xref: /openbmc/u-boot/arch/mips/include/asm/regdef.h (revision 5794619e)
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  */
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 t5	$13
34 #define t6	$14
35 #define t7	$15
36 #define s0	$16	/* callee saved */
37 #define s1	$17
38 #define s2	$18
39 #define s3	$19
40 #define s4	$20
41 #define s5	$21
42 #define s6	$22
43 #define s7	$23
44 #define t8	$24	/* caller saved */
45 #define t9	$25
46 #define jp	$25	/* PIC jump register */
47 #define k0	$26	/* kernel scratch */
48 #define k1	$27
49 #define gp	$28	/* global pointer */
50 #define sp	$29	/* stack pointer */
51 #define fp	$30	/* frame pointer */
52 #define s8	$30	/* same like fp! */
53 #define ra	$31	/* return address */
54 
55 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
56 
57 #if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
58 
59 #define zero	$0	/* wired zero */
60 #define AT	$at	/* assembler temp - uppercase because of ".set at" */
61 #define v0	$2	/* return value - caller saved */
62 #define v1	$3
63 #define a0	$4	/* argument registers */
64 #define a1	$5
65 #define a2	$6
66 #define a3	$7
67 #define a4	$8	/* arg reg 64 bit; caller saved in 32 bit */
68 #define ta0	$8
69 #define a5	$9
70 #define ta1	$9
71 #define a6	$10
72 #define ta2	$10
73 #define a7	$11
74 #define ta3	$11
75 #define t0	$12	/* caller saved */
76 #define t1	$13
77 #define t2	$14
78 #define t3	$15
79 #define s0	$16	/* callee saved */
80 #define s1	$17
81 #define s2	$18
82 #define s3	$19
83 #define s4	$20
84 #define s5	$21
85 #define s6	$22
86 #define s7	$23
87 #define t8	$24	/* caller saved */
88 #define t9	$25	/* callee address for PIC/temp */
89 #define jp	$25	/* PIC jump register */
90 #define k0	$26	/* kernel temporary */
91 #define k1	$27
92 #define gp	$28	/* global pointer - caller saved for PIC */
93 #define sp	$29	/* stack pointer */
94 #define fp	$30	/* frame pointer */
95 #define s8	$30	/* callee saved */
96 #define ra	$31	/* return address */
97 
98 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
99 
100 #endif /* _ASM_REGDEF_H */
101