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