diff options
Diffstat (limited to 'rtemsbsd/include/machine/counter.h')
| -rw-r--r-- | rtemsbsd/include/machine/counter.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/rtemsbsd/include/machine/counter.h b/rtemsbsd/include/machine/counter.h new file mode 100644 index 00000000..2e38c00c --- /dev/null +++ b/rtemsbsd/include/machine/counter.h @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2016 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 __MACHINE_COUNTER_H__ +#define __MACHINE_COUNTER_H__ + +#include <sys/pcpu.h> + +#include <rtems/score/isrlevel.h> + +#ifdef IN_SUBR_COUNTER_C + +static inline uint64_t +counter_u64_read_one(uint64_t *p, int cpu) +{ + + return (*((uint64_t *)((char *)p + sizeof(struct pcpu) * cpu))); +} + +static inline uint64_t +counter_u64_fetch_inline(uint64_t *p) +{ + uint64_t r; + uint32_t cpu; + + r = 0; + for (cpu = 0; cpu < _SMP_Get_processor_count(); ++cpu) { + r += counter_u64_read_one((uint64_t *)p, cpu); + } + + return (r); +} + +static inline void +counter_u64_zero_inline(counter_u64_t c) +{ + uint32_t cpu; + + for (cpu = 0; cpu < _SMP_Get_processor_count(); ++cpu) { + *((uint64_t *)((char *)c + sizeof(struct pcpu) * cpu)) = 0; + } +} +#endif + +static inline void +counter_u64_add_protected(counter_u64_t c, int64_t inc) +{ + + *(uint64_t *)zpcpu_get(c) += inc; +} + +static inline void +counter_u64_add(counter_u64_t c, int64_t inc) +{ + ISR_Level level; + + _ISR_Local_disable(level); + counter_u64_add_protected(c, inc); + _ISR_Local_enable(level); +} + +#endif /* ! __MACHINE_COUNTER_H__ */ |