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150 lines
3.0 KiB
150 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef _ASM_POWERPC_INST_H |
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#define _ASM_POWERPC_INST_H |
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#include <asm/ppc-opcode.h> |
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/* |
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* Instruction data type for POWER |
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*/ |
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struct ppc_inst { |
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u32 val; |
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#ifdef CONFIG_PPC64 |
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u32 suffix; |
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#endif |
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} __packed; |
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static inline u32 ppc_inst_val(struct ppc_inst x) |
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{ |
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return x.val; |
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} |
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static inline int ppc_inst_primary_opcode(struct ppc_inst x) |
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{ |
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return ppc_inst_val(x) >> 26; |
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} |
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#ifdef CONFIG_PPC64 |
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#define ppc_inst(x) ((struct ppc_inst){ .val = (x), .suffix = 0xff }) |
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#define ppc_inst_prefix(x, y) ((struct ppc_inst){ .val = (x), .suffix = (y) }) |
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static inline u32 ppc_inst_suffix(struct ppc_inst x) |
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{ |
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return x.suffix; |
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} |
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static inline bool ppc_inst_prefixed(struct ppc_inst x) |
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{ |
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return (ppc_inst_primary_opcode(x) == 1) && ppc_inst_suffix(x) != 0xff; |
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} |
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static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x) |
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{ |
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return ppc_inst_prefix(swab32(ppc_inst_val(x)), |
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swab32(ppc_inst_suffix(x))); |
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} |
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static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr) |
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{ |
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u32 val, suffix; |
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val = *(u32 *)ptr; |
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if ((val >> 26) == OP_PREFIX) { |
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suffix = *((u32 *)ptr + 1); |
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return ppc_inst_prefix(val, suffix); |
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} else { |
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return ppc_inst(val); |
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} |
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} |
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static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y) |
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{ |
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return *(u64 *)&x == *(u64 *)&y; |
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} |
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#else |
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#define ppc_inst(x) ((struct ppc_inst){ .val = x }) |
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static inline bool ppc_inst_prefixed(struct ppc_inst x) |
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{ |
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return false; |
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} |
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static inline u32 ppc_inst_suffix(struct ppc_inst x) |
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{ |
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return 0; |
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} |
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static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x) |
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{ |
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return ppc_inst(swab32(ppc_inst_val(x))); |
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} |
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static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr) |
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{ |
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return *ptr; |
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} |
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static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y) |
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{ |
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return ppc_inst_val(x) == ppc_inst_val(y); |
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} |
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#endif /* CONFIG_PPC64 */ |
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static inline int ppc_inst_len(struct ppc_inst x) |
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{ |
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return ppc_inst_prefixed(x) ? 8 : 4; |
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} |
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/* |
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* Return the address of the next instruction, if the instruction @value was |
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* located at @location. |
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*/ |
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static inline struct ppc_inst *ppc_inst_next(void *location, struct ppc_inst *value) |
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{ |
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struct ppc_inst tmp; |
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tmp = ppc_inst_read(value); |
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return location + ppc_inst_len(tmp); |
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} |
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static inline u64 ppc_inst_as_u64(struct ppc_inst x) |
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{ |
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#ifdef CONFIG_CPU_LITTLE_ENDIAN |
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return (u64)ppc_inst_suffix(x) << 32 | ppc_inst_val(x); |
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#else |
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return (u64)ppc_inst_val(x) << 32 | ppc_inst_suffix(x); |
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#endif |
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} |
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#define PPC_INST_STR_LEN sizeof("00000000 00000000") |
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static inline char *__ppc_inst_as_str(char str[PPC_INST_STR_LEN], struct ppc_inst x) |
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{ |
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if (ppc_inst_prefixed(x)) |
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sprintf(str, "%08x %08x", ppc_inst_val(x), ppc_inst_suffix(x)); |
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else |
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sprintf(str, "%08x", ppc_inst_val(x)); |
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return str; |
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} |
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#define ppc_inst_as_str(x) \ |
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({ \ |
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char __str[PPC_INST_STR_LEN]; \ |
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__ppc_inst_as_str(__str, x); \ |
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__str; \ |
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}) |
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int probe_user_read_inst(struct ppc_inst *inst, |
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struct ppc_inst __user *nip); |
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int probe_kernel_read_inst(struct ppc_inst *inst, |
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struct ppc_inst *src); |
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#endif /* _ASM_POWERPC_INST_H */
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