diff options
Diffstat (limited to 'drivers/bus/dpaa/include/dpaa_bits.h')
| -rw-r--r-- | drivers/bus/dpaa/include/dpaa_bits.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/bus/dpaa/include/dpaa_bits.h b/drivers/bus/dpaa/include/dpaa_bits.h new file mode 100644 index 00000000..71f2d809 --- /dev/null +++ b/drivers/bus/dpaa/include/dpaa_bits.h @@ -0,0 +1,65 @@ +/*- + * BSD LICENSE + * + * Copyright 2017 NXP. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of NXP nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __DPAA_BITS_H +#define __DPAA_BITS_H + +/* Bitfield stuff. */ +#define BITS_PER_ULONG (sizeof(unsigned long) << 3) +#define SHIFT_PER_ULONG (((1 << 5) == BITS_PER_ULONG) ? 5 : 6) +#define BITS_MASK(idx) (1UL << ((idx) & (BITS_PER_ULONG - 1))) +#define BITS_IDX(idx) ((idx) >> SHIFT_PER_ULONG) + +static inline void dpaa_set_bits(unsigned long mask, + volatile unsigned long *p) +{ + *p |= mask; +} + +static inline void dpaa_set_bit(int idx, volatile unsigned long *bits) +{ + dpaa_set_bits(BITS_MASK(idx), bits + BITS_IDX(idx)); +} + +static inline void dpaa_clear_bits(unsigned long mask, + volatile unsigned long *p) +{ + *p &= ~mask; +} + +static inline void dpaa_clear_bit(int idx, + volatile unsigned long *bits) +{ + dpaa_clear_bits(BITS_MASK(idx), bits + BITS_IDX(idx)); +} + +#endif /* __DPAA_BITS_H */ |