arch/mips/include/asm/regdef.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) 1985 MIPS Computer Systems, Inc.
   7  * Copyright (C) 1994, 95, 99, 2003 by Ralf Baechle
   8  * Copyright (C) 1990 - 1992, 1999 Silicon Graphics, Inc.
   9  * Copyright (C) 2011 Wind River Systems,
  10  *   written by Ralf Baechle <ralf@linux-mips.org>
  11  */
  12 #ifndef _ASM_REGDEF_H
  13 #define _ASM_REGDEF_H
  14
  15 #include <asm/sgidefs.h>
  16
  17 #if _MIPS_SIM == _MIPS_SIM_ABI32
  18
  19 /*
  20  * General purpose register numbers for 32 bit ABI
  21  */
  22 #define GPR_ZERO        0       /* wired zero */
  23 #define GPR_AT  1       /* assembler temp */
  24 #define GPR_V0  2       /* return value */
  25 #define GPR_V1  3
  26 #define GPR_A0  4       /* argument registers */
  27 #define GPR_A1  5
  28 #define GPR_A2  6
  29 #define GPR_A3  7
  30 #define GPR_T0  8       /* caller saved */
  31 #define GPR_T1  9
  32 #define GPR_T2  10
  33 #define GPR_T3  11
  34 #define GPR_T4  12
  35 #define GPR_TA0 12
  36 #define GPR_T5  13
  37 #define GPR_TA1 13
  38 #define GPR_T6  14
  39 #define GPR_TA2 14
  40 #define GPR_T7  15
  41 #define GPR_TA3 15
  42 #define GPR_S0  16      /* callee saved */
  43 #define GPR_S1  17
  44 #define GPR_S2  18
  45 #define GPR_S3  19
  46 #define GPR_S4  20
  47 #define GPR_S5  21
  48 #define GPR_S6  22
  49 #define GPR_S7  23
  50 #define GPR_T8  24      /* caller saved */
  51 #define GPR_T9  25
  52 #define GPR_JP  25      /* PIC jump register */
  53 #define GPR_K0  26      /* kernel scratch */
  54 #define GPR_K1  27
  55 #define GPR_GP  28      /* global pointer */
  56 #define GPR_SP  29      /* stack pointer */
  57 #define GPR_FP  30      /* frame pointer */
  58 #define GPR_S8  30      /* same like fp! */
  59 #define GPR_RA  31      /* return address */
  60
  61 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
  62
  63 #if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
  64
  65 #define GPR_ZERO        0       /* wired zero */
  66 #define GPR_AT  1       /* assembler temp */
  67 #define GPR_V0  2       /* return value - caller saved */
  68 #define GPR_V1  3
  69 #define GPR_A0  4       /* argument registers */
  70 #define GPR_A1  5
  71 #define GPR_A2  6
  72 #define GPR_A3  7
  73 #define GPR_A4  8       /* arg reg 64 bit; caller saved in 32 bit */
  74 #define GPR_TA0 8
  75 #define GPR_A5  9
  76 #define GPR_TA1 9
  77 #define GPR_A6  10
  78 #define GPR_TA2 10
  79 #define GPR_A7  11
  80 #define GPR_TA3 11
  81 #define GPR_T0  12      /* caller saved */
  82 #define GPR_T1  13
  83 #define GPR_T2  14
  84 #define GPR_T3  15
  85 #define GPR_S0  16      /* callee saved */
  86 #define GPR_S1  17
  87 #define GPR_S2  18
  88 #define GPR_S3  19
  89 #define GPR_S4  20
  90 #define GPR_S5  21
  91 #define GPR_S6  22
  92 #define GPR_S7  23
  93 #define GPR_T8  24      /* caller saved */
  94 #define GPR_T9  25      /* callee address for PIC/temp */
  95 #define GPR_JP  25      /* PIC jump register */
  96 #define GPR_K0  26      /* kernel temporary */
  97 #define GPR_K1  27
  98 #define GPR_GP  28      /* global pointer - caller saved for PIC */
  99 #define GPR_SP  29      /* stack pointer */
 100 #define GPR_FP  30      /* frame pointer */
 101 #define GPR_S8  30      /* callee saved */
 102 #define GPR_RA  31      /* return address */
 103
 104 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
 105
 106 #ifdef __ASSEMBLY__
 107 #if _MIPS_SIM == _MIPS_SIM_ABI32
 108
 109 /*
 110  * Symbolic register names for 32 bit ABI
 111  */
 112 #define zero    $0      /* wired zero */
 113 #define AT      $1      /* assembler temp  - uppercase because of ".set at" */
 114 #define v0      $2      /* return value */
 115 #define v1      $3
 116 #define a0      $4      /* argument registers */
 117 #define a1      $5
 118 #define a2      $6
 119 #define a3      $7
 120 #define t0      $8      /* caller saved */
 121 #define t1      $9
 122 #define t2      $10
 123 #define t3      $11
 124 #define t4      $12
 125 #define ta0     $12
 126 #define t5      $13
 127 #define ta1     $13
 128 #define t6      $14
 129 #define ta2     $14
 130 #define t7      $15
 131 #define ta3     $15
 132 #define s0      $16     /* callee saved */
 133 #define s1      $17
 134 #define s2      $18
 135 #define s3      $19
 136 #define s4      $20
 137 #define s5      $21
 138 #define s6      $22
 139 #define s7      $23
 140 #define t8      $24     /* caller saved */
 141 #define t9      $25
 142 #define jp      $25     /* PIC jump register */
 143 #define k0      $26     /* kernel scratch */
 144 #define k1      $27
 145 #define gp      $28     /* global pointer */
 146 #define sp      $29     /* stack pointer */
 147 #define fp      $30     /* frame pointer */
 148 #define s8      $30     /* same like fp! */
 149 #define ra      $31     /* return address */
 150
 151 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
 152
 153 #if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
 154
 155 #define zero    $0      /* wired zero */
 156 #define AT      $at     /* assembler temp - uppercase because of ".set at" */
 157 #define v0      $2      /* return value - caller saved */
 158 #define v1      $3
 159 #define a0      $4      /* argument registers */
 160 #define a1      $5
 161 #define a2      $6
 162 #define a3      $7
 163 #define a4      $8      /* arg reg 64 bit; caller saved in 32 bit */
 164 #define ta0     $8
 165 #define a5      $9
 166 #define ta1     $9
 167 #define a6      $10
 168 #define ta2     $10
 169 #define a7      $11
 170 #define ta3     $11
 171 #define t0      $12     /* caller saved */
 172 #define t1      $13
 173 #define t2      $14
 174 #define t3      $15
 175 #define s0      $16     /* callee saved */
 176 #define s1      $17
 177 #define s2      $18
 178 #define s3      $19
 179 #define s4      $20
 180 #define s5      $21
 181 #define s6      $22
 182 #define s7      $23
 183 #define t8      $24     /* caller saved */
 184 #define t9      $25     /* callee address for PIC/temp */
 185 #define jp      $25     /* PIC jump register */
 186 #define k0      $26     /* kernel temporary */
 187 #define k1      $27
 188 #define gp      $28     /* global pointer - caller saved for PIC */
 189 #define sp      $29     /* stack pointer */
 190 #define fp      $30     /* frame pointer */
 191 #define s8      $30     /* callee saved */
 192 #define ra      $31     /* return address */
 193
 194 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
 195 #endif /* __ASSEMBLY__ */
 196
 197 #endif /* _ASM_REGDEF_H */