71e3c3083b
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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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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* $FreeBSD$
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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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extern struct pcpu __pcpu[];
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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 + sizeof(struct pcpu) * 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 + sizeof(struct pcpu) *
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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 + sizeof(struct pcpu) * 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 + sizeof(struct pcpu) *
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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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