** Sorry, the previous email was sent too soon **
As the subject says, I'm having trouble booting linux (both DENX and
Hard Hat) on our EST8260 board. The symptoms sound a lot like a problem
which has been discussed on this list before, but I believe my problem
is different. Let me explain:
I am using u-boot 0.2.0 as my boot loader. I have verified that the
bd_t structure passed to Linux by u-boot is the same structure that is
expected by Linux. All the frequency values in the bd_t structure have
been normalized to MHz. I have verified that the immr address set up by
u-boot is the address that Linux expects.
I have verified that I run through initialization into start_kernel in
main.c. Further, I have verified that I make it through the call to
init_IRQ. What appears to happen is that after the routine
m8260_init_IRQ is called, I will start getting timer_interrupts. It
appears that any forward progress of initialization stops at this point.
Anytime I check, it seems I am running in the timer interrupt code. I
have tried
everything I can think of with the frequencies specified in the bd_t
structure. Just to be clear, they are passed in by u-boot as MHz
values. The following are passed in:
intfreq = 132000000
busfreq = 33000000
cpmfreq 66000000
brgfreq 33000000
sccfreq 33000000
vco 132000000
What's odd is that the timer interrupt is happening before any call to
time_init. In addition, it appears to be non-maskable. I have disabled
the MSR EE bit, and the interrupt controller mask registers are all 0 yet
I seem to get stuck in the timer interrupt.
Does anyone have any clue?
Thanks
Rich
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