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[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>
This commit is contained in:
Hyok S. Choi 2006-01-13 21:05:25 +00:00 committed by Russell King
parent e72b04756f
commit afeb90ca08
1 changed files with 7 additions and 0 deletions
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7
arch/arm/kernel/entry-armv.S
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@ -3,6 +3,7 @@
* *
* Copyright (C) 1996,1997,1998 Russell King. * Copyright (C) 1996,1997,1998 Russell King.
* ARM700 fix by Matthew Godbolt (linux-user@willothewisp.demon.co.uk) * 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 * 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 * it under the terms of the GNU General Public License version 2 as
@ -538,7 +539,11 @@ ENTRY(__switch_to)
add ip, r1, #TI_CPU_SAVE add ip, r1, #TI_CPU_SAVE
ldr r3, [r2, #TI_TP_VALUE] ldr r3, [r2, #TI_TP_VALUE]
stmia ip!, {r4 - sl, fp, sp, lr} @ Store most regs on stack 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]! ldr r6, [r2, #TI_CPU_DOMAIN]!
#endif
#if __LINUX_ARM_ARCH__ >= 6 #if __LINUX_ARM_ARCH__ >= 6
#ifdef CONFIG_CPU_MPCORE #ifdef CONFIG_CPU_MPCORE
clrex clrex
@ -556,7 +561,9 @@ ENTRY(__switch_to)
mov r4, #0xffff0fff mov r4, #0xffff0fff
str r3, [r4, #-15] @ TLS val at 0xffff0ff0 str r3, [r4, #-15] @ TLS val at 0xffff0ff0
#endif #endif
#ifdef CONFIG_MMU
mcr p15, 0, r6, c3, c0, 0 @ Set domain register mcr p15, 0, r6, c3, c0, 0 @ Set domain register
#endif
#ifdef CONFIG_VFP #ifdef CONFIG_VFP
@ Always disable VFP so we can lazily save/restore the old @ Always disable VFP so we can lazily save/restore the old
@ state. This occurs in the context of the previous thread. @ state. This occurs in the context of the previous thread.