Translation table for small pages in ARMv7 MMU conflicting with other data regions
utkarsh.rai60 at gmail.com
Wed Jul 29 16:07:40 UTC 2020
Thanks, I'll check it out.
On Wed, Jul 29, 2020 at 9:36 PM Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:
> On 29/07/2020 18:02, Utkarsh Rai wrote:
> > The translation table for ARMv7 MMU starts at 0x100000 and extends up
> > to 0x104000 for section-based pages. Although for small pages it
> > extends up to 0x504000 this possibly conflicts with other data regions
> > and setting up of translation table for smaller pages fails.
> > I realize that various data regions are placed at specified addresses
> > by linker scripts statically. One possible solution can be to replace the
> > 'pt = &ttb[ARM_MMU_TRANSLATION_TABLE_ENTRY_COUNT]', where pt is the
> > second-level page table base-address, with another address region,
> > although I am not sure which. Can you please point the right way to
> > proceed?
> For an example please have a look at the realview_pbx_a9_qemu BSP. It
> uses 4KiB pages. With the new build system it would be easier to set up.
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