[U-Boot] [PATCH] arm: psci: save and restore registers from r4 to r12

[Chenhui Zhao]

Save and restore core registers from r4 to r12 so that PSCI code won't
break their value.

Signed-off-by: Chenhui Zhao <chenhui.zhao at nxp.com>
Signed-off-by: Alison Wang <alison.wang at nxp.com>
Signed-off-by: Abhimanyu Saini <abhimanyu.saini at nxp.com>
---
 arch/arm/cpu/armv7/psci.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S
index 6a36208..746297c 100644
--- a/arch/arm/cpu/armv7/psci.S
+++ b/arch/arm/cpu/armv7/psci.S
@@ -152,7 +152,7 @@ _psci_table:
 	.word	0
 
 _smc_psci:
-	push	{r4-r7,lr}
+	push	{r4-r12,lr}
 
 	@ Switch to secure
 	mrc	p15, 0, r7, c1, c1, 0
@@ -175,7 +175,7 @@ _smc_psci:
 	@ Switch back to non-secure
 2:	mcr	p15, 0, r7, c1, c1, 0
 
-	pop	{r4-r7, lr}
+	pop	{r4-r12, lr}
 	movs	pc, lr			@ Return to the kernel
 
 @ Requires dense and single-cluster CPU ID space
-- 
1.9.1