asm.h revision 1.34
1 /* $NetBSD: asm.h,v 1.34 2003/06/27 08:22:05 simonb 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR 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 * @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 /* 42 * machAsmDefs.h -- 43 * 44 * Macros used when writing assembler programs. 45 * 46 * Copyright (C) 1989 Digital Equipment Corporation. 47 * Permission to use, copy, modify, and distribute this software and 48 * its documentation for any purpose and without fee is hereby granted, 49 * provided that the above copyright notice appears in all copies. 50 * Digital Equipment Corporation makes no representations about the 51 * suitability of this software for any purpose. It is provided "as is" 52 * without express or implied warranty. 53 * 54 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h, 55 * v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL) 56 */ 57 58 #ifndef _MIPS_ASM_H 59 #define _MIPS_ASM_H 60 61 #include <machine/cdefs.h> /* for API selection */ 62 #include <mips/regdef.h> 63 64 /* 65 * Define -pg profile entry code. 66 * Must always be noreorder, must never use a macro instruction 67 * Final addiu to t9 must always equal the size of this _KERN_MCOUNT 68 */ 69 #define _KERN_MCOUNT \ 70 .set push; \ 71 .set noreorder; \ 72 .set noat; \ 73 subu sp,sp,16; \ 74 sw t9,12(sp); \ 75 move AT,ra; \ 76 lui t9,%hi(_mcount); \ 77 addiu t9,t9,%lo(_mcount); \ 78 jalr t9; \ 79 nop; \ 80 lw t9,4(sp); \ 81 addiu sp,sp,8; \ 82 addiu t9,t9,40; \ 83 .set pop; 84 85 #ifdef GPROF 86 #define MCOUNT _KERN_MCOUNT 87 #else 88 #define MCOUNT 89 #endif 90 91 #ifdef __NO_LEADING_UNDERSCORES__ 92 # define _C_LABEL(x) x 93 #else 94 # ifdef __STDC__ 95 # define _C_LABEL(x) _ ## x 96 # else 97 # define _C_LABEL(x) _/**/x 98 # endif 99 #endif 100 101 #ifdef USE_AENT 102 #define AENT(x) \ 103 .aent x, 0 104 #else 105 #define AENT(x) 106 #endif 107 108 /* 109 * WEAK_ALIAS: create a weak alias. 110 */ 111 #define WEAK_ALIAS(alias,sym) \ 112 .weak alias; \ 113 alias = sym 114 115 /* 116 * WARN_REFERENCES: create a warning if the specified symbol is referenced. 117 */ 118 #ifdef __STDC__ 119 #define WARN_REFERENCES(_sym,_msg) \ 120 .section .gnu.warning. ## _sym ; .ascii _msg ; .text 121 #else 122 #define WARN_REFERENCES(_sym,_msg) \ 123 .section .gnu.warning./**/_sym ; .ascii _msg ; .text 124 #endif /* __STDC__ */ 125 126 /* 127 * LEAF 128 * A leaf routine does 129 * - call no other function, 130 * - never use any register that callee-saved (S0-S8), and 131 * - not use any local stack storage. 132 */ 133 #define LEAF(x) \ 134 .globl _C_LABEL(x); \ 135 .ent _C_LABEL(x), 0; \ 136 _C_LABEL(x): ; \ 137 .frame sp, 0, ra; \ 138 MCOUNT 139 140 /* 141 * LEAF_NOPROFILE 142 * No profilable leaf routine. 143 */ 144 #define LEAF_NOPROFILE(x) \ 145 .globl _C_LABEL(x); \ 146 .ent _C_LABEL(x), 0; \ 147 _C_LABEL(x): ; \ 148 .frame sp, 0, ra 149 150 /* 151 * STATIC_LEAF 152 * Declare a local leaf function. 153 */ 154 #define STATIC_LEAF(x) \ 155 .ent _C_LABEL(x), 0; \ 156 _C_LABEL(x): ; \ 157 .frame sp, 0, ra; \ 158 MCOUNT 159 160 /* 161 * XLEAF 162 * declare alternate entry to leaf routine 163 */ 164 #define XLEAF(x) \ 165 .globl _C_LABEL(x); \ 166 AENT (_C_LABEL(x)); \ 167 _C_LABEL(x): 168 169 /* 170 * STATIC_XLEAF 171 * declare alternate entry to a static leaf routine 172 */ 173 #define STATIC_XLEAF(x) \ 174 AENT (_C_LABEL(x)); \ 175 _C_LABEL(x): 176 177 /* 178 * NESTED 179 * A function calls other functions and needs 180 * therefore stack space to save/restore registers. 181 */ 182 #define NESTED(x, fsize, retpc) \ 183 .globl _C_LABEL(x); \ 184 .ent _C_LABEL(x), 0; \ 185 _C_LABEL(x): ; \ 186 .frame sp, fsize, retpc; \ 187 MCOUNT 188 189 /* 190 * NESTED_NOPROFILE(x) 191 * No profilable nested routine. 192 */ 193 #define NESTED_NOPROFILE(x, fsize, retpc) \ 194 .globl _C_LABEL(x); \ 195 .ent _C_LABEL(x), 0; \ 196 _C_LABEL(x): ; \ 197 .frame sp, fsize, retpc 198 199 /* 200 * XNESTED 201 * declare alternate entry point to nested routine. 202 */ 203 #define XNESTED(x) \ 204 .globl _C_LABEL(x); \ 205 AENT (_C_LABEL(x)); \ 206 _C_LABEL(x): 207 208 /* 209 * END 210 * Mark end of a procedure. 211 */ 212 #define END(x) \ 213 .end _C_LABEL(x) 214 215 /* 216 * IMPORT -- import external symbol 217 */ 218 #define IMPORT(sym, size) \ 219 .extern _C_LABEL(sym),size 220 221 /* 222 * EXPORT -- export definition of symbol 223 */ 224 #define EXPORT(x) \ 225 .globl _C_LABEL(x); \ 226 _C_LABEL(x): 227 228 /* 229 * VECTOR 230 * exception vector entrypoint 231 * XXX: regmask should be used to generate .mask 232 */ 233 #define VECTOR(x, regmask) \ 234 .ent _C_LABEL(x),0; \ 235 EXPORT(x); \ 236 237 #ifdef __STDC__ 238 #define VECTOR_END(x) \ 239 EXPORT(x ## End); \ 240 END(x) 241 #else 242 #define VECTOR_END(x) \ 243 EXPORT(x/**/End); \ 244 END(x) 245 #endif 246 247 /* 248 * Macros to panic and printf from assembly language. 249 */ 250 #define PANIC(msg) \ 251 la a0, 9f; \ 252 jal _C_LABEL(panic); \ 253 nop; \ 254 MSG(msg) 255 256 #define PRINTF(msg) \ 257 la a0, 9f; \ 258 jal _C_LABEL(printf); \ 259 nop; \ 260 MSG(msg) 261 262 #define MSG(msg) \ 263 .rdata; \ 264 9: .asciiz msg; \ 265 .text 266 267 #define ASMSTR(str) \ 268 .asciiz str; \ 269 .align 3 270 271 /* 272 * XXX retain dialects XXX 273 */ 274 #define ALEAF(x) XLEAF(x) 275 #define NLEAF(x) LEAF_NOPROFILE(x) 276 #define NON_LEAF(x, fsize, retpc) NESTED(x, fsize, retpc) 277 #define NNON_LEAF(x, fsize, retpc) NESTED_NOPROFILE(x, fsize, retpc) 278 279 /* 280 * standard callframe { 281 * register_t cf_args[4]; arg0 - arg3 282 * register_t cf_sp; frame pointer 283 * register_t cf_ra; return address 284 * }; 285 */ 286 #define CALLFRAME_SIZ (4 * (4 + 2)) 287 #define CALLFRAME_SP (4 * 4) 288 #define CALLFRAME_RA (4 * 5) 289 290 /* 291 * While it would be nice to be compatible with the SGI 292 * REG_L and REG_S macros, because they do not take parameters, it 293 * is impossible to use them with the _MIPS_SIM_ABIX32 model. 294 * 295 * These macros hide the use of mips3 instructions from the 296 * assembler to prevent the assembler from generating 64-bit style 297 * ABI calls. 298 */ 299 300 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 301 #define REG_L lw 302 #define REG_S sw 303 #define REG_LI li 304 #define REG_PROLOGUE .set push 305 #define REG_EPILOGUE .set pop 306 #define SZREG 4 307 #else 308 #define REG_L ld 309 #define REG_S sd 310 #define REG_LI dli 311 #define REG_PROLOGUE .set push ; .set mips3 312 #define REG_EPILOGUE .set pop 313 #define SZREG 8 314 #endif /* _MIPS_BSD_API */ 315 316 /* 317 * The DYNAMIC_STATUS_MASK option adds an additional masking operation 318 * when updating the hardware interrupt mask in the status register. 319 * 320 * This is useful for platforms that need to at run-time mask 321 * interrupts based on motherboard configuration or to handle 322 * slowly clearing interrupts. 323 * 324 * XXX this is only currently implemented for mips3. 325 */ 326 #ifdef MIPS_DYNAMIC_STATUS_MASK 327 #define DYNAMIC_STATUS_MASK(sr,scratch) \ 328 lw scratch, mips_dynamic_status_mask; \ 329 and sr, sr, scratch 330 331 #define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) \ 332 ori sr, (MIPS_INT_MASK | MIPS_SR_INT_IE); \ 333 DYNAMIC_STATUS_MASK(sr,scratch1) 334 #else 335 #define DYNAMIC_STATUS_MASK(sr,scratch) 336 #define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) 337 #endif 338 339 #endif /* _MIPS_ASM_H */ 340
Indexes created Fri Sep 26 08:10:20 GMT 2025