1/* $NetBSD: cpu.h,v 1.41 2014/05/19 20:39:23 rmind Exp $ */
2
3/*-
4 * Copyright (c) 2007 YAMAMOTO Takashi,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 */
28
29#ifndef _SYS_CPU_H_
30#define _SYS_CPU_H_
31
32#ifndef _LOCORE
33
34#include <machine/cpu.h>
35
36#include <sys/lwp.h>
37
38struct cpu_info;
39
40#ifdef _KERNEL
41#ifndef cpu_idle
42void cpu_idle(void);
43#endif
44
45#ifdef CPU_UCODE
46#include <sys/cpuio.h>
47#include <dev/firmload.h>
48#ifdef COMPAT_60
49#include <compat/sys/cpuio.h>
50#endif
51#endif
52
53/*
54 * cpu_need_resched() must always be called with the target CPU
55 * locked (via spc_lock() or another route), unless called locally.
56 * If called locally, the caller need only be at IPL_SCHED.
57 */
58#ifndef cpu_need_resched
59void cpu_need_resched(struct cpu_info *, int);
60#endif
61
62#ifndef cpu_did_resched
63#define cpu_did_resched(l) /* nothing */
64#endif
65
66#ifndef CPU_INFO_ITERATOR
67#define CPU_INFO_ITERATOR int
68#define CPU_INFO_FOREACH(cii, ci) \
69 (void)cii, ci = curcpu(); ci != NULL; ci = NULL
70#endif
71
72#ifndef CPU_IS_PRIMARY
73#define CPU_IS_PRIMARY(ci) ((void)ci, 1)
74#endif
75
76#ifdef __HAVE_MD_CPU_OFFLINE
77void cpu_offline_md(void);
78#endif
79
80struct lwp *cpu_switchto(struct lwp *, struct lwp *, bool);
81struct cpu_info *cpu_lookup(u_int);
82int cpu_setmodel(const char *fmt, ...) __printflike(1, 2);
83const char *cpu_getmodel(void);
84int cpu_setstate(struct cpu_info *, bool);
85int cpu_setintr(struct cpu_info *, bool);
86bool cpu_intr_p(void);
87bool cpu_softintr_p(void);
88bool cpu_kpreempt_enter(uintptr_t, int);
89void cpu_kpreempt_exit(uintptr_t);
90bool cpu_kpreempt_disabled(void);
91int cpu_lwp_setprivate(struct lwp *, void *);
92void cpu_intr_redistribute(void);
93u_int cpu_intr_count(struct cpu_info *);
94#endif
95
96#ifdef _KERNEL
97extern kmutex_t cpu_lock;
98extern u_int maxcpus;
99extern struct cpu_info **cpu_infos;
100extern kcpuset_t *kcpuset_attached;
101extern kcpuset_t *kcpuset_running;
102
103static inline u_int
104cpu_index(const struct cpu_info *ci)
105{
106 return ci->ci_index;
107}
108
109static inline char *
110cpu_name(struct cpu_info *ci)
111{
112 return ci->ci_data.cpu_name;
113}
114
115#ifdef CPU_UCODE
116struct cpu_ucode_softc {
117 int loader_version;
118 char *sc_blob;
119 off_t sc_blobsize;
120};
121
122int cpu_ucode_get_version(struct cpu_ucode_version *);
123int cpu_ucode_apply(const struct cpu_ucode *);
124#ifdef COMPAT_60
125int compat6_cpu_ucode_get_version(struct compat6_cpu_ucode *);
126int compat6_cpu_ucode_apply(const struct compat6_cpu_ucode *);
127#endif
128int cpu_ucode_load(struct cpu_ucode_softc *, const char *);
129int cpu_ucode_md_open(firmware_handle_t *, int, const char *);
130#endif
131
132#endif
133#endif /* !_LOCORE */
134
135/* flags for cpu_need_resched */
136#define RESCHED_LAZY 0x01 /* request a ctx switch */
137#define RESCHED_IMMED 0x02 /* request an immediate ctx switch */
138#define RESCHED_KPREEMPT 0x04 /* request in-kernel preemption */
139
140#endif /* !_SYS_CPU_H_ */
141