1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (c) 2010 Cavium Networks, Inc.
7 */
8#ifndef _ASM_MIPS_JUMP_LABEL_H
9#define _ASM_MIPS_JUMP_LABEL_H
10
11#ifndef __ASSEMBLY__
12
13#include <linux/types.h>
14
15#define JUMP_LABEL_NOP_SIZE 4
16
17#ifdef CONFIG_64BIT
18#define WORD_INSN ".dword"
19#else
20#define WORD_INSN ".word"
21#endif
22
23#ifdef CONFIG_CPU_MICROMIPS
24#define NOP_INSN "nop32"
25#else
26#define NOP_INSN "nop"
27#endif
28
29static __always_inline bool arch_static_branch(struct static_key *key)
30{
31	asm_volatile_goto("1:\t" NOP_INSN "\n\t"
32		"nop\n\t"
33		".pushsection __jump_table,  \"aw\"\n\t"
34		WORD_INSN " 1b, %l[l_yes], %0\n\t"
35		".popsection\n\t"
36		: :  "i" (key) : : l_yes);
37	return false;
38l_yes:
39	return true;
40}
41
42#ifdef CONFIG_64BIT
43typedef u64 jump_label_t;
44#else
45typedef u32 jump_label_t;
46#endif
47
48struct jump_entry {
49	jump_label_t code;
50	jump_label_t target;
51	jump_label_t key;
52};
53
54#endif  /* __ASSEMBLY__ */
55#endif /* _ASM_MIPS_JUMP_LABEL_H */
56