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