LXR linux/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 * Symbolic register names for 32 bit ABI
  21 */
  22#define zero    $0      /* wired zero */
  23#define AT      $1      /* assembler temp  - uppercase because of ".set at" */
  24#define v0      $2      /* return value */
  25#define v1      $3
  26#define a0      $4      /* argument registers */
  27#define a1      $5
  28#define a2      $6
  29#define a3      $7
  30#define t0      $8      /* caller saved */
  31#define t1      $9
  32#define t2      $10
  33#define t3      $11
  34#define t4      $12
  35#define ta0     $12
  36#define t5      $13
  37#define ta1     $13
  38#define t6      $14
  39#define ta2     $14
  40#define t7      $15
  41#define ta3     $15
  42#define s0      $16     /* callee saved */
  43#define s1      $17
  44#define s2      $18
  45#define s3      $19
  46#define s4      $20
  47#define s5      $21
  48#define s6      $22
  49#define s7      $23
  50#define t8      $24     /* caller saved */
  51#define t9      $25
  52#define jp      $25     /* PIC jump register */
  53#define k0      $26     /* kernel scratch */
  54#define k1      $27
  55#define gp      $28     /* global pointer */
  56#define sp      $29     /* stack pointer */
  57#define fp      $30     /* frame pointer */
  58#define s8      $30     /* same like fp! */
  59#define 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 zero    $0      /* wired zero */
  66#define AT      $at     /* assembler temp - uppercase because of ".set at" */
  67#define v0      $2      /* return value - caller saved */
  68#define v1      $3
  69#define a0      $4      /* argument registers */
  70#define a1      $5
  71#define a2      $6
  72#define a3      $7
  73#define a4      $8      /* arg reg 64 bit; caller saved in 32 bit */
  74#define ta0     $8
  75#define a5      $9
  76#define ta1     $9
  77#define a6      $10
  78#define ta2     $10
  79#define a7      $11
  80#define ta3     $11
  81#define t0      $12     /* caller saved */
  82#define t1      $13
  83#define t2      $14
  84#define t3      $15
  85#define s0      $16     /* callee saved */
  86#define s1      $17
  87#define s2      $18
  88#define s3      $19
  89#define s4      $20
  90#define s5      $21
  91#define s6      $22
  92#define s7      $23
  93#define t8      $24     /* caller saved */
  94#define t9      $25     /* callee address for PIC/temp */
  95#define jp      $25     /* PIC jump register */
  96#define k0      $26     /* kernel temporary */
  97#define k1      $27
  98#define gp      $28     /* global pointer - caller saved for PIC */
  99#define sp      $29     /* stack pointer */
 100#define fp      $30     /* frame pointer */
 101#define s8      $30     /* callee saved */
 102#define ra      $31     /* return address */
 103
 104#endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
 105
 106#endif /* _ASM_REGDEF_H */
 107