cpu.h revision 1.77.8.1
1 /* $NetBSD: cpu.h,v 1.77.8.1 2006/12/29 20:27:42 ad 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 #include <mips/cpuregs.h> 41 42 /* 43 * Exported definitions unique to NetBSD/mips cpu support. 44 */ 45 46 #ifdef _KERNEL 47 #ifndef _LOCORE 48 #include <sys/cpu_data.h> 49 50 #if defined(_KERNEL_OPT) 51 #include "opt_lockdebug.h" 52 #endif 53 54 struct cpu_info { 55 struct cpu_data ci_data; /* MI per-cpu data */ 56 u_long ci_cpu_freq; /* CPU frequency */ 57 u_long ci_cycles_per_hz; /* CPU freq / hz */ 58 u_long ci_divisor_delay; /* for delay/DELAY */ 59 u_long ci_divisor_recip; /* scaled reciprocal of previous; 60 see below */ 61 int ci_mtx_count; /* negative count of held mutexes */ 62 int ci_mtx_oldspl; /* saved SPL value */ 63 }; 64 65 /* 66 * To implement a more accurate microtime using the CP0 COUNT register 67 * we need to divide that register by the number of cycles per MHz. 68 * But... 69 * 70 * DIV and DIVU are expensive on MIPS (eg 75 clocks on the R4000). MULT 71 * and MULTU are only 12 clocks on the same CPU. 72 * 73 * The strategy we use is to calculate the reciprical of cycles per MHz, 74 * scaled by 1<<32. Then we can simply issue a MULTU and pluck of the 75 * HI register and have the results of the division. 76 */ 77 #define MIPS_SET_CI_RECIPRICAL(cpu) \ 78 do { \ 79 KASSERT((cpu)->ci_divisor_delay != 0); \ 80 (cpu)->ci_divisor_recip = 0x100000000ULL / (cpu)->ci_divisor_delay; \ 81 } while (0) 82 83 #define MIPS_COUNT_TO_MHZ(cpu, count, res) \ 84 __asm volatile("multu %1,%2 ; mfhi %0" \ 85 : "=r"((res)) : "r"((count)), "r"((cpu)->ci_divisor_recip)) 86 87 #endif /* !_LOCORE */ 88 #endif /* _KERNEL */ 89 90 /* 91 * CTL_MACHDEP definitions. 92 */ 93 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 94 #define CPU_BOOTED_KERNEL 2 /* string: booted kernel name */ 95 #define CPU_ROOT_DEVICE 3 /* string: root device name */ 96 #define CPU_LLSC 4 /* OS/CPU supports LL/SC instruction */ 97 98 /* 99 * Platform can override, but note this breaks userland compatibility 100 * with other mips platforms. 101 */ 102 #ifndef CPU_MAXID 103 #define CPU_MAXID 5 /* number of valid machdep ids */ 104 105 #define CTL_MACHDEP_NAMES { \ 106 { 0, 0 }, \ 107 { "console_device", CTLTYPE_STRUCT }, \ 108 { "booted_kernel", CTLTYPE_STRING }, \ 109 { "root_device", CTLTYPE_STRING }, \ 110 { "llsc", CTLTYPE_INT }, \ 111 } 112 #endif 113 114 #ifdef _KERNEL 115 #ifdef _LKM 116 /* Assume all CPU architectures are valid for LKM's */ 117 #define MIPS1 1 118 #define MIPS3 1 119 #define MIPS4 1 120 #define MIPS32 1 121 #define MIPS64 1 122 #endif 123 124 #if (MIPS1 + MIPS3 + MIPS4 + MIPS32 + MIPS64) == 0 125 #error at least one of MIPS1, MIPS3, MIPS4, MIPS32 or MIPS64 must be specified 126 #endif 127 128 /* Shortcut for MIPS3 or above defined */ 129 #if defined(MIPS3) || defined(MIPS4) || defined(MIPS32) || defined(MIPS64) 130 #define MIPS3_PLUS 1 131 #else 132 #undef MIPS3_PLUS 133 #endif 134 135 /* 136 * Macros to find the CPU architecture we're on at run-time, 137 * or if possible, at compile-time. 138 */ 139 140 #define CPU_ARCH_MIPSx 0 /* XXX unknown */ 141 #define CPU_ARCH_MIPS1 (1 << 0) 142 #define CPU_ARCH_MIPS2 (1 << 1) 143 #define CPU_ARCH_MIPS3 (1 << 2) 144 #define CPU_ARCH_MIPS4 (1 << 3) 145 #define CPU_ARCH_MIPS5 (1 << 4) 146 #define CPU_ARCH_MIPS32 (1 << 5) 147 #define CPU_ARCH_MIPS64 (1 << 6) 148 149 #ifndef _LOCORE 150 extern struct cpu_info cpu_info_store; 151 152 #define curcpu() (&cpu_info_store) 153 #define cpu_number() (0) 154 #define cpu_proc_fork(p1, p2) 155 156 /* XXX simonb 157 * Should the following be in a cpu_info type structure? 158 * And how many of these are per-cpu vs. per-system? (Ie, 159 * we can assume that all cpus have the same mmu-type, but 160 * maybe not that all cpus run at the same clock speed. 161 * Some SGI's apparently support R12k and R14k in the same 162 * box.) 163 */ 164 extern int cpu_arch; 165 extern int mips_cpu_flags; 166 extern int mips_has_r4k_mmu; 167 extern int mips_has_llsc; 168 extern int mips3_pg_cached; 169 extern u_int mips3_pg_shift; 170 171 #define CPU_MIPS_R4K_MMU 0x0001 172 #define CPU_MIPS_NO_LLSC 0x0002 173 #define CPU_MIPS_CAUSE_IV 0x0004 174 #define CPU_MIPS_HAVE_SPECIAL_CCA 0x0008 /* Defaults to '3' if not set. */ 175 #define CPU_MIPS_CACHED_CCA_MASK 0x0070 176 #define CPU_MIPS_CACHED_CCA_SHIFT 4 177 #define CPU_MIPS_DOUBLE_COUNT 0x0080 /* 1 cp0 count == 2 clock cycles */ 178 #define CPU_MIPS_USE_WAIT 0x0100 /* Use "wait"-based cpu_idle() */ 179 #define CPU_MIPS_NO_WAIT 0x0200 /* Inverse of previous, for mips32/64 */ 180 #define CPU_MIPS_D_CACHE_COHERENT 0x0400 /* D-cache is fully coherent */ 181 #define CPU_MIPS_I_D_CACHE_COHERENT 0x0800 /* I-cache funcs don't need to flush the D-cache */ 182 #define MIPS_NOT_SUPP 0x8000 183 184 #if (MIPS1 + MIPS3 + MIPS4 + MIPS32 + MIPS64) == 1 185 #ifdef MIPS1 186 # define CPUISMIPS3 0 187 # define CPUIS64BITS 0 188 # define CPUISMIPS32 0 189 # define CPUISMIPS64 0 190 # define CPUISMIPSNN 0 191 # define MIPS_HAS_R4K_MMU 0 192 # define MIPS_HAS_CLOCK 0 193 # define MIPS_HAS_LLSC 0 194 #endif /* MIPS1 */ 195 196 #if defined(MIPS3) || defined(MIPS4) 197 # define CPUISMIPS3 1 198 # define CPUIS64BITS 1 199 # define CPUISMIPS32 0 200 # define CPUISMIPS64 0 201 # define CPUISMIPSNN 0 202 # define MIPS_HAS_R4K_MMU 1 203 # define MIPS_HAS_CLOCK 1 204 # define MIPS_HAS_LLSC (mips_has_llsc) 205 #endif /* MIPS3 || MIPS4 */ 206 207 #ifdef MIPS32 208 # define CPUISMIPS3 1 209 # define CPUIS64BITS 0 210 # define CPUISMIPS32 1 211 # define CPUISMIPS64 0 212 # define CPUISMIPSNN 1 213 # define MIPS_HAS_R4K_MMU 1 214 # define MIPS_HAS_CLOCK 1 215 # define MIPS_HAS_LLSC 1 216 #endif /* MIPS32 */ 217 218 #ifdef MIPS64 219 # define CPUISMIPS3 1 220 # define CPUIS64BITS 1 221 # define CPUISMIPS32 0 222 # define CPUISMIPS64 1 223 # define CPUISMIPSNN 1 224 # define MIPS_HAS_R4K_MMU 1 225 # define MIPS_HAS_CLOCK 1 226 # define MIPS_HAS_LLSC 1 227 #endif /* MIPS64 */ 228 229 #else /* run-time test */ 230 231 #define MIPS_HAS_R4K_MMU (mips_has_r4k_mmu) 232 #define MIPS_HAS_LLSC (mips_has_llsc) 233 234 /* This test is ... rather bogus */ 235 #define CPUISMIPS3 ((cpu_arch & \ 236 (CPU_ARCH_MIPS3 | CPU_ARCH_MIPS4 | CPU_ARCH_MIPS32 | CPU_ARCH_MIPS64)) != 0) 237 238 /* And these aren't much better while the previous test exists as is... */ 239 #define CPUISMIPS32 ((cpu_arch & CPU_ARCH_MIPS32) != 0) 240 #define CPUISMIPS64 ((cpu_arch & CPU_ARCH_MIPS64) != 0) 241 #define CPUISMIPSNN ((cpu_arch & (CPU_ARCH_MIPS32 | CPU_ARCH_MIPS64)) != 0) 242 #define CPUIS64BITS ((cpu_arch & \ 243 (CPU_ARCH_MIPS3 | CPU_ARCH_MIPS4 | CPU_ARCH_MIPS64)) != 0) 244 245 #define MIPS_HAS_CLOCK (cpu_arch >= CPU_ARCH_MIPS3) 246 #endif /* run-time test */ 247 248 249 /* 250 * definitions of cpu-dependent requirements 251 * referenced in generic code 252 */ 253 #define cpu_swapout(p) panic("cpu_swapout: can't get here"); 254 255 void cpu_intr(u_int32_t, u_int32_t, u_int32_t, u_int32_t); 256 257 /* 258 * Arguments to hardclock and gatherstats encapsulate the previous 259 * machine state in an opaque clockframe. 260 */ 261 struct clockframe { 262 int pc; /* program counter at time of interrupt */ 263 int sr; /* status register at time of interrupt */ 264 int ppl; /* previous priority level at time of interrupt */ 265 }; 266 267 /* 268 * A port must provde CLKF_USERMODE() and CLKF_BASEPRI() for use 269 * in machine-independent code. These differ on r4000 and r3000 systems; 270 * provide them in the port-dependent file that includes this one, using 271 * the macros below. 272 */ 273 274 /* mips1 versions */ 275 #define MIPS1_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KU_PREV) 276 #define MIPS1_CLKF_BASEPRI(framep) \ 277 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENA_PREV)) == 0) 278 279 /* mips3 versions */ 280 #define MIPS3_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KSU_USER) 281 #define MIPS3_CLKF_BASEPRI(framep) \ 282 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_IE)) == 0) 283 284 #ifdef IPL_ICU_MASK 285 #define ICU_CLKF_BASEPRI(framep) ((framep)->ppl == 0) 286 #endif 287 288 #define CLKF_PC(framep) ((framep)->pc) 289 #define CLKF_INTR(framep) (0) 290 291 #if defined(MIPS3_PLUS) && !defined(MIPS1) /* XXX bogus! */ 292 #define CLKF_USERMODE(framep) MIPS3_CLKF_USERMODE(framep) 293 #define CLKF_BASEPRI(framep) MIPS3_CLKF_BASEPRI(framep) 294 #endif 295 296 #if !defined(MIPS3_PLUS) && defined(MIPS1) /* XXX bogus! */ 297 #define CLKF_USERMODE(framep) MIPS1_CLKF_USERMODE(framep) 298 #define CLKF_BASEPRI(framep) MIPS1_CLKF_BASEPRI(framep) 299 #endif 300 301 #ifdef IPL_ICU_MASK 302 #undef CLKF_BASEPRI 303 #define CLKF_BASEPRI(framep) ICU_CLKF_BASEPRI(framep) 304 #endif 305 306 #if defined(MIPS3_PLUS) && defined(MIPS1) /* XXX bogus! */ 307 #define CLKF_USERMODE(framep) \ 308 ((CPUISMIPS3) ? MIPS3_CLKF_USERMODE(framep): MIPS1_CLKF_USERMODE(framep)) 309 #define CLKF_BASEPRI(framep) \ 310 ((CPUISMIPS3) ? MIPS3_CLKF_BASEPRI(framep): MIPS1_CLKF_BASEPRI(framep)) 311 #endif 312 313 /* 314 * This is used during profiling to integrate system time. It can safely 315 * assume that the process is resident. 316 */ 317 #define PROC_PC(p) \ 318 (((struct frame *)(p)->p_md.md_regs)->f_regs[37]) /* XXX PC */ 319 320 /* 321 * Preempt the current process if in interrupt from user mode, 322 * or after the current trap/syscall if in system mode. 323 */ 324 #define cpu_need_resched(ci) \ 325 do { \ 326 want_resched = 1; \ 327 if (curlwp != NULL) \ 328 aston(curlwp); \ 329 } while (/*CONSTCOND*/0) 330 331 /* 332 * Give a profiling tick to the current process when the user profiling 333 * buffer pages are invalid. On the MIPS, request an ast to send us 334 * through trap, marking the proc as needing a profiling tick. 335 */ 336 #define cpu_need_proftick(l) \ 337 do { \ 338 (l)->l_pflag |= LP_OWEUPC; \ 339 aston(l); \ 340 } while (/*CONSTCOND*/0) 341 342 /* 343 * Notify the current process (p) that it has a signal pending, 344 * process as soon as possible. 345 */ 346 #define cpu_signotify(p) aston(l) 347 348 #define aston(l) ((l)->l_md.md_astpending = 1) 349 350 extern int want_resched; /* resched() was called */ 351 352 /* 353 * Misc prototypes and variable declarations. 354 */ 355 struct lwp; 356 struct user; 357 358 extern struct lwp *fpcurlwp; /* the current FPU owner */ 359 extern struct pcb *curpcb; /* the current running pcb */ 360 extern struct segtab *segbase; /* current segtab base */ 361 362 /* trap.c */ 363 void netintr(void); 364 int kdbpeek(vaddr_t); 365 366 /* mips_machdep.c */ 367 void dumpsys(void); 368 int savectx(struct user *); 369 void mips_init_msgbuf(void); 370 void savefpregs(struct lwp *); 371 void loadfpregs(struct lwp *); 372 373 /* locore*.S */ 374 int badaddr(void *, size_t); 375 int badaddr64(uint64_t, size_t); 376 377 /* mips_machdep.c */ 378 void cpu_identify(void); 379 void mips_vector_init(void); 380 381 #endif /* ! _LOCORE */ 382 #endif /* _KERNEL */ 383 #endif /* _CPU_H_ */ 384
Indexes created Mon Oct 13 08:09:50 GMT 2025