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ARM: Respect CONFIG_SPL_STACK define in lowlevel_init.S 

The SPL and U-Boot proper may use different initial stack
locations, which are configured via CONFIG_SPL_STACK and
CONFIG_SYS_INIT_SP_ADDR defines. The lowlevel_init.S
code needs to handle this in the same way as crt0.S

Without this fix, setting the U-Boot stack location to some
place, which is not safely accessible by the SPL (such as
the DRAM), causes a very early SPL deadlock.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Siarhei Siamashka 2016-09-05 06:36:10 +03:00 committed by Tom Rini
parent 24307d6337
commit 22a402f00c
1 changed files with 4 additions and 0 deletions
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4
arch/arm/cpu/armv7/lowlevel_init.S
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@ -19,7 +19,11 @@ ENTRY(lowlevel_init)
/*
* Setup a temporary stack. Global data is not available yet.
*/
#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
ldr sp, =CONFIG_SPL_STACK
#else
ldr sp, =CONFIG_SYS_INIT_SP_ADDR
#endif
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
#ifdef CONFIG_SPL_DM
mov r9, #0