[LinuxBIOS] Current Status of DFI P2XBL (440bx w/ w83977ew)

roger roger at eskimo.com
Thu May 10 01:18:43 CEST 2007


On Wed, 2007-05-09 at 19:58 +0200, Uwe Hermann wrote:
> On Wed, May 09, 2007 at 08:20:56AM -0700, roger wrote:
> > I get random hangs during sdram init.
> 
> Hm. My guess is that some RAM parameters don't match your system
> (66 MHz vs. 100 MHz system bus frequency, or such), or are just plain wrong.
> 
> Don't forget, the current code is hardcoded to the S1846 (which I'll fix
> soon, I hope).

FYI:  Attached is the current linuxbios boot log of the DFI P2XBL board
using asus/p2b profile.

Seems to be *consistently* hanging at RAM3 (during Northbridge prior to
SDRAM init). (Although yanking out 2 dimms gets me a step or two
further ... with failing errors.)

The board has 3 PC100 SDRAM 128MB modules with only 3 DIMM sockets for a
total of ~384MB.


(Dunno if the following dmesg of this motherboard will help.  I'll
probably be studying DRAM structure and a good 82443BX chip pdf
tonight.)



BIOS-provided physical RAM map:
sanitize start
sanitize end
copy_e820_map() start: 0000000000000000 size: 00000000000a0000 end:
00000000000a0000 type: 1
copy_e820_map() type is E820_RAM
copy_e820_map() start: 00000000000f0000 size: 0000000000010000 end:
0000000000100000 type: 2
copy_e820_map() start: 0000000000100000 size: 0000000017ef0000 end:
0000000017ff0000 type: 1
copy_e820_map() type is E820_RAM
copy_e820_map() start: 0000000017ff0000 size: 0000000000003000 end:
0000000017ff3000 type: 4
copy_e820_map() start: 0000000017ff3000 size: 000000000000d000 end:
0000000018000000 type: 3
copy_e820_map() start: 00000000ffff0000 size: 0000000000010000 end:
0000000100000000 type: 2
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 0000000017ff0000 (usable)
 BIOS-e820: 0000000017ff0000 - 0000000017ff3000 (ACPI NVS)
 BIOS-e820: 0000000017ff3000 - 0000000018000000 (ACPI data)
 BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
383MB LOWMEM available


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

Wed May 9 16:04:48 PDT 2007
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