> Essentially, you have 2 choices:
>
> 1. Turn off the MMU.
> 2. insert a 1:1 physical to virtual mapping for the ROM and call the code.
> (with interrupts disabled).
>
> Which one works depends on what the ROM code requires.
>
> There is an example of (1) in the current ARM kernel sources - the RiscPC
> port uses this method to reboot - we can't activate the hardware reset
line
> on these machines, so our only option is to use this method.
I tried both of these, and I must be doing something wrong. For (1), I
grabbed the code you mentioned from the RiscPC port (setup_mm_for_reboot()
and some code from the soft reset routine). After calling
setup_mm_for_reboot, if I call __ioremap(), the processor hangs. If I shut
down the MMU, I get the same results.
Where would be a good place to find an example of how to implement your
second suggestion?
thanks. sorry to keep bothering you. i'll also try asking on the arm
newsgroup...
-ian
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Oct 07 2001 - 21:00:40 EST