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#include <linux/types.h>
12
13#ifdef __KERNEL__
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
23static __always_inline bool arch_static_branch(struct jump_label_key *key)
 
 
 
 
 
 
24{
25	asm goto("1:\tnop\n\t"
26		"nop\n\t"
27		".pushsection __jump_table,  \"aw\"\n\t"
28		WORD_INSN " 1b, %l[l_yes], %0\n\t"
29		".popsection\n\t"
30		: :  "i" (key) : : l_yes);
 
31	return false;
32l_yes:
33	return true;
34}
35
36#endif /* __KERNEL__ */
 
 
 
 
 
 
 
 
 
 
 
 
37
38#ifdef CONFIG_64BIT
39typedef u64 jump_label_t;
40#else
41typedef u32 jump_label_t;
42#endif
43
44struct jump_entry {
45	jump_label_t code;
46	jump_label_t target;
47	jump_label_t key;
48};
49
 
50#endif /* _ASM_MIPS_JUMP_LABEL_H */

 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, bool branch)
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" (&((char *)key)[branch]) : : l_yes);
37
38	return false;
39l_yes:
40	return true;
41}
42
43static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
44{
45	asm_volatile_goto("1:\tj %l[l_yes]\n\t"
46		"nop\n\t"
47		".pushsection __jump_table,  \"aw\"\n\t"
48		WORD_INSN " 1b, %l[l_yes], %0\n\t"
49		".popsection\n\t"
50		: :  "i" (&((char *)key)[branch]) : : l_yes);
51
52	return false;
53l_yes:
54	return true;
55}
56
57#ifdef CONFIG_64BIT
58typedef u64 jump_label_t;
59#else
60typedef u32 jump_label_t;
61#endif
62
63struct jump_entry {
64	jump_label_t code;
65	jump_label_t target;
66	jump_label_t key;
67};
68
69#endif  /* __ASSEMBLY__ */
70#endif /* _ASM_MIPS_JUMP_LABEL_H */