psl.h revision 1.35
1 /* $NetBSD: psl.h,v 1.35 2006/12/26 15:22:44 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)psl.h 8.1 (Berkeley) 6/11/93 41 */ 42 43 #ifndef PSR_IMPL 44 45 /* 46 * SPARC Process Status Register (in psl.h for hysterical raisins). This 47 * doesn't exist on the V9. 48 * 49 * The picture in the Sun manuals looks like this: 50 * 1 1 51 * 31 28 27 24 23 20 19 14 3 2 11 8 7 6 5 4 0 52 * +-------+-------+-------+-----------+-+-+-------+-+-+-+---------+ 53 * | impl | ver | icc | reserved |E|E| pil |S|P|E| CWP | 54 * | | |n z v c| |C|F| | |S|T| | 55 * +-------+-------+-------+-----------+-+-+-------+-+-+-+---------+ 56 */ 57 58 #define PSR_IMPL 0xf0000000 /* implementation */ 59 #define PSR_VER 0x0f000000 /* version */ 60 #define PSR_ICC 0x00f00000 /* integer condition codes */ 61 #define PSR_N 0x00800000 /* negative */ 62 #define PSR_Z 0x00400000 /* zero */ 63 #define PSR_O 0x00200000 /* overflow */ 64 #define PSR_C 0x00100000 /* carry */ 65 #define PSR_EC 0x00002000 /* coprocessor enable */ 66 #define PSR_EF 0x00001000 /* FP enable */ 67 #define PSR_PIL 0x00000f00 /* interrupt level */ 68 #define PSR_S 0x00000080 /* supervisor (kernel) mode */ 69 #define PSR_PS 0x00000040 /* previous supervisor mode (traps) */ 70 #define PSR_ET 0x00000020 /* trap enable */ 71 #define PSR_CWP 0x0000001f /* current window pointer */ 72 73 #define PSR_BITS "\20\16EC\15EF\10S\7PS\6ET" 74 75 /* Interesting spl()s */ 76 #define PIL_SCSI 3 77 #define PIL_FDSOFT 4 78 #define PIL_AUSOFT 4 79 #define PIL_BIO 5 80 #define PIL_VIDEO 5 81 #define PIL_TTY 6 82 #define PIL_LPT 6 83 #define PIL_NET 6 84 #define PIL_VM 7 85 #define PIL_AUD 8 86 #define PIL_CLOCK 10 87 #define PIL_FD 11 88 #define PIL_SER 12 89 #define PIL_STATCLOCK 14 90 #define PIL_HIGH 15 91 #define PIL_SCHED PIL_CLOCK 92 #define PIL_LOCK PIL_HIGH 93 94 /* 95 * SPARC V9 CCR register 96 */ 97 98 #define ICC_C 0x01L 99 #define ICC_V 0x02L 100 #define ICC_Z 0x04L 101 #define ICC_N 0x08L 102 #define XCC_SHIFT 4 103 #define XCC_C (ICC_C<<XCC_SHIFT) 104 #define XCC_V (ICC_V<<XCC_SHIFT) 105 #define XCC_Z (ICC_Z<<XCC_SHIFT) 106 #define XCC_N (ICC_N<<XCC_SHIFT) 107 108 109 /* 110 * SPARC V9 PSTATE register (what replaces the PSR in V9) 111 * 112 * Here's the layout: 113 * 114 * 11 10 9 8 7 6 5 4 3 2 1 0 115 * +------------------------------------------------------------+ 116 * | IG | MG | CLE | TLE | MM | RED | PEF | AM | PRIV | IE | AG | 117 * +------------------------------------------------------------+ 118 */ 119 120 #define PSTATE_IG 0x800 /* enable spitfire interrupt globals */ 121 #define PSTATE_MG 0x400 /* enable spitfire MMU globals */ 122 #define PSTATE_CLE 0x200 /* current little endian */ 123 #define PSTATE_TLE 0x100 /* traps little endian */ 124 #define PSTATE_MM 0x0c0 /* memory model */ 125 #define PSTATE_MM_TSO 0x000 /* total store order */ 126 #define PSTATE_MM_PSO 0x040 /* partial store order */ 127 #define PSTATE_MM_RMO 0x080 /* Relaxed memory order */ 128 #define PSTATE_RED 0x020 /* RED state */ 129 #define PSTATE_PEF 0x010 /* enable floating point */ 130 #define PSTATE_AM 0x008 /* 32-bit address masking */ 131 #define PSTATE_PRIV 0x004 /* privileged mode */ 132 #define PSTATE_IE 0x002 /* interrupt enable */ 133 #define PSTATE_AG 0x001 /* enable alternate globals */ 134 135 #define PSTATE_BITS "\20\14IG\13MG\12CLE\11TLE\10\7MM\6RED\5PEF\4AM\3PRIV\2IE\1AG" 136 137 138 /* 139 * 32-bit code requires TSO or at best PSO since that's what's supported on 140 * SPARC V8 and earlier machines. 141 * 142 * 64-bit code sets the memory model in the ELF header. 143 * 144 * We're running kernel code in TSO for the moment so we don't need to worry 145 * about possible memory barrier bugs. 146 */ 147 148 #ifdef __arch64__ 149 #define PSTATE_PROM (PSTATE_MM_TSO|PSTATE_PRIV) 150 #define PSTATE_NUCLEUS (PSTATE_MM_TSO|PSTATE_PRIV|PSTATE_AG) 151 #define PSTATE_KERN (PSTATE_MM_TSO|PSTATE_PRIV) 152 #define PSTATE_INTR (PSTATE_KERN|PSTATE_IE) 153 #define PSTATE_USER32 (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE) 154 #define PSTATE_USER (PSTATE_MM_RMO|PSTATE_IE) 155 #else 156 #define PSTATE_PROM (PSTATE_MM_TSO|PSTATE_PRIV) 157 #define PSTATE_NUCLEUS (PSTATE_MM_TSO|PSTATE_AM|PSTATE_PRIV|PSTATE_AG) 158 #define PSTATE_KERN (PSTATE_MM_TSO|PSTATE_AM|PSTATE_PRIV) 159 #define PSTATE_INTR (PSTATE_KERN|PSTATE_IE) 160 #define PSTATE_USER32 (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE) 161 #define PSTATE_USER (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE) 162 #endif 163 164 165 /* 166 * SPARC V9 TSTATE register 167 * 168 * 39 32 31 24 23 18 17 8 7 5 4 0 169 * +-----+-----+-----+--------+---+-----+ 170 * | CCR | ASI | - | PSTATE | - | CWP | 171 * +-----+-----+-----+--------+---+-----+ 172 */ 173 174 #define TSTATE_CWP 0x01f 175 #define TSTATE_PSTATE 0x6ff00 176 #define TSTATE_PSTATE_SHIFT 8 177 #define TSTATE_ASI 0xff000000LL 178 #define TSTATE_ASI_SHIFT 24 179 #define TSTATE_CCR 0xff00000000LL 180 #define TSTATE_CCR_SHIFT 32 181 182 #define PSRCC_TO_TSTATE(x) (((int64_t)(x)&PSR_ICC)<<(TSTATE_CCR_SHIFT-19)) 183 #define TSTATECCR_TO_PSR(x) (((x)&TSTATE_CCR)>>(TSTATE_CCR_SHIFT-19)) 184 185 /* 186 * These are here to simplify life. 187 */ 188 #define TSTATE_IG (PSTATE_IG<<TSTATE_PSTATE_SHIFT) 189 #define TSTATE_MG (PSTATE_MG<<TSTATE_PSTATE_SHIFT) 190 #define TSTATE_CLE (PSTATE_CLE<<TSTATE_PSTATE_SHIFT) 191 #define TSTATE_TLE (PSTATE_TLE<<TSTATE_PSTATE_SHIFT) 192 #define TSTATE_MM (PSTATE_MM<<TSTATE_PSTATE_SHIFT) 193 #define TSTATE_MM_TSO (PSTATE_MM_TSO<<TSTATE_PSTATE_SHIFT) 194 #define TSTATE_MM_PSO (PSTATE_MM_PSO<<TSTATE_PSTATE_SHIFT) 195 #define TSTATE_MM_RMO (PSTATE_MM_RMO<<TSTATE_PSTATE_SHIFT) 196 #define TSTATE_RED (PSTATE_RED<<TSTATE_PSTATE_SHIFT) 197 #define TSTATE_PEF (PSTATE_PEF<<TSTATE_PSTATE_SHIFT) 198 #define TSTATE_AM (PSTATE_AM<<TSTATE_PSTATE_SHIFT) 199 #define TSTATE_PRIV (PSTATE_PRIV<<TSTATE_PSTATE_SHIFT) 200 #define TSTATE_IE (PSTATE_IE<<TSTATE_PSTATE_SHIFT) 201 #define TSTATE_AG (PSTATE_AG<<TSTATE_PSTATE_SHIFT) 202 203 #define TSTATE_BITS "\20\14IG\13MG\12CLE\11TLE\10\7MM\6RED\5PEF\4AM\3PRIV\2IE\1AG" 204 205 #define TSTATE_KERN ((TSTATE_KERN)<<TSTATE_PSTATE_SHIFT) 206 #define TSTATE_USER ((TSTATE_USER)<<TSTATE_PSTATE_SHIFT) 207 /* 208 * SPARC V9 VER version register. 209 * 210 * 63 48 47 32 31 24 23 16 15 8 7 5 4 0 211 * +-------+------+------+-----+-------+---+--------+ 212 * | manuf | impl | mask | - | maxtl | - | maxwin | 213 * +-------+------+------+-----+-------+---+--------+ 214 * 215 */ 216 217 #define VER_MANUF 0xffff000000000000LL 218 #define VER_MANUF_SHIFT 48 219 #define VER_IMPL 0x0000ffff00000000LL 220 #define VER_IMPL_SHIFT 32 221 #define VER_MASK 0x00000000ff000000LL 222 #define VER_MASK_SHIFT 24 223 #define VER_MAXTL 0x000000000000ff00LL 224 #define VER_MAXTL_SHIFT 8 225 #define VER_MAXWIN 0x000000000000001fLL 226 227 /* 228 * Here are a few things to help us transition between user and kernel mode: 229 */ 230 231 /* Memory models */ 232 #define KERN_MM PSTATE_MM_TSO 233 #define USER_MM PSTATE_MM_RMO 234 235 /* 236 * Register window handlers. These point to generic routines that check the 237 * stack pointer and then vector to the real handler. We could optimize this 238 * if we could guarantee only 32-bit or 64-bit stacks. 239 */ 240 #define WSTATE_KERN 026 241 #define WSTATE_USER 022 242 243 #define CWP 0x01f 244 245 /* 64-byte alignment -- this seems the best place to put this. */ 246 #define BLOCK_SIZE 64 247 #define BLOCK_ALIGN 0x3f 248 249 #if defined(_KERNEL) && !defined(_LOCORE) 250 251 /* 252 * Inlines for manipulating privileged registers 253 */ 254 static __inline int 255 getpstate(void) 256 { 257 int pstate; 258 259 __asm volatile("rdpr %%pstate,%0" : "=r" (pstate)); 260 return (pstate); 261 } 262 263 static __inline void 264 setpstate(int newpstate) 265 { 266 __asm volatile("wrpr %0,0,%%pstate" : : "r" (newpstate)); 267 } 268 269 static __inline int 270 getcwp(void) 271 { 272 int cwp; 273 274 __asm volatile("rdpr %%cwp,%0" : "=r" (cwp)); 275 return (cwp); 276 } 277 278 static __inline void 279 setcwp(int newcwp) 280 { 281 __asm volatile("wrpr %0,0,%%cwp" : : "r" (newcwp)); 282 } 283 284 static __inline uint64_t 285 getver(void) 286 { 287 uint64_t ver; 288 289 __asm volatile("rdpr %%ver,%0" : "=r" (ver)); 290 return (ver); 291 } 292 293 static __inline int 294 intr_disable(void) 295 { 296 int pstate = getpstate(); 297 298 setpstate(pstate & ~PSTATE_IE); 299 return (pstate); 300 } 301 302 static __inline void 303 intr_restore(int pstate) 304 { 305 setpstate(pstate); 306 } 307 308 /* 309 * GCC pseudo-functions for manipulating PIL 310 */ 311 312 #ifdef SPLDEBUG 313 void prom_printf(const char *fmt, ...); 314 extern int printspl; 315 #define SPLPRINT(x) \ 316 { \ 317 if (printspl) { \ 318 int i = 10000000; \ 319 prom_printf x ; \ 320 while (i--) \ 321 ; \ 322 } \ 323 } 324 #define SPL(name, newpil) \ 325 static __inline int name##X(const char* file, int line) \ 326 { \ 327 int oldpil; \ 328 __asm volatile("rdpr %%pil,%0" : "=r" (oldpil)); \ 329 SPLPRINT(("{%s:%d %d=>%d}", file, line, oldpil, newpil)); \ 330 __asm volatile("wrpr %%g0,%0,%%pil" : : "n" (newpil)); \ 331 return (oldpil); \ 332 } 333 /* A non-priority-decreasing version of SPL */ 334 #define SPLHOLD(name, newpil) \ 335 static __inline int name##X(const char* file, int line) \ 336 { \ 337 int oldpil; \ 338 __asm volatile("rdpr %%pil,%0" : "=r" (oldpil)); \ 339 if (newpil <= oldpil) \ 340 return oldpil; \ 341 SPLPRINT(("{%s:%d %d->!d}", file, line, oldpil, newpil)); \ 342 __asm volatile("wrpr %%g0,%0,%%pil" : : "n" (newpil)); \ 343 return (oldpil); \ 344 } 345 346 #else 347 #define SPLPRINT(x) 348 #define SPL(name, newpil) \ 349 static __inline int name(void) \ 350 { \ 351 int oldpil; \ 352 __asm volatile("rdpr %%pil,%0" : "=r" (oldpil)); \ 353 __asm volatile("wrpr %%g0,%0,%%pil" : : "n" (newpil)); \ 354 return (oldpil); \ 355 } 356 /* A non-priority-decreasing version of SPL */ 357 #define SPLHOLD(name, newpil) \ 358 static __inline int name(void) \ 359 { \ 360 int oldpil; \ 361 __asm volatile("rdpr %%pil,%0" : "=r" (oldpil)); \ 362 if (newpil <= oldpil) \ 363 return oldpil; \ 364 __asm volatile("wrpr %%g0,%0,%%pil" : : "n" (newpil)); \ 365 return (oldpil); \ 366 } 367 #endif 368 369 typedef uint8_t ipl_t; 370 typedef struct { 371 ipl_t _ipl; 372 } ipl_cookie_t; 373 374 static inline ipl_cookie_t 375 makeiplcookie(ipl_t ipl) 376 { 377 378 return (ipl_cookie_t){._ipl = ipl}; 379 } 380 381 static __inline int __attribute__((__unused__)) 382 splraiseipl(ipl_cookie_t icookie) 383 { 384 int newpil = icookie._ipl; 385 int oldpil; 386 387 /* 388 * NetBSD/sparc64's IPL_* constants equate directly to the 389 * corresponding PIL_* names; no need to map them here. 390 */ 391 __asm __volatile("rdpr %%pil,%0" : "=r" (oldpil)); 392 if (newpil <= oldpil) 393 return (oldpil); 394 __asm __volatile("wrpr %0,0,%%pil" : : "r" (newpil)); 395 return (oldpil); 396 } 397 398 SPL(spl0, 0) 399 400 SPL(spllowersoftclock, 1) 401 402 SPLHOLD(splsoftint, 1) 403 #define splsoftclock splsoftint 404 #define splsoftnet splsoftint 405 406 SPLHOLD(splsoftserial, 4) 407 408 /* audio software interrupts are at software level 4 */ 409 SPLHOLD(splausoft, PIL_AUSOFT) 410 411 /* floppy software interrupts are at software level 4 too */ 412 SPLHOLD(splfdsoft, PIL_FDSOFT) 413 414 /* Block devices */ 415 SPLHOLD(splbio, PIL_BIO) 416 417 /* network hardware interrupts are at level 6 */ 418 SPLHOLD(splnet, PIL_NET) 419 420 /* tty input runs at software level 6 */ 421 SPLHOLD(spltty, PIL_TTY) 422 423 /* parallel port runs at software level 6 */ 424 SPLHOLD(spllpt, PIL_LPT) 425 426 /* 427 * Memory allocation (must be as high as highest network, tty, or disk device) 428 */ 429 SPLHOLD(splvm, PIL_VM) 430 431 SPLHOLD(splclock, PIL_CLOCK) 432 433 /* fd hardware interrupts are at level 11 */ 434 SPLHOLD(splfd, PIL_FD) 435 436 /* zs hardware interrupts are at level 12 */ 437 SPLHOLD(splzs, PIL_SER) 438 SPLHOLD(splserial, PIL_SER) 439 440 /* audio hardware interrupts are at level 13 */ 441 SPLHOLD(splaudio, PIL_AUD) 442 443 /* second sparc timer interrupts at level 14 */ 444 SPLHOLD(splstatclock, PIL_STATCLOCK) 445 446 SPLHOLD(splsched, PIL_SCHED) 447 SPLHOLD(spllock, PIL_LOCK) 448 449 SPLHOLD(splipi, PIL_HIGH) 450 451 SPLHOLD(splhigh, PIL_HIGH) 452 453 /* splx does not have a return value */ 454 #ifdef SPLDEBUG 455 #define spl0() spl0X(__FILE__, __LINE__) 456 #define spllowersoftclock() spllowersoftclockX(__FILE__, __LINE__) 457 #define splsoftint() splsoftintX(__FILE__, __LINE__) 458 #define splsoftserial() splsoftserialX(__FILE__, __LINE__) 459 #define splausoft() splausoftX(__FILE__, __LINE__) 460 #define splfdsoft() splfdsoftX(__FILE__, __LINE__) 461 #define splbio() splbioX(__FILE__, __LINE__) 462 #define splnet() splnetX(__FILE__, __LINE__) 463 #define spltty() splttyX(__FILE__, __LINE__) 464 #define spllpt() spllptX(__FILE__, __LINE__) 465 #define splvm() splvmX(__FILE__, __LINE__) 466 #define splclock() splclockX(__FILE__, __LINE__) 467 #define splfd() splfdX(__FILE__, __LINE__) 468 #define splzs() splzsX(__FILE__, __LINE__) 469 #define splserial() splzerialX(__FILE__, __LINE__) 470 #define splaudio() splaudioX(__FILE__, __LINE__) 471 #define splstatclock() splstatclockX(__FILE__, __LINE__) 472 #define splsched() splschedX(__FILE__, __LINE__) 473 #define spllock() spllockX(__FILE__, __LINE__) 474 #define splhigh() splhighX(__FILE__, __LINE__) 475 #define splx(x) splxX((x),__FILE__, __LINE__) 476 #define splipi() splhighX(__FILE__, __LINE__) 477 478 static __inline void splxX(int newpil, const char *file, int line) 479 #else 480 static __inline void splx(int newpil) 481 #endif 482 { 483 #ifdef SPLDEBUG 484 int pil; 485 486 __asm volatile("rdpr %%pil,%0" : "=r" (pil)); 487 SPLPRINT(("{%d->%d}", pil, newpil)); 488 #endif 489 __asm volatile("wrpr %%g0,%0,%%pil" : : "rn" (newpil)); 490 } 491 #endif /* KERNEL && !_LOCORE */ 492 493 #endif /* PSR_IMPL */ 494
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