1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2020-2021 The FreeBSD Foundation 5 * 6 * This software was developed by Björn Zeeb under sponsorship from 7 * the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef _LINUXKPI_LINUX_CPU_H 32 #define _LINUXKPI_LINUX_CPU_H 33 34 #include <sys/types.h> 35 #include <sys/systm.h> 36 #include <sys/cpuset.h> 37 #include <sys/smp.h> 38 #include <linux/compiler.h> 39 #include <linux/slab.h> 40 41 typedef cpuset_t cpumask_t; 42 43 extern cpumask_t cpu_online_mask; 44 45 cpumask_t *lkpi_get_static_single_cpu_mask(int); 46 47 static __inline int 48 cpumask_next(int cpuid, cpumask_t mask) 49 { 50 51 /* 52 * -1 can be an input to cpuid according to logic in drivers 53 * but is never a valid cpuid in a set! 54 */ 55 KASSERT((cpuid >= -1 && cpuid <= MAXCPU), ("%s: invalid cpuid %d\n", 56 __func__, cpuid)); 57 KASSERT(!CPU_EMPTY(&mask), ("%s: empty CPU mask", __func__)); 58 59 do { 60 cpuid++; 61 #ifdef SMP 62 if (cpuid > mp_maxid) 63 #endif 64 cpuid = 0; 65 } while (!CPU_ISSET(cpuid, &mask)); 66 return (cpuid); 67 } 68 69 static __inline void 70 cpumask_set_cpu(int cpu, cpumask_t *mask) 71 { 72 73 CPU_SET(cpu, mask); 74 } 75 76 #define cpumask_of(_cpu) (lkpi_get_static_single_cpu_mask(_cpu)) 77 78 #endif /* _LINUXKPI_LINUX_CPU_H */ 79