2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #ifndef __MACHINE_COUNTER_H__
32 #define __MACHINE_COUNTER_H__
36 #define EARLY_COUNTER &temp_bsp_pcpu.pc_early_dummy_counter
38 #define counter_enter() do {} while (0)
39 #define counter_exit() do {} while (0)
41 #ifdef IN_SUBR_COUNTER_C
42 static inline uint64_t
43 counter_u64_read_one(uint64_t *p, int cpu)
46 return (*(uint64_t *)((char *)p + UMA_PCPU_ALLOC_SIZE * cpu));
49 static inline uint64_t
50 counter_u64_fetch_inline(uint64_t *p)
57 r += counter_u64_read_one((uint64_t *)p, i);
63 counter_u64_zero_one_cpu(void *arg)
66 *((uint64_t *)((char *)arg + UMA_PCPU_ALLOC_SIZE *
67 PCPU_GET(cpuid))) = 0;
71 counter_u64_zero_inline(counter_u64_t c)
74 smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu,
75 smp_no_rendezvous_barrier, c);
79 #define counter_u64_add_protected(c, i) counter_u64_add(c, i)
82 counter_u64_add(counter_u64_t c, int64_t inc)
85 KASSERT(IS_BSP() || c != EARLY_COUNTER, ("EARLY_COUNTER used on AP"));
86 __asm __volatile("addq\t%1,%%gs:(%0)"
88 : "r" ((char *)c - (char *)&__pcpu[0]), "ri" (inc)
92 #endif /* ! __MACHINE_COUNTER_H__ */