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