blob: 94eb529dcb77623caf637387e694d8e5ddc049a8 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
David S. Millerdff9d3c2010-09-17 11:09:25 -04002#ifndef _ASM_SPARC_JUMP_LABEL_H
3#define _ASM_SPARC_JUMP_LABEL_H
4
Anton Blanchard55dd0df2015-04-09 13:51:30 +10005#ifndef __ASSEMBLY__
David S. Millerdff9d3c2010-09-17 11:09:25 -04006
7#include <linux/types.h>
David S. Millerdff9d3c2010-09-17 11:09:25 -04008
9#define JUMP_LABEL_NOP_SIZE 4
10
Peter Zijlstra11276d52015-07-24 15:09:55 +020011static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
Jason Barond430d3d2011-03-16 17:29:47 -040012{
Peter Zijlstra11276d52015-07-24 15:09:55 +020013 asm_volatile_goto("1:\n\t"
14 "nop\n\t"
15 "nop\n\t"
16 ".pushsection __jump_table, \"aw\"\n\t"
17 ".align 4\n\t"
18 ".word 1b, %l[l_yes], %c0\n\t"
19 ".popsection \n\t"
20 : : "i" (&((char *)key)[branch]) : : l_yes);
21
22 return false;
23l_yes:
24 return true;
25}
26
27static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
28{
29 asm_volatile_goto("1:\n\t"
30 "b %l[l_yes]\n\t"
31 "nop\n\t"
32 ".pushsection __jump_table, \"aw\"\n\t"
33 ".align 4\n\t"
34 ".word 1b, %l[l_yes], %c0\n\t"
35 ".popsection \n\t"
36 : : "i" (&((char *)key)[branch]) : : l_yes);
37
Jason Barond430d3d2011-03-16 17:29:47 -040038 return false;
39l_yes:
40 return true;
41}
David S. Millerdff9d3c2010-09-17 11:09:25 -040042
David S. Millerdff9d3c2010-09-17 11:09:25 -040043typedef u32 jump_label_t;
44
45struct jump_entry {
46 jump_label_t code;
47 jump_label_t target;
48 jump_label_t key;
49};
50
Anton Blanchard55dd0df2015-04-09 13:51:30 +100051#endif /* __ASSEMBLY__ */
David S. Millerdff9d3c2010-09-17 11:09:25 -040052#endif