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

#include <uapi/linux/types.h>

#ifndef __ASSEMBLY__

#define DECLARE_BITMAP(name,bits) \
        unsigned long name[BITS_TO_LONGS(bits)]

#ifdef __SIZEOF_INT128__
typedef __s128 s128;
typedef __u128 u128;
#endif

typedef u32 __kernel_dev_t;

typedef __kernel_fd_set         fd_set;
typedef __kernel_dev_t          dev_t;
typedef __kernel_ulong_t        ino_t;
typedef __kernel_mode_t         mode_t;
typedef unsigned short          umode_t;
typedef u32                     nlink_t;
typedef __kernel_off_t          off_t;
typedef __kernel_pid_t          pid_t;
typedef __kernel_daddr_t        daddr_t;
typedef __kernel_key_t          key_t;
typedef __kernel_suseconds_t    suseconds_t;
typedef __kernel_timer_t        timer_t;
typedef __kernel_clockid_t      clockid_t;
typedef __kernel_mqd_t          mqd_t;

typedef _Bool                   bool;

typedef __kernel_uid32_t        uid_t;
typedef __kernel_gid32_t        gid_t;
typedef __kernel_uid16_t        uid16_t;
typedef __kernel_gid16_t        gid16_t;

typedef unsigned long           uintptr_t;
typedef long                    intptr_t;

#ifdef CONFIG_HAVE_UID16
/* This is defined by arch/{arch}/include/asm/posix_types.h */
typedef __kernel_old_uid_t      old_uid_t;
typedef __kernel_old_gid_t      old_gid_t;
#endif /* CONFIG_UID16 */

#if defined(__GNUC__)
typedef __kernel_loff_t         loff_t;
typedef __kernel_uoff_t         uoff_t;
#endif

/*
 * The following typedefs are also protected by individual ifdefs for
 * historical reasons:
 */
#ifndef _SIZE_T
#define _SIZE_T
typedef __kernel_size_t         size_t;
#endif

#ifndef _SSIZE_T
#define _SSIZE_T
typedef __kernel_ssize_t        ssize_t;
#endif

#ifndef _PTRDIFF_T
#define _PTRDIFF_T
typedef __kernel_ptrdiff_t      ptrdiff_t;
#endif

#ifndef _CLOCK_T
#define _CLOCK_T
typedef __kernel_clock_t        clock_t;
#endif

#ifndef _CADDR_T
#define _CADDR_T
typedef __kernel_caddr_t        caddr_t;
#endif

/* bsd */
typedef unsigned char           u_char;
typedef unsigned short          u_short;
typedef unsigned int            u_int;
typedef unsigned long           u_long;

/* sysv */
typedef unsigned char           unchar;
typedef unsigned short          ushort;
typedef unsigned int            uint;
typedef unsigned long           ulong;
typedef unsigned long long      ullong;

#ifndef __BIT_TYPES_DEFINED__
#define __BIT_TYPES_DEFINED__

typedef u8                      u_int8_t;
typedef s8                      int8_t;
typedef u16                     u_int16_t;
typedef s16                     int16_t;
typedef u32                     u_int32_t;
typedef s32                     int32_t;

#endif /* !(__BIT_TYPES_DEFINED__) */

typedef u8                      uint8_t;
typedef u16                     uint16_t;
typedef u32                     uint32_t;

#if defined(__GNUC__)
typedef u64                     uint64_t;
typedef u64                     u_int64_t;
typedef s64                     int64_t;
#endif

/* These are the special 64-bit data types that are 8-byte aligned */
#define aligned_u64             __aligned_u64
#define aligned_s64             __aligned_s64
#define aligned_be64            __aligned_be64
#define aligned_le64            __aligned_le64

/* Nanosecond scalar representation for kernel time values */
typedef s64     ktime_t;

/**
 * The type used for indexing onto a disc or disc partition.
 *
 * Linux always considers sectors to be 512 bytes long independently
 * of the devices real block size.
 *
 * blkcnt_t is the type of the inode's block count.
 */
typedef u64 sector_t;
typedef u64 blkcnt_t;

/* generic data direction definitions */
#define READ                    0
#define WRITE                   1

/*
 * The type of an index into the pagecache.
 */
#define pgoff_t unsigned long

/*
 * A dma_addr_t can hold any valid DMA address, i.e., any address returned
 * by the DMA API.
 *
 * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
 * bits wide.  Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
 * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
 * so they don't care about the size of the actual bus addresses.
 */
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
typedef u64 dma_addr_t;
#else
typedef u32 dma_addr_t;
#endif

typedef unsigned int __bitwise gfp_t;
typedef unsigned int __bitwise slab_flags_t;
typedef unsigned int __bitwise fmode_t;

#ifdef CONFIG_PHYS_ADDR_T_64BIT
typedef u64 phys_addr_t;
#else
typedef u32 phys_addr_t;
#endif

struct phys_vec {
        phys_addr_t     paddr;
        size_t          len;
};

typedef phys_addr_t resource_size_t;

/*
 * This type is the placeholder for a hardware interrupt number. It has to be
 * big enough to enclose whatever representation is used by a given platform.
 */
typedef unsigned long irq_hw_number_t;

typedef struct {
        int __aligned(sizeof(int)) counter;
} atomic_t;

#define ATOMIC_INIT(i) { (i) }

#ifdef CONFIG_64BIT
typedef struct {
        s64 counter;
} atomic64_t;
#endif

typedef struct {
        atomic_t refcnt;
} rcuref_t;

#define RCUREF_INIT(i)  { .refcnt = ATOMIC_INIT(i - 1) }

struct list_head {
        struct list_head *next, *prev;
};

struct hlist_head {
        struct hlist_node *first;
};

struct hlist_node {
        struct hlist_node *next, **pprev;
};

struct ustat {
        __kernel_daddr_t        f_tfree;
#ifdef CONFIG_ARCH_32BIT_USTAT_F_TINODE
        unsigned int            f_tinode;
#else
        unsigned long           f_tinode;
#endif
        char                    f_fname[6];
        char                    f_fpack[6];
};

/**
 * struct callback_head - callback structure for use with RCU and task_work
 * @next: next update requests in a list
 * @func: actual update function to call after the grace period.
 *
 * The struct is aligned to size of pointer. On most architectures it happens
 * naturally due ABI requirements, but some architectures (like CRIS) have
 * weird ABI and we need to ask it explicitly.
 *
 * The alignment is required to guarantee that bit 0 of @next will be
 * clear under normal conditions -- as long as we use call_rcu() or
 * call_srcu() to queue the callback.
 *
 * This guarantee is important for few reasons:
 *  - future call_rcu_lazy() will make use of lower bits in the pointer;
 *  - the structure shares storage space in struct page with @compound_head,
 *    which encode PageTail() in bit 0. The guarantee is needed to avoid
 *    false-positive PageTail().
 */
struct callback_head {
        struct callback_head *next;
        void (*func)(struct callback_head *head);
} __attribute__((aligned(sizeof(void *))));
#define rcu_head callback_head

typedef void (*rcu_callback_t)(struct rcu_head *head);
typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);

typedef void (*swap_r_func_t)(void *a, void *b, int size, const void *priv);
typedef void (*swap_func_t)(void *a, void *b, int size);

typedef int (*cmp_r_func_t)(const void *a, const void *b, const void *priv);
typedef int (*cmp_func_t)(const void *a, const void *b);

/*
 * rcuwait provides a way of blocking and waking up a single
 * task in an rcu-safe manner.
 *
 * The only time @task is non-nil is when a user is blocked (or
 * checking if it needs to) on a condition, and reset as soon as we
 * know that the condition has succeeded and are awoken.
 */
struct rcuwait {
        struct task_struct __rcu *task;
};

#endif /*  __ASSEMBLY__ */
#endif /* _LINUX_TYPES_H */