Hello !
> > In "tlb_init" function, cp0 WIRED register is set
> to
> > zero, therefore the call to "local_flush_tlb_all"
> > flush all TLB entries which were mapping my kernel
> > in the 3 first entries. Why is this necessary ?
>
> Setting WIRED to zero is just part of kernel
> start-up initialization.
>
> In 2.4 it is done before board setup routine, which
> allows board
> to setup certain wired mapping.
>
> In 2.6 it is done after board setup routine. You
> are screwed. :) I think
> this needs to be fixed. A couple of boards should
> be broken because of this.
>
Well, you can again setup the wired tlb entries later.
For example, in case of Ocelot3 board (setup.c code),
the wired tlb entries are again created in the
time_init function.
void momenco_time_init(void)
{
setup_wired_tlb_entries();
....
And it is set for the first time in the board setup
function:
static int __init momenco_ocelot_3_setup(void)
{
unsigned int tmpword;
board_time_init = momenco_time_init;
_machine_restart = momenco_ocelot_restart;
_machine_halt = momenco_ocelot_halt;
_machine_power_off = momenco_ocelot_power_off;
/* Wired TLB entries */
setup_wired_tlb_entries();
....
Maybe you can do the same for this board as well
Thanks
Manish Lachwani
=====
http://www.koffee-break.com
