jump_label.h

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