xref: /openbmc/linux/arch/arm/include/asm/vdso/vsyscall.h (revision c7a18100)
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
__arm_get_k_vdso_data(void)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
__arm_sync_vdso_data(struct vdso_data * vdata)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