/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_JUMP_LABEL_H
#define _ASM_POWERPC_JUMP_LABEL_H

/*
 * Copyright 2010 Michael Ellerman, IBM Corp.
 */

#ifndef __ASSEMBLER__
#include <linux/types.h>

#include <asm/feature-fixups.h>
#include <asm/asm-const.h>

#define JUMP_ENTRY_TYPE         stringify_in_c(FTR_ENTRY_LONG)
#define JUMP_LABEL_NOP_SIZE     4

static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
{
        asm goto("1:\n\t"
                 "nop # arch_static_branch\n\t"
                 ".pushsection __jump_table,  \"aw\"\n\t"
                 ".long 1b - ., %l[l_yes] - .\n\t"
                 JUMP_ENTRY_TYPE "%c0 - .\n\t"
                 ".popsection \n\t"
                 : :  "i" (&((char *)key)[branch]) : : l_yes);

        return false;
l_yes:
        return true;
}

static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
{
        asm goto("1:\n\t"
                 "b %l[l_yes] # arch_static_branch_jump\n\t"
                 ".pushsection __jump_table,  \"aw\"\n\t"
                 ".long 1b - ., %l[l_yes] - .\n\t"
                 JUMP_ENTRY_TYPE "%c0 - .\n\t"
                 ".popsection \n\t"
                 : :  "i" (&((char *)key)[branch]) : : l_yes);

        return false;
l_yes:
        return true;
}

#else
#define ARCH_STATIC_BRANCH(LABEL, KEY)          \
1098:   nop;                                    \
        .pushsection __jump_table, "aw";        \
        .long 1098b - ., LABEL - .;             \
        FTR_ENTRY_LONG KEY - .;                 \
        .popsection
#endif

#endif /* _ASM_POWERPC_JUMP_LABEL_H */