mirror of
https://github.com/freebsd/freebsd-src
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163 lines
3.9 KiB
C
163 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2012, 2013 Konstantin Belousov <kib@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __MACHINE_COUNTER_H__
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#define __MACHINE_COUNTER_H__
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#include <sys/pcpu.h>
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#ifdef INVARIANTS
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#include <sys/proc.h>
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#endif
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#define EARLY_COUNTER &__pcpu[0].pc_early_dummy_counter
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#ifdef __powerpc64__
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#define counter_enter() do {} while (0)
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#define counter_exit() do {} while (0)
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#ifdef IN_SUBR_COUNTER_C
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static inline uint64_t
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counter_u64_read_one(uint64_t *p, int cpu)
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{
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return (*(uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE * cpu));
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}
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static inline uint64_t
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counter_u64_fetch_inline(uint64_t *p)
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{
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uint64_t r;
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int i;
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r = 0;
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CPU_FOREACH(i)
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r += counter_u64_read_one((uint64_t *)p, i);
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return (r);
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}
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static void
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counter_u64_zero_one_cpu(void *arg)
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{
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*((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE *
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PCPU_GET(cpuid))) = 0;
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}
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static inline void
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counter_u64_zero_inline(counter_u64_t c)
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{
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smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
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smp_no_rendezvous_barrier, c);
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}
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#endif
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#define counter_u64_add_protected(c, i) counter_u64_add(c, i)
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static inline void
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counter_u64_add(counter_u64_t c, int64_t inc)
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{
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uint64_t ccpu, old;
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__asm __volatile("\n"
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"1:\n\t"
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"mfsprg %0, 0\n\t"
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"ldarx %1, %0, %2\n\t"
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"add %1, %1, %3\n\t"
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"stdcx. %1, %0, %2\n\t"
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"bne- 1b"
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: "=&b" (ccpu), "=&r" (old)
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: "r" ((char *)c - (char *)&__pcpu[0]), "r" (inc)
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: "cr0", "memory");
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}
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#else /* !64bit */
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#define counter_enter() critical_enter()
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#define counter_exit() critical_exit()
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#ifdef IN_SUBR_COUNTER_C
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/* XXXKIB non-atomic 64bit read */
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static inline uint64_t
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counter_u64_read_one(uint64_t *p, int cpu)
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{
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return (*(uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE * cpu));
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}
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static inline uint64_t
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counter_u64_fetch_inline(uint64_t *p)
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{
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uint64_t r;
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int i;
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r = 0;
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for (i = 0; i < mp_ncpus; i++)
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r += counter_u64_read_one((uint64_t *)p, i);
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return (r);
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}
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/* XXXKIB non-atomic 64bit store, might interrupt increment */
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static void
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counter_u64_zero_one_cpu(void *arg)
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{
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*((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE *
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PCPU_GET(cpuid))) = 0;
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}
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static inline void
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counter_u64_zero_inline(counter_u64_t c)
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{
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smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
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smp_no_rendezvous_barrier, c);
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}
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#endif
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#define counter_u64_add_protected(c, inc) do { \
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CRITICAL_ASSERT(curthread); \
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*(uint64_t *)zpcpu_get(c) += (inc); \
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} while (0)
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static inline void
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counter_u64_add(counter_u64_t c, int64_t inc)
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{
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counter_enter();
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counter_u64_add_protected(c, inc);
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counter_exit();
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}
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#endif /* 64bit */
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#endif /* ! __MACHINE_COUNTER_H__ */
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