[OpenBIOS] b?branch

[Programmingkid]

> On Dec 31, 2017, at 7:59 AM, Jd Lyons <lyons_dj at yahoo.com> wrote:
> 
> 
> 
>> On Dec 30, 2017, at 6:04 AM, Segher Boessenkool <segher at kernel.crashing.org> wrote:
>> 
>> On Sat, Dec 30, 2017 at 05:44:10AM -0500, Jd Lyons wrote:
>>>> On Dec 30, 2017, at 4:21 AM, Segher Boessenkool <segher at kernel.crashing.org> wrote:
>>>> On Fri, Dec 29, 2017 at 08:27:54PM -0500, Tarl Neustaedter wrote:
>>>>> [re-send, copying the list. For whatever reason, it seems messages
>>>>> aren't getting the reply-to: header.]
>>>>> 
>>>>> On 2017-Dec-29 03:58 , Jd Lyons wrote:
>>>>>> 0 > " /pci/@e" open-dev to my-self  ok
>>>>>> 0 > my-self . 5fc5ac34  ok
>>>>>> 0 > my-parent . 5fc5abfc  ok
>>>>>> 0 > my-space . 0  ok <<---Seems my-space isn't returning a correct value?
>>>>>> 0 > 
>>>>>> 
>>>>> That's the problem. It appears that simply open-dev and assigning
>>>>> my-self isn't enough. my-space (and my-address and my-unit) aren't
>>>>> getting set up, so all config-space accesses are going to do the wrong
>>>>> thing (they'll go to device 0, which may or may not be the root).
>>>>> 
>>>>> In the Sun/Oracle version, select would properly set things up, it
>>>>> appears no equivalent is available under openbios.
>>>>> 
>>>>> I think you'll have to further debug this by getting the FCode to be
>>>>> pulled in at startup in place of the built-in vga fcode, rather than
>>>>> trying to fiddle things this way.
>>>> 
>>>> Or set my-space to return 7000 and keep on fumbling :-)
>>> 
>>> How would I set my-space to 7000?
>>> 
>>> Is that specific to pci/@e?
>>> 
>>> I noticed in SLOF that my-space . returned 1800, however the card was pci/@3.
>> 
>> And that is correct :-)
>> 
>> It is @dev,fn or if fn is 0, it is written as @dev .  In the encoded
>> representation, it is  800*dev + 100*fn (dev is 5 bits, fn is 3 bits).
>> 
>> In openbios, it looks like my-space gets its data from >dn.probe-addr in
>> the device node...  And it is set via set-args...  And then I got lost,
>> not sure how that is supposed to be called.
>> 
> Looks like we need to change the way openbios handles my-space.
> 
> SLOF deals with it in the nodes.fs
> 
> : (my-phandle)  ( -- phandle )
>    my-self ?dup IF
>       ihandle>phandle
>    ELSE
>       get-node dup 0= ABORT" no active node"
>    THEN
> ;
> 
> : my-space ( -- phys.hi )
>    (my-phandle) >space
> ;
> 
> 
> I think we also need the >space word, the phandle word, and the ihandle word, I’ll have to track that  down too.
> 
> John, do you want to take a crack at fixing the >dn.probe-addr, or replacing it with something that returns a correct my-space .?

I'm not familiar with what >dn.probe-addr is but I did find this code:


 struct ( device node )
  /n field >dn.isize                    \ instance size (must go first)
  /n field >dn.parent
  /n field >dn.child
  /n field >dn.peer
  /n field >dn.properties
  /n field >dn.methods
  /n field >dn.priv-methods
  /n field >dn.#acells
  /n field >dn.probe-addr
  inst-node.size field >dn.itemplate
constant dev-node.size

I'm guessing it is a field in a structure. This code is found here: openbios/forth/device/structures.fs