asm.h revision 1.39
1 /* $NetBSD: asm.h,v 1.39 2007/05/17 14:51:22 yamt 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. 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 * @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93 35 */ 36 37 /* 38 * machAsmDefs.h -- 39 * 40 * Macros used when writing assembler programs. 41 * 42 * Copyright (C) 1989 Digital Equipment Corporation. 43 * Permission to use, copy, modify, and distribute this software and 44 * its documentation for any purpose and without fee is hereby granted, 45 * provided that the above copyright notice appears in all copies. 46 * Digital Equipment Corporation makes no representations about the 47 * suitability of this software for any purpose. It is provided "as is" 48 * without express or implied warranty. 49 * 50 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h, 51 * v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL) 52 */ 53 54 #ifndef _MIPS_ASM_H 55 #define _MIPS_ASM_H 56 57 #include <machine/cdefs.h> /* for API selection */ 58 #include <mips/regdef.h> 59 60 /* 61 * Define -pg profile entry code. 62 * Must always be noreorder, must never use a macro instruction 63 * Final addiu to t9 must always equal the size of this _KERN_MCOUNT 64 */ 65 #define _KERN_MCOUNT \ 66 .set push; \ 67 .set noreorder; \ 68 .set noat; \ 69 subu sp,sp,16; \ 70 sw t9,12(sp); \ 71 move AT,ra; \ 72 lui t9,%hi(_mcount); \ 73 addiu t9,t9,%lo(_mcount); \ 74 jalr t9; \ 75 nop; \ 76 lw t9,4(sp); \ 77 addiu sp,sp,8; \ 78 addiu t9,t9,40; \ 79 .set pop; 80 81 #ifdef GPROF 82 #define MCOUNT _KERN_MCOUNT 83 #else 84 #define MCOUNT 85 #endif 86 87 #ifdef __NO_LEADING_UNDERSCORES__ 88 # define _C_LABEL(x) x 89 #else 90 # ifdef __STDC__ 91 # define _C_LABEL(x) _ ## x 92 # else 93 # define _C_LABEL(x) _/**/x 94 # endif 95 #endif 96 97 #ifdef USE_AENT 98 #define AENT(x) \ 99 .aent x, 0 100 #else 101 #define AENT(x) 102 #endif 103 104 /* 105 * WEAK_ALIAS: create a weak alias. 106 */ 107 #define WEAK_ALIAS(alias,sym) \ 108 .weak alias; \ 109 alias = sym 110 /* 111 * STRONG_ALIAS: create a strong alias. 112 */ 113 #define STRONG_ALIAS(alias,sym) \ 114 .globl alias; \ 115 alias = sym 116 117 /* 118 * WARN_REFERENCES: create a warning if the specified symbol is referenced. 119 */ 120 #ifdef __STDC__ 121 #define WARN_REFERENCES(_sym,_msg) \ 122 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 123 #else 124 #define WARN_REFERENCES(_sym,_msg) \ 125 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 126 #endif /* __STDC__ */ 127 128 /* 129 * LEAF 130 * A leaf routine does 131 * - call no other function, 132 * - never use any register that callee-saved (S0-S8), and 133 * - not use any local stack storage. 134 */ 135 #define LEAF(x) \ 136 .globl _C_LABEL(x); \ 137 .ent _C_LABEL(x), 0; \ 138 _C_LABEL(x): ; \ 139 .frame sp, 0, ra; \ 140 MCOUNT 141 142 /* 143 * LEAF_NOPROFILE 144 * No profilable leaf routine. 145 */ 146 #define LEAF_NOPROFILE(x) \ 147 .globl _C_LABEL(x); \ 148 .ent _C_LABEL(x), 0; \ 149 _C_LABEL(x): ; \ 150 .frame sp, 0, ra 151 152 /* 153 * STATIC_LEAF 154 * Declare a local leaf function. 155 */ 156 #define STATIC_LEAF(x) \ 157 .ent _C_LABEL(x), 0; \ 158 _C_LABEL(x): ; \ 159 .frame sp, 0, ra; \ 160 MCOUNT 161 162 /* 163 * XLEAF 164 * declare alternate entry to leaf routine 165 */ 166 #define XLEAF(x) \ 167 .globl _C_LABEL(x); \ 168 AENT (_C_LABEL(x)); \ 169 _C_LABEL(x): 170 171 /* 172 * STATIC_XLEAF 173 * declare alternate entry to a static leaf routine 174 */ 175 #define STATIC_XLEAF(x) \ 176 AENT (_C_LABEL(x)); \ 177 _C_LABEL(x): 178 179 /* 180 * NESTED 181 * A function calls other functions and needs 182 * therefore stack space to save/restore registers. 183 */ 184 #define NESTED(x, fsize, retpc) \ 185 .globl _C_LABEL(x); \ 186 .ent _C_LABEL(x), 0; \ 187 _C_LABEL(x): ; \ 188 .frame sp, fsize, retpc; \ 189 MCOUNT 190 191 /* 192 * NESTED_NOPROFILE(x) 193 * No profilable nested routine. 194 */ 195 #define NESTED_NOPROFILE(x, fsize, retpc) \ 196 .globl _C_LABEL(x); \ 197 .ent _C_LABEL(x), 0; \ 198 _C_LABEL(x): ; \ 199 .frame sp, fsize, retpc 200 201 /* 202 * XNESTED 203 * declare alternate entry point to nested routine. 204 */ 205 #define XNESTED(x) \ 206 .globl _C_LABEL(x); \ 207 AENT (_C_LABEL(x)); \ 208 _C_LABEL(x): 209 210 /* 211 * END 212 * Mark end of a procedure. 213 */ 214 #define END(x) \ 215 .end _C_LABEL(x) 216 217 /* 218 * IMPORT -- import external symbol 219 */ 220 #define IMPORT(sym, size) \ 221 .extern _C_LABEL(sym),size 222 223 /* 224 * EXPORT -- export definition of symbol 225 */ 226 #define EXPORT(x) \ 227 .globl _C_LABEL(x); \ 228 _C_LABEL(x): 229 230 /* 231 * VECTOR 232 * exception vector entrypoint 233 * XXX: regmask should be used to generate .mask 234 */ 235 #define VECTOR(x, regmask) \ 236 .ent _C_LABEL(x),0; \ 237 EXPORT(x); \ 238 239 #ifdef __STDC__ 240 #define VECTOR_END(x) \ 241 EXPORT(x ## End); \ 242 END(x) 243 #else 244 #define VECTOR_END(x) \ 245 EXPORT(x/**/End); \ 246 END(x) 247 #endif 248 249 /* 250 * Macros to panic and printf from assembly language. 251 */ 252 #define PANIC(msg) \ 253 la a0, 9f; \ 254 jal _C_LABEL(panic); \ 255 nop; \ 256 MSG(msg) 257 258 #define PRINTF(msg) \ 259 la a0, 9f; \ 260 jal _C_LABEL(printf); \ 261 nop; \ 262 MSG(msg) 263 264 #define MSG(msg) \ 265 .rdata; \ 266 9: .asciiz msg; \ 267 .text 268 269 #define ASMSTR(str) \ 270 .asciiz str; \ 271 .align 3 272 273 /* 274 * XXX retain dialects XXX 275 */ 276 #define ALEAF(x) XLEAF(x) 277 #define NLEAF(x) LEAF_NOPROFILE(x) 278 #define NON_LEAF(x, fsize, retpc) NESTED(x, fsize, retpc) 279 #define NNON_LEAF(x, fsize, retpc) NESTED_NOPROFILE(x, fsize, retpc) 280 281 /* 282 * standard callframe { 283 * register_t cf_args[4]; arg0 - arg3 284 * register_t cf_sp; frame pointer 285 * register_t cf_ra; return address 286 * }; 287 */ 288 #define CALLFRAME_SIZ (4 * (4 + 2)) 289 #define CALLFRAME_SP (4 * 4) 290 #define CALLFRAME_RA (4 * 5) 291 292 /* 293 * While it would be nice to be compatible with the SGI 294 * REG_L and REG_S macros, because they do not take parameters, it 295 * is impossible to use them with the _MIPS_SIM_ABIX32 model. 296 * 297 * These macros hide the use of mips3 instructions from the 298 * assembler to prevent the assembler from generating 64-bit style 299 * ABI calls. 300 */ 301 302 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 303 #define REG_L lw 304 #define REG_S sw 305 #define REG_LI li 306 #define REG_PROLOGUE .set push 307 #define REG_EPILOGUE .set pop 308 #define SZREG 4 309 #else 310 #define REG_L ld 311 #define REG_S sd 312 #define REG_LI dli 313 #define REG_PROLOGUE .set push ; .set mips3 314 #define REG_EPILOGUE .set pop 315 #define SZREG 8 316 #endif /* _MIPS_BSD_API */ 317 318 /* 319 * The DYNAMIC_STATUS_MASK option adds an additional masking operation 320 * when updating the hardware interrupt mask in the status register. 321 * 322 * This is useful for platforms that need to at run-time mask 323 * interrupts based on motherboard configuration or to handle 324 * slowly clearing interrupts. 325 * 326 * XXX this is only currently implemented for mips3. 327 */ 328 #ifdef MIPS_DYNAMIC_STATUS_MASK 329 #define DYNAMIC_STATUS_MASK(sr,scratch) \ 330 lw scratch, mips_dynamic_status_mask; \ 331 and sr, sr, scratch 332 333 #define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) \ 334 ori sr, (MIPS_INT_MASK | MIPS_SR_INT_IE); \ 335 DYNAMIC_STATUS_MASK(sr,scratch1) 336 #else 337 #define DYNAMIC_STATUS_MASK(sr,scratch) 338 #define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) 339 #endif 340 341 /* See lock_stubs.S. */ 342 #define MIPS_LOCK_RAS_SIZE 128 343 344 #define CPUVAR(off) _C_LABEL(cpu_info_store)+__CONCAT(CPU_INFO_,off) 345 346 #endif /* _MIPS_ASM_H */ 347
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