Re: [OpenBIOS] Booting SunOS from OpenBIOS

[Mark Cave-Ayland]

On 28/03/13 13:52, Artyom Tarasenko wrote:
> > Can you put together a quick patch for obp_child() and obp_nextnode() so
> > that if CONFIG_DEBUG_OBP is enabled, they also output the package name in
> > the debug string as well as the phandle? Take a look at how obp_proplen uses
> > get-package-property in order to get hold of the "name" property from the
> > package.
> >
> > (Or in fact, for an even quicker hack, the (void) POP() in obp_proplen() is
> > dropping a pointer to a string itself. So if you display that instead then
> > for your output above you should see the package name displayed)
>
> Ok. Did the later, and now it looks even stranger:
>
> obp_proplen(0xffd35ba8, name) = 6  (iommu)
> obp_nextnode(0xffd35ba8) = 0xffd36360
> obp_proplen(0xffd36360, name) = 5  (obio)
> obp_nextnode(0xffd36360) = 0xffd39724
> obp_proplen(0xffd39724, name) = 12  (FMI,MB86904)
> obp_nextnode(0xffd39724) = 0x0
> Unhandled Exception 0x00000007
>
> But:
> 0>  show-devs
> ffd2e31c /
> [...]
> ffd35ba8 /iommu
> [...]
> ffd36360 /obio (hierarchical)
> [...]
> ffd3972c /FMI,MB86904 (cpu)
>
> Why does obp_nextnode(0xffd36360) return 0xffd39724 ? According to
> show-devs it must be 0xffd3972c !

Yeah... that doesn't like quite right at all :/

obp_nextnode() is actually very simple in that it just calls the Forth 
"peer" word. Do you see the same phandles if you cycle through the 
device tree using "peer" directly from the OpenBIOS prompt?

0 peer
dup u. peer
dup u. peer
dup u. peer
..etc..

ATB,

Mark.

Booting SunOS from OpenBIOS

[Artyom Tarasenko]

On Thu, Mar 28, 2013 at 3:23 PM, Mark Cave-Ayland
 wrote:
> obp_nextnode() is actually very simple in that it just calls the Forth
> "peer" word. Do you see the same phandles if you cycle through the device
> tree using "peer" directly from the OpenBIOS prompt?
>
> 0 peer
> dup u. peer

0 > 0 peer dup u. ffd2e31c  ok
1 > peer u. 0  ok

I guess '/' has no peers, one would have to descend.

Otherwise it looks sane:

0 > ffd2e438  ok
1 > peer dup u. ffd2e4dc  ok
1 > peer dup u. ffd2e684  ok
1 > peer dup u. ffd2e6fc  ok
1 > peer dup u. ffd2e7e0  ok
1 > peer dup u. ffd34050  ok
1 > peer dup u. ffd35a58  ok
1 > peer dup u. ffd35afc  ok
1 > peer dup u. ffd35ba8  ok
1 > peer dup u. ffd36360  ok
1 > peer dup u. ffd3972c  ok
1 > peer dup u. 0  ok

ffd3972c - is the same value as in the show-devs output.

Artyom

linux/sparc and solaris/sparc under qemu blog:
http://tyom.blogspot.com/search/label/qemu