1249268Sglebius/*- 2249268Sglebius * Copyright (c) 2012, 2013 Konstantin Belousov <kib@FreeBSD.org> 3249268Sglebius * All rights reserved. 4249268Sglebius * 5249268Sglebius * Redistribution and use in source and binary forms, with or without 6249268Sglebius * modification, are permitted provided that the following conditions 7249268Sglebius * are met: 8249268Sglebius * 1. Redistributions of source code must retain the above copyright 9249268Sglebius * notice, this list of conditions and the following disclaimer. 10249268Sglebius * 2. Redistributions in binary form must reproduce the above copyright 11249268Sglebius * notice, this list of conditions and the following disclaimer in the 12249268Sglebius * documentation and/or other materials provided with the distribution. 13249268Sglebius * 14249268Sglebius * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15249268Sglebius * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16249268Sglebius * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17249268Sglebius * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18249268Sglebius * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19249268Sglebius * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20249268Sglebius * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21249268Sglebius * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22249268Sglebius * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23249268Sglebius * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24249268Sglebius * SUCH DAMAGE. 25249268Sglebius * 26249268Sglebius * $FreeBSD: stable/11/sys/powerpc/include/counter.h 328386 2018-01-25 02:45:21Z pkelsey $ 27249268Sglebius */ 28249268Sglebius 29249268Sglebius#ifndef __MACHINE_COUNTER_H__ 30249268Sglebius#define __MACHINE_COUNTER_H__ 31249268Sglebius 32249268Sglebius#include <sys/pcpu.h> 33249268Sglebius#ifdef INVARIANTS 34249268Sglebius#include <sys/proc.h> 35249268Sglebius#endif 36249268Sglebius 37258247Snwhitehorn#ifdef __powerpc64__ 38249268Sglebius 39249268Sglebius#define counter_enter() do {} while (0) 40249268Sglebius#define counter_exit() do {} while (0) 41249268Sglebius 42252434Skib#ifdef IN_SUBR_COUNTER_C 43252434Skibstatic inline uint64_t 44252434Skibcounter_u64_read_one(uint64_t *p, int cpu) 45252434Skib{ 46252434Skib 47252434Skib return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu)); 48252434Skib} 49252434Skib 50252434Skibstatic inline uint64_t 51252434Skibcounter_u64_fetch_inline(uint64_t *p) 52252434Skib{ 53252434Skib uint64_t r; 54252434Skib int i; 55252434Skib 56252434Skib r = 0; 57302372Snwhitehorn CPU_FOREACH(i) 58252434Skib r += counter_u64_read_one((uint64_t *)p, i); 59252434Skib 60252434Skib return (r); 61252434Skib} 62252434Skib 63252434Skibstatic void 64252434Skibcounter_u64_zero_one_cpu(void *arg) 65252434Skib{ 66252434Skib 67252434Skib *((uint64_t *)((char *)arg + sizeof(struct pcpu) * 68252434Skib PCPU_GET(cpuid))) = 0; 69252434Skib} 70252434Skib 71252434Skibstatic inline void 72252434Skibcounter_u64_zero_inline(counter_u64_t c) 73252434Skib{ 74252434Skib 75328386Spkelsey smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 76328386Spkelsey smp_no_rendezvous_barrier, c); 77252434Skib} 78252434Skib#endif 79252434Skib 80249268Sglebius#define counter_u64_add_protected(c, i) counter_u64_add(c, i) 81249268Sglebius 82249304Skibextern struct pcpu __pcpu[MAXCPU]; 83249304Skib 84249268Sglebiusstatic inline void 85249268Sglebiuscounter_u64_add(counter_u64_t c, int64_t inc) 86249268Sglebius{ 87249268Sglebius uint64_t ccpu, old; 88249268Sglebius 89249268Sglebius __asm __volatile("\n" 90249268Sglebius "1:\n\t" 91249268Sglebius "mfsprg %0, 0\n\t" 92249268Sglebius "ldarx %1, %0, %2\n\t" 93249268Sglebius "add %1, %1, %3\n\t" 94249268Sglebius "stdcx. %1, %0, %2\n\t" 95249268Sglebius "bne- 1b" 96249268Sglebius : "=&b" (ccpu), "=&r" (old) 97249268Sglebius : "r" ((char *)c - (char *)&__pcpu[0]), "r" (inc) 98264338Sjhibbits : "cr0", "memory"); 99249268Sglebius} 100249268Sglebius 101258247Snwhitehorn#else /* !64bit */ 102249268Sglebius 103249268Sglebius#define counter_enter() critical_enter() 104249268Sglebius#define counter_exit() critical_exit() 105249268Sglebius 106252434Skib#ifdef IN_SUBR_COUNTER_C 107252434Skib/* XXXKIB non-atomic 64bit read */ 108252434Skibstatic inline uint64_t 109252434Skibcounter_u64_read_one(uint64_t *p, int cpu) 110252434Skib{ 111252434Skib 112252434Skib return (*(uint64_t *)((char *)p + sizeof(struct pcpu) * cpu)); 113252434Skib} 114252434Skib 115252434Skibstatic inline uint64_t 116252434Skibcounter_u64_fetch_inline(uint64_t *p) 117252434Skib{ 118252434Skib uint64_t r; 119252434Skib int i; 120252434Skib 121252434Skib r = 0; 122252434Skib for (i = 0; i < mp_ncpus; i++) 123252434Skib r += counter_u64_read_one((uint64_t *)p, i); 124252434Skib 125252434Skib return (r); 126252434Skib} 127252434Skib 128252434Skib/* XXXKIB non-atomic 64bit store, might interrupt increment */ 129252434Skibstatic void 130252434Skibcounter_u64_zero_one_cpu(void *arg) 131252434Skib{ 132252434Skib 133252434Skib *((uint64_t *)((char *)arg + sizeof(struct pcpu) * 134252434Skib PCPU_GET(cpuid))) = 0; 135252434Skib} 136252434Skib 137252434Skibstatic inline void 138252434Skibcounter_u64_zero_inline(counter_u64_t c) 139252434Skib{ 140252434Skib 141328386Spkelsey smp_rendezvous(smp_no_rendezvous_barrier, counter_u64_zero_one_cpu, 142328386Spkelsey smp_no_rendezvous_barrier, c); 143252434Skib} 144252434Skib#endif 145252434Skib 146249268Sglebius#define counter_u64_add_protected(c, inc) do { \ 147249268Sglebius CRITICAL_ASSERT(curthread); \ 148249268Sglebius *(uint64_t *)zpcpu_get(c) += (inc); \ 149249268Sglebius} while (0) 150249268Sglebius 151249268Sglebiusstatic inline void 152249268Sglebiuscounter_u64_add(counter_u64_t c, int64_t inc) 153249268Sglebius{ 154249268Sglebius 155249268Sglebius counter_enter(); 156249268Sglebius counter_u64_add_protected(c, inc); 157249268Sglebius counter_exit(); 158249268Sglebius} 159249268Sglebius 160258247Snwhitehorn#endif /* 64bit */ 161249268Sglebius 162249268Sglebius#endif /* ! __MACHINE_COUNTER_H__ */ 163