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
10 #define VDSO_PRECISION_MASK ~(0xFF00ULL<<48)
11
12 extern struct vdso_data *vdso_data;
13
14 /*
15 * Update the vDSO data page to keep in sync with kernel timekeeping.
16 */
17 static __always_inline
18 struct vdso_data *__arm64_get_k_vdso_data(void)
19 {
20 return vdso_data;
21 }
22 #define __arch_get_k_vdso_data __arm64_get_k_vdso_data
23
24 static __always_inline
25 void __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk)
26 {
27 vdata[CS_HRES_COARSE].mask = VDSO_PRECISION_MASK;
28 vdata[CS_RAW].mask = VDSO_PRECISION_MASK;
29 }
30 #define __arch_update_vsyscall __arm64_update_vsyscall
31
32 /* The asm-generic header needs to be included after the definitions above */
33 #include <asm-generic/vdso/vsyscall.h>
34
35 #endif /* !__ASSEMBLY__ */
36
37 #endif /* __ASM_VDSO_VSYSCALL_H */
38
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