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#define arch_jump_label_transform_static arch_jump_label_transform
12
13#ifndef __ASSEMBLY__
14
15#include <linux/types.h>
16#include <asm/isa-rev.h>
17
18struct module;
19extern void jump_label_apply_nops(struct module *mod);
20
21#define JUMP_LABEL_NOP_SIZE 4
22
23#ifdef CONFIG_64BIT
24#define WORD_INSN ".dword"
25#else
26#define WORD_INSN ".word"
27#endif
28
29#ifdef CONFIG_CPU_MICROMIPS
30# define B_INSN "b32"
31# define J_INSN "j32"
32#elif MIPS_ISA_REV >= 6
33# define B_INSN "bc"
34# define J_INSN "bc"
35#else
36# define B_INSN "b"
37# define J_INSN "j"
38#endif
39
40static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
41{
42	asm goto("1:\t" B_INSN " 2f\n\t"
43		"2:\t.insn\n\t"
44		".pushsection __jump_table,  \"aw\"\n\t"
45		WORD_INSN " 1b, %l[l_yes], %0\n\t"
46		".popsection\n\t"
47		: :  "i" (&((char *)key)[branch]) : : l_yes);
48
49	return false;
50l_yes:
51	return true;
52}
53
54static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
55{
56	asm goto("1:\t" J_INSN " %l[l_yes]\n\t"
 
57		".pushsection __jump_table,  \"aw\"\n\t"
58		WORD_INSN " 1b, %l[l_yes], %0\n\t"
59		".popsection\n\t"
60		: :  "i" (&((char *)key)[branch]) : : l_yes);
61
62	return false;
63l_yes:
64	return true;
65}
66
67#ifdef CONFIG_64BIT
68typedef u64 jump_label_t;
69#else
70typedef u32 jump_label_t;
71#endif
72
73struct jump_entry {
74	jump_label_t code;
75	jump_label_t target;
76	jump_label_t key;
77};
78
79#endif  /* __ASSEMBLY__ */
80#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 */