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mmu: pin the whole kernel

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This will enable testing of the implementation until the
critical set of pages is identified and known to the
kernel.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2020-12-18 16:06:09 -08:00 • committed by Anas Nashif
commit a45486e1d5
1 changed files with 14 additions and 2 deletions
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16
kernel/mmu.c
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@ -527,8 +527,20 @@ void z_mem_manage_init(void)
*/
VIRT_FOREACH(Z_KERNEL_VIRT_START, Z_KERNEL_VIRT_SIZE, addr)
{
frame_mapped_set(z_phys_to_page_frame(BOOT_VIRT_TO_PHYS(addr)),
addr);
pf = z_phys_to_page_frame(BOOT_VIRT_TO_PHYS(addr));
frame_mapped_set(pf, addr);
/* TODO: for now we pin the whole Zephyr image. Demand paging
* currently tested with anonymously-mapped pages which are not
* pinned.
*
* We will need to setup linker regions for a subset of kernel
* code/data pages which are pinned in memory and
* may not be evicted. This will contain critical CPU data
* structures, and any code used to perform page fault
* handling, page-ins, etc.
*/
pf->flags |= Z_PAGE_FRAME_PINNED;
}
/* Any remaining pages that aren't mapped, reserved, or pinned get