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 
25 static inline unsigned int get_op(u32 inst)
26 {
27 	return inst >> 26;
28 }
29 
30 static inline unsigned int get_xop(u32 inst)
31 {
32 	return (inst >> 1) & 0x3ff;
33 }
34 
35 static inline unsigned int get_sprn(u32 inst)
36 {
37 	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
38 }
39 
40 static inline unsigned int get_dcrn(u32 inst)
41 {
42 	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
43 }
44 
45 static inline unsigned int get_rt(u32 inst)
46 {
47 	return (inst >> 21) & 0x1f;
48 }
49 
50 static inline unsigned int get_rs(u32 inst)
51 {
52 	return (inst >> 21) & 0x1f;
53 }
54 
55 static inline unsigned int get_ra(u32 inst)
56 {
57 	return (inst >> 16) & 0x1f;
58 }
59 
60 static inline unsigned int get_rb(u32 inst)
61 {
62 	return (inst >> 11) & 0x1f;
63 }
64 
65 static inline unsigned int get_rc(u32 inst)
66 {
67 	return inst & 0x1;
68 }
69 
70 static inline unsigned int get_ws(u32 inst)
71 {
72 	return (inst >> 11) & 0x1f;
73 }
74 
75 static inline unsigned int get_d(u32 inst)
76 {
77 	return inst & 0xffff;
78 }
79 
80 static inline unsigned int get_oc(u32 inst)
81 {
82 	return (inst >> 11) & 0x7fff;
83 }
84 
85 #define IS_XFORM(inst)	(get_op(inst)  == 31)
86 #define IS_DSFORM(inst)	(get_op(inst) >= 56)
87 
88 /*
89  * Create a DSISR value from the instruction
90  */
91 static inline unsigned make_dsisr(unsigned instr)
92 {
93 	unsigned dsisr;
94 
95 
96 	/* bits  6:15 --> 22:31 */
97 	dsisr = (instr & 0x03ff0000) >> 16;
98 
99 	if (IS_XFORM(instr)) {
100 		/* bits 29:30 --> 15:16 */
101 		dsisr |= (instr & 0x00000006) << 14;
102 		/* bit     25 -->    17 */
103 		dsisr |= (instr & 0x00000040) << 8;
104 		/* bits 21:24 --> 18:21 */
105 		dsisr |= (instr & 0x00000780) << 3;
106 	} else {
107 		/* bit      5 -->    17 */
108 		dsisr |= (instr & 0x04000000) >> 12;
109 		/* bits  1: 4 --> 18:21 */
110 		dsisr |= (instr & 0x78000000) >> 17;
111 		/* bits 30:31 --> 12:13 */
112 		if (IS_DSFORM(instr))
113 			dsisr |= (instr & 0x00000003) << 18;
114 	}
115 
116 	return dsisr;
117 }
118 #endif /* __ASM_PPC_DISASSEMBLE_H__ */
119