| /* | |
| * linux/arch/arm26/lib/changebit.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> | |
| .text | |
| /* Purpose : Function to change a bit | |
| * Prototype: int change_bit(int bit, void *addr) | |
| */ | |
| ENTRY(_change_bit_be) | |
| eor r0, r0, #0x18 @ big endian byte ordering | |
| ENTRY(_change_bit_le) | |
| and r2, r0, #7 | |
| mov r3, #1 | |
| mov r3, r3, lsl r2 | |
| save_and_disable_irqs ip, r2 | |
| ldrb r2, [r1, r0, lsr #3] | |
| eor r2, r2, r3 | |
| strb r2, [r1, r0, lsr #3] | |
| restore_irqs ip | |
| RETINSTR(mov,pc,lr) |