pxa: Save lr register in relocate_code function

When u-boot is compiled for PXA25x processor, pxa/start.S is calling
cpu_init_crit by BL instruction. BL is overwriting lr register so
relocate_code is going into infinite loop. This patch preservs lr
register in r12 before calling cpu_init_crit and after function returns
restores it.

Signed-off-by: Lukasz Dalek <luk0104@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>

diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index 72af869..e71803e 100644 (file)
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -183,7 +183,9 @@ relocate_code:
 
 /* Disable the Dcache RAM lock for stack now */
 #ifdef CONFIG_CPU_PXA25X
+       mov     r12, lr
        bl      cpu_init_crit
+       mov     lr, r12
 #endif
 
        adr     r0, _start