1/* 2 * Copyright (C) 2013 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 17#include <linux/linkage.h> 18#include <asm/assembler.h> 19 20/* 21 * Fill in the buffer with character c (alignment handled by the hardware) 22 * 23 * Parameters: 24 * x0 - buf 25 * x1 - c 26 * x2 - n 27 * Returns: 28 * x0 - buf 29 */ 30ENTRY(memset) 31 mov x4, x0 32 and w1, w1, #0xff 33 orr w1, w1, w1, lsl #8 34 orr w1, w1, w1, lsl #16 35 orr x1, x1, x1, lsl #32 36 subs x2, x2, #8 37 b.mi 2f 381: str x1, [x4], #8 39 subs x2, x2, #8 40 b.pl 1b 412: adds x2, x2, #4 42 b.mi 3f 43 sub x2, x2, #4 44 str w1, [x4], #4 453: adds x2, x2, #2 46 b.mi 4f 47 sub x2, x2, #2 48 strh w1, [x4], #2 494: adds x2, x2, #1 50 b.mi 5f 51 strb w1, [x4] 525: ret 53ENDPROC(memset) 54