Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/csky/include/asm/jump_label.h
26493 views
1
/* SPDX-License-Identifier: GPL-2.0-only */

2


3
#ifndef __ASM_CSKY_JUMP_LABEL_H

4
#define __ASM_CSKY_JUMP_LABEL_H

5


6
#ifndef __ASSEMBLY__

7


8
#include <linux/types.h>

9


10
#define JUMP_LABEL_NOP_SIZE 4

11


12
static __always_inline bool arch_static_branch(struct static_key *key,

13
					       bool branch)

14
{

15
	asm goto(

16
		"1:	nop32					\n"

17
		"	.pushsection	__jump_table, \"aw\"	\n"

18
		"	.align		2			\n"

19
		"	.long		1b - ., %l[label] - .	\n"

20
		"	.long		%0 - .			\n"

21
		"	.popsection				\n"

22
		:  :  "i"(&((char *)key)[branch]) :  : label);

23


24
	return false;

25
label:

26
	return true;

27
}

28


29
static __always_inline bool arch_static_branch_jump(struct static_key *key,

30
						    bool branch)

31
{

32
	asm goto(

33
		"1:	bsr32		%l[label]		\n"

34
		"	.pushsection	__jump_table, \"aw\"	\n"

35
		"	.align		2			\n"

36
		"	.long		1b - ., %l[label] - .	\n"

37
		"	.long		%0 - .			\n"

38
		"	.popsection				\n"

39
		:  :  "i"(&((char *)key)[branch]) :  : label);

40


41
	return false;

42
label:

43
	return true;

44
}

45


46
enum jump_label_type;

47
void arch_jump_label_transform_static(struct jump_entry *entry,

48
				      enum jump_label_type type);

49
#define arch_jump_label_transform_static arch_jump_label_transform_static

50


51
#endif  /* __ASSEMBLY__ */

52
#endif	/* __ASM_CSKY_JUMP_LABEL_H */

53


54