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kernel: app_smem: allowing pinning memory partitions

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This allows memory partitions to be put into the pinned
section so they are available during boot. For example,
the stack guard (in libc partition) is needed during boot
but before the paging mechanism is initialized. Without
pinning it in physical memory, it would fault in early
boot process.

A new cmake property app_smem,pinned_partitions is
introduced so that additional partitions can be pinned
if needed.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2021-07-12 13:33:32 -07:00 • committed by Christopher Friedt
commit 2117a2a44b
10 changed files with 216 additions and 26 deletions
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2
include/linker/sections.h
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@ -28,6 +28,8 @@
#define _APP_BSS_SECTION_NAME app_bss
#define _APP_NOINIT_SECTION_NAME app_noinit
#define _APP_SMEM_PINNED_SECTION_NAME app_smem_pinned
#define _UNDEFINED_SECTION_NAME undefined
/* Interrupts */