1 /* $NetBSD: cpu.h,v 1.132 2021/03/29 01:47:45 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell and Rick Macklem. 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 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cpu.h 8.4 (Berkeley) 1/4/94 35 */ 36 37 #ifndef _CPU_H_ 38 #define _CPU_H_ 39 40 /* 41 * Exported definitions unique to NetBSD/mips cpu support. 42 */ 43 44 #ifdef _LOCORE 45 #error Use assym.h to get definitions from <mips/cpu.h> 46 #endif 47 48 #if defined(_KERNEL) || defined(_KMEMUSER) 49 50 #if defined(_KERNEL_OPT) 51 #include "opt_cputype.h" 52 #include "opt_lockdebug.h" 53 #include "opt_multiprocessor.h" 54 #endif 55 56 #include <mips/frame.h> 57 58 #include <sys/cpu_data.h> 59 #include <sys/device_if.h> 60 #include <sys/evcnt.h> 61 #include <sys/kcpuset.h> 62 #include <sys/intr.h> 63 64 typedef struct cpu_watchpoint { 65 register_t cw_addr; 66 register_t cw_mask; 67 uint32_t cw_asid; 68 uint32_t cw_mode; 69 } cpu_watchpoint_t; 70 71 /* (abstract) mode bits */ 72 #define CPUWATCH_WRITE __BIT(0) 73 #define CPUWATCH_READ __BIT(1) 74 #define CPUWATCH_EXEC __BIT(2) 75 #define CPUWATCH_MASK __BIT(3) 76 #define CPUWATCH_ASID __BIT(4) 77 #define CPUWATCH_RWX (CPUWATCH_EXEC|CPUWATCH_READ|CPUWATCH_WRITE) 78 79 #define CPUWATCH_MAX 8 /* max possible number of watchpoints */ 80 81 u_int cpuwatch_discover(void); 82 void cpuwatch_free(cpu_watchpoint_t *); 83 cpu_watchpoint_t *cpuwatch_alloc(void); 84 void cpuwatch_set_all(void); 85 void cpuwatch_clr_all(void); 86 void cpuwatch_set(cpu_watchpoint_t *); 87 void cpuwatch_clr(cpu_watchpoint_t *); 88 89 struct cpu_info { 90 struct cpu_data ci_data; /* MI per-cpu data */ 91 void *ci_nmi_stack; /* NMI exception stack */ 92 struct cpu_softc *ci_softc; /* chip-dependent hook */ 93 device_t ci_dev; /* owning device */ 94 cpuid_t ci_cpuid; /* Machine-level identifier */ 95 u_long ci_cctr_freq; /* cycle counter frequency */ 96 u_long ci_cpu_freq; /* CPU frequency */ 97 u_long ci_cycles_per_hz; /* CPU freq / hz */ 98 u_long ci_divisor_delay; /* for delay/DELAY */ 99 u_long ci_divisor_recip; /* unused, for obsolete microtime(9) */ 100 struct lwp *ci_curlwp; /* currently running lwp */ 101 struct lwp *ci_onproc; /* current user LWP / kthread */ 102 volatile int ci_want_resched; /* user preemption pending */ 103 int ci_mtx_count; /* negative count of held mutexes */ 104 int ci_mtx_oldspl; /* saved SPL value */ 105 int ci_idepth; /* hardware interrupt depth */ 106 int ci_cpl; /* current [interrupt] priority level */ 107 uint32_t ci_next_cp0_clk_intr; /* for hard clock intr scheduling */ 108 struct evcnt ci_ev_count_compare; /* hard clock intr counter */ 109 struct evcnt ci_ev_count_compare_missed; /* hard clock miss counter */ 110 struct lwp *ci_softlwps[SOFTINT_COUNT]; 111 volatile u_int ci_softints; 112 struct evcnt ci_ev_fpu_loads; /* fpu load counter */ 113 struct evcnt ci_ev_fpu_saves; /* fpu save counter */ 114 struct evcnt ci_ev_dsp_loads; /* dsp load counter */ 115 struct evcnt ci_ev_dsp_saves; /* dsp save counter */ 116 struct evcnt ci_ev_tlbmisses; 117 118 /* 119 * Per-cpu pmap information 120 */ 121 int ci_tlb_slot; /* reserved tlb entry for cpu_info */ 122 u_int ci_pmap_asid_cur; /* current ASID */ 123 struct pmap_tlb_info *ci_tlb_info; /* tlb information for this cpu */ 124 union pmap_segtab *ci_pmap_segtabs[2]; 125 #define ci_pmap_user_segtab ci_pmap_segtabs[0] 126 #define ci_pmap_kern_segtab ci_pmap_segtabs[1] 127 #ifdef _LP64 128 union pmap_segtab *ci_pmap_seg0tabs[2]; 129 #define ci_pmap_user_seg0tab ci_pmap_seg0tabs[0] 130 #define ci_pmap_kern_seg0tab ci_pmap_seg0tabs[1] 131 #endif 132 vaddr_t ci_pmap_srcbase; /* starting VA of ephemeral src space */ 133 vaddr_t ci_pmap_dstbase; /* starting VA of ephemeral dst space */ 134 135 u_int ci_cpuwatch_count; /* number of watchpoints on this CPU */ 136 cpu_watchpoint_t ci_cpuwatch_tab[CPUWATCH_MAX]; 137 138 #ifdef MULTIPROCESSOR 139 volatile u_long ci_flags; 140 volatile uint64_t ci_request_ipis; 141 /* bitmask of IPIs requested */ 142 /* use on chips where hw cannot pass tag */ 143 uint64_t ci_active_ipis; /* bitmask of IPIs being serviced */ 144 uint32_t ci_ksp_tlb_slot; /* tlb entry for kernel stack */ 145 struct evcnt ci_evcnt_all_ipis; /* aggregated IPI counter */ 146 struct evcnt ci_evcnt_per_ipi[NIPIS]; /* individual IPI counters*/ 147 struct evcnt ci_evcnt_synci_activate_rqst; 148 struct evcnt ci_evcnt_synci_onproc_rqst; 149 struct evcnt ci_evcnt_synci_deferred_rqst; 150 struct evcnt ci_evcnt_synci_ipi_rqst; 151 152 #define CPUF_PRIMARY 0x01 /* CPU is primary CPU */ 153 #define CPUF_PRESENT 0x02 /* CPU is present */ 154 #define CPUF_RUNNING 0x04 /* CPU is running */ 155 #define CPUF_PAUSED 0x08 /* CPU is paused */ 156 #define CPUF_USERPMAP 0x20 /* CPU has a user pmap activated */ 157 kcpuset_t *ci_shootdowncpus; 158 kcpuset_t *ci_multicastcpus; 159 kcpuset_t *ci_watchcpus; 160 kcpuset_t *ci_ddbcpus; 161 #endif 162 163 }; 164 #endif /* _KERNEL || _KMEMUSER */ 165 166 #ifdef _KERNEL 167 168 #ifdef MULTIPROCESSOR 169 #define CPU_INFO_ITERATOR int 170 #define CPU_INFO_FOREACH(cii, ci) \ 171 cii = 0, ci = &cpu_info_store; \ 172 ci != NULL; \ 173 cii++, \ 174 ncpu ? (ci = cpu_infos[cii]) \ 175 : (ci = NULL) 176 #else 177 #define CPU_INFO_ITERATOR int __unused 178 #define CPU_INFO_FOREACH(cii, ci) \ 179 ci = &cpu_info_store; ci != NULL; ci = NULL 180 #endif 181 182 /* Note: must be kept in sync with -ffixed-?? Makefile.mips. */ 183 // MIPS_CURLWP moved to <mips/regdef.h> 184 #define MIPS_CURLWP_QUOTED "$24" 185 #define MIPS_CURLWP_LABEL _L_T8 186 #define MIPS_CURLWP_REG _R_T8 187 188 extern struct cpu_info cpu_info_store; 189 #ifdef MULTIPROCESSOR 190 extern struct cpu_info *cpuid_infos[]; 191 #endif 192 register struct lwp *mips_curlwp asm(MIPS_CURLWP_QUOTED); 193 194 #define curlwp mips_curlwp 195 #define curcpu() lwp_getcpu(curlwp) 196 #define curpcb ((struct pcb *)lwp_getpcb(curlwp)) 197 #ifdef MULTIPROCESSOR 198 #define cpu_number() (curcpu()->ci_index) 199 #define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CPUF_PRIMARY) 200 #else 201 #define cpu_number() (0) 202 #define CPU_IS_PRIMARY(ci) (true) 203 #endif 204 205 /* 206 * definitions of cpu-dependent requirements 207 * referenced in generic code 208 */ 209 210 /* 211 * Send an inter-processor interrupt to each other CPU (excludes curcpu()) 212 */ 213 void cpu_broadcast_ipi(int); 214 215 /* 216 * Send an inter-processor interrupt to CPUs in kcpuset (excludes curcpu()) 217 */ 218 void cpu_multicast_ipi(const kcpuset_t *, int); 219 220 /* 221 * Send an inter-processor interrupt to another CPU. 222 */ 223 int cpu_send_ipi(struct cpu_info *, int); 224 225 /* 226 * cpu_intr(ppl, pc, status); (most state needed by clockframe) 227 */ 228 void cpu_intr(int, vaddr_t, uint32_t); 229 230 /* 231 * Arguments to hardclock and gatherstats encapsulate the previous 232 * machine state in an opaque clockframe. 233 */ 234 struct clockframe { 235 vaddr_t pc; /* program counter at time of interrupt */ 236 uint32_t sr; /* status register at time of interrupt */ 237 bool intr; /* interrupted a interrupt */ 238 }; 239 240 /* 241 * A port must provde CLKF_USERMODE() for use in machine-independent code. 242 * These differ on r4000 and r3000 systems; provide them in the 243 * port-dependent file that includes this one, using the macros below. 244 */ 245 uint32_t cpu_clkf_usermode_mask(void); 246 247 #define CLKF_USERMODE(framep) ((framep)->sr & cpu_clkf_usermode_mask()) 248 #define CLKF_PC(framep) ((framep)->pc + 0) 249 #define CLKF_INTR(framep) ((framep)->intr + 0) 250 251 /* 252 * Misc prototypes and variable declarations. 253 */ 254 #define LWP_PC(l) cpu_lwp_pc(l) 255 256 struct proc; 257 struct lwp; 258 struct pcb; 259 struct reg; 260 261 /* 262 * Notify the current lwp (l) that it has a signal pending, 263 * process as soon as possible. 264 */ 265 void cpu_signotify(struct lwp *); 266 267 /* 268 * Give a profiling tick to the current process when the user profiling 269 * buffer pages are invalid. On the MIPS, request an ast to send us 270 * through trap, marking the proc as needing a profiling tick. 271 */ 272 void cpu_need_proftick(struct lwp *); 273 274 /* VM related hooks */ 275 void cpu_boot_secondary_processors(void); 276 void * cpu_uarea_alloc(bool); 277 bool cpu_uarea_free(void *); 278 void cpu_proc_fork(struct proc *, struct proc *); 279 vaddr_t cpu_lwp_pc(struct lwp *); 280 #ifdef _LP64 281 void cpu_vmspace_exec(struct lwp *, vaddr_t, vaddr_t); 282 #endif 283 284 #endif /* _KERNEL */ 285 286 /* 287 * CTL_MACHDEP definitions. 288 */ 289 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 290 #define CPU_BOOTED_KERNEL 2 /* string: booted kernel name */ 291 #define CPU_ROOT_DEVICE 3 /* string: root device name */ 292 #define CPU_LLSC 4 /* OS/CPU supports LL/SC instruction */ 293 #define CPU_LMMI 5 /* Loongson multimedia instructions */ 294 295 #endif /* _CPU_H_ */ 296