1 /* $NetBSD: cpu.h,v 1.106 2024/03/31 17:13:29 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_gprof.h" 76 #include "opt_multiprocessor.h" 77 #include "opt_lockdebug.h" 78 #endif 79 80 /* 81 * Exported definitions unique to Alpha cpu support. 82 */ 83 84 #include <machine/alpha_cpu.h> 85 86 #if defined(_KERNEL) || defined(_KMEMUSER) 87 #include <sys/cpu_data.h> 88 #include <sys/cctr.h> 89 #include <sys/intr.h> 90 #include <machine/frame.h> 91 92 #ifndef _KERNEL 93 #include <stddef.h> 94 #endif /* ! _KERNEL */ 95 96 /* 97 * Machine check information. 98 */ 99 struct mchkinfo { 100 volatile int mc_expected; /* machine check is expected */ 101 volatile int mc_received; /* machine check was received */ 102 }; 103 104 /* 105 * Per-cpu information. Data accessed by MI code is marked [MI]. 106 */ 107 struct cpu_info { 108 struct cpu_data ci_data; /* [MI] general per-cpu data */ 109 struct lwp *ci_curlwp; /* [MI] current owner of the cpu */ 110 struct lwp *ci_onproc; /* [MI] current user LWP / kthread */ 111 struct cctr_state ci_cc; /* [MI] cycle counter state */ 112 113 volatile int ci_mtx_count; /* [MI] neg count of spin mutexes */ 114 volatile int ci_mtx_oldspl; /* [MI] for spin mutex splx() */ 115 116 u_long ci_intrdepth; /* interrupt trap depth */ 117 volatile u_long ci_ssir; /* simulated software interrupt reg */ 118 /* LWPs for soft intr dispatch */ 119 struct lwp *ci_silwps[SOFTINT_COUNT]; 120 struct cpu_softc *ci_softc; /* pointer to our device */ 121 122 struct pmap *ci_pmap; /* currently-activated pmap */ 123 u_int ci_next_asn; /* next ASN to assign */ 124 u_long ci_asn_gen; /* current ASN generation */ 125 126 struct mchkinfo ci_mcinfo; /* machine check info */ 127 128 /* 129 * The following must be in their own cache line, as they are 130 * stored to regularly by remote CPUs. 131 */ 132 volatile u_long ci_ipis /* interprocessor interrupts pending */ 133 __aligned(64); 134 u_int ci_want_resched; /* [MI] preempt current process */ 135 136 /* 137 * These are largely static, and will frequently be fetched 138 * by other CPUs. For that reason, they get their own cache 139 * line, too. 140 */ 141 struct cpu_info *ci_next /* next cpu_info structure */ 142 __aligned(64); 143 cpuid_t ci_cpuid; /* [MI] our CPU ID */ 144 volatile u_long ci_flags; /* flags; see below */ 145 uint64_t ci_pcc_freq; /* cpu cycles/second */ 146 struct trapframe *ci_db_regs; /* registers for debuggers */ 147 u_int ci_nintrhand; /* # of interrupt handlers */ 148 #if defined(GPROF) && defined(MULTIPROCESSOR) 149 struct gmonparam *ci_gmon; /* [MI] per-cpu GPROF */ 150 #endif 151 }; 152 153 /* Ensure some cpu_info fields are within the signed 16-bit displacement. */ 154 __CTASSERT(offsetof(struct cpu_info, ci_curlwp) <= 0x7ff0); 155 __CTASSERT(offsetof(struct cpu_info, ci_ssir) <= 0x7ff0); 156 157 #endif /* _KERNEL || _KMEMUSER */ 158 159 #if defined(_KERNEL) 160 161 #define CPUF_PRIMARY 0x01 /* CPU is primary CPU */ 162 #define CPUF_PRESENT 0x02 /* CPU is present */ 163 #define CPUF_RUNNING 0x04 /* CPU is running */ 164 #define CPUF_PAUSED 0x08 /* CPU is paused */ 165 166 extern struct cpu_info cpu_info_primary; 167 extern struct cpu_info *cpu_info_list; 168 169 #define CPU_INFO_ITERATOR int __unused 170 #define CPU_INFO_FOREACH(cii, ci) ci = cpu_info_list; \ 171 ci != NULL; ci = ci->ci_next 172 173 #if defined(MULTIPROCESSOR) 174 extern volatile u_long cpus_running; 175 extern volatile u_long cpus_paused; 176 extern struct cpu_info *cpu_info[]; 177 178 #define curlwp ((struct lwp *)alpha_pal_rdval()) 179 #define curcpu() curlwp->l_cpu 180 #define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CPUF_PRIMARY) 181 182 void cpu_boot_secondary_processors(void); 183 184 void cpu_pause_resume(unsigned long, int); 185 void cpu_pause_resume_all(int); 186 #else /* ! MULTIPROCESSOR */ 187 #define curcpu() (&cpu_info_primary) 188 #define curlwp curcpu()->ci_curlwp 189 #endif /* MULTIPROCESSOR */ 190 191 192 /* 193 * definitions of cpu-dependent requirements 194 * referenced in generic code 195 */ 196 #define cpu_number() alpha_pal_whami() 197 #define cpu_proc_fork(p1, p2) /* nothing */ 198 199 /* 200 * Arguments to hardclock and gatherstats encapsulate the previous 201 * machine state in an opaque clockframe. On the alpha, we use 202 * what we push on an interrupt (a trapframe). 203 */ 204 struct clockframe { 205 struct trapframe cf_tf; 206 }; 207 #define CLKF_USERMODE(framep) \ 208 (((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0) 209 #define CLKF_PC(framep) ((framep)->cf_tf.tf_regs[FRAME_PC]) 210 211 /* 212 * This isn't perfect; if the clock interrupt comes in before the 213 * r/m/w cycle is complete, we won't be counted... but it's not 214 * like this statistic has to be extremely accurate. 215 */ 216 #define CLKF_INTR(framep) \ 217 ((curcpu()->ci_intrdepth & 0xf) != 0) /* see interrupt() */ 218 219 /* 220 * This is used during profiling to integrate system time. It can safely 221 * assume that the process is resident. 222 */ 223 #define LWP_PC(p) ((l)->l_md.md_tf->tf_regs[FRAME_PC]) 224 225 void cpu_need_proftick(struct lwp *); 226 void cpu_signotify(struct lwp *); 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_CCTR 8 /* int: using CC timecounter */ 242 #define CPU_IS_QEMU 9 /* int: running under Qemu */ 243 #define CPU_FP_COMPLETE_DEBUG 10 /* int: enable FP completion debug */ 244 #define CPU_RPB_TYPE 11 /* quad: system type (from RPB) */ 245 #define CPU_RPB_VARIATION 12 /* quad: system variation (from RPB) */ 246 247 248 #ifdef _KERNEL 249 250 struct pcb; 251 struct proc; 252 struct reg; 253 struct rpb; 254 struct trapframe; 255 256 int badaddr(void *, size_t); 257 void * cpu_uarea_alloc(bool); 258 bool cpu_uarea_free(void *); 259 260 void cpu_idle_wtint(void); 261 extern void (*cpu_idle_fn)(void); 262 #define cpu_idle() (*cpu_idle_fn)() 263 264 void cpu_initclocks_secondary(void); 265 266 #endif /* _KERNEL */ 267 #endif /* _ALPHA_CPU_H_ */ 268