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