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 /* 8 * Instruction data type for POWER 9 */ 10 11 struct ppc_inst { 12 u32 val; 13 #ifdef CONFIG_PPC64 14 u32 suffix; 15 #endif 16 } __packed; 17 18 static inline u32 ppc_inst_val(struct ppc_inst x) 19 { 20 return x.val; 21 } 22 23 static inline int ppc_inst_primary_opcode(struct ppc_inst x) 24 { 25 return ppc_inst_val(x) >> 26; 26 } 27 28 #ifdef CONFIG_PPC64 29 #define ppc_inst(x) ((struct ppc_inst){ .val = (x), .suffix = 0xff }) 30 31 #define ppc_inst_prefix(x, y) ((struct ppc_inst){ .val = (x), .suffix = (y) }) 32 33 static inline u32 ppc_inst_suffix(struct ppc_inst x) 34 { 35 return x.suffix; 36 } 37 38 static inline bool ppc_inst_prefixed(struct ppc_inst x) 39 { 40 return (ppc_inst_primary_opcode(x) == 1) && ppc_inst_suffix(x) != 0xff; 41 } 42 43 static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x) 44 { 45 return ppc_inst_prefix(swab32(ppc_inst_val(x)), 46 swab32(ppc_inst_suffix(x))); 47 } 48 49 static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr) 50 { 51 u32 val, suffix; 52 53 val = *(u32 *)ptr; 54 if ((val >> 26) == OP_PREFIX) { 55 suffix = *((u32 *)ptr + 1); 56 return ppc_inst_prefix(val, suffix); 57 } else { 58 return ppc_inst(val); 59 } 60 } 61 62 static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y) 63 { 64 return *(u64 *)&x == *(u64 *)&y; 65 } 66 67 #else 68 69 #define ppc_inst(x) ((struct ppc_inst){ .val = x }) 70 71 static inline bool ppc_inst_prefixed(struct ppc_inst x) 72 { 73 return false; 74 } 75 76 static inline u32 ppc_inst_suffix(struct ppc_inst x) 77 { 78 return 0; 79 } 80 81 static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x) 82 { 83 return ppc_inst(swab32(ppc_inst_val(x))); 84 } 85 86 static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr) 87 { 88 return *ptr; 89 } 90 91 static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y) 92 { 93 return ppc_inst_val(x) == ppc_inst_val(y); 94 } 95 96 #endif /* CONFIG_PPC64 */ 97 98 static inline int ppc_inst_len(struct ppc_inst x) 99 { 100 return ppc_inst_prefixed(x) ? 8 : 4; 101 } 102 103 /* 104 * Return the address of the next instruction, if the instruction @value was 105 * located at @location. 106 */ 107 static inline struct ppc_inst *ppc_inst_next(void *location, struct ppc_inst *value) 108 { 109 struct ppc_inst tmp; 110 111 tmp = ppc_inst_read(value); 112 113 return location + ppc_inst_len(tmp); 114 } 115 116 static inline u64 ppc_inst_as_u64(struct ppc_inst x) 117 { 118 #ifdef CONFIG_CPU_LITTLE_ENDIAN 119 return (u64)ppc_inst_suffix(x) << 32 | ppc_inst_val(x); 120 #else 121 return (u64)ppc_inst_val(x) << 32 | ppc_inst_suffix(x); 122 #endif 123 } 124 125 #define PPC_INST_STR_LEN sizeof("00000000 00000000") 126 127 static inline char *__ppc_inst_as_str(char str[PPC_INST_STR_LEN], struct ppc_inst x) 128 { 129 if (ppc_inst_prefixed(x)) 130 sprintf(str, "%08x %08x", ppc_inst_val(x), ppc_inst_suffix(x)); 131 else 132 sprintf(str, "%08x", ppc_inst_val(x)); 133 134 return str; 135 } 136 137 #define ppc_inst_as_str(x) \ 138 ({ \ 139 char __str[PPC_INST_STR_LEN]; \ 140 __ppc_inst_as_str(__str, x); \ 141 __str; \ 142 }) 143 144 int probe_user_read_inst(struct ppc_inst *inst, 145 struct ppc_inst __user *nip); 146 147 int probe_kernel_read_inst(struct ppc_inst *inst, 148 struct ppc_inst *src); 149 150 #endif /* _ASM_POWERPC_INST_H */ 151