1 /* $NetBSD: cpu.h,v 1.110 2020/03/29 09:06:38 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1996 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * RiscBSD kernel project 38 * 39 * cpu.h 40 * 41 * CPU specific symbols 42 * 43 * Created : 18/09/94 44 * 45 * Based on kate/katelib/arm6.h 46 */ 47 48 #ifndef _ARM_CPU_H_ 49 #define _ARM_CPU_H_ 50 51 #ifdef _KERNEL 52 #ifndef _LOCORE 53 54 typedef unsigned long mpidr_t; 55 56 #ifdef MULTIPROCESSOR 57 extern u_int arm_cpu_max; 58 extern mpidr_t cpu_mpidr[]; 59 extern kmutex_t cpu_hatch_lock; 60 61 void cpu_boot_secondary_processors(void); 62 void cpu_mpstart(void); 63 bool cpu_hatched_p(u_int); 64 65 void cpu_clr_mbox(int); 66 void cpu_set_hatched(int); 67 68 #endif 69 70 void cpu_proc_fork(struct proc *, struct proc *); 71 72 #endif /* !_LOCORE */ 73 #endif /* _KERNEL */ 74 75 #ifdef __arm__ 76 77 /* 78 * User-visible definitions 79 */ 80 81 /* CTL_MACHDEP definitions. */ 82 #define CPU_DEBUG 1 /* int: misc kernel debug control */ 83 #define CPU_BOOTED_DEVICE 2 /* string: device we booted from */ 84 #define CPU_BOOTED_KERNEL 3 /* string: kernel we booted */ 85 #define CPU_CONSDEV 4 /* struct: dev_t of our console */ 86 #define CPU_POWERSAVE 5 /* int: use CPU powersave mode */ 87 88 #if defined(_KERNEL) || defined(_KMEMUSER) 89 90 /* 91 * Kernel-only definitions 92 */ 93 94 #if !defined(_MODULE) && defined(_KERNEL_OPT) 95 #include "opt_multiprocessor.h" 96 #include "opt_cpuoptions.h" 97 #include "opt_lockdebug.h" 98 #include "opt_cputypes.h" 99 #endif /* !_MODULE && _KERNEL_OPT */ 100 101 #ifndef _LOCORE 102 #if defined(TPIDRPRW_IS_CURLWP) || defined(TPIDRPRW_IS_CURCPU) 103 #include <arm/armreg.h> 104 #endif /* TPIDRPRW_IS_CURLWP || TPIDRPRW_IS_CURCPU */ 105 106 /* 1 == use cpu_sleep(), 0 == don't */ 107 extern int cpu_do_powersave; 108 extern int cpu_fpu_present; 109 110 /* All the CLKF_* macros take a struct clockframe * as an argument. */ 111 112 /* 113 * CLKF_USERMODE: Return TRUE/FALSE (1/0) depending on whether the 114 * frame came from USR mode or not. 115 */ 116 #define CLKF_USERMODE(cf) (((cf)->cf_tf.tf_spsr & PSR_MODE) == PSR_USR32_MODE) 117 118 /* 119 * CLKF_INTR: True if we took the interrupt from inside another 120 * interrupt handler. 121 */ 122 #if !defined(__ARM_EABI__) 123 /* Hack to treat FPE time as interrupt time so we can measure it */ 124 #define CLKF_INTR(cf) \ 125 ((curcpu()->ci_intr_depth > 1) || \ 126 ((cf)->cf_tf.tf_spsr & PSR_MODE) == PSR_UND32_MODE) 127 #else 128 #define CLKF_INTR(cf) ((void)(cf), curcpu()->ci_intr_depth > 1) 129 #endif 130 131 /* 132 * CLKF_PC: Extract the program counter from a clockframe 133 */ 134 #define CLKF_PC(frame) (frame->cf_tf.tf_pc) 135 136 /* 137 * LWP_PC: Find out the program counter for the given lwp. 138 */ 139 #define LWP_PC(l) (lwp_trapframe(l)->tf_pc) 140 141 /* 142 * Per-CPU information. For now we assume one CPU. 143 */ 144 #ifdef _KERNEL 145 static inline int curcpl(void); 146 static inline void set_curcpl(int); 147 static inline void cpu_dosoftints(void); 148 #endif 149 150 #ifdef _KMEMUSER 151 #include <sys/intr.h> 152 #endif 153 #include <sys/atomic.h> 154 #include <sys/cpu_data.h> 155 #include <sys/device_if.h> 156 #include <sys/evcnt.h> 157 158 struct cpu_info { 159 struct cpu_data ci_data; /* MI per-cpu data */ 160 device_t ci_dev; /* Device corresponding to this CPU */ 161 cpuid_t ci_cpuid; 162 uint32_t ci_arm_cpuid; /* aggregate CPU id */ 163 uint32_t ci_arm_cputype; /* CPU type */ 164 uint32_t ci_arm_cpurev; /* CPU revision */ 165 uint32_t ci_ctrl; /* The CPU control register */ 166 int ci_cpl; /* current processor level (spl) */ 167 volatile int ci_astpending; /* */ 168 int ci_want_resched;/* resched() was called */ 169 int ci_intr_depth; /* */ 170 171 struct cpu_softc * 172 ci_softc; /* platform softc */ 173 174 lwp_t * ci_softlwps[SOFTINT_COUNT]; 175 volatile uint32_t 176 ci_softints; 177 178 lwp_t * ci_curlwp; /* current lwp */ 179 lwp_t * ci_onproc; /* current user LWP / kthread */ 180 lwp_t * ci_lastlwp; /* last lwp */ 181 182 struct evcnt ci_arm700bugcount; 183 int32_t ci_mtx_count; 184 int ci_mtx_oldspl; 185 register_t ci_undefsave[3]; 186 uint32_t ci_vfp_id; 187 uint64_t ci_lastintr; 188 189 struct pmap_tlb_info * 190 ci_tlb_info; 191 struct pmap * ci_pmap_lastuser; 192 struct pmap * ci_pmap_cur; 193 tlb_asid_t ci_pmap_asid_cur; 194 195 struct trapframe * 196 ci_ddb_regs; 197 198 struct evcnt ci_abt_evs[16]; 199 struct evcnt ci_und_ev; 200 struct evcnt ci_und_cp15_ev; 201 struct evcnt ci_vfp_evs[3]; 202 203 uint32_t ci_midr; 204 uint32_t ci_mpidr; 205 uint32_t ci_capacity_dmips_mhz; 206 207 struct arm_cache_info * 208 ci_cacheinfo; 209 210 #if defined(MP_CPU_INFO_MEMBERS) 211 MP_CPU_INFO_MEMBERS 212 #endif 213 }; 214 215 extern struct cpu_info cpu_info_store[]; 216 217 struct lwp *arm_curlwp(void); 218 struct cpu_info *arm_curcpu(void); 219 220 #ifdef _KERNEL 221 #if defined(_MODULE) 222 223 #define curlwp arm_curlwp() 224 #define curcpu() arm_curcpu() 225 226 #elif defined(TPIDRPRW_IS_CURLWP) 227 static inline struct lwp * 228 _curlwp(void) 229 { 230 return (struct lwp *) armreg_tpidrprw_read(); 231 } 232 233 static inline void 234 _curlwp_set(struct lwp *l) 235 { 236 armreg_tpidrprw_write((uintptr_t)l); 237 } 238 239 // Also in <sys/lwp.h> but also here if this was included before <sys/lwp.h> 240 static inline struct cpu_info *lwp_getcpu(struct lwp *); 241 242 #define curlwp _curlwp() 243 // curcpu() expands into two instructions: a mrc and a ldr 244 #define curcpu() lwp_getcpu(_curlwp()) 245 #elif defined(TPIDRPRW_IS_CURCPU) 246 #ifdef __HAVE_PREEMPTION 247 #error __HAVE_PREEMPTION requires TPIDRPRW_IS_CURLWP 248 #endif 249 static inline struct cpu_info * 250 curcpu(void) 251 { 252 return (struct cpu_info *) armreg_tpidrprw_read(); 253 } 254 #elif !defined(MULTIPROCESSOR) 255 #define curcpu() (&cpu_info_store[0]) 256 #elif !defined(__HAVE_PREEMPTION) 257 #error MULTIPROCESSOR && !__HAVE_PREEMPTION requires TPIDRPRW_IS_CURCPU or TPIDRPRW_IS_CURLWP 258 #else 259 #error MULTIPROCESSOR && __HAVE_PREEMPTION requires TPIDRPRW_IS_CURLWP 260 #endif /* !TPIDRPRW_IS_CURCPU && !TPIDRPRW_IS_CURLWP */ 261 262 #ifndef curlwp 263 #define curlwp (curcpu()->ci_curlwp) 264 #endif 265 #define curpcb ((struct pcb *)lwp_getpcb(curlwp)) 266 267 #define CPU_INFO_ITERATOR int 268 #if defined(_MODULE) || defined(MULTIPROCESSOR) 269 extern struct cpu_info *cpu_info[]; 270 #define cpu_number() (curcpu()->ci_index) 271 #define CPU_IS_PRIMARY(ci) ((ci)->ci_index == 0) 272 #define CPU_INFO_FOREACH(cii, ci) \ 273 cii = 0, ci = cpu_info[0]; cii < (ncpu ? ncpu : 1) && (ci = cpu_info[cii]) != NULL; cii++ 274 #else 275 #define cpu_number() 0 276 277 #define CPU_IS_PRIMARY(ci) true 278 #define CPU_INFO_FOREACH(cii, ci) \ 279 cii = 0, __USE(cii), ci = curcpu(); ci != NULL; ci = NULL 280 #endif 281 282 #if defined(MULTIPROCESSOR) 283 void cpu_init_secondary_processor(int); 284 #endif 285 286 #define LWP0_CPU_INFO (&cpu_info_store[0]) 287 288 static inline int 289 curcpl(void) 290 { 291 return curcpu()->ci_cpl; 292 } 293 294 static inline void 295 set_curcpl(int pri) 296 { 297 curcpu()->ci_cpl = pri; 298 } 299 300 static inline void 301 cpu_dosoftints(void) 302 { 303 #ifdef __HAVE_FAST_SOFTINTS 304 void dosoftints(void); 305 #ifndef __HAVE_PIC_FAST_SOFTINTS 306 struct cpu_info * const ci = curcpu(); 307 if (ci->ci_intr_depth == 0 && (ci->ci_softints >> ci->ci_cpl) > 0) 308 dosoftints(); 309 #endif 310 #endif 311 } 312 313 /* 314 * Scheduling glue 315 */ 316 317 #ifdef __HAVE_PREEMPTION 318 #define setsoftast(ci) atomic_or_uint(&(ci)->ci_astpending, __BIT(0)) 319 #else 320 #define setsoftast(ci) ((ci)->ci_astpending = __BIT(0)) 321 #endif 322 323 /* 324 * Notify the current process (p) that it has a signal pending, 325 * process as soon as possible. 326 */ 327 328 #define cpu_signotify(l) setsoftast((l)->l_cpu) 329 330 /* 331 * Give a profiling tick to the current process when the user profiling 332 * buffer pages are invalid. On the i386, request an ast to send us 333 * through trap(), marking the proc as needing a profiling tick. 334 */ 335 #define cpu_need_proftick(l) ((l)->l_pflag |= LP_OWEUPC, \ 336 setsoftast((l)->l_cpu)) 337 338 /* 339 * We've already preallocated the stack for the idlelwps for additional CPUs. 340 * This hook allows to return them. 341 */ 342 vaddr_t cpu_uarea_alloc_idlelwp(struct cpu_info *); 343 344 #ifdef _ARM_ARCH_6 345 int cpu_maxproc_hook(int); 346 #endif 347 348 #endif /* _KERNEL */ 349 350 #endif /* !_LOCORE */ 351 352 #endif /* _KERNEL || _KMEMUSER */ 353 354 #elif defined(__aarch64__) 355 356 #include <aarch64/cpu.h> 357 358 #endif /* __arm__/__aarch64__ */ 359 360 #endif /* !_ARM_CPU_H_ */ 361