162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef __ASM_VDSO_VSYSCALL_H 362306a36Sopenharmony_ci#define __ASM_VDSO_VSYSCALL_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#ifndef __ASSEMBLY__ 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci#include <linux/timekeeper_internal.h> 862306a36Sopenharmony_ci#include <vdso/datapage.h> 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#define VDSO_PRECISION_MASK ~(0xFF00ULL<<48) 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ciextern struct vdso_data *vdso_data; 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci/* 1562306a36Sopenharmony_ci * Update the vDSO data page to keep in sync with kernel timekeeping. 1662306a36Sopenharmony_ci */ 1762306a36Sopenharmony_cistatic __always_inline 1862306a36Sopenharmony_cistruct vdso_data *__arm64_get_k_vdso_data(void) 1962306a36Sopenharmony_ci{ 2062306a36Sopenharmony_ci return vdso_data; 2162306a36Sopenharmony_ci} 2262306a36Sopenharmony_ci#define __arch_get_k_vdso_data __arm64_get_k_vdso_data 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_cistatic __always_inline 2562306a36Sopenharmony_civoid __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk) 2662306a36Sopenharmony_ci{ 2762306a36Sopenharmony_ci vdata[CS_HRES_COARSE].mask = VDSO_PRECISION_MASK; 2862306a36Sopenharmony_ci vdata[CS_RAW].mask = VDSO_PRECISION_MASK; 2962306a36Sopenharmony_ci} 3062306a36Sopenharmony_ci#define __arch_update_vsyscall __arm64_update_vsyscall 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci/* The asm-generic header needs to be included after the definitions above */ 3362306a36Sopenharmony_ci#include <asm-generic/vdso/vsyscall.h> 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci#endif /* !__ASSEMBLY__ */ 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci#endif /* __ASM_VDSO_VSYSCALL_H */ 38