2 * Based on arch/arm/lib/bitops.h
4 * Copyright (C) 2013 ARM Ltd.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/linkage.h>
20 #include <asm/assembler.h>
23 * x0: bits 5:0 bit offset
24 * bits 31:6 word offset
27 .macro bitop, name, instr
29 and w3, w0, #63 // Get bit offset
30 eor w0, w0, w3 // Clear low bits
32 add x1, x1, x0, lsr #3 // Get word offset
33 lsl x3, x2, x3 // Create mask
42 .macro testop, name, instr
44 and w3, w0, #63 // Get bit offset
45 eor w0, w0, w3 // Clear low bits
47 add x1, x1, x0, lsr #3 // Get word offset
48 lsl x4, x2, x3 // Create mask
50 lsr x0, x2, x3 // Save old value of bit
51 \instr x2, x2, x4 // toggle bit
60 * Atomic bit operations.
66 testop test_and_change_bit, eor
67 testop test_and_clear_bit, bic
68 testop test_and_set_bit, orr