/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __VDSO_DATAPAGE_H
#define __VDSO_DATAPAGE_H

#ifndef __ASSEMBLY__

#include <linux/compiler.h>
#include <uapi/linux/bits.h>
#include <uapi/linux/time.h>
#include <uapi/linux/types.h>
#include <uapi/asm-generic/errno-base.h>

#include <vdso/align.h>
#include <vdso/bits.h>
#include <vdso/cache.h>
#include <vdso/clocksource.h>
#include <vdso/ktime.h>
#include <vdso/limits.h>
#include <vdso/math64.h>
#include <vdso/page.h>
#include <vdso/processor.h>
#include <vdso/time.h>
#include <vdso/time32.h>
#include <vdso/time64.h>

#ifdef CONFIG_ARCH_HAS_VDSO_TIME_DATA
#include <asm/vdso/time_data.h>
#else
struct arch_vdso_time_data {};
#endif

#if defined(CONFIG_ARCH_HAS_VDSO_ARCH_DATA)
#include <asm/vdso/arch_data.h>
#else
struct vdso_arch_data {
	
	char __unused;
};
#endif

#define VDSO_BASES	(CLOCK_TAI + 1)
#define VDSO_BASE_AUX	0
#define VDSO_HRES	(BIT(CLOCK_REALTIME)		| \
			 BIT(CLOCK_MONOTONIC)		| \
			 BIT(CLOCK_BOOTTIME)		| \
			 BIT(CLOCK_TAI))
#define VDSO_COARSE	(BIT(CLOCK_REALTIME_COARSE)	| \
			 BIT(CLOCK_MONOTONIC_COARSE))
#define VDSO_RAW	(BIT(CLOCK_MONOTONIC_RAW))
#define VDSO_AUX	__GENMASK(CLOCK_AUX_LAST, CLOCK_AUX)

#define CS_HRES_COARSE	0
#define CS_RAW		1
#define CS_BASES	(CS_RAW + 1)


struct vdso_timestamp {
	u64	sec;
	u64	nsec;
};


struct vdso_clock {
	u32			seq;

	s32			clock_mode;
	u64			cycle_last;
#ifdef CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT
	u64			max_cycles;
#endif
	u64			mask;
	u32			mult;
	u32			shift;

	union {
		struct vdso_timestamp	basetime[VDSO_BASES];
		struct timens_offset	offset[VDSO_BASES];
	};
};


struct vdso_time_data {
	struct arch_vdso_time_data	arch_data;

	struct vdso_clock		clock_data[CS_BASES];
	struct vdso_clock		aux_clock_data[MAX_AUX_CLOCKS];

	s32				tz_minuteswest;
	s32				tz_dsttime;
	u32				hrtimer_res;
	u32				__unused;
} ____cacheline_aligned;


struct vdso_rng_data {
	u64	generation;
	u8	is_ready;
};


extern struct vdso_time_data vdso_u_time_data __attribute__((visibility("hidden")));
extern struct vdso_rng_data vdso_u_rng_data __attribute__((visibility("hidden")));
extern struct vdso_arch_data vdso_u_arch_data __attribute__((visibility("hidden")));

extern struct vdso_time_data *vdso_k_time_data;
extern struct vdso_rng_data *vdso_k_rng_data;
extern struct vdso_arch_data *vdso_k_arch_data;

#define VDSO_ARCH_DATA_SIZE ALIGN(sizeof(struct vdso_arch_data), PAGE_SIZE)
#define VDSO_ARCH_DATA_PAGES (VDSO_ARCH_DATA_SIZE >> PAGE_SHIFT)

enum vdso_pages {
	VDSO_TIME_PAGE_OFFSET,
	VDSO_TIMENS_PAGE_OFFSET,
	VDSO_RNG_PAGE_OFFSET,
	VDSO_ARCH_PAGES_START,
	VDSO_ARCH_PAGES_END = VDSO_ARCH_PAGES_START + VDSO_ARCH_DATA_PAGES - 1,
	VDSO_NR_PAGES
};


#include <asm/vdso/gettimeofday.h>

#else 

#ifdef CONFIG_VDSO_GETRANDOM
#define __vdso_u_rng_data	PROVIDE(vdso_u_rng_data = vdso_u_data + 2 * PAGE_SIZE);
#else
#define __vdso_u_rng_data
#endif

#ifdef CONFIG_ARCH_HAS_VDSO_ARCH_DATA
#define __vdso_u_arch_data	PROVIDE(vdso_u_arch_data = vdso_u_data + 3 * PAGE_SIZE);
#else
#define __vdso_u_arch_data
#endif

#define VDSO_VVAR_SYMS						\
	PROVIDE(vdso_u_data = . - __VDSO_PAGES * PAGE_SIZE);	\
	PROVIDE(vdso_u_time_data = vdso_u_data);		\
	__vdso_u_rng_data					\
	__vdso_u_arch_data					\


#endif 

#endif 
