On Sun, 20 Aug 2017, Mark Cave-Ayland wrote:
On 20/08/17 22:59, BALATON Zoltan wrote:
So I'd suggest adding debugging to alloc_tlb() to find out why TLB slot
0 is being chosen again for the 0x8000 mapping even though
free_tlb() hasn't been called for that entry.
I've tried that but it onl
On 20/08/17 22:59, BALATON Zoltan wrote:
>> So I'd suggest adding debugging to alloc_tlb() to find out why TLB slot
>> 0 is being chosen again for the 0x8000 mapping even though
>> free_tlb() hasn't been called for that entry.
>
> I've tried that but it only confirmed what I thought. This is
On Sun, 20 Aug 2017, Mark Cave-Ayland wrote:
Just glancing at the code again it looks like the choice of slot is
determined by alloc_tlb(). It seems there are 64 TLB slots stored in
tlb_info as 2 x 32-bit bitmaps where a 1 bit indicates the slot is free
and a 0 bit indicates the slot is in use.
On 20/08/17 14:35, BALATON Zoltan wrote:
> Anyway, this makes more sense because if the TLB 0 entry is replaced
> like the above log shows then there will be no mapping for the ff7fd648
> address until the next map_region call maps it. On real hardware this
> seems to work but on QEMU this causes
On Sun, 20 Aug 2017, Mark Cave-Ayland wrote:
I've only spent a small amount of time in PPC MMU land via OpenBIOS but
the obvious thing that stands out here is this:
helper_440_tlbwe word 0 entry 0 value ff7f7210
tlb_flush_nocheck: (count: 36)
helper_440_tlbwe word 1 entry 0 value 007f7000
tlb_fl
On 20/08/17 00:19, BALATON Zoltan wrote:
> This function is defined in AROS/arch/ppc-sam440/kernel/mmu.c:95 at the
> link below. I think it basically generates tlbwe instructions to set up
> a TLB entry to map the region to a virtual address.
>
>> eg: what is in the MAS registers before the tlbwe
On Sun, 20 Aug 2017, KONRAD Frederic wrote:
Hi,
I think you need to go more in detail in what this map_region
function does..
This function is defined in AROS/arch/ppc-sam440/kernel/mmu.c:95 at the
link below. I think it basically generates tlbwe instructions to set up a
TLB entry to map the
