michaelh/zephyr
1
0
Fork 0
Code Releases Activity

linker: add bits for pinned regions

Browse source 
This adds the necessary bits for linker scripts and source code
to specify which symbols need to be pinned in memory. This is
needed for demand paging as some functions and data must reside
in memory all the time and cannot be paged out (e.g. paging,
scheduler, and interrupt routines for functionality).

This is up to the arch/SoC/board to define the sections in
their linker scripts as the pinned section may need special
alignment which cannot be done in common script snippets.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2021-02-23 13:33:38 -08:00 • committed by Kumar Gala
commit 1310ad6b0e
8 changed files with 164 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

11
Kconfig.zephyr
View file

@ -192,6 +192,17 @@ config LINKER_USE_BOOT_SECTION
Requires that boot sections exist in the architecture, SoC,
board or custom linker script.
config LINKER_USE_PINNED_SECTION
bool "Enable Usage of Pinned Linker Section"
help
If enabled, the symbols which need to be pinned in memory
will be put into another linker section reserved for pinned
symbols. During boot, the corresponding memory will be marked
as pinned.
Requires that pinned sections exist in the architecture, SoC,
board or custom linker script.
endmenu # "Linker Sections"
endmenu