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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _ASM_POWERPC_INST_H
3#define _ASM_POWERPC_INST_H
4
5#include <asm/ppc-opcode.h>
6
7#ifdef CONFIG_PPC64
8
9#define ___get_user_instr(gu_op, dest, ptr) \
10({ \
11 long __gui_ret = 0; \
12 unsigned long __gui_ptr = (unsigned long)ptr; \
13 struct ppc_inst __gui_inst; \
14 unsigned int __prefix, __suffix; \
15 __gui_ret = gu_op(__prefix, (unsigned int __user *)__gui_ptr); \
16 if (__gui_ret == 0) { \
17 if ((__prefix >> 26) == OP_PREFIX) { \
18 __gui_ret = gu_op(__suffix, \
19 (unsigned int __user *)__gui_ptr + 1); \
20 __gui_inst = ppc_inst_prefix(__prefix, \
21 __suffix); \
22 } else { \
23 __gui_inst = ppc_inst(__prefix); \
24 } \
25 if (__gui_ret == 0) \
26 (dest) = __gui_inst; \
27 } \
28 __gui_ret; \
29})
30#else /* !CONFIG_PPC64 */
31#define ___get_user_instr(gu_op, dest, ptr) \
32 gu_op((dest).val, (u32 __user *)(ptr))
33#endif /* CONFIG_PPC64 */
34
35#define get_user_instr(x, ptr) \
36 ___get_user_instr(get_user, x, ptr)
37
38#define __get_user_instr(x, ptr) \
39 ___get_user_instr(__get_user, x, ptr)
40
41/*
42 * Instruction data type for POWER
43 */
44
45struct ppc_inst {
46 u32 val;
47#ifdef CONFIG_PPC64
48 u32 suffix;
49#endif
50} __packed;
51
52static inline u32 ppc_inst_val(struct ppc_inst x)
53{
54 return x.val;
55}
56
57static inline int ppc_inst_primary_opcode(struct ppc_inst x)
58{
59 return ppc_inst_val(x) >> 26;
60}
61
62#ifdef CONFIG_PPC64
63#define ppc_inst(x) ((struct ppc_inst){ .val = (x), .suffix = 0xff })
64
65#define ppc_inst_prefix(x, y) ((struct ppc_inst){ .val = (x), .suffix = (y) })
66
67static inline u32 ppc_inst_suffix(struct ppc_inst x)
68{
69 return x.suffix;
70}
71
72static inline bool ppc_inst_prefixed(struct ppc_inst x)
73{
74 return (ppc_inst_primary_opcode(x) == 1) && ppc_inst_suffix(x) != 0xff;
75}
76
77static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
78{
79 return ppc_inst_prefix(swab32(ppc_inst_val(x)),
80 swab32(ppc_inst_suffix(x)));
81}
82
83static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr)
84{
85 u32 val, suffix;
86
87 val = *(u32 *)ptr;
88 if ((val >> 26) == OP_PREFIX) {
89 suffix = *((u32 *)ptr + 1);
90 return ppc_inst_prefix(val, suffix);
91 } else {
92 return ppc_inst(val);
93 }
94}
95
96static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y)
97{
98 return *(u64 *)&x == *(u64 *)&y;
99}
100
101#else
102
103#define ppc_inst(x) ((struct ppc_inst){ .val = x })
104
105#define ppc_inst_prefix(x, y) ppc_inst(x)
106
107static inline bool ppc_inst_prefixed(struct ppc_inst x)
108{
109 return false;
110}
111
112static inline u32 ppc_inst_suffix(struct ppc_inst x)
113{
114 return 0;
115}
116
117static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
118{
119 return ppc_inst(swab32(ppc_inst_val(x)));
120}
121
122static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr)
123{
124 return *ptr;
125}
126
127static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y)
128{
129 return ppc_inst_val(x) == ppc_inst_val(y);
130}
131
132#endif /* CONFIG_PPC64 */
133
134static inline int ppc_inst_len(struct ppc_inst x)
135{
136 return ppc_inst_prefixed(x) ? 8 : 4;
137}
138
139/*
140 * Return the address of the next instruction, if the instruction @value was
141 * located at @location.
142 */
143static inline struct ppc_inst *ppc_inst_next(void *location, struct ppc_inst *value)
144{
145 struct ppc_inst tmp;
146
147 tmp = ppc_inst_read(value);
148
149 return location + ppc_inst_len(tmp);
150}
151
152static inline unsigned long ppc_inst_as_ulong(struct ppc_inst x)
153{
154 if (IS_ENABLED(CONFIG_PPC32))
155 return ppc_inst_val(x);
156 else if (IS_ENABLED(CONFIG_CPU_LITTLE_ENDIAN))
157 return (u64)ppc_inst_suffix(x) << 32 | ppc_inst_val(x);
158 else
159 return (u64)ppc_inst_val(x) << 32 | ppc_inst_suffix(x);
160}
161
162#define PPC_INST_STR_LEN sizeof("00000000 00000000")
163
164static inline char *__ppc_inst_as_str(char str[PPC_INST_STR_LEN], struct ppc_inst x)
165{
166 if (ppc_inst_prefixed(x))
167 sprintf(str, "%08x %08x", ppc_inst_val(x), ppc_inst_suffix(x));
168 else
169 sprintf(str, "%08x", ppc_inst_val(x));
170
171 return str;
172}
173
174#define ppc_inst_as_str(x) \
175({ \
176 char __str[PPC_INST_STR_LEN]; \
177 __ppc_inst_as_str(__str, x); \
178 __str; \
179})
180
181int copy_inst_from_kernel_nofault(struct ppc_inst *inst, struct ppc_inst *src);
182
183#endif /* _ASM_POWERPC_INST_H */