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