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 #ifndef __VDSO__ 24 /* 25 * Emit CFI data in .debug_frame sections, not .eh_frame sections. 26 * We don't do DWARF unwinding at runtime, so only the offline DWARF 27 * information is useful to anyone. Note we should change this if we 28 * ever decide to enable DWARF unwinding at runtime. 29 */ 30 #define CFI_SECTIONS .cfi_sections .debug_frame 31 #else 32 /* 33 * For the vDSO, emit both runtime unwind information and debug 34 * symbols for the .dbg file. 35 */ 36 #define CFI_SECTIONS 37 #endif 38 39 /* 40 * LEAF - declare leaf routine 41 */ 42 #define LEAF(symbol) \ 43 CFI_SECTIONS; \ 44 .globl symbol; \ 45 .align 2; \ 46 .type symbol, @function; \ 47 .ent symbol, 0; \ 48 symbol: .frame sp, 0, ra; \ 49 .cfi_startproc; \ 50 .insn 51 52 /* 53 * NESTED - declare nested routine entry point 54 */ 55 #define NESTED(symbol, framesize, rpc) \ 56 CFI_SECTIONS; \ 57 .globl symbol; \ 58 .align 2; \ 59 .type symbol, @function; \ 60 .ent symbol, 0; \ 61 symbol: .frame sp, framesize, rpc; \ 62 .cfi_startproc; \ 63 .insn 64 65 /* 66 * END - mark end of function 67 */ 68 #define END(function) \ 69 .cfi_endproc; \ 70 .end function; \ 71 .size function, .-function 72 73 /* 74 * EXPORT - export definition of symbol 75 */ 76 #define EXPORT(symbol) \ 77 .globl symbol; \ 78 symbol: 79 80 /* 81 * FEXPORT - export definition of a function symbol 82 */ 83 #define FEXPORT(symbol) \ 84 .globl symbol; \ 85 .type symbol, @function; \ 86 symbol: .insn 87 88 /* 89 * ABS - export absolute symbol 90 */ 91 #define ABS(symbol,value) \ 92 .globl symbol; \ 93 symbol = value 94 95 #define TEXT(msg) \ 96 .pushsection .data; \ 97 8: .asciiz msg; \ 98 .popsection; 99 100 #define ASM_PANIC(msg) \ 101 .set push; \ 102 .set reorder; \ 103 PTR_LA a0, 8f; \ 104 jal panic; \ 105 9: b 9b; \ 106 .set pop; \ 107 TEXT(msg) 108 109 /* 110 * Print formatted string 111 */ 112 #ifdef CONFIG_PRINTK 113 #define ASM_PRINT(string) \ 114 .set push; \ 115 .set reorder; \ 116 PTR_LA a0, 8f; \ 117 jal _printk; \ 118 .set pop; \ 119 TEXT(string) 120 #else 121 #define ASM_PRINT(string) 122 #endif 123 124 /* 125 * Stack alignment 126 */ 127 #if (_MIPS_SIM == _MIPS_SIM_ABI32) 128 #define ALSZ 7 129 #define ALMASK ~7 130 #endif 131 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64) 132 #define ALSZ 15 133 #define ALMASK ~15 134 #endif 135 136 /* 137 * Macros to handle different pointer/register sizes for 32/64-bit code 138 */ 139 140 /* 141 * Size of a register 142 */ 143 #ifdef __mips64 144 #define SZREG 8 145 #else 146 #define SZREG 4 147 #endif 148 149 /* 150 * Use the following macros in assemblercode to load/store registers, 151 * pointers etc. 152 */ 153 #if (_MIPS_SIM == _MIPS_SIM_ABI32) 154 #define REG_S sw 155 #define REG_L lw 156 #define REG_SUBU subu 157 #define REG_ADDU addu 158 #endif 159 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64) 160 #define REG_S sd 161 #define REG_L ld 162 #define REG_SUBU dsubu 163 #define REG_ADDU daddu 164 #endif 165 166 /* 167 * How to add/sub/load/store/shift C int variables. 168 */ 169 #if (_MIPS_SZINT == 32) 170 #define INT_ADD add 171 #define INT_ADDU addu 172 #define INT_ADDI addi 173 #define INT_ADDIU addiu 174 #define INT_SUB sub 175 #define INT_SUBU subu 176 #define INT_L lw 177 #define INT_S sw 178 #define INT_SLL sll 179 #define INT_SLLV sllv 180 #define INT_SRL srl 181 #define INT_SRLV srlv 182 #define INT_SRA sra 183 #define INT_SRAV srav 184 #endif 185 186 #if (_MIPS_SZINT == 64) 187 #define INT_ADD dadd 188 #define INT_ADDU daddu 189 #define INT_ADDI daddi 190 #define INT_ADDIU daddiu 191 #define INT_SUB dsub 192 #define INT_SUBU dsubu 193 #define INT_L ld 194 #define INT_S sd 195 #define INT_SLL dsll 196 #define INT_SLLV dsllv 197 #define INT_SRL dsrl 198 #define INT_SRLV dsrlv 199 #define INT_SRA dsra 200 #define INT_SRAV dsrav 201 #endif 202 203 /* 204 * How to add/sub/load/store/shift C long variables. 205 */ 206 #if (_MIPS_SZLONG == 32) 207 #define LONG_ADD add 208 #define LONG_ADDU addu 209 #define LONG_ADDI addi 210 #define LONG_ADDIU addiu 211 #define LONG_SUB sub 212 #define LONG_SUBU subu 213 #define LONG_L lw 214 #define LONG_S sw 215 #define LONG_SP swp 216 #define LONG_SLL sll 217 #define LONG_SLLV sllv 218 #define LONG_SRL srl 219 #define LONG_SRLV srlv 220 #define LONG_SRA sra 221 #define LONG_SRAV srav 222 223 #ifdef __ASSEMBLY__ 224 #define LONG .word 225 #endif 226 #define LONGSIZE 4 227 #define LONGMASK 3 228 #define LONGLOG 2 229 #endif 230 231 #if (_MIPS_SZLONG == 64) 232 #define LONG_ADD dadd 233 #define LONG_ADDU daddu 234 #define LONG_ADDI daddi 235 #define LONG_ADDIU daddiu 236 #define LONG_SUB dsub 237 #define LONG_SUBU dsubu 238 #define LONG_L ld 239 #define LONG_S sd 240 #define LONG_SP sdp 241 #define LONG_SLL dsll 242 #define LONG_SLLV dsllv 243 #define LONG_SRL dsrl 244 #define LONG_SRLV dsrlv 245 #define LONG_SRA dsra 246 #define LONG_SRAV dsrav 247 248 #ifdef __ASSEMBLY__ 249 #define LONG .dword 250 #endif 251 #define LONGSIZE 8 252 #define LONGMASK 7 253 #define LONGLOG 3 254 #endif 255 256 /* 257 * How to add/sub/load/store/shift pointers. 258 */ 259 #if (_MIPS_SZPTR == 32) 260 #define PTR_ADD add 261 #define PTR_ADDU addu 262 #define PTR_ADDI addi 263 #define PTR_ADDIU addiu 264 #define PTR_SUB sub 265 #define PTR_SUBU subu 266 #define PTR_L lw 267 #define PTR_S sw 268 #define PTR_LA la 269 #define PTR_LI li 270 #define PTR_SLL sll 271 #define PTR_SLLV sllv 272 #define PTR_SRL srl 273 #define PTR_SRLV srlv 274 #define PTR_SRA sra 275 #define PTR_SRAV srav 276 277 #define PTR_SCALESHIFT 2 278 279 #define PTR .word 280 #define PTRSIZE 4 281 #define PTRLOG 2 282 #endif 283 284 #if (_MIPS_SZPTR == 64) 285 #define PTR_ADD dadd 286 #define PTR_ADDU daddu 287 #define PTR_ADDI daddi 288 #define PTR_ADDIU daddiu 289 #define PTR_SUB dsub 290 #define PTR_SUBU dsubu 291 #define PTR_L ld 292 #define PTR_S sd 293 #define PTR_LA dla 294 #define PTR_LI dli 295 #define PTR_SLL dsll 296 #define PTR_SLLV dsllv 297 #define PTR_SRL dsrl 298 #define PTR_SRLV dsrlv 299 #define PTR_SRA dsra 300 #define PTR_SRAV dsrav 301 302 #define PTR_SCALESHIFT 3 303 304 #define PTR .dword 305 #define PTRSIZE 8 306 #define PTRLOG 3 307 #endif 308 309 /* 310 * Some cp0 registers were extended to 64bit for MIPS III. 311 */ 312 #if (_MIPS_SIM == _MIPS_SIM_ABI32) 313 #define MFC0 mfc0 314 #define MTC0 mtc0 315 #endif 316 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64) 317 #define MFC0 dmfc0 318 #define MTC0 dmtc0 319 #endif 320 321 #define SSNOP sll zero, zero, 1 322 323 #ifdef CONFIG_SGI_IP28 324 /* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */ 325 #include <asm/cacheops.h> 326 #define R10KCBARRIER(addr) cache Cache_Barrier, addr; 327 #else 328 #define R10KCBARRIER(addr) 329 #endif 330 331 #endif /* __ASM_ASM_H */ 332