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159 lines
3.6 KiB
159 lines
3.6 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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#ifdef CONFIG_PPC64 |
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#define ___get_user_instr(gu_op, dest, ptr) \ |
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({ \ |
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long __gui_ret; \ |
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u32 __user *__gui_ptr = (u32 __user *)ptr; \ |
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struct ppc_inst __gui_inst; \ |
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unsigned int __prefix, __suffix; \ |
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\ |
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__chk_user_ptr(ptr); \ |
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__gui_ret = gu_op(__prefix, __gui_ptr); \ |
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if (__gui_ret == 0) { \ |
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if ((__prefix >> 26) == OP_PREFIX) { \ |
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__gui_ret = gu_op(__suffix, __gui_ptr + 1); \ |
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__gui_inst = ppc_inst_prefix(__prefix, __suffix); \ |
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} else { \ |
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__gui_inst = ppc_inst(__prefix); \ |
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} \ |
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if (__gui_ret == 0) \ |
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(dest) = __gui_inst; \ |
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} \ |
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__gui_ret; \ |
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}) |
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#else /* !CONFIG_PPC64 */ |
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#define ___get_user_instr(gu_op, dest, ptr) \ |
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({ \ |
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__chk_user_ptr(ptr); \ |
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gu_op((dest).val, (u32 __user *)(ptr)); \ |
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}) |
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#endif /* CONFIG_PPC64 */ |
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#define get_user_instr(x, ptr) ___get_user_instr(get_user, x, ptr) |
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#define __get_user_instr(x, ptr) ___get_user_instr(__get_user, x, ptr) |
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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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#define ppc_inst(x) ((struct ppc_inst){ .val = (x) }) |
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#ifdef CONFIG_PPC64 |
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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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#else |
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#define ppc_inst_prefix(x, y) ppc_inst(x) |
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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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#endif /* CONFIG_PPC64 */ |
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static inline struct ppc_inst ppc_inst_read(const u32 *ptr) |
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{ |
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if (IS_ENABLED(CONFIG_PPC64) && (*ptr >> 26) == OP_PREFIX) |
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return ppc_inst_prefix(*ptr, *(ptr + 1)); |
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else |
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return ppc_inst(*ptr); |
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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 IS_ENABLED(CONFIG_PPC64) && ppc_inst_primary_opcode(x) == OP_PREFIX; |
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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)), swab32(ppc_inst_suffix(x))); |
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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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if (ppc_inst_val(x) != ppc_inst_val(y)) |
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return false; |
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if (!ppc_inst_prefixed(x)) |
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return true; |
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return ppc_inst_suffix(x) == ppc_inst_suffix(y); |
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} |
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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 u32 *ppc_inst_next(u32 *location, u32 *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 (void *)location + ppc_inst_len(tmp); |
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} |
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static inline unsigned long ppc_inst_as_ulong(struct ppc_inst x) |
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{ |
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if (IS_ENABLED(CONFIG_PPC32)) |
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return ppc_inst_val(x); |
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else if (IS_ENABLED(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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} |
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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 copy_inst_from_kernel_nofault(struct ppc_inst *inst, u32 *src); |
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#endif /* _ASM_POWERPC_INST_H */
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