static config for CPUs with K8 example

[Stefan Reinauer]

* ron minnich <rminnich at lanl.gov> [030731 00:44]:
> 
> OK, I am hoping this is the kind of thing that will work for the K8. 
> 
> First, in cpu/k8, define a file, chip.h:
> 
> struct cpu_k8_config {
>         struct chip *north, *south, *east, *west;
> };

I don't think we need both of east and west really. The Bios Developers
Guide calls these links "UP", "DOWN" and "ACROSS", for LDT0-2. 
It might still be interesting to have a topological view on the
hardware, but at least for hypertransport setup, east and west is equal.

> In the mainboard config (mainboard/arima/hdama/Config.lb), you set things 
> up as follows:
> 
> southbridge amd/amd8111 "amd8111"
    register "north"     = "cpu0" 
    register "ht_width"  = "8"      # 8bit, even if device reports more
    register "ht_speed"  = "200"    # don't drive faster than 200MHz,
                                    # in case device reports false
                                    # maximum speed
> end
> southbridge amd/amd8131 "amd8131"
    register "north" = "cpu1" (for example)
    register "ht_width"  = "8"
    register "ht_speed"  = "200"
> end
 
> # pull in all includes, etc. for  the k8. 
> # should we have a 'noise keyword' for this, e.g. 'cputype k8'?
 
noise keyword?

> dir /cpu/k8  
  ^^^^^^^^^^^ 

can this not implicitly be generated from the below description? 
 
> # define the CPUs, their names, and their connections.
> cpu k8 "cpu0"
>   register "north" = "amd8111"
              ^^^^^ south (iirc)
>   register "east"  = "cpu1"
> end
> 
> cpu k8 "cpu1"
>   register "north" = "amd8131"
              ^^^^^ south
>   register "west"  = "cpu0"
> end
 

Stefan