2024-09-09 08:52:07 +00:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2010 Cavium Networks, Inc.
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*/
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#ifndef _ASM_MIPS_JUMP_LABEL_H
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#define _ASM_MIPS_JUMP_LABEL_H
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#include <linux/types.h>
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#ifdef __KERNEL__
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#define JUMP_LABEL_NOP_SIZE 4
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#ifdef CONFIG_64BIT
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#define WORD_INSN ".dword"
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#else
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#define WORD_INSN ".word"
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#endif
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2024-09-09 08:57:42 +00:00
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#ifdef CONFIG_CPU_MICROMIPS
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#define NOP_INSN "nop32"
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#else
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#define NOP_INSN "nop"
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#endif
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2024-09-09 08:52:07 +00:00
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static __always_inline bool arch_static_branch(struct static_key *key)
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{
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2024-09-09 08:57:42 +00:00
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asm_volatile_goto("1:\t" NOP_INSN "\n\t"
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2024-09-09 08:52:07 +00:00
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"nop\n\t"
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".pushsection __jump_table, \"aw\"\n\t"
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WORD_INSN " 1b, %l[l_yes], %0\n\t"
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".popsection\n\t"
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: : "i" (key) : : l_yes);
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return false;
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l_yes:
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return true;
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}
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#endif /* __KERNEL__ */
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#ifdef CONFIG_64BIT
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typedef u64 jump_label_t;
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#else
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typedef u32 jump_label_t;
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#endif
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struct jump_entry {
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jump_label_t code;
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jump_label_t target;
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jump_label_t key;
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};
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#endif /* _ASM_MIPS_JUMP_LABEL_H */
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