asm.h revision 1.31
1 /* $NetBSD: asm.h,v 1.31 2002/05/13 01:39:17 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 #endif 115 116 /* 117 * WARN_REFERENCES: create a warning if the specified symbol is referenced 118 * (ELF only, and thus, no leading underscores). 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 * XLEAF 154 * declare alternate entry to leaf routine 155 */ 156 #define XLEAF(x) \ 157 .globl _C_LABEL(x); \ 158 AENT (_C_LABEL(x)); \ 159 _C_LABEL(x): 160 161 /* 162 * NESTED 163 * A function calls other functions and needs 164 * therefore stack space to save/restore registers. 165 */ 166 #define NESTED(x, fsize, retpc) \ 167 .globl _C_LABEL(x); \ 168 .ent _C_LABEL(x), 0; \ 169 _C_LABEL(x): ; \ 170 .frame sp, fsize, retpc; \ 171 MCOUNT 172 173 /* 174 * NESTED_NOPROFILE(x) 175 * No profilable nested routine. 176 */ 177 #define NESTED_NOPROFILE(x, fsize, retpc) \ 178 .globl _C_LABEL(x); \ 179 .ent _C_LABEL(x), 0; \ 180 _C_LABEL(x): ; \ 181 .frame sp, fsize, retpc 182 183 /* 184 * XNESTED 185 * declare alternate entry point to nested routine. 186 */ 187 #define XNESTED(x) \ 188 .globl _C_LABEL(x); \ 189 AENT (_C_LABEL(x)); \ 190 _C_LABEL(x): 191 192 /* 193 * END 194 * Mark end of a procedure. 195 */ 196 #define END(x) \ 197 .end _C_LABEL(x) 198 199 /* 200 * IMPORT -- import external symbol 201 */ 202 #define IMPORT(sym, size) \ 203 .extern _C_LABEL(sym),size 204 205 /* 206 * EXPORT -- export definition of symbol 207 */ 208 #define EXPORT(x) \ 209 .globl _C_LABEL(x); \ 210 _C_LABEL(x): 211 212 /* 213 * VECTOR 214 * exception vector entrypoint 215 * XXX: regmask should be used to generate .mask 216 */ 217 #define VECTOR(x, regmask) \ 218 .ent _C_LABEL(x),0; \ 219 EXPORT(x); \ 220 221 #ifdef __STDC__ 222 #define VECTOR_END(x) \ 223 EXPORT(x ## End); \ 224 END(x) 225 #else 226 #define VECTOR_END(x) \ 227 EXPORT(x/**/End); \ 228 END(x) 229 #endif 230 231 /* 232 * Macros to panic and printf from assembly language. 233 */ 234 #define PANIC(msg) \ 235 la a0, 9f; \ 236 jal _C_LABEL(panic); \ 237 nop; \ 238 MSG(msg) 239 240 #define PRINTF(msg) \ 241 la a0, 9f; \ 242 jal _C_LABEL(printf); \ 243 nop; \ 244 MSG(msg) 245 246 #define MSG(msg) \ 247 .rdata; \ 248 9: .asciiz msg; \ 249 .text 250 251 #define ASMSTR(str) \ 252 .asciiz str; \ 253 .align 3 254 255 /* 256 * XXX retain dialects XXX 257 */ 258 #define ALEAF(x) XLEAF(x) 259 #define NLEAF(x) LEAF_NOPROFILE(x) 260 #define NON_LEAF(x, fsize, retpc) NESTED(x, fsize, retpc) 261 #define NNON_LEAF(x, fsize, retpc) NESTED_NOPROFILE(x, fsize, retpc) 262 263 /* 264 * standard callframe { 265 * register_t cf_args[4]; arg0 - arg3 266 * register_t cf_sp; frame pointer 267 * register_t cf_ra; return address 268 * }; 269 */ 270 #define CALLFRAME_SIZ (4 * (4 + 2)) 271 #define CALLFRAME_SP (4 * 4) 272 #define CALLFRAME_RA (4 * 5) 273 274 /* 275 * While it would be nice to be compatible with the SGI 276 * REG_L and REG_S macros, because they do not take parameters, it 277 * is impossible to use them with the _MIPS_SIM_ABIX32 model. 278 * 279 * These macros hide the use of mips3 instructions from the 280 * assembler to prevent the assembler from generating 64-bit style 281 * ABI calls. 282 */ 283 284 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 285 #define REG_L lw 286 #define REG_S sw 287 #define REG_LI li 288 #define REG_PROLOGUE .set push 289 #define REG_EPILOGUE .set pop 290 #define SZREG 4 291 #else 292 #define REG_L ld 293 #define REG_S sd 294 #define REG_LI dli 295 #define REG_PROLOGUE .set push ; .set mips3 296 #define REG_EPILOGUE .set pop 297 #define SZREG 8 298 #endif /* _MIPS_BSD_API */ 299 300 /* 301 * The DYNAMIC_STATUS_MASK option adds an additional masking operation 302 * when updating the hardware interrupt mask in the status register. 303 * 304 * This is useful for platforms that need to at run-time mask 305 * interrupts based on motherboard configuration or to handle 306 * slowly clearing interrupts. 307 * 308 * XXX this is only currently implemented for mips3. 309 */ 310 #ifdef MIPS_DYNAMIC_STATUS_MASK 311 #define DYNAMIC_STATUS_MASK(sr,scratch) \ 312 lw scratch, mips_dynamic_status_mask; \ 313 and sr, sr, scratch 314 315 #define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) \ 316 ori sr, (MIPS_INT_MASK | MIPS_SR_INT_IE); \ 317 DYNAMIC_STATUS_MASK(sr,scratch1) 318 #else 319 #define DYNAMIC_STATUS_MASK(sr,scratch) 320 #define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) 321 #endif 322 323 #endif /* _MIPS_ASM_H */ 324
Indexes created Wed Sep 24 14:09:57 GMT 2025