1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_ARM_JUMP_LABEL_H
3 #define _ASM_ARM_JUMP_LABEL_H
4
5 #ifndef __ASSEMBLY__
6
7 #include <linux/types.h>
8 #include <asm/unified.h>
9
10 #define JUMP_LABEL_NOP_SIZE 4
11
12 static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
13 {
14 asm goto("1:\n\t"
15 WASM(nop) "\n\t"
16 ".pushsection __jump_table, \"aw\"\n\t"
17 ".word 1b, %l[l_yes], %c0\n\t"
18 ".popsection\n\t"
19 : : "i" (&((char *)key)[branch]) : : l_yes);
20
21 return false;
22 l_yes:
23 return true;
24 }
25
26 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
27 {
28 asm goto("1:\n\t"
29 WASM(b) " %l[l_yes]\n\t"
30 ".pushsection __jump_table, \"aw\"\n\t"
31 ".word 1b, %l[l_yes], %c0\n\t"
32 ".popsection\n\t"
33 : : "i" (&((char *)key)[branch]) : : l_yes);
34
35 return false;
36 l_yes:
37 return true;
38 }
39
40 typedef u32 jump_label_t;
41
42 struct jump_entry {
43 jump_label_t code;
44 jump_label_t target;
45 jump_label_t key;
46 };
47
48 #endif /* __ASSEMBLY__ */
49 #endif
50
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