ sparc64-softmmu/qemu-system-sparc64 -bios u1_v3.11.1.bin -nographic
>  > -cpu 'TI UltraSparc I' -d in_asm,int,cpu
>  > --------------
>  > IN:
>  > 0x000001fff0000020:  ldxa  [ %g0 ] (69), %g2
>  > 0x000001fff0000024:  stxa  %g0, [ %g0 ] (69)
>  > 0x000001fff0000028:  b,a   0x1fff0001d88
>  >
>  > --------------
>  > IN:
>  > 0x000001fff0001d88:  rdpr  %cwp, %g1
>  > 0x000001fff0001d8c:  wrpr  0, %cwp
>  > 0x000001fff0001d90:  wrpr  %g1, 0, %cwp
>  > 0x000001fff0001d94:  call  0x1fff0000210
>  > 0x000001fff0001d98:  add  %g0, %g0, %o0
>  >
>  > --------------
>  > IN:
>  > 0x000001fff0000210:  mov  0x1ff, %o1    ! 0x1ff
>  > 0x000001fff0000214:  sllx  %o1, 0x20, %o1
>  > 0x000001fff0000218:  sethi  %hi(0xf1300000), %o2
>  > 0x000001fff000021c:  or  %o2, %o1, %o2
>  > 0x000001fff0000220:  stba  %o0, [ %o2 ] (21)
>
>
> and on the real machine there seems to be some device connected to this address:
>  ok 1fff1300000 bypass-asi spacel@ .
>  Data Access Error
>  ok cpu-afsr@ .
>  104000000
>  ok 1fff1300000 bypass-asi spacel@ .
>  Data Access Error
>  ok cpu-afar@ . cpu-afsr@ .
>  1fff1300000 104000000
>  But, with single bytes it works:
>  ok 1fff1300000 bypass-asi spacec@ .
>  64
>  ok 1fff1300001 bypass-asi spacec@ .
>  64
>  ok 1fff1300002 bypass-asi spacec@ .
>  64
>  ok 1fff1300003 bypass-asi spacec@ .
>  64
>
>  If I put pseudodevices there it still doesn't get too far:
>  #### skip unassigned mem access to 000001fff1300000
>  #### skip unassigned mem access to 000001fff1300004
>  #### skip unassigned mem access to 000001fff1300005
>  #### skip unassigned mem access to 000001fff1300006
>  #### skip unassigned mem access to 000001fff1300007

It's this device:
            model:  'SUNW,sc-up'
            reg:  0000000f.01300000.00000008
            name:  'sc'

>  #### skip unassigned mem access to 000001fff1900000

            address:  fffb6000
            reg:  0000000f.01900000.00000001
            name:  'auxio'

>  #### skip unassigned mem access to 000001fff1100004

            device_type:  'serial'
            reg:  0000000f.01100000.00000004
            name:  'zs'

>  #### skip unassigned mem access to 000001fff1100004
>  #### skip unassigned mem access to 000001fff1100000
>  #### skip unassigned mem access to 000001fff1300007
>  #### skip unassigned mem access to 000001fff1200001

            reg:  0000000f.01200000.00002000
            model:  'mk48t59'
            name:  'eeprom'

Zilog serial (escc) and m48t59 are already implemented.