LXR linux/tools/virtio/linux/kernel.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef KERNEL_H
   3#define KERNEL_H
   4#include <stdbool.h>
   5#include <stdlib.h>
   6#include <stddef.h>
   7#include <stdio.h>
   8#include <string.h>
   9#include <assert.h>
  10#include <stdarg.h>
  11
  12#include <linux/compiler.h>
  13#include <linux/types.h>
  14#include <linux/list.h>
  15#include <linux/printk.h>
  16#include <linux/bug.h>
  17#include <errno.h>
  18#include <unistd.h>
  19#include <asm/barrier.h>
  20
  21#define CONFIG_SMP
  22
  23#define PAGE_SIZE getpagesize()
  24#define PAGE_MASK (~(PAGE_SIZE-1))
  25#define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK)
  26
  27/* generic data direction definitions */
  28#define READ                    0
  29#define WRITE                   1
  30
  31typedef unsigned long long phys_addr_t;
  32typedef unsigned long long dma_addr_t;
  33typedef size_t __kernel_size_t;
  34typedef unsigned int __wsum;
  35
  36struct page {
  37        unsigned long long dummy;
  38};
  39
  40/* Physical == Virtual */
  41#define virt_to_phys(p) ((unsigned long)p)
  42#define phys_to_virt(a) ((void *)(unsigned long)(a))
  43/* Page address: Virtual / 4K */
  44#define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
  45#define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))
  46
  47#define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)
  48
  49#define __printf(a,b) __attribute__((format(printf,a,b)))
  50
  51#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  52
  53extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
  54static inline void *kmalloc(size_t s, gfp_t gfp)
  55{
  56        if (__kmalloc_fake)
  57                return __kmalloc_fake;
  58        return malloc(s);
  59}
  60static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp)
  61{
  62        return kmalloc(n * s, gfp);
  63}
  64
  65static inline void *kzalloc(size_t s, gfp_t gfp)
  66{
  67        void *p = kmalloc(s, gfp);
  68
  69        memset(p, 0, s);
  70        return p;
  71}
  72
  73static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
  74{
  75        return kmalloc(s, gfp);
  76}
  77
  78static inline void kfree(void *p)
  79{
  80        if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
  81                return;
  82        free(p);
  83}
  84
  85static inline void free_pages_exact(void *p, size_t s)
  86{
  87        kfree(p);
  88}
  89
  90static inline void *krealloc(void *p, size_t s, gfp_t gfp)
  91{
  92        return realloc(p, s);
  93}
  94
  95
  96static inline unsigned long __get_free_page(gfp_t gfp)
  97{
  98        void *p;
  99
 100        posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
 101        return (unsigned long)p;
 102}
 103
 104static inline void free_page(unsigned long addr)
 105{
 106        free((void *)addr);
 107}
 108
 109#define container_of(ptr, type, member) ({                      \
 110        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
 111        (type *)( (char *)__mptr - offsetof(type,member) );})
 112
 113# ifndef likely
 114#  define likely(x)     (__builtin_expect(!!(x), 1))
 115# endif
 116# ifndef unlikely
 117#  define unlikely(x)   (__builtin_expect(!!(x), 0))
 118# endif
 119
 120#define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 121#ifdef DEBUG
 122#define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 123#else
 124#define pr_debug(format, ...) do {} while (0)
 125#endif
 126#define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 127#define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 128
 129#define WARN_ON_ONCE(cond) (unlikely(cond) ? fprintf (stderr, "WARNING\n") : 0)
 130
 131#define min(x, y) ({                            \
 132        typeof(x) _min1 = (x);                  \
 133        typeof(y) _min2 = (y);                  \
 134        (void) (&_min1 == &_min2);              \
 135        _min1 < _min2 ? _min1 : _min2; })
 136
 137#endif /* KERNEL_H */
 138