tools/virtio/linux/kernel.h

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