LXR linux-old/include/asm-mips64/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 <linux/config.h>
  21#include <asm/sgidefs.h>
  22
  23#ifndef CAT
  24#ifdef __STDC__
  25#define __CAT(str1,str2) str1##str2
  26#else
  27#define __CAT(str1,str2) str1/**/str2
  28#endif
  29#define CAT(str1,str2) __CAT(str1,str2)
  30#endif
  31
  32/*
  33 * PIC specific declarations
  34 * Not used for the kernel but here seems to be the right place.
  35 */
  36#ifdef __PIC__
  37#define CPRESTORE(register)                             \
  38                .cprestore register
  39#define CPADD(register)                                 \
  40                .cpadd  register
  41#define CPLOAD(register)                                \
  42                .cpload register
  43#else
  44#define CPRESTORE(register)
  45#define CPADD(register)
  46#define CPLOAD(register)
  47#endif
  48
  49/*
  50 * LEAF - declare leaf routine
  51 */
  52#define LEAF(symbol)                                    \
  53                .globl  symbol;                         \
  54                .align  2;                              \
  55                .type   symbol,@function;               \
  56                .ent    symbol,0;                       \
  57symbol:         .frame  sp,0,ra
  58
  59/*
  60 * NESTED - declare nested routine entry point
  61 */
  62#define NESTED(symbol, framesize, rpc)                  \
  63                .globl  symbol;                         \
  64                .align  2;                              \
  65                .type   symbol,@function;               \
  66                .ent    symbol,0;                       \
  67symbol:         .frame  sp, framesize, rpc
  68
  69/*
  70 * END - mark end of function
  71 */
  72#define END(function)                                   \
  73                .end    function;                       \
  74                .size   function,.-function
  75
  76/*
  77 * EXPORT - export definition of symbol
  78 */
  79#define EXPORT(symbol)                                  \
  80                .globl  symbol;                         \
  81symbol:
  82
  83/*
  84 * FEXPORT - export definition of a function symbol
  85 */
  86#define FEXPORT(symbol)                                 \
  87                .globl  symbol;                         \
  88                .type   symbol,@function;               \
  89symbol:
  90
  91/*
  92 * ABS - export absolute symbol
  93 */
  94#define ABS(symbol,value)                               \
  95                .globl  symbol;                         \
  96symbol          =       value
  97
  98#define PANIC(msg)                                      \
  99                .set    push;                           \
 100                .set    reorder;                        \
 101                PTR_LA  a0,8f;                          \
 102                jal     panic;                          \
 1039:              b       9b;                             \
 104                .set    pop;                            \
 105                TEXT(msg)
 106
 107/*
 108 * Print formatted string
 109 */
 110#define PRINT(string)                                   \
 111                .set    push;                           \
 112                .set    reorder;                        \
 113                PTR_LA  a0,8f;                          \
 114                jal     printk;                         \
 115                .set    pop;                            \
 116                TEXT(string)
 117
 118#define TEXT(msg)                                       \
 119                .pushsection .data;                     \
 1208:              .asciiz msg;                            \
 121                .popsection;
 122
 123/*
 124 * Build text tables
 125 */
 126#define TTABLE(string)                                  \
 127                .pushsection .text;                     \
 128                .word   1f;                             \
 129                .popsection                             \
 130                .pushsection .data;                     \
 1311:              .asciiz string;                         \
 132                .popsection
 133
 134/*
 135 * MIPS IV pref instruction.
 136 * Use with .set noreorder only!
 137 *
 138 * MIPS IV implementations are free to treat this as a nop.  The R5000
 139 * is one of them.  So we should have an option not to use this instruction.
 140 */
 141#ifdef CONFIG_CPU_HAS_PREFETCH
 142
 143#define PREF(hint,addr)                                 \
 144                .set    push;                           \
 145                .set    mips4;                          \
 146                pref    hint,addr;                      \
 147                .set    pop
 148
 149#define PREFX(hint,addr)                                \
 150                .set    push;                           \
 151                .set    mips4;                          \
 152                prefx   hint,addr;                      \
 153                .set    pop
 154
 155#else /* !CONFIG_CPU_HAS_PREFETCH */
 156
 157#define PREF(hint,addr)
 158#define PREFX(hint,addr)
 159
 160#endif /* !CONFIG_CPU_HAS_PREFETCH */
 161
 162/*
 163 * MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs.
 164 */
 165#if (_MIPS_ISA == _MIPS_ISA_MIPS1)
 166#define MOVN(rd,rs,rt)                                  \
 167                .set    push;                           \
 168                .set    reorder;                        \
 169                beqz    rt,9f;                          \
 170                move    rd,rs;                          \
 171                .set    pop;                            \
 1729:
 173#define MOVZ(rd,rs,rt)                                  \
 174                .set    push;                           \
 175                .set    reorder;                        \
 176                bnez    rt,9f;                          \
 177                move    rd,rs;                          \
 178                .set    pop;                            \
 1799:
 180#endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */
 181#if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3)
 182#define MOVN(rd,rs,rt)                                  \
 183                .set    push;                           \
 184                .set    noreorder;                      \
 185                bnezl   rt,9f;                          \
 186                 move   rd,rs;                          \
 187                .set    pop;                            \
 1889:
 189#define MOVZ(rd,rs,rt)                                  \
 190                .set    push;                           \
 191                .set    noreorder;                      \
 192                beqzl   rt,9f;                          \
 193                 move   rd,rs;                          \
 194                .set    pop;                            \
 1959:
 196#endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) */
 197#if (_MIPS_ISA == _MIPS_ISA_MIPS4 ) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \
 198    (_MIPS_ISA == _MIPS_ISA_MIPS32) || (_MIPS_ISA == _MIPS_ISA_MIPS64)
 199#define MOVN(rd,rs,rt)                                  \
 200                movn    rd,rs,rt
 201#define MOVZ(rd,rs,rt)                                  \
 202                movz    rd,rs,rt
 203#endif /* MIPS IV, MIPS V, MIPS32 or MIPS64 */
 204
 205/*
 206 * Stack alignment
 207 */
 208#if (_MIPS_SIM == _MIPS_SIM_ABI32)
 209#define ALSZ    7
 210#define ALMASK  ~7
 211#endif
 212#if (_MIPS_SIM == _MIPS_SIM_ABIN32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 213#define ALSZ    15
 214#define ALMASK  ~15
 215#endif
 216
 217/*
 218 * Macros to handle different pointer/register sizes for 32/64-bit code
 219 */
 220
 221/*
 222 * Size of a register
 223 */
 224#ifdef __mips64
 225#define SZREG   8
 226#else
 227#define SZREG   4
 228#endif
 229
 230/*
 231 * Use the following macros in assemblercode to load/store registers,
 232 * pointers etc.
 233 */
 234#if (_MIPS_SIM == _MIPS_SIM_ABI32)
 235#define REG_S           sw
 236#define REG_L           lw
 237#define REG_SUBU        subu
 238#define REG_ADDU        addu
 239#endif
 240#if (_MIPS_SIM == _MIPS_SIM_ABIN32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 241#define REG_S           sd
 242#define REG_L           ld
 243#define REG_SUBU        dsubu
 244#define REG_ADDU        daddu
 245#endif
 246
 247/*
 248 * How to add/sub/load/store/shift C int variables.
 249 */
 250#if (_MIPS_SZINT == 32)
 251#define INT_ADD         add
 252#define INT_ADDU        addu
 253#define INT_ADDI        addi
 254#define INT_ADDIU       addiu
 255#define INT_SUB         sub
 256#define INT_SUBU        subu
 257#define INT_L           lw
 258#define INT_S           sw
 259#define INT_SLL         sll
 260#define INT_SLLV        sllv
 261#define INT_SRL         srl
 262#define INT_SRLV        srlv
 263#define INT_SRA         sra
 264#define INT_SRAV        srav
 265#endif
 266
 267#if (_MIPS_SZINT == 64)
 268#define INT_ADD         dadd
 269#define INT_ADDU        daddu
 270#define INT_ADDI        daddi
 271#define INT_ADDIU       daddiu
 272#define INT_SUB         dsub
 273#define INT_SUBU        dsubu
 274#define INT_L           ld
 275#define INT_S           sd
 276#define INT_SLL         dsll
 277#define INT_SLLV        dsllv
 278#define INT_SRL         dsrl
 279#define INT_SRLV        dsrlv
 280#define INT_SRA         dsra
 281#define INT_SRAV        dsrav
 282#endif
 283
 284/*
 285 * How to add/sub/load/store/shift C long variables.
 286 */
 287#if (_MIPS_SZLONG == 32)
 288#define LONG_ADD        add
 289#define LONG_ADDU       addu
 290#define LONG_ADDI       addi
 291#define LONG_ADDIU      addiu
 292#define LONG_SUB        sub
 293#define LONG_SUBU       subu
 294#define LONG_L          lw
 295#define LONG_S          sw
 296#define LONG_SLL        sll
 297#define LONG_SLLV       sllv
 298#define LONG_SRL        srl
 299#define LONG_SRLV       srlv
 300#define LONG_SRA        sra
 301#define LONG_SRAV       srav
 302#endif
 303
 304#if (_MIPS_SZLONG == 64)
 305#define LONG_ADD        dadd
 306#define LONG_ADDU       daddu
 307#define LONG_ADDI       daddi
 308#define LONG_ADDIU      daddiu
 309#define LONG_SUB        dsub
 310#define LONG_SUBU       dsubu
 311#define LONG_L          ld
 312#define LONG_S          sd
 313#define LONG_SLL        dsll
 314#define LONG_SLLV       dsllv
 315#define LONG_SRL        dsrl
 316#define LONG_SRLV       dsrlv
 317#define LONG_SRA        dsra
 318#define LONG_SRAV       dsrav
 319#endif
 320
 321/*
 322 * How to add/sub/load/store/shift pointers.
 323 */
 324#if (_MIPS_SZPTR == 32)
 325#define PTR_ADD         add
 326#define PTR_ADDU        addu
 327#define PTR_ADDI        addi
 328#define PTR_ADDIU       addiu
 329#define PTR_SUB         sub
 330#define PTR_SUBU        subu
 331#define PTR_L           lw
 332#define PTR_S           sw
 333#define PTR_LA          la
 334#define PTR_SLL         sll
 335#define PTR_SLLV        sllv
 336#define PTR_SRL         srl
 337#define PTR_SRLV        srlv
 338#define PTR_SRA         sra
 339#define PTR_SRAV        srav
 340
 341#define PTR_SCALESHIFT  2
 342
 343#define PTR             .word
 344#define PTRSIZE         4
 345#define PTRLOG          2
 346#endif
 347
 348#if (_MIPS_SZPTR == 64)
 349#define PTR_ADD         dadd
 350#define PTR_ADDU        daddu
 351#define PTR_ADDI        daddi
 352#define PTR_ADDIU       daddiu
 353#define PTR_SUB         dsub
 354#define PTR_SUBU        dsubu
 355#define PTR_L           ld
 356#define PTR_S           sd
 357#define PTR_LA          dla
 358#define PTR_SLL         dsll
 359#define PTR_SLLV        dsllv
 360#define PTR_SRL         dsrl
 361#define PTR_SRLV        dsrlv
 362#define PTR_SRA         dsra
 363#define PTR_SRAV        dsrav
 364
 365#define PTR_SCALESHIFT  3
 366
 367#define PTR             .dword
 368#define PTRSIZE         8
 369#define PTRLOG          3
 370#endif
 371
 372/*
 373 * Some cp0 registers were extended to 64bit for MIPS III.
 374 */
 375#if (_MIPS_SIM == _MIPS_SIM_ABI32)
 376#define MFC0            mfc0
 377#define MTC0            mtc0
 378#endif
 379#if (_MIPS_SIM == _MIPS_SIM_ABIN32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 380#define MFC0            dmfc0
 381#define MTC0            dmtc0
 382#endif
 383
 384#define SSNOP           sll zero,zero,1
 385
 386#endif /* __ASM_ASM_H */
 387