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 #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 PANIC(msg)                                      \
  96                 .set    push;                           \
  97                 .set    reorder;                        \
  98                 PTR_LA  a0, 8f;                          \
  99                 jal     panic;                          \
 100 9:              b       9b;                             \
 101                 .set    pop;                            \
 102                 TEXT(msg)
 103
 104 /*
 105  * Print formatted string
 106  */
 107 #ifdef CONFIG_PRINTK
 108 #define PRINT(string)                                   \
 109                 .set    push;                           \
 110                 .set    reorder;                        \
 111                 PTR_LA  a0, 8f;                          \
 112                 jal     printk;                         \
 113                 .set    pop;                            \
 114                 TEXT(string)
 115 #else
 116 #define PRINT(string)
 117 #endif
 118
 119 #define TEXT(msg)                                       \
 120                 .pushsection .data;                     \
 121 8:              .asciiz msg;                            \
 122                 .popsection;
 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 #define LONG            .word
 224 #define LONGSIZE        4
 225 #define LONGMASK        3
 226 #define LONGLOG         2
 227 #endif
 228
 229 #if (_MIPS_SZLONG == 64)
 230 #define LONG_ADD        dadd
 231 #define LONG_ADDU       daddu
 232 #define LONG_ADDI       daddi
 233 #define LONG_ADDIU      daddiu
 234 #define LONG_SUB        dsub
 235 #define LONG_SUBU       dsubu
 236 #define LONG_L          ld
 237 #define LONG_S          sd
 238 #define LONG_SP         sdp
 239 #define LONG_SLL        dsll
 240 #define LONG_SLLV       dsllv
 241 #define LONG_SRL        dsrl
 242 #define LONG_SRLV       dsrlv
 243 #define LONG_SRA        dsra
 244 #define LONG_SRAV       dsrav
 245
 246 #define LONG            .dword
 247 #define LONGSIZE        8
 248 #define LONGMASK        7
 249 #define LONGLOG         3
 250 #endif
 251
 252 /*
 253  * How to add/sub/load/store/shift pointers.
 254  */
 255 #if (_MIPS_SZPTR == 32)
 256 #define PTR_ADD         add
 257 #define PTR_ADDU        addu
 258 #define PTR_ADDI        addi
 259 #define PTR_ADDIU       addiu
 260 #define PTR_SUB         sub
 261 #define PTR_SUBU        subu
 262 #define PTR_L           lw
 263 #define PTR_S           sw
 264 #define PTR_LA          la
 265 #define PTR_LI          li
 266 #define PTR_SLL         sll
 267 #define PTR_SLLV        sllv
 268 #define PTR_SRL         srl
 269 #define PTR_SRLV        srlv
 270 #define PTR_SRA         sra
 271 #define PTR_SRAV        srav
 272
 273 #define PTR_SCALESHIFT  2
 274
 275 #define PTR             .word
 276 #define PTRSIZE         4
 277 #define PTRLOG          2
 278 #endif
 279
 280 #if (_MIPS_SZPTR == 64)
 281 #define PTR_ADD         dadd
 282 #define PTR_ADDU        daddu
 283 #define PTR_ADDI        daddi
 284 #define PTR_ADDIU       daddiu
 285 #define PTR_SUB         dsub
 286 #define PTR_SUBU        dsubu
 287 #define PTR_L           ld
 288 #define PTR_S           sd
 289 #define PTR_LA          dla
 290 #define PTR_LI          dli
 291 #define PTR_SLL         dsll
 292 #define PTR_SLLV        dsllv
 293 #define PTR_SRL         dsrl
 294 #define PTR_SRLV        dsrlv
 295 #define PTR_SRA         dsra
 296 #define PTR_SRAV        dsrav
 297
 298 #define PTR_SCALESHIFT  3
 299
 300 #define PTR             .dword
 301 #define PTRSIZE         8
 302 #define PTRLOG          3
 303 #endif
 304
 305 /*
 306  * Some cp0 registers were extended to 64bit for MIPS III.
 307  */
 308 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
 309 #define MFC0            mfc0
 310 #define MTC0            mtc0
 311 #endif
 312 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 313 #define MFC0            dmfc0
 314 #define MTC0            dmtc0
 315 #endif
 316
 317 #define SSNOP           sll zero, zero, 1
 318
 319 #ifdef CONFIG_SGI_IP28
 320 /* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */
 321 #include <asm/cacheops.h>
 322 #define R10KCBARRIER(addr)  cache   Cache_Barrier, addr;
 323 #else
 324 #define R10KCBARRIER(addr)
 325 #endif
 326
 327 #endif /* __ASM_ASM_H */