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xtensa: userspace: swap page tables via assembly code

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Since the necessary register values are now pre-computed and
stored in the memory domain struct, we can use them directly
in various assembly locations, thus replacing the function
call to xtensa_swap_update_page_tables().

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2025-04-04 13:44:40 -07:00 • committed by Benjamin Cabé
commit 277fa9e8ac
8 changed files with 77 additions and 13 deletions
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soc/cdns/dc233c/include/xtensa-dc233c.ld
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@ -162,7 +162,6 @@ SECTIONS
/* Userspace related stuff */
LIB_OBJ_FUNC_IN_SECT(libarch__xtensa__core.a,userspace.S.obj,xtensa_do_syscall)
LIB_OBJ_FUNC_IN_SECT(libarch__xtensa__core.a,ptables.c.obj,xtensa_swap_update_page_tables)
/* Below are to speed up execution by avoiding TLB misses
* on frequently used functions.