Gentoo Archives: gentoo-embedded

From: Peter Stuge <peter@×××××.se>
To: gentoo-embedded@l.g.o
Subject: Re: [gentoo-embedded] Re: boot linux without a bios on intel platform
Date: Fri, 24 Dec 2010 09:05:06
Message-Id: 20101224081654.13380.qmail@stuge.se
In Reply to: Re: [gentoo-embedded] Re: boot linux without a bios on intel platform by Kfir Lavi
1 Kfir Lavi wrote:
2 > Thanks for your lengthy replay. Very interesting talk.
3
4 I'm glad you liked it!
5
6
7 > I loved the push pins idea.
8
9 Hehe, yes, it's really handy. :)
10
11
12 > Now I'm asking myself, how I didn't thought about it myself. I used
13 > a paper clip, but it is awkward.
14
15 Yep. I like the pushpin idea a lot but I actually continue to use a
16 small screwdriver myself.
17
18
19 > I have a kontron board with an intel cpu. How can I get the spec
20 > with the parts in order to check if I will be able to use coreboot?
21 > Attached is the lspci of the board.
22 > 00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
23
24 lspci is a good first bit of info! This chipset is not supported at
25 all. The only modern-ish Intel chipset that is supported is the i945.
26 Compare the other Kontron with Intel in the list of supported boards.
27
28
29 > I would also like to know (if it is possible) how hard is to create
30 > support for this board myself.
31
32 For an experienced coreboot developer I would estimate an absolute
33 minimum of eight man-months of work. This assumes that Intel NDAs and
34 document retrieval requests are processed instantly. It took 9 months
35 just to get NDAs processed for the coreboot developer who went
36 through that process. On the other hand, one Intel FAE I talked to
37 mentioned only weeks needed in some of his projects.
38
39 You will also benefit from test equipment that will allow you to
40 study DRAM signals, and CPU state. These are 100k pricetag items.
41
42 Learning how to initialize CPU, northbridge and memory controller
43 takes significant effort, and FAEs usually can not help.
44
45 Is this Mobile 4 Series chipset (whatever that means, you could try
46 to look for some more low-level product codes for the chipset) part
47 of Intel's Embedded division? If so, you may be able to find much
48 inforation at edc.intel.com, but only after going through some
49 approval process there.
50
51 It can certainly be worthwhile to do the coreboot work also for
52 something completely unsupported like this, but you need a fairly
53 large series production.
54
55 On the other hand, maybe you can just choose a different board that
56 is already supported. I would try hard to do just that.
57
58
59 //Peter

Replies

Subject Author
Re: [gentoo-embedded] Re: boot linux without a bios on intel platform Kfir Lavi <lavi.kfir@×××××.com>