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