1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_VDSO_VSYSCALL_H
3 #define __ASM_VDSO_VSYSCALL_H
4
5 #ifndef __ASSEMBLY__
6
7 #include <linux/timekeeper_internal.h>
8 #include <vdso/datapage.h>
9 #include <asm/cacheflush.h>
10
11 extern struct vdso_data *vdso_data;
12 extern bool cntvct_ok;
13
14 /*
15 * Update the vDSO data page to keep in sync with kernel timekeeping.
16 */
17 static __always_inline
18 struct vdso_data *__arm_get_k_vdso_data(void)
19 {
20 return vdso_data;
21 }
22 #define __arch_get_k_vdso_data __arm_get_k_vdso_data
23
24 static __always_inline
25 void __arm_sync_vdso_data(struct vdso_data *vdata)
26 {
27 flush_dcache_page(virt_to_page(vdata));
28 }
29 #define __arch_sync_vdso_data __arm_sync_vdso_data
30
31 /* The asm-generic header needs to be included after the definitions above */
32 #include <asm-generic/vdso/vsyscall.h>
33
34 #endif /* !__ASSEMBLY__ */
35
36 #endif /* __ASM_VDSO_VSYSCALL_H */
37
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