/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_ALTERNATIVE_H
#define __ASM_ALTERNATIVE_H

#include <asm/alternative-macros.h>

#ifndef __ASSEMBLER__

#include <linux/init.h>
#include <linux/types.h>
#include <linux/stddef.h>

struct alt_instr {
        s32 orig_offset;        /* offset to original instruction */
        s32 alt_offset;         /* offset to replacement instruction */
        u16 cpucap;             /* cpucap bit set for replacement */
        u8  orig_len;           /* size of original instruction(s) */
        u8  alt_len;            /* size of new instruction(s), <= orig_len */
};

typedef void (*alternative_cb_t)(struct alt_instr *alt,
                                 __le32 *origptr, __le32 *updptr, int nr_inst);

void __init apply_boot_alternatives(void);
void __init apply_alternatives_all(void);
bool alternative_is_applied(u16 cpucap);

#ifdef CONFIG_MODULES
int apply_alternatives_module(void *start, size_t length);
#else
static inline int apply_alternatives_module(void *start, size_t length)
{
        return 0;
}
#endif

void alt_cb_patch_nops(struct alt_instr *alt, __le32 *origptr,
                       __le32 *updptr, int nr_inst);

#endif /* __ASSEMBLER__ */
#endif /* __ASM_ALTERNATIVE_H */