diff options
Diffstat (limited to 'drivers/staging/ccree/cc_bitops.h')
-rw-r--r-- | drivers/staging/ccree/cc_bitops.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/staging/ccree/cc_bitops.h b/drivers/staging/ccree/cc_bitops.h new file mode 100644 index 0000000..3a39565 --- /dev/null +++ b/drivers/staging/ccree/cc_bitops.h @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2012-2017 ARM Limited or its affiliates. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +/*! + * \file cc_bitops.h + * Bit fields operations macros. + */ +#ifndef _CC_BITOPS_H_ +#define _CC_BITOPS_H_ + +#define BITMASK(mask_size) (((mask_size) < 32) ? \ + ((1UL << (mask_size)) - 1) : 0xFFFFFFFFUL) +#define BITMASK_AT(mask_size, mask_offset) (BITMASK(mask_size) << (mask_offset)) + +#define BITFIELD_GET(word, bit_offset, bit_size) \ + (((word) >> (bit_offset)) & BITMASK(bit_size)) +#define BITFIELD_SET(word, bit_offset, bit_size, new_val) do { \ + word = ((word) & ~BITMASK_AT(bit_size, bit_offset)) | \ + (((new_val) & BITMASK(bit_size)) << (bit_offset)); \ +} while (0) + +/* Is val aligned to "align" ("align" must be power of 2) */ +#ifndef IS_ALIGNED +#define IS_ALIGNED(val, align) \ + (((uintptr_t)(val) & ((align) - 1)) == 0) +#endif + +#define SWAP_ENDIAN(word) \ + (((word) >> 24) | (((word) & 0x00FF0000) >> 8) | \ + (((word) & 0x0000FF00) << 8) | (((word) & 0x000000FF) << 24)) + +#ifdef BIG__ENDIAN +#define SWAP_TO_LE(word) SWAP_ENDIAN(word) +#define SWAP_TO_BE(word) word +#else +#define SWAP_TO_LE(word) word +#define SWAP_TO_BE(word) SWAP_ENDIAN(word) +#endif + + + +/* Is val a multiple of "mult" ("mult" must be power of 2) */ +#define IS_MULT(val, mult) \ + (((val) & ((mult) - 1)) == 0) + +#define IS_NULL_ADDR(adr) \ + (!(adr)) + +#endif /*_CC_BITOPS_H_*/ |