[ARM] Support register switch in nommu mode
This patch adds register switch support in nommu mode.
Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index a52baed..fb8e7f4 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -3,6 +3,7 @@
*
* Copyright (C) 1996,1997,1998 Russell King.
* ARM700 fix by Matthew Godbolt (linux-user@willothewisp.demon.co.uk)
+ * nommu support by Hyok S. Choi (hyok.choi@samsung.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -538,7 +539,11 @@
add ip, r1, #TI_CPU_SAVE
ldr r3, [r2, #TI_TP_VALUE]
stmia ip!, {r4 - sl, fp, sp, lr} @ Store most regs on stack
+#ifndef CONFIG_MMU
+ add r2, r2, #TI_CPU_DOMAIN
+#else
ldr r6, [r2, #TI_CPU_DOMAIN]!
+#endif
#if __LINUX_ARM_ARCH__ >= 6
#ifdef CONFIG_CPU_MPCORE
clrex
@@ -556,7 +561,9 @@
mov r4, #0xffff0fff
str r3, [r4, #-15] @ TLS val at 0xffff0ff0
#endif
+#ifdef CONFIG_MMU
mcr p15, 0, r6, c3, c0, 0 @ Set domain register
+#endif
#ifdef CONFIG_VFP
@ Always disable VFP so we can lazily save/restore the old
@ state. This occurs in the context of the previous thread.