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
38 struct cpu_info;
39
40 #ifdef _KERNEL
41 #ifndef cpu_idle
42 void 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
59 void 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
77 void cpu_offline_md(void);
78 #endif
79
80 struct lwp *cpu_switchto(struct lwp *, struct lwp *, bool);
81 struct cpu_info *cpu_lookup(u_int);
82 int cpu_setmodel(const char *fmt, ...) __printflike(1, 2);
83 const char *cpu_getmodel(void);
84 int cpu_setstate(struct cpu_info *, bool);
85 int cpu_setintr(struct cpu_info *, bool);
86 bool cpu_intr_p(void);
87 bool cpu_softintr_p(void);
88 bool cpu_kpreempt_enter(uintptr_t, int);
89 void cpu_kpreempt_exit(uintptr_t);
90 bool cpu_kpreempt_disabled(void);
91 int cpu_lwp_setprivate(struct lwp *, void *);
92 void cpu_intr_redistribute(void);
93 u_int cpu_intr_count(struct cpu_info *);
94 #endif
95
96 #ifdef _KERNEL
97 extern kmutex_t cpu_lock;
98 extern u_int maxcpus;
99 extern struct cpu_info **cpu_infos;
100 extern kcpuset_t *kcpuset_attached;
101 extern kcpuset_t *kcpuset_running;
102
103 static inline u_int
cpu_index(const struct cpu_info * ci)104 cpu_index(const struct cpu_info *ci)
105 {
106 return ci->ci_index;
107 }
108
109 static inline char *
cpu_name(struct cpu_info * ci)110 cpu_name(struct cpu_info *ci)
111 {
112 return ci->ci_data.cpu_name;
113 }
114
115 #ifdef CPU_UCODE
116 struct cpu_ucode_softc {
117 int loader_version;
118 char *sc_blob;
119 off_t sc_blobsize;
120 };
121
122 int cpu_ucode_get_version(struct cpu_ucode_version *);
123 int cpu_ucode_apply(const struct cpu_ucode *);
124 #ifdef COMPAT_60
125 int compat6_cpu_ucode_get_version(struct compat6_cpu_ucode *);
126 int compat6_cpu_ucode_apply(const struct compat6_cpu_ucode *);
127 #endif
128 int cpu_ucode_load(struct cpu_ucode_softc *, const char *);
129 int 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