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ARM: arm926ejs: fix lowlevel_init call

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The code attempts to preserve the value of LR by storing it in R12/IP
across the lowevel_init() call.  However, this register is not saved
by the callee.  Use a register that guaranteed to be preserved instead.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
2018-04-21 16:11:07 +01:00
committed by Stefano Babic
parent 9482aeda66
commit da372af6e4
1 changed files with 2 additions and 2 deletions
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4
arch/arm/cpu/arm926ejs/start.S
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@@ -105,9 +105,9 @@ flush_dcache:
/* /*
* Go setup Memory and board specific bits prior to relocation. * Go setup Memory and board specific bits prior to relocation.
*/ */
mov ip, lr /* perserve link reg across call */ mov r4, lr /* perserve link reg across call */
bl lowlevel_init /* go setup pll,mux,memory */ bl lowlevel_init /* go setup pll,mux,memory */
mov lr, ip /* restore link */ mov lr, r4 /* restore link */
#endif #endif
mov pc, lr /* back to my caller */ mov pc, lr /* back to my caller */
#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ #endif /* CONFIG_SKIP_LOWLEVEL_INIT */