static config for CPUs with K8 example
Stefan Reinauer
stepan at suse.de
Thu Jul 31 05:17:01 CEST 2003
* 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
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