From: Chen-Yu Tsai <wens@csie.org>
Date: Tue, 7 Jun 2016 02:54:25 +0000 (+0800)
Subject: ARM: PSCI: save and restore clobbered registers in v7_flush_dcache_all
X-Git-Url: http://git.dujemihanovic.xyz/html/index.html?a=commitdiff_plain;h=778dc5f43e92d8736a81e15fb0bbb6cb5a78c1ab;p=u-boot.git

ARM: PSCI: save and restore clobbered registers in v7_flush_dcache_all

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---

diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S
index cdd001fe3f..ab408378fc 100644
--- a/arch/arm/cpu/armv7/psci.S
+++ b/arch/arm/cpu/armv7/psci.S
@@ -110,6 +110,7 @@ ENDPROC(psci_get_cpu_id)
 
 /* Imported from Linux kernel */
 LENTRY(v7_flush_dcache_all)
+	stmfd	sp!, {r4-r5, r7, r9-r11, lr}
 	dmb					@ ensure ordering with previous memory accesses
 	mrc	p15, 1, r0, c0, c0, 1		@ read clidr
 	ands	r3, r0, #0x7000000		@ extract loc from clidr
@@ -153,6 +154,7 @@ finished:
 	mcr	p15, 2, r10, c0, c0, 0		@ select current cache level in cssr
 	dsb	st
 	isb
+	ldmfd	sp!, {r4-r5, r7, r9-r11, lr}
 	bx	lr
 ENDPROC(v7_flush_dcache_all)