LXR uboot/arch/mips/include/asm/regdef.h

   1/*
   2 * Copyright (C) 1985 MIPS Computer Systems, Inc.
   3 * Copyright (C) 1994, 95, 99, 2003 by Ralf Baechle
   4 * Copyright (C) 1990 - 1992, 1999 Silicon Graphics, Inc.
   5 * Copyright (C) 2011 Wind River Systems,
   6 *   written by Ralf Baechle <ralf@linux-mips.org>
   7 *
   8 * SPDX-License-Identifier:     GPL-2.0
   9 */
  10#ifndef _ASM_REGDEF_H
  11#define _ASM_REGDEF_H
  12
  13#include <asm/sgidefs.h>
  14
  15#if _MIPS_SIM == _MIPS_SIM_ABI32
  16
  17/*
  18 * Symbolic register names for 32 bit ABI
  19 */
  20#define zero    $0      /* wired zero */
  21#define AT      $1      /* assembler temp  - uppercase because of ".set at" */
  22#define v0      $2      /* return value */
  23#define v1      $3
  24#define a0      $4      /* argument registers */
  25#define a1      $5
  26#define a2      $6
  27#define a3      $7
  28#define t0      $8      /* caller saved */
  29#define t1      $9
  30#define t2      $10
  31#define t3      $11
  32#define t4      $12
  33#define ta0     $12
  34#define t5      $13
  35#define ta1     $13
  36#define t6      $14
  37#define ta2     $14
  38#define t7      $15
  39#define ta3     $15
  40#define s0      $16     /* callee saved */
  41#define s1      $17
  42#define s2      $18
  43#define s3      $19
  44#define s4      $20
  45#define s5      $21
  46#define s6      $22
  47#define s7      $23
  48#define t8      $24     /* caller saved */
  49#define t9      $25
  50#define jp      $25     /* PIC jump register */
  51#define k0      $26     /* kernel scratch */
  52#define k1      $27
  53#define gp      $28     /* global pointer */
  54#define sp      $29     /* stack pointer */
  55#define fp      $30     /* frame pointer */
  56#define s8      $30     /* same like fp! */
  57#define ra      $31     /* return address */
  58
  59#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
  60
  61#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
  62
  63#define zero    $0      /* wired zero */
  64#define AT      $at     /* assembler temp - uppercase because of ".set at" */
  65#define v0      $2      /* return value - caller saved */
  66#define v1      $3
  67#define a0      $4      /* argument registers */
  68#define a1      $5
  69#define a2      $6
  70#define a3      $7
  71#define a4      $8      /* arg reg 64 bit; caller saved in 32 bit */
  72#define ta0     $8
  73#define a5      $9
  74#define ta1     $9
  75#define a6      $10
  76#define ta2     $10
  77#define a7      $11
  78#define ta3     $11
  79#define t0      $12     /* caller saved */
  80#define t1      $13
  81#define t2      $14
  82#define t3      $15
  83#define s0      $16     /* callee saved */
  84#define s1      $17
  85#define s2      $18
  86#define s3      $19
  87#define s4      $20
  88#define s5      $21
  89#define s6      $22
  90#define s7      $23
  91#define t8      $24     /* caller saved */
  92#define t9      $25     /* callee address for PIC/temp */
  93#define jp      $25     /* PIC jump register */
  94#define k0      $26     /* kernel temporary */
  95#define k1      $27
  96#define gp      $28     /* global pointer - caller saved for PIC */
  97#define sp      $29     /* stack pointer */
  98#define fp      $30     /* frame pointer */
  99#define s8      $30     /* callee saved */
 100#define ra      $31     /* return address */
 101
 102#endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
 103
 104#endif /* _ASM_REGDEF_H */
 105