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
cpumask_next(int cpuid,cpumask_t mask)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
cpumask_set_cpu(int cpu,cpumask_t * mask)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