[LinuxBIOS] Problems with Filo booting - HELP

[joe at smittys.pointclark.net]

> Corey, After scatching my head for days (hair thinning even more) I
> think you may be onto something. I have tried changing the values in
> APBASE before with no luck and I think this is why:
>
> 1. APSIZE Bits[5:3] need to be set first to 111 too allow APBASE
> Bits[27:25] to become R/W.
This register sets ok
>
> 2. Now we can set APBASE Bits[27:25] to 111 for 32MB Aperture.
Nope not able to write to this register. Why??
>
> 3. I noticed this in my bootlogs:
>
>      PCI: 00:00.0 register 10(00000008), read-only ignoring it
>
>      Which is the APBASE register. I think LB is tring to configure an
> address range for it but not able to because the address range is set
> to read only.
Boot log still says this:-(
>
> 4. Set register GCC0 Bit 9 to 1. This enables access to the Aperture
> allowing LB to configure an address range.
Not able to set this bit eithor.
>
> I wish there was a way to just disable the Aperture all togethor for
> now but the i82830 is not designed to run in headless mode (no
> graphics). I will try this out and report back.
>
I don't know where to go from here..

Thanks - Joe

Northbridge following SDRAM init:
PCI: 00:00.00
00: 86 80 75 35 06 00 10 00 04 00 00 06 00 00 00 00
10: 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 00
40: 09 00 05 01 00 00 00 00 00 00 00 00 02 28 00 0e
50: 72 A0 20 00 00 00 00 00 00 30 33 33 33 33 33 33
60: 00 00 04 04 00 00 00 00 00 00 00 00 00 00 00 00
70: ff f1 ff ff 00 00 00 00 10 00 00 00 70 02 00 20
80: 00 00 00 00 00 00 00 00 00 d0 00 40 00 00 00 00
90: 02 38 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 02 00 20 00 17 02 00 1f 00 00 00 00 00 00 00 00
b0: 00 00 00 00 38 00 00 00 00 00 00 00 00 00 00 00
c0: 00 54 0e 41 a2 99 01 00 c0 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 09 c9 9f fc
f0: 11 11 01 00 00 00 0b 05 34 d6 30 cf 22 cf 23 cf
Testing DRAM : 00100000-00200000
DRAM fill: 00100000-00200000
00100000
00110000
00120000
00130000
00140000
00150000
00160000
00170000
00180000
00190000
001a0000
001b0000
001c0000
001d0000
001e0000
001f0000
00200000
DRAM filled
DRAM verify: 00100000-00200000
00100000
Fail: @0x00100000 Read value=0xffffffff
..................
Fail: @0x00100400 Read value=0xffffffff
Aborting.

00100400
DRAM did _NOT_ verify!
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