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xtensa: move vecbase SR initialization to _startup 

Instead of initializing vecbase in initialize_mmu macro, which may be
expanded either in Image.elf reset vector hadler or in the kernel
head.S, both times only when CONFIG_MMU is enabled, do this
initialization once in _startup function.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2014-10-04 05:12:27 +04:00
parent a4f9846da7
commit 53490121e9
2 changed files with 5 additions and 3 deletions
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3
arch/xtensa/include/asm/initialize_mmu.h
View File

@ -141,9 +141,6 @@
jx a4 jx a4
1: 1:
movi a2, VECBASE_RESET_VADDR
wsr a2, vecbase
/* Step 5: remove temporary mapping. */ /* Step 5: remove temporary mapping. */
idtlb a7 idtlb a7
iitlb a7 iitlb a7

5
arch/xtensa/kernel/head.S
View File

@ -112,6 +112,11 @@ ENTRY(_startup)
movi a0, 0 movi a0, 0
#if XCHAL_HAVE_VECBASE
movi a2, VECBASE_RESET_VADDR
wsr a2, vecbase
#endif
/* Clear debugging registers. */ /* Clear debugging registers. */
#if XCHAL_HAVE_DEBUG #if XCHAL_HAVE_DEBUG