blob: 0a895b0c759f72fa3336b078936c8debb4e1bb90 [file] [log] [blame]
* linux/arch/arm26/lib/clearbit.S
* Copyright (C) 1995-1996 Russell King
* 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.
#include <linux/linkage.h>
#include <asm/assembler.h>
* Purpose : Function to clear a bit
* Prototype: int clear_bit(int bit, void *addr)
eor r0, r0, #0x18 @ big endian byte ordering
and r2, r0, #7
mov r3, #1
mov r3, r3, lsl r2
save_and_disable_irqs ip, r2
ldrb r2, [r1, r0, lsr #3]
bic r2, r2, r3
strb r2, [r1, r0, lsr #3]
restore_irqs ip