1 /* $OpenBSD: cpu.h,v 1.57 2020/01/12 16:55:00 kettenis Exp $ */ 2 /* $NetBSD: cpu.h,v 1.34 2003/06/23 11:01:08 martin Exp $ */ 3 4 /* 5 * Copyright (c) 1994-1996 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Brini. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * RiscBSD kernel project 39 * 40 * cpu.h 41 * 42 * CPU specific symbols 43 * 44 * Created : 18/09/94 45 * 46 * Based on kate/katelib/arm6.h 47 */ 48 49 #ifndef _ARM_CPU_H_ 50 #define _ARM_CPU_H_ 51 52 /* 53 * User-visible definitions 54 */ 55 56 /* CTL_MACHDEP definitions. */ 57 /* 1 formerly int: CPU_DEBUG */ 58 /* 2 formerly string: CPU_BOOTED_DEVICE */ 59 /* 3 formerly string: CPU_BOOTED_KERNEL */ 60 #define CPU_CONSDEV 4 /* struct: dev_t of our console */ 61 #define CPU_POWERSAVE 5 /* int: use CPU powersave mode */ 62 #define CPU_ALLOWAPERTURE 6 /* int: allow mmap of /dev/xf86 */ 63 /* 7 formerly int: apmwarn */ 64 /* 8 formerly int: keyboard reset */ 65 /* 9 formerly int: CPU_ZTSRAWMODE */ 66 /* 10 formerly struct: CPU_ZTSSCALE */ 67 #define CPU_MAXSPEED 11 /* int: number of valid machdep ids */ 68 /* 12 formerly int: CPU_LIDSUSPEND */ 69 #define CPU_LIDACTION 13 /* action caused by lid close */ 70 #define CPU_MAXID 14 /* number of valid machdep ids */ 71 72 #define CTL_MACHDEP_NAMES { \ 73 { 0, 0 }, \ 74 { 0, 0 }, \ 75 { 0, 0 }, \ 76 { 0, 0 }, \ 77 { "console_device", CTLTYPE_STRUCT }, \ 78 { "powersave", CTLTYPE_INT }, \ 79 { "allowaperture", CTLTYPE_INT }, \ 80 { 0, 0 }, \ 81 { 0, 0 }, \ 82 { 0, 0 }, \ 83 { 0, 0 }, \ 84 { "maxspeed", CTLTYPE_INT }, \ 85 { 0, 0 }, \ 86 { "lidaction", CTLTYPE_INT }, \ 87 } 88 89 #ifdef _KERNEL 90 91 /* 92 * Kernel-only definitions 93 */ 94 95 #include <arm/cpuconf.h> 96 97 #include <machine/intr.h> 98 #include <machine/frame.h> 99 #include <machine/pcb.h> 100 #include <arm/armreg.h> 101 102 /* 1 == use cpu_sleep(), 0 == don't */ 103 extern int cpu_do_powersave; 104 105 /* All the CLKF_* macros take a struct clockframe * as an argument. */ 106 107 /* 108 * CLKF_USERMODE: Return TRUE/FALSE (1/0) depending on whether the 109 * frame came from USR mode or not. 110 */ 111 #define CLKF_USERMODE(frame) ((frame->if_spsr & PSR_MODE) == PSR_USR32_MODE) 112 113 /* 114 * CLKF_INTR: True if we took the interrupt from inside another 115 * interrupt handler. 116 */ 117 #define CLKF_INTR(frame) (curcpu()->ci_idepth > 1) 118 119 /* 120 * CLKF_PC: Extract the program counter from a clockframe 121 */ 122 #define CLKF_PC(frame) (frame->if_pc) 123 124 /* 125 * PROC_PC: Find out the program counter for the given process. 126 */ 127 #define PROC_PC(p) ((p)->p_addr->u_pcb.pcb_tf->tf_pc) 128 #define PROC_STACK(p) ((p)->p_addr->u_pcb.pcb_tf->tf_usr_sp) 129 130 /* The address of the vector page. */ 131 extern vaddr_t vector_page; 132 void arm32_vector_init(vaddr_t, int); 133 134 #define ARM_VEC_RESET (1 << 0) 135 #define ARM_VEC_UNDEFINED (1 << 1) 136 #define ARM_VEC_SWI (1 << 2) 137 #define ARM_VEC_PREFETCH_ABORT (1 << 3) 138 #define ARM_VEC_DATA_ABORT (1 << 4) 139 #define ARM_VEC_ADDRESS_EXCEPTION (1 << 5) 140 #define ARM_VEC_IRQ (1 << 6) 141 #define ARM_VEC_FIQ (1 << 7) 142 143 #define ARM_NVEC 8 144 #define ARM_VEC_ALL 0xffffffff 145 146 /* 147 * Per-CPU information. For now we assume one CPU. 148 */ 149 150 #include <sys/device.h> 151 #include <sys/sched.h> 152 #include <sys/srp.h> 153 154 struct cpu_info { 155 struct device *ci_dev; /* Device corresponding to this CPU */ 156 struct cpu_info *ci_next; 157 struct schedstate_percpu ci_schedstate; /* scheduler state */ 158 159 u_int32_t ci_cpuid; 160 uint64_t ci_mpidr; 161 int ci_node; 162 struct cpu_info *ci_self; 163 164 struct proc *ci_curproc; 165 struct proc *ci_fpuproc; 166 u_int32_t ci_randseed; 167 168 struct pcb *ci_curpcb; 169 struct pcb *ci_idle_pcb; 170 171 uint32_t ci_cpl; 172 uint32_t ci_ipending; 173 uint32_t ci_idepth; 174 #ifdef DIAGNOSTIC 175 int ci_mutex_level; 176 #endif 177 int ci_want_resched; 178 179 void (*ci_flush_bp)(void); 180 181 struct opp_table *ci_opp_table; 182 volatile int ci_opp_idx; 183 volatile int ci_opp_max; 184 uint32_t ci_cpu_supply; 185 186 #ifdef MULTIPROCESSOR 187 struct srp_hazard ci_srp_hazards[SRP_HAZARD_NUM]; 188 volatile int ci_flags; 189 uint32_t ci_ttbr0; 190 vaddr_t ci_pl1_stkend; 191 vaddr_t ci_irq_stkend; 192 vaddr_t ci_abt_stkend; 193 vaddr_t ci_und_stkend; 194 #endif 195 196 #ifdef GPROF 197 struct gmonparam *ci_gmon; 198 #endif 199 }; 200 201 #define CPUF_PRIMARY (1<<0) 202 #define CPUF_AP (1<<1) 203 #define CPUF_IDENTIFY (1<<2) 204 #define CPUF_IDENTIFIED (1<<3) 205 #define CPUF_PRESENT (1<<4) 206 #define CPUF_GO (1<<5) 207 #define CPUF_RUNNING (1<<6) 208 209 static inline struct cpu_info * 210 curcpu(void) 211 { 212 struct cpu_info *__ci; 213 __asm volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (__ci)); 214 return (__ci); 215 } 216 217 extern struct cpu_info cpu_info_primary; 218 extern struct cpu_info *cpu_info_list; 219 220 #ifndef MULTIPROCESSOR 221 #define cpu_number() 0 222 #define CPU_IS_PRIMARY(ci) 1 223 #define CPU_INFO_ITERATOR int 224 #define CPU_INFO_FOREACH(cii, ci) \ 225 for (cii = 0, ci = curcpu(); ci != NULL; ci = NULL) 226 #define CPU_INFO_UNIT(ci) 0 227 #define MAXCPUS 1 228 #define cpu_kick(ci) 229 #define cpu_unidle(ci) 230 #else 231 #define cpu_number() (curcpu()->ci_cpuid) 232 #define CPU_IS_PRIMARY(ci) ((ci) == &cpu_info_primary) 233 #define CPU_INFO_ITERATOR int 234 #define CPU_INFO_FOREACH(cii, ci) for (cii = 0, ci = cpu_info_list; \ 235 ci != NULL; ci = ci->ci_next) 236 #define CPU_INFO_UNIT(ci) ((ci)->ci_dev ? (ci)->ci_dev->dv_unit : 0) 237 #define MAXCPUS 4 238 void cpu_kick(struct cpu_info *); 239 void cpu_unidle(struct cpu_info *ci); 240 241 extern struct cpu_info *cpu_info[MAXCPUS]; 242 243 void cpu_boot_secondary_processors(void); 244 #endif /* !MULTIPROCESSOR */ 245 246 #define CPU_BUSY_CYCLE() do {} while (0) 247 248 #define curpcb curcpu()->ci_curpcb 249 250 /* 251 * Scheduling glue 252 */ 253 254 extern int astpending; 255 #define setsoftast() (astpending = 1) 256 257 /* 258 * Notify the current process (p) that it has a signal pending, 259 * process as soon as possible. 260 */ 261 262 #define signotify(p) setsoftast() 263 264 /* 265 * Preempt the current process if in interrupt from user mode, 266 * or after the current trap/syscall if in system mode. 267 */ 268 extern int want_resched; /* resched() was called */ 269 #define need_resched(ci) (want_resched = 1, setsoftast()) 270 #define clear_resched(ci) want_resched = 0 271 272 /* 273 * Give a profiling tick to the current process when the user profiling 274 * buffer pages are invalid. On the i386, request an ast to send us 275 * through trap(), marking the proc as needing a profiling tick. 276 */ 277 #define need_proftick(p) setsoftast() 278 279 /* 280 * cpu device glue (belongs in cpuvar.h) 281 */ 282 283 int cpu_alloc_idle_pcb(struct cpu_info *); 284 285 /* 286 * Random cruft 287 */ 288 289 /* cpuswitch.S */ 290 struct pcb; 291 void savectx (struct pcb *pcb); 292 293 /* machdep.h */ 294 void bootsync (int); 295 296 /* fault.c */ 297 int badaddr_read (void *, size_t, void *); 298 299 /* syscall.c */ 300 void swi_handler (trapframe_t *); 301 302 /* machine_machdep.c */ 303 void board_startup(void); 304 305 static inline u_long 306 intr_disable(void) 307 { 308 uint32_t cpsr; 309 310 __asm volatile ("mrs %0, cpsr" : "=r"(cpsr)); 311 __asm volatile ("msr cpsr_c, %0" :: "r"(cpsr | PSR_I)); 312 313 return cpsr; 314 } 315 316 static inline void 317 intr_restore(u_long cpsr) 318 { 319 __asm volatile ("msr cpsr_c, %0" :: "r"(cpsr)); 320 } 321 322 void cpu_startclock(void); 323 324 #endif /* _KERNEL */ 325 326 #ifdef MULTIPROCESSOR 327 #include <sys/mplock.h> 328 #endif /* MULTIPROCESSOR */ 329 330 #endif /* !_ARM_CPU_H_ */ 331