LXR linux/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;                      \
  48symbol:         .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;                      \
  61symbol:         .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;                         \
  78symbol:
  79
  80/*
  81 * FEXPORT - export definition of a function symbol
  82 */
  83#define FEXPORT(symbol)                                 \
  84                .globl  symbol;                         \
  85                .type   symbol, @function;              \
  86symbol:         .insn
  87
  88/*
  89 * ABS - export absolute symbol
  90 */
  91#define ABS(symbol,value)                               \
  92                .globl  symbol;                         \
  93symbol          =       value
  94
  95#define TEXT(msg)                                       \
  96                .pushsection .data;                     \
  978:              .asciiz msg;                            \
  98                .popsection;
  99
 100#define ASM_PANIC(msg)                                  \
 101                .set    push;                           \
 102                .set    reorder;                        \
 103                PTR_LA  a0, 8f;                         \
 104                jal     panic;                          \
 1059:              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