195 lines
5.6 KiB
C
195 lines
5.6 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __KERNCOMPAT_H__
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#define __KERNCOMPAT_H__
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#ifndef __SANE_USERSPACE_TYPES__
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/* For PPC64 to get LL64 types */
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#define __SANE_USERSPACE_TYPES__
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <endian.h>
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#include <byteswap.h>
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#include <stddef.h>
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/*
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* Libc compatibility.
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*/
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#if !defined(__GLIBC__) || defined(__UCLIBC__)
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/* Musl does not define __always_inline */
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#ifndef __always_inline
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#define __always_inline __inline __attribute__ ((__always_inline__))
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#endif
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#endif
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#ifdef __CHECKER__
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#define __force __attribute__((force))
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#define __bitwise__ __attribute__((bitwise))
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#define __bitwise __bitwise__
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#else
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#define __force
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#ifndef __bitwise__
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#define __bitwise__
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#endif
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#ifndef __bitwise
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#define __bitwise
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#endif
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#endif
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#ifndef __CHECKER__
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/*
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* Since we're using primitive definitions from kernel-space, we need to
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* define __KERNEL__ so that system header files know which definitions
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* to use.
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*/
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#define __KERNEL__
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#include <asm/types.h>
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typedef __u32 u32;
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typedef __u64 u64;
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typedef __u16 u16;
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typedef __u8 u8;
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typedef __s64 s64;
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typedef __s32 s32;
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/*
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* Continuing to define __KERNEL__ breaks others parts of the code, so
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* we can just undefine it now that we have the correct headers...
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*/
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#undef __KERNEL__
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#else
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typedef unsigned int u32;
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typedef unsigned int __u32;
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typedef unsigned long long u64;
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef long long s64;
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typedef int s32;
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#endif
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/*
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* error pointer
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*/
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#define MAX_ERRNO 4095
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#define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO)
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static inline void *ERR_PTR(long error)
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{
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return (void *) error;
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}
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static inline long PTR_ERR(const void *ptr)
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{
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return (long) ptr;
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}
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static inline int IS_ERR(const void *ptr)
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{
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return IS_ERR_VALUE((unsigned long)ptr);
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}
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static inline int IS_ERR_OR_NULL(const void *ptr)
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{
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return !ptr || IS_ERR(ptr);
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}
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#define BUG() \
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do { \
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fprintf(stderr, "%s:%u: BUG in %s()\n", __FILE__, __LINE__, __func__); \
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abort(); \
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exit(1); \
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__builtin_unreachable(); \
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} while (0)
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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typedef u16 __bitwise __le16;
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typedef u16 __bitwise __be16;
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typedef u32 __bitwise __le32;
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typedef u32 __bitwise __be32;
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typedef u64 __bitwise __le64;
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typedef u64 __bitwise __be64;
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/* Macros to generate set/get funcs for the struct fields
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* assume there is a lefoo_to_cpu for every type, so lets make a simple
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* one for u8:
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*/
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#define le8_to_cpu(v) (v)
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#define cpu_to_le8(v) (v)
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#define __le8 u8
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define cpu_to_le64(x) ((__force __le64)(u64)(bswap_64(x)))
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#define le64_to_cpu(x) ((__force u64)(__le64)(bswap_64(x)))
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#define cpu_to_le32(x) ((__force __le32)(u32)(bswap_32(x)))
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#define le32_to_cpu(x) ((__force u32)(__le32)(bswap_32(x)))
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#define cpu_to_le16(x) ((__force __le16)(u16)(bswap_16(x)))
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#define le16_to_cpu(x) ((__force u16)(__le16)(bswap_16(x)))
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#else
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#define cpu_to_le64(x) ((__force __le64)(u64)(x))
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#define le64_to_cpu(x) ((__force u64)(__le64)(x))
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#define cpu_to_le32(x) ((__force __le32)(u32)(x))
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#define le32_to_cpu(x) ((__force u32)(__le32)(x))
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#define cpu_to_le16(x) ((__force __le16)(u16)(x))
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#define le16_to_cpu(x) ((__force u16)(__le16)(x))
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#endif
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struct __una_u16 { __le16 x; } __attribute__((__packed__));
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struct __una_u32 { __le32 x; } __attribute__((__packed__));
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struct __una_u64 { __le64 x; } __attribute__((__packed__));
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#define get_unaligned_le8(p) (*((u8 *)(p)))
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#define get_unaligned_8(p) (*((u8 *)(p)))
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#define put_unaligned_le8(val,p) ((*((u8 *)(p))) = (val))
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#define put_unaligned_8(val,p) ((*((u8 *)(p))) = (val))
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#define get_unaligned_le16(p) le16_to_cpu(((const struct __una_u16 *)(p))->x)
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#define get_unaligned_16(p) (((const struct __una_u16 *)(p))->x)
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#define put_unaligned_le16(val,p) (((struct __una_u16 *)(p))->x = cpu_to_le16(val))
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#define put_unaligned_16(val,p) (((struct __una_u16 *)(p))->x = (val))
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#define get_unaligned_le32(p) le32_to_cpu(((const struct __una_u32 *)(p))->x)
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#define get_unaligned_32(p) (((const struct __una_u32 *)(p))->x)
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#define put_unaligned_le32(val,p) (((struct __una_u32 *)(p))->x = cpu_to_le32(val))
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#define put_unaligned_32(val,p) (((struct __una_u32 *)(p))->x = (val))
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#define get_unaligned_le64(p) le64_to_cpu(((const struct __una_u64 *)(p))->x)
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#define get_unaligned_64(p) (((const struct __una_u64 *)(p))->x)
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#define put_unaligned_le64(val,p) (((struct __una_u64 *)(p))->x = cpu_to_le64(val))
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#define put_unaligned_64(val,p) (((struct __una_u64 *)(p))->x = (val))
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/*
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* Note: simplified versions of READ_ONCE and WRITE_ONCE for source
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* compatibility only, not usable for lock-less implementation like in kernel.
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*
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* Changed:
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* - __unqual_scalar_typeof: volatile cast to typeof()
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* - compiletime_assert_rwonce_type: no word size compatibility checks
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* - no const volatile cast
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*/
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#define READ_ONCE(x) (x)
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#define WRITE_ONCE(x, val) \
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do { \
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(x) = (val); \
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} while (0)
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#endif
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