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#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 static_key *key)
 
 
 
 
 
 
 
 
 
 
 
24{
25	asm_volatile_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 */