On Mon, 23 May 2016, David Griffith wrote:
I'm experimenting with a Thinkpad T60p, specifically getting something
working that includes PXE and secondary payloads. Apparently the default
CBFS size of 0x40000 is too small because the build process complains it
can't add ipxe.rom and guesses that there's no room. Just now I tried
specifying a size of 0x200000, thinking that would work because I have a two
megabyte SPI flash chip. I went through the procedures on
https://www.coreboot.org/Board:lenovo/t60 and
https://www.coreboot.org/Board:lenovo/x60/Installation which led to a T60p
that shows a black screen and is non-responsive. So, I guess that was a
wrong value.
So, what's a safe value for the CBFS size that will allow me to add PXE and
some other secondary payloads?
I think my problem wasn't really with the CBFS size, but some apparently
incorrect advice I got from the IRC channel. I was told that if I clip
the SPI flash chip to a Beaglebone Black and flash that way then I don't
need to do these commands prior to flashing (see
https://www.coreboot.org/Board:lenovo/x60/Installation):
dd if=coreboot.rom of=top64k.bin bs=1 skip=$[$(stat -c %s coreboot.rom) -
0x10000] count=64k
dd if=top64k.bin of=coreboot.rom bs=1 seek=$[$(stat -c %s coreboot.rom) -
0x20000] count=64k conv=notrunc
After trying various sizes of CBFS, pulling the nvram battery, and trying
the dd switcheroo on a lark, I discovered that I /do/ need to do the
switcheroo.
I tried and failed to flash the SPI chip from the T60p itself, first
setting BUCTS to 1. After I pulled the nvram battery, BUCTS reported as
being 0.
--
David Griffith
d...@661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
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