[parisc-linux] Re: Boot problem with HPPA 735/125 w/ A1439A CRX

[Helge Deller]

Hi Kurt,

On Wednesday 25 July 2007, kurtm22 at netscape.net wrote:
> I did what you suggested and built a new kernel from scratch using the 2.6.22
> source tar.? I did not comment out the fb_memset() call in stifb.c
> prior to the build so I could post the crash results - perhaps
> it will provide more insight to what is going on:
> 
> sticon: Initializing sti text console
> Console: switching to colour STI console 160x64
> Backtrace:
> ??? [<1044e1b0>] stifb_init_fb+0x67c/0x928
> ??? [<1044e4c4>] stifb_init+0x68/0xf8
> ??? ? [<1043d4187>] kernel_init+0xfc/0x2c8
> ??? [<10109c5c>] ret_from_kernel_thread+0x1c/0x24
> 
> kernel fault:? code=15? regs=10984200? (addr=f9000000)
> 
> I can post more of the dump if you need it.? I left the machine 
> sitting there as i am writing down what I see on the screen.

code 15 means "Data TLB miss fault/Data page fault", so in fact it writes to memory it shouldn't, or in a way it shouldn't.
I still suspect the fb_memset() call.
Nevertheless, without more info, esp. where in the C-file/stifb_init_fb() function is 0x67c I can't do more.
Please read http://parisc-linux.org/faq/kernelbug-howto.html, esp. the section "More advanced bug reports".
It describes how to find the problematic code lines.
Alternatively, just comment out the fb_memset() call and try again.

Helge