From: Mans Rullgard <mans@mansr.com>
Date: Sat, 21 Apr 2018 15:11:07 +0000 (+0100)
Subject: ARM: arm926ejs: fix lowlevel_init call
X-Git-Tag: v2018.05-rc3~1^2~3
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=da372af6e40d84e8a47baa41d22dd3e953469b74;p=u-boot

ARM: arm926ejs: fix lowlevel_init call

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>
---

diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 959d1ed86d..a6f0bdb703 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -105,9 +105,9 @@ flush_dcache:
 	/*
 	 * 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 */
-	mov	lr, ip		/* restore link */
+	mov	lr, r4		/* restore link */
 #endif
 	mov	pc, lr		/* back to my caller */
 #endif /* CONFIG_SKIP_LOWLEVEL_INIT */