1 /* $NetBSD: cpu.h,v 1.5 2021/08/14 17:51:19 ryo Exp $ */
2
3 /*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _OR1K_CPU_H_
33 #define _OR1K_CPU_H_
34
35 #if defined(_KERNEL) || defined(_KMEMUSER)
36 struct clockframe {
37 uintptr_t cf_pc;
38 uint32_t cf_sr;
39 int cf_intr_depth;
40 };
41
42 #define CLKF_USERMODE(cf) (((cf)->cf_sr & 1) == 0)
43 #define CLKF_PC(cf) ((cf)->cf_pc)
44 #define CLKF_INTR(cf) ((cf)->cf_intr_depth > 0)
45
46 #include <sys/cpu_data.h>
47 #include <sys/device_if.h>
48 #include <sys/intr.h>
49
50 struct cpu_info {
51 struct cpu_data ci_data;
52 device_t ci_dev;
53 cpuid_t ci_cpuid;
54 struct lwp *ci_curlwp;
55 struct lwp *ci_onproc; /* current user LWP / kthread */
56 struct lwp *ci_softlwps[SOFTINT_COUNT];
57
58 uint64_t ci_lastintr;
59
60 int ci_mtx_oldspl;
61 int ci_mtx_count;
62
63 int ci_want_resched;
64 int ci_cpl;
65 u_int ci_softints;
66 volatile u_int ci_intr_depth;
67 #if defined(GPROF) && defined(MULTIPROCESSOR)
68 struct gmonparam *ci_gmon; /* MI per-cpu GPROF */
69 #endif
70 };
71
72 register struct lwp *or1k_curlwp __asm("r10");
73 #define curlwp or1k_curlwp
74
75 static __inline struct cpu_info *
curcpu(void)76 curcpu(void)
77 {
78 return curlwp->l_cpu;
79 }
80
81 static __inline cpuid_t
cpu_number(void)82 cpu_number(void)
83 {
84 #ifdef MULTIPROCESSOR
85 return curcpu()->ci_cpuid;
86 #else
87 return 0;
88 #endif
89 }
90
91 void cpu_proc_fork(struct proc *, struct proc *);
92 void cpu_signotify(struct lwp *);
93 void cpu_need_proftick(struct lwp *l);
94 void cpu_boot_secondary_processors(void);
95
96 #define CPU_INFO_ITERATOR cpuid_t
97 #ifdef MULTIPROCESSOR
98 #define CPU_INFO_FOREACH(cii, ci) \
99 (cii) = 0; ((ci) = cpu_infos[cii]) != NULL; (cii)++
100 #else
101 #define CPU_INFO_FOREACH(cii, ci) \
102 (cii) = 0; (cii) == 0 && (ci) = curcpu(); (cii)++
103 #endif
104
105 static __inline void
cpu_dosoftints(void)106 cpu_dosoftints(void)
107 {
108 extern void dosoftints(void);
109 struct cpu_info * const ci = curcpu();
110 if (ci->ci_intr_depth == 0
111 && (ci->ci_data.cpu_softints >> ci->ci_cpl) > 0)
112 dosoftints();
113 }
114
115 static __inline bool
cpu_intr_p(void)116 cpu_intr_p(void)
117 {
118 return curcpu()->ci_intr_depth > 0;
119 }
120
121 #endif /* _KERNEL || _KMEMUSER */
122
123 #endif /* _OR1K_CPU_H_ */
124