[LinuxBIOS] Clarification of Raminit.c

[roger]

I'm kind of confused on this one...

How would I specify a DRAMC or CAS setting (after referring to the 440BX
intel spec pdf)?

For example:


--- Snip from Intel pdf ---
NBXCFG—NBX Configuration Register (Device 0)
Offset: 50–53h
Default: bits 31–16: 0000h
bits 15–0: 00S0-0000-000S-0S00b
Access: Read/
Size: 32 bits
...snip...
Bit
13:12  00 = 100 MHz, 11 = Reserved
--- End Snip from Intel pdf ---


Again, just using this as an example as values should be provided by SPD
values.  In i440bx/raminit.c, we set this with the following values:

NBXCFG, 0x00000000, 0xff00a00c,

I'm guessing the "0x00000000" & "0xff00a00c" values are calculated by
somehow adding all the settings possible for NBX and somehow, the value
is uniquely recognized by the Northbridge??


--
Roger
http://www.eskimo.com/~roger/index.html
Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61

Sun May 13 01:39:19 PDT 2007