1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2008
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 */
19
20#ifndef __ASM_PPC_DISASSEMBLE_H__
21#define __ASM_PPC_DISASSEMBLE_H__
22
23#include <linux/types.h>
24
25static inline unsigned int get_op(u32 inst)
26{
27	return inst >> 26;
28}
29
30static inline unsigned int get_xop(u32 inst)
31{
32	return (inst >> 1) & 0x3ff;
33}
34
35static inline unsigned int get_sprn(u32 inst)
36{
37	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
38}
39
40static inline unsigned int get_dcrn(u32 inst)
41{
42	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
43}
44
45static inline unsigned int get_tmrn(u32 inst)
46{
47	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
48}
49
50static inline unsigned int get_rt(u32 inst)
51{
52	return (inst >> 21) & 0x1f;
53}
54
55static inline unsigned int get_rs(u32 inst)
56{
57	return (inst >> 21) & 0x1f;
58}
59
60static inline unsigned int get_ra(u32 inst)
61{
62	return (inst >> 16) & 0x1f;
63}
64
65static inline unsigned int get_rb(u32 inst)
66{
67	return (inst >> 11) & 0x1f;
68}
69
70static inline unsigned int get_rc(u32 inst)
71{
72	return inst & 0x1;
73}
74
75static inline unsigned int get_ws(u32 inst)
76{
77	return (inst >> 11) & 0x1f;
78}
79
80static inline unsigned int get_d(u32 inst)
81{
82	return inst & 0xffff;
83}
84
85static inline unsigned int get_oc(u32 inst)
86{
87	return (inst >> 11) & 0x7fff;
88}
89
90#define IS_XFORM(inst)	(get_op(inst)  == 31)
91#define IS_DSFORM(inst)	(get_op(inst) >= 56)
92
93/*
94 * Create a DSISR value from the instruction
95 */
96static inline unsigned make_dsisr(unsigned instr)
97{
98	unsigned dsisr;
99
100
101	/* bits  6:15 --> 22:31 */
102	dsisr = (instr & 0x03ff0000) >> 16;
103
104	if (IS_XFORM(instr)) {
105		/* bits 29:30 --> 15:16 */
106		dsisr |= (instr & 0x00000006) << 14;
107		/* bit     25 -->    17 */
108		dsisr |= (instr & 0x00000040) << 8;
109		/* bits 21:24 --> 18:21 */
110		dsisr |= (instr & 0x00000780) << 3;
111	} else {
112		/* bit      5 -->    17 */
113		dsisr |= (instr & 0x04000000) >> 12;
114		/* bits  1: 4 --> 18:21 */
115		dsisr |= (instr & 0x78000000) >> 17;
116		/* bits 30:31 --> 12:13 */
117		if (IS_DSFORM(instr))
118			dsisr |= (instr & 0x00000003) << 18;
119	}
120
121	return dsisr;
122}
123#endif /* __ASM_PPC_DISASSEMBLE_H__ */
124