I have finally been able to get a copy of sgi cvs code:).Now I have
changed my p6032 code to use new[time,pci,irq] code and it seems a
lot cleaner.But still problems.
I keep seeing spurious interrupt when starting xwindows.And
sometimes without x. If the machine is doing heavy io(e.g.,unzip &
untar mozilla source) when I startx,it will probably enter an
endless loop of spurious interrupt or lead to unaligned instruction
access shortly after(with epc=0x1,ra=0x1) and die.
I have seen spurious IRQ1,IRQ7 and IRQ12,and the endless loop case
is IRQ12--ps2 mouse interrupt.
Can somebody give me a clue? What I know is that 8259 may generate
spurious IRQ7 & IRQ15. But how can the others happen,buggy hw?And
what may cause a kernel unaligned instruction access?
My hw is p6032 rev.B eval board with idtRC64474 cpu.
BTW,is that current code has no support for different PCI & CPU
address space?In p6032 default setting,PCI memory address 0 is
CPU physical address 0x10000000,and main memory is 0-0x10000000
for CPU,but 0x80000000-0x90000000 for pci. So I have to change
ioremap,virt_to_bus & bus_to_virt. I think this problem should
exist in many nonpc hw,could you point me a clean way?
Thanks in advance.