Translation table for small pages in ARMv7 MMU conflicting with other data regions
sebastian.huber at embedded-brains.de
Wed Jul 29 16:06:00 UTC 2020
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
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.
More information about the devel