1 /* $NetBSD: cpu.h,v 1.4 2015/04/01 21:55:03 matt 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 _RISCV_CPU_H_
33 #define _RISCV_CPU_H_
34
35 #if defined(_KERNEL) || defined(_KMEMUSER)
36
37 struct clockframe {
38 uintptr_t cf_pc;
39 uint32_t cf_sr;
40 int cf_intr_depth;
41 };
42
43 #define CLKF_USERMODE(cf) (((cf)->cf_sr & 1) == 0)
44 #define CLKF_PC(cf) ((cf)->cf_pc)
45 #define CLKF_INTR(cf) ((cf)->cf_intr_depth > 0)
46
47 #include <sys/cpu_data.h>
48 #include <sys/device_if.h>
49 #include <sys/evcnt.h>
50 #include <sys/intr.h>
51
52 struct cpu_info {
53 struct cpu_data ci_data;
54 device_t ci_dev;
55 cpuid_t ci_cpuid;
56 struct lwp *ci_curlwp;
57 struct lwp *ci_softlwps[SOFTINT_COUNT];
58 struct trapframe *ci_ddb_regs;
59
60 uint64_t ci_lastintr;
61
62 int ci_mtx_oldspl;
63 int ci_mtx_count;
64
65 int ci_want_resched;
66 int ci_cpl;
67 u_int ci_softints;
68 volatile u_int ci_intr_depth;
69
70 tlb_asid_t ci_pmap_asid_cur;
71 #if 0
72 union pmap_pdetab *ci_pmap_user_pdetab;
73 #ifdef _LP64
74 union pmap_pdetab *ci_pmap_user_pde0tab;
75 #endif
76 #endif
77
78 struct evcnt ci_ev_fpu_saves;
79 struct evcnt ci_ev_fpu_loads;
80 struct evcnt ci_ev_fpu_reenables;
81 };
82
83 #endif /* _KERNEL || _KMEMUSER */
84
85 #ifdef _KERNEL
86
87 extern struct cpu_info cpu_info_store;
88
89 // This is also in <sys/lwp.h>
90 struct lwp;
91 static inline struct cpu_info *lwp_getcpu(struct lwp *);
92
93 register struct lwp *riscv_curlwp __asm("tp");
94 #define curlwp riscv_curlwp
95 #define curcpu() lwp_getcpu(curlwp)
96
97 static inline cpuid_t
cpu_number(void)98 cpu_number(void)
99 {
100 #ifdef MULTIPROCESSOR
101 return curcpu()->ci_cpuid;
102 #else
103 return 0;
104 #endif
105 }
106
107 void cpu_set_curpri(int);
108 void cpu_proc_fork(struct proc *, struct proc *);
109 void cpu_signotify(struct lwp *);
110 void cpu_need_proftick(struct lwp *l);
111 void cpu_boot_secondary_processors(void);
112
113 #define CPU_INFO_ITERATOR cpuid_t
114 #ifdef MULTIPROCESSOR
115 #define CPU_INFO_FOREACH(cii, ci) \
116 (cii) = 0; ((ci) = cpu_infos[cii]) != NULL; (cii)++
117 #else
118 #define CPU_INFO_FOREACH(cii, ci) \
119 (cii) = 0, (ci) = curcpu(); (cii) == 0; (cii)++
120 #endif
121
122 #define CPU_INFO_CURPMAP(ci) (curlwp->l_proc->p_vmspace->vm_map.pmap)
123
124 static inline void
cpu_dosoftints(void)125 cpu_dosoftints(void)
126 {
127 extern void dosoftints(void);
128 struct cpu_info * const ci = curcpu();
129 if (ci->ci_intr_depth == 0
130 && (ci->ci_data.cpu_softints >> ci->ci_cpl) > 0)
131 dosoftints();
132 }
133
134 static inline bool
cpu_intr_p(void)135 cpu_intr_p(void)
136 {
137 return curcpu()->ci_intr_depth > 0;
138 }
139
140 #define LWP_PC(l) cpu_lwp_pc(l)
141
142 vaddr_t cpu_lwp_pc(struct lwp *);
143
144 static inline void
cpu_idle(void)145 cpu_idle(void)
146 {
147 }
148
149 #endif /* _KERNEL */
150
151 #endif /* _RISCV_CPU_H_ */
152