Hello,
I've been trying to bring coreboot up on an EP80579 reference platform
(not Truxton) and I have thus far been thwarted.
I'm using svn revision 5442 and the boot hangs with just the welcome to
coreboot line:
coreboot-4.0-r5422M Tue Apr 13 18:13:08 PDT 2010 starting...
I've put several print_info statements in romstage.c and narrowed it
down to the following line in i3100_early_lpc.c:
pci_write_config32(dev, 0x44, pci_read_config32(dev, 0x44) | (1 << 7));
Further debug shows that in general I can not read a value and then use
the value. If I just perfrom a read operation it executes the
instruction and contiues. But if I do a read and try to use a
print_info_hexXX function it just hangs.
I'm really at a loss where to go from here for debugging. I don't have
a JTAG TAP that I can step through code to identify the assembly code
I'm getting stuck on. I've tried the Truxton BIOS in my reference board
and this works fine. I can also get the boot farther along if I remove
the pci_read_config32 commands (for example in the above line I just use
the default value for register 0x44 instead of reading it in).
I'm using gcc version 4.3.2 (Gentoo 4.3.2-r3 p1.6, pie-10.1.5)
Any ideas on what to try next? Is there a recommended toolchain?
Thanks in advance for any help!
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