1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle 7 * Copyright (C) 1999 by Silicon Graphics, Inc. 8 * Copyright (C) 2001 MIPS Technologies, Inc. 9 * Copyright (C) 2002 Maciej W. Rozycki 10 * 11 * Some useful macros for MIPS assembler code 12 * 13 * Some of the routines below contain useless nops that will be optimized 14 * away by gas in -O mode. These nops are however required to fill delay 15 * slots in noreorder mode. 16 */ 17 #ifndef __ASM_ASM_H 18 #define __ASM_ASM_H 19 20 #include <asm/sgidefs.h> 21 #include <asm/asm-eva.h> 22 23 /* 24 * LEAF - declare leaf routine 25 */ 26 #define LEAF(symbol) \ 27 .globl symbol; \ 28 .align 2; \ 29 .type symbol, @function; \ 30 .ent symbol, 0; \ 31 symbol: .frame sp, 0, ra; \ 32 .cfi_startproc; \ 33 .insn 34 35 /* 36 * NESTED - declare nested routine entry point 37 */ 38 #define NESTED(symbol, framesize, rpc) \ 39 .globl symbol; \ 40 .align 2; \ 41 .type symbol, @function; \ 42 .ent symbol, 0; \ 43 symbol: .frame sp, framesize, rpc; \ 44 .cfi_startproc; \ 45 .insn 46 47 /* 48 * END - mark end of function 49 */ 50 #define END(function) \ 51 .cfi_endproc; \ 52 .end function; \ 53 .size function, .-function 54 55 /* 56 * EXPORT - export definition of symbol 57 */ 58 #define EXPORT(symbol) \ 59 .globl symbol; \ 60 symbol: 61 62 /* 63 * FEXPORT - export definition of a function symbol 64 */ 65 #define FEXPORT(symbol) \ 66 .globl symbol; \ 67 .type symbol, @function; \ 68 symbol: .insn 69 70 /* 71 * ABS - export absolute symbol 72 */ 73 #define ABS(symbol,value) \ 74 .globl symbol; \ 75 symbol = value 76 77 #define PANIC(msg) \ 78 .set push; \ 79 .set reorder; \ 80 PTR_LA a0, 8f; \ 81 jal panic; \ 82 9: b 9b; \ 83 .set pop; \ 84 TEXT(msg) 85 86 /* 87 * Print formatted string 88 */ 89 #ifdef CONFIG_PRINTK 90 #define PRINT(string) \ 91 .set push; \ 92 .set reorder; \ 93 PTR_LA a0, 8f; \ 94 jal printk; \ 95 .set pop; \ 96 TEXT(string) 97 #else 98 #define PRINT(string) 99 #endif 100 101 #define TEXT(msg) \ 102 .pushsection .data; \ 103 8: .asciiz msg; \ 104 .popsection; 105 106 /* 107 * Stack alignment 108 */ 109 #if (_MIPS_SIM == _MIPS_SIM_ABI32) 110 #define ALSZ 7 111 #define ALMASK ~7 112 #endif 113 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64) 114 #define ALSZ 15 115 #define ALMASK ~15 116 #endif 117 118 /* 119 * Macros to handle different pointer/register sizes for 32/64-bit code 120 */ 121 122 /* 123 * Size of a register 124 */ 125 #ifdef __mips64 126 #define SZREG 8 127 #else 128 #define SZREG 4 129 #endif 130 131 /* 132 * Use the following macros in assemblercode to load/store registers, 133 * pointers etc. 134 */ 135 #if (_MIPS_SIM == _MIPS_SIM_ABI32) 136 #define REG_S sw 137 #define REG_L lw 138 #define REG_SUBU subu 139 #define REG_ADDU addu 140 #endif 141 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64) 142 #define REG_S sd 143 #define REG_L ld 144 #define REG_SUBU dsubu 145 #define REG_ADDU daddu 146 #endif 147 148 /* 149 * How to add/sub/load/store/shift C int variables. 150 */ 151 #if (_MIPS_SZINT == 32) 152 #define INT_ADD add 153 #define INT_ADDU addu 154 #define INT_ADDI addi 155 #define INT_ADDIU addiu 156 #define INT_SUB sub 157 #define INT_SUBU subu 158 #define INT_L lw 159 #define INT_S sw 160 #define INT_SLL sll 161 #define INT_SLLV sllv 162 #define INT_SRL srl 163 #define INT_SRLV srlv 164 #define INT_SRA sra 165 #define INT_SRAV srav 166 #endif 167 168 #if (_MIPS_SZINT == 64) 169 #define INT_ADD dadd 170 #define INT_ADDU daddu 171 #define INT_ADDI daddi 172 #define INT_ADDIU daddiu 173 #define INT_SUB dsub 174 #define INT_SUBU dsubu 175 #define INT_L ld 176 #define INT_S sd 177 #define INT_SLL dsll 178 #define INT_SLLV dsllv 179 #define INT_SRL dsrl 180 #define INT_SRLV dsrlv 181 #define INT_SRA dsra 182 #define INT_SRAV dsrav 183 #endif 184 185 /* 186 * How to add/sub/load/store/shift C long variables. 187 */ 188 #if (_MIPS_SZLONG == 32) 189 #define LONG_ADD add 190 #define LONG_ADDU addu 191 #define LONG_ADDI addi 192 #define LONG_ADDIU addiu 193 #define LONG_SUB sub 194 #define LONG_SUBU subu 195 #define LONG_L lw 196 #define LONG_S sw 197 #define LONG_SP swp 198 #define LONG_SLL sll 199 #define LONG_SLLV sllv 200 #define LONG_SRL srl 201 #define LONG_SRLV srlv 202 #define LONG_SRA sra 203 #define LONG_SRAV srav 204 205 #define LONG .word 206 #define LONGSIZE 4 207 #define LONGMASK 3 208 #define LONGLOG 2 209 #endif 210 211 #if (_MIPS_SZLONG == 64) 212 #define LONG_ADD dadd 213 #define LONG_ADDU daddu 214 #define LONG_ADDI daddi 215 #define LONG_ADDIU daddiu 216 #define LONG_SUB dsub 217 #define LONG_SUBU dsubu 218 #define LONG_L ld 219 #define LONG_S sd 220 #define LONG_SP sdp 221 #define LONG_SLL dsll 222 #define LONG_SLLV dsllv 223 #define LONG_SRL dsrl 224 #define LONG_SRLV dsrlv 225 #define LONG_SRA dsra 226 #define LONG_SRAV dsrav 227 228 #define LONG .dword 229 #define LONGSIZE 8 230 #define LONGMASK 7 231 #define LONGLOG 3 232 #endif 233 234 /* 235 * How to add/sub/load/store/shift pointers. 236 */ 237 #if (_MIPS_SZPTR == 32) 238 #define PTR_ADD add 239 #define PTR_ADDU addu 240 #define PTR_ADDI addi 241 #define PTR_ADDIU addiu 242 #define PTR_SUB sub 243 #define PTR_SUBU subu 244 #define PTR_L lw 245 #define PTR_S sw 246 #define PTR_LA la 247 #define PTR_LI li 248 #define PTR_SLL sll 249 #define PTR_SLLV sllv 250 #define PTR_SRL srl 251 #define PTR_SRLV srlv 252 #define PTR_SRA sra 253 #define PTR_SRAV srav 254 255 #define PTR_SCALESHIFT 2 256 257 #define PTR .word 258 #define PTRSIZE 4 259 #define PTRLOG 2 260 #endif 261 262 #if (_MIPS_SZPTR == 64) 263 #define PTR_ADD dadd 264 #define PTR_ADDU daddu 265 #define PTR_ADDI daddi 266 #define PTR_ADDIU daddiu 267 #define PTR_SUB dsub 268 #define PTR_SUBU dsubu 269 #define PTR_L ld 270 #define PTR_S sd 271 #define PTR_LA dla 272 #define PTR_LI dli 273 #define PTR_SLL dsll 274 #define PTR_SLLV dsllv 275 #define PTR_SRL dsrl 276 #define PTR_SRLV dsrlv 277 #define PTR_SRA dsra 278 #define PTR_SRAV dsrav 279 280 #define PTR_SCALESHIFT 3 281 282 #define PTR .dword 283 #define PTRSIZE 8 284 #define PTRLOG 3 285 #endif 286 287 /* 288 * Some cp0 registers were extended to 64bit for MIPS III. 289 */ 290 #if (_MIPS_SIM == _MIPS_SIM_ABI32) 291 #define MFC0 mfc0 292 #define MTC0 mtc0 293 #endif 294 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64) 295 #define MFC0 dmfc0 296 #define MTC0 dmtc0 297 #endif 298 299 #define SSNOP sll zero, zero, 1 300 301 #ifdef CONFIG_SGI_IP28 302 /* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */ 303 #include <asm/cacheops.h> 304 #define R10KCBARRIER(addr) cache Cache_Barrier, addr; 305 #else 306 #define R10KCBARRIER(addr) 307 #endif 308 309 #endif /* __ASM_ASM_H */ 310