cpu.h revision 1.76.2.1 1 /* $NetBSD: cpu.h,v 1.76.2.1 2011/06/23 14:18:52 cherry Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center, and by Charles M. Hannum.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1988 University of Utah.
35 * Copyright (c) 1982, 1990, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * This code is derived from software contributed to Berkeley by
39 * the Systems Programming Group of the University of Utah Computer
40 * Science Department.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * from: Utah $Hdr: cpu.h 1.16 91/03/25$
67 *
68 * @(#)cpu.h 8.4 (Berkeley) 1/5/94
69 */
70
71 #ifndef _ALPHA_CPU_H_
72 #define _ALPHA_CPU_H_
73
74 #if defined(_KERNEL_OPT)
75 #include "opt_multiprocessor.h"
76 #include "opt_lockdebug.h"
77 #endif
78
79 /*
80 * Exported definitions unique to Alpha cpu support.
81 */
82
83 #include <machine/alpha_cpu.h>
84
85 #if defined(_KERNEL) || defined(_KMEMUSER)
86 #include <sys/cpu_data.h>
87 #ifndef _KMEMUSER
88 #include <sys/cctr.h>
89 #include <machine/frame.h>
90 #endif
91
92 /*
93 * Machine check information.
94 */
95 struct mchkinfo {
96 volatile int mc_expected; /* machine check is expected */
97 volatile int mc_received; /* machine check was received */
98 };
99
100 struct cpu_info {
101 /*
102 * Private members accessed in assembly with 8 bit offsets.
103 */
104 struct lwp *ci_fpcurlwp; /* current owner of the FPU */
105 paddr_t ci_curpcb; /* PA of current HW PCB */
106
107 /*
108 * Public members.
109 */
110 struct lwp *ci_curlwp; /* current owner of the processor */
111 struct cpu_data ci_data; /* MI per-cpu data */
112 #ifndef _KMEMUSER
113 struct cctr_state ci_cc; /* cycle counter state */
114 struct cpu_info *ci_next; /* next cpu_info structure */
115 int ci_mtx_count;
116 int ci_mtx_oldspl;
117
118 /*
119 * Private members.
120 */
121 struct mchkinfo ci_mcinfo; /* machine check info */
122 cpuid_t ci_cpuid; /* our CPU ID */
123 struct cpu_softc *ci_softc; /* pointer to our device */
124 u_long ci_want_resched; /* preempt current process */
125 u_long ci_intrdepth; /* interrupt trap depth */
126 struct trapframe *ci_db_regs; /* registers for debuggers */
127 uint64_t ci_pcc_freq; /* cpu cycles/second */
128
129 #if defined(MULTIPROCESSOR)
130 volatile u_long ci_flags; /* flags; see below */
131 volatile u_long ci_ipis; /* interprocessor interrupts pending */
132 #endif
133 #endif /* _KMEMUSER */
134 };
135
136 #endif /* _KERNEL || _KMEMUSER */
137
138 #if defined(_KERNEL)
139
140 #define CPUF_PRIMARY 0x01 /* CPU is primary CPU */
141 #define CPUF_PRESENT 0x02 /* CPU is present */
142 #define CPUF_RUNNING 0x04 /* CPU is running */
143 #define CPUF_PAUSED 0x08 /* CPU is paused */
144 #define CPUF_FPUSAVE 0x10 /* CPU is currently in fpusave_cpu() */
145
146 extern struct cpu_info cpu_info_primary;
147 extern struct cpu_info *cpu_info_list;
148
149 #define CPU_INFO_ITERATOR int
150 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = cpu_info_list; \
151 ci != NULL; ci = ci->ci_next
152
153 #if defined(MULTIPROCESSOR)
154 extern volatile u_long cpus_running;
155 extern volatile u_long cpus_paused;
156 extern struct cpu_info *cpu_info[];
157
158 #define curcpu() ((struct cpu_info *)alpha_pal_rdval())
159 #define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CPUF_PRIMARY)
160
161 void cpu_boot_secondary_processors(void);
162
163 void cpu_pause_resume(unsigned long, int);
164 void cpu_pause_resume_all(int);
165 #else /* ! MULTIPROCESSOR */
166 #define curcpu() (&cpu_info_primary)
167 #endif /* MULTIPROCESSOR */
168
169 #define curlwp curcpu()->ci_curlwp
170 #define fpcurlwp curcpu()->ci_fpcurlwp
171 #define curpcb curcpu()->ci_curpcb
172
173 /*
174 * definitions of cpu-dependent requirements
175 * referenced in generic code
176 */
177 #define cpu_number() alpha_pal_whami()
178 #define cpu_proc_fork(p1, p2) /* nothing */
179
180 /*
181 * Arguments to hardclock and gatherstats encapsulate the previous
182 * machine state in an opaque clockframe. One the Alpha, we use
183 * what we push on an interrupt (a trapframe).
184 */
185 struct clockframe {
186 struct trapframe cf_tf;
187 };
188 #define CLKF_USERMODE(framep) \
189 (((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0)
190 #define CLKF_PC(framep) ((framep)->cf_tf.tf_regs[FRAME_PC])
191
192 /*
193 * This isn't perfect; if the clock interrupt comes in before the
194 * r/m/w cycle is complete, we won't be counted... but it's not
195 * like this stastic has to be extremely accurate.
196 */
197 #define CLKF_INTR(framep) (curcpu()->ci_intrdepth)
198
199 /*
200 * This is used during profiling to integrate system time. It can safely
201 * assume that the process is resident.
202 */
203 #define LWP_PC(p) ((l)->l_md.md_tf->tf_regs[FRAME_PC])
204
205 /*
206 * Give a profiling tick to the current process when the user profiling
207 * buffer pages are invalid. On the Alpha, request an AST to send us
208 * through trap, marking the proc as needing a profiling tick.
209 */
210 #define cpu_need_proftick(l) \
211 do { \
212 (l)->l_pflag |= LP_OWEUPC; \
213 aston(l); \
214 } while (/*CONSTCOND*/0)
215
216 /*
217 * Notify the current process (p) that it has a signal pending,
218 * process as soon as possible.
219 */
220 #define cpu_signotify(l) aston(l)
221
222 /*
223 * XXXSMP
224 * Should we send an AST IPI? Or just let it handle it next time
225 * it sees a normal kernel entry? I guess letting it happen later
226 * follows the `asynchronous' part of the name...
227 */
228 #define aston(l) ((l)->l_md.md_astpending = 1)
229 #endif /* _KERNEL */
230
231 /*
232 * CTL_MACHDEP definitions.
233 */
234 #define CPU_CONSDEV 1 /* dev_t: console terminal device */
235 #define CPU_ROOT_DEVICE 2 /* string: root device name */
236 #define CPU_UNALIGNED_PRINT 3 /* int: print unaligned accesses */
237 #define CPU_UNALIGNED_FIX 4 /* int: fix unaligned accesses */
238 #define CPU_UNALIGNED_SIGBUS 5 /* int: SIGBUS unaligned accesses */
239 #define CPU_BOOTED_KERNEL 6 /* string: booted kernel name */
240 #define CPU_FP_SYNC_COMPLETE 7 /* int: always fixup sync fp traps */
241 #define CPU_MAXID 8 /* 7 valid machdep IDs */
242
243 #ifdef _KERNEL
244
245 struct pcb;
246 struct proc;
247 struct reg;
248 struct rpb;
249 struct trapframe;
250
251 int badaddr(void *, size_t);
252 void * cpu_uarea_alloc(bool);
253 void cpu_uarea_free(void *);
254
255 #define cpu_idle() /* nothing */
256
257 #endif /* _KERNEL */
258 #endif /* _ALPHA_CPU_H_ */
259