cpu.h revision 1.93
1 /* $NetBSD: cpu.h,v 1.93 2020/09/04 03:53:12 thorpej 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 #include <sys/cctr.h> 88 #include <machine/frame.h> 89 90 /* 91 * Machine check information. 92 */ 93 struct mchkinfo { 94 volatile int mc_expected; /* machine check is expected */ 95 volatile int mc_received; /* machine check was received */ 96 }; 97 98 /* 99 * Per-cpu information. Data accessed by MI code is marked [MI]. 100 */ 101 struct cpu_info { 102 struct lwp *ci_curlwp; /* [MI] current owner of the cpu */ 103 struct lwp *ci_onproc; /* [MI] current user LWP / kthread */ 104 struct cpu_data ci_data; /* [MI] general per-cpu data */ 105 struct cctr_state ci_cc; /* [MI] cycle counter state */ 106 107 volatile int ci_mtx_count; /* [MI] neg count of spin mutexes */ 108 volatile int ci_mtx_oldspl; /* [MI] for spin mutex splx() */ 109 110 u_long ci_intrdepth; /* interrupt trap depth */ 111 struct cpu_softc *ci_softc; /* pointer to our device */ 112 113 struct pmap *ci_pmap; /* currently-activated pmap */ 114 u_int ci_next_asn; /* next ASN to assign */ 115 u_long ci_asn_gen; /* current ASN generation */ 116 117 struct mchkinfo ci_mcinfo; /* machine check info */ 118 119 /* 120 * The following must be in their own cache line, as they are 121 * stored to regularly by remote CPUs. 122 */ 123 volatile u_long ci_ipis /* interprocessor interrupts pending */ 124 __aligned(64); 125 u_int ci_want_resched; /* [MI] preempt current process */ 126 127 /* 128 * These are largely static, and will frequently be fetched 129 * by other CPUs. For that reason, they get their own cache 130 * line, too. 131 */ 132 struct cpu_info *ci_next /* next cpu_info structure */ 133 __aligned(64); 134 cpuid_t ci_cpuid; /* [MI] our CPU ID */ 135 volatile u_long ci_flags; /* flags; see below */ 136 uint64_t ci_pcc_freq; /* cpu cycles/second */ 137 struct trapframe *ci_db_regs; /* registers for debuggers */ 138 }; 139 140 /* Ensure cpu_info::ci_curlwp is within the signed 16-bit displacement. */ 141 __CTASSERT(offsetof(struct cpu_info, ci_curlwp) <= 0x7ff0); 142 143 #endif /* _KERNEL || _KMEMUSER */ 144 145 #if defined(_KERNEL) 146 147 #define CPUF_PRIMARY 0x01 /* CPU is primary CPU */ 148 #define CPUF_PRESENT 0x02 /* CPU is present */ 149 #define CPUF_RUNNING 0x04 /* CPU is running */ 150 #define CPUF_PAUSED 0x08 /* CPU is paused */ 151 152 extern struct cpu_info cpu_info_primary; 153 extern struct cpu_info *cpu_info_list; 154 155 #define CPU_INFO_ITERATOR int __unused 156 #define CPU_INFO_FOREACH(cii, ci) ci = cpu_info_list; \ 157 ci != NULL; ci = ci->ci_next 158 159 #if defined(MULTIPROCESSOR) 160 extern volatile u_long cpus_running; 161 extern volatile u_long cpus_paused; 162 extern struct cpu_info *cpu_info[]; 163 164 #define curlwp ((struct lwp *)alpha_pal_rdval()) 165 #define curcpu() curlwp->l_cpu 166 #define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CPUF_PRIMARY) 167 168 void cpu_boot_secondary_processors(void); 169 170 void cpu_pause_resume(unsigned long, int); 171 void cpu_pause_resume_all(int); 172 #else /* ! MULTIPROCESSOR */ 173 #define curcpu() (&cpu_info_primary) 174 #define curlwp curcpu()->ci_curlwp 175 #endif /* MULTIPROCESSOR */ 176 177 178 /* 179 * definitions of cpu-dependent requirements 180 * referenced in generic code 181 */ 182 #define cpu_number() alpha_pal_whami() 183 #define cpu_proc_fork(p1, p2) /* nothing */ 184 185 /* 186 * Arguments to hardclock and gatherstats encapsulate the previous 187 * machine state in an opaque clockframe. On the alpha, we use 188 * what we push on an interrupt (a trapframe). 189 */ 190 struct clockframe { 191 struct trapframe cf_tf; 192 }; 193 #define CLKF_USERMODE(framep) \ 194 (((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0) 195 #define CLKF_PC(framep) ((framep)->cf_tf.tf_regs[FRAME_PC]) 196 197 /* 198 * This isn't perfect; if the clock interrupt comes in before the 199 * r/m/w cycle is complete, we won't be counted... but it's not 200 * like this stastic has to be extremely accurate. 201 */ 202 #define CLKF_INTR(framep) (curcpu()->ci_intrdepth) 203 204 /* 205 * This is used during profiling to integrate system time. It can safely 206 * assume that the process is resident. 207 */ 208 #define LWP_PC(p) ((l)->l_md.md_tf->tf_regs[FRAME_PC]) 209 210 void cpu_need_proftick(struct lwp *); 211 void cpu_signotify(struct lwp *); 212 213 #define aston(l) ((l)->l_md.md_astpending = 1) 214 #endif /* _KERNEL */ 215 216 /* 217 * CTL_MACHDEP definitions. 218 */ 219 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 220 #define CPU_ROOT_DEVICE 2 /* string: root device name */ 221 #define CPU_UNALIGNED_PRINT 3 /* int: print unaligned accesses */ 222 #define CPU_UNALIGNED_FIX 4 /* int: fix unaligned accesses */ 223 #define CPU_UNALIGNED_SIGBUS 5 /* int: SIGBUS unaligned accesses */ 224 #define CPU_BOOTED_KERNEL 6 /* string: booted kernel name */ 225 #define CPU_FP_SYNC_COMPLETE 7 /* int: always fixup sync fp traps */ 226 227 #ifdef _KERNEL 228 229 struct pcb; 230 struct proc; 231 struct reg; 232 struct rpb; 233 struct trapframe; 234 235 int badaddr(void *, size_t); 236 void * cpu_uarea_alloc(bool); 237 bool cpu_uarea_free(void *); 238 239 #define cpu_idle() /* nothing */ 240 241 #endif /* _KERNEL */ 242 #endif /* _ALPHA_CPU_H_ */ 243
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