diff options
author | Arnd Bergmann <arnd@arndb.de> | 2012-01-09 16:14:07 +0000 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2012-01-09 16:14:07 +0000 |
commit | 142f2101a86ade2d6c9dfbedf82e1b5b31c8fce6 (patch) | |
tree | 8cced517382b7087df4e89a9e2a00ccac9676a92 /arch/arm/lib/call_with_stack.S | |
parent | 155bc27fdfbdf65a07a4f8ef3eafa25e57d8b511 (diff) | |
parent | a07613a54d700a974f3a4a657da78ef5d097315d (diff) |
Merge branch 'samsung/cleanup' into samsung/driver
Conflicts:
arch/arm/mach-s5p64x0/cpu.c -> common.c
More changes to a file that got moved into common.c,
see previous conflict resolutions.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/lib/call_with_stack.S')
-rw-r--r-- | arch/arm/lib/call_with_stack.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/lib/call_with_stack.S b/arch/arm/lib/call_with_stack.S new file mode 100644 index 000000000000..916c80f13ae7 --- /dev/null +++ b/arch/arm/lib/call_with_stack.S @@ -0,0 +1,44 @@ +/* + * arch/arm/lib/call_with_stack.S + * + * Copyright (C) 2011 ARM Ltd. + * Written by Will Deacon <will.deacon@arm.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 + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/linkage.h> +#include <asm/assembler.h> + +/* + * void call_with_stack(void (*fn)(void *), void *arg, void *sp) + * + * Change the stack to that pointed at by sp, then invoke fn(arg) with + * the new stack. + */ +ENTRY(call_with_stack) + str sp, [r2, #-4]! + str lr, [r2, #-4]! + + mov sp, r2 + mov r2, r0 + mov r0, r1 + + adr lr, BSYM(1f) + mov pc, r2 + +1: ldr lr, [sp] + ldr sp, [sp, #4] + mov pc, lr +ENDPROC(call_with_stack) |