arch/mips/include/asm/asm.h

   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 */