The BEV bit of Status is cleared by the macro setup_c0_status_pri which
is invoked in kernel_entry. See arch/mips/kernel/head.S. It's of course
possible that a bootloader will already have cleared it, but it should not
be necessary. grep is your friend. ;o)
Regards,
Kevin K.
Florian DELIZY wrote:
Subject : where to set the BEV to normal of status in kernel source?
i don't find it in load_mmu(), who can point out for me?
thanks!
Well, if you are speaking about the BEV flag from the Status (SR) register
(CP0_STATUS aka $12 of the 1st coprocessor)
then it controls the interruption/exception handler place, I don't see the
relation with mmu ...
is that must be set in bootloader?
OK, I see, it should be set to 0 by the boot loader so that the TLB
exceptions (related to the MMU) goes in RAM. So
the kernel does not change it actually and hope the boot loader did.
-- Florian Delizy
