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/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
  26typedef unsigned long long phys_addr_t;
  27typedef unsigned long long dma_addr_t;
  28typedef size_t __kernel_size_t;
  29typedef unsigned int __wsum;
  30
  31struct 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
  48extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
  49static inline void *kmalloc(size_t s, gfp_t gfp)
  50{
  51        if (__kmalloc_fake)
  52                return __kmalloc_fake;
  53        return malloc(s);
  54}
  55static 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
  63static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
  64{
  65        return kmalloc(s, gfp);
  66}
  67
  68static inline void kfree(void *p)
  69{
  70        if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
  71                return;
  72        free(p);
  73}
  74
  75static inline void free_pages_exact(void *p, size_t s)
  76{
  77        kfree(p);
  78}
  79
  80static inline void *krealloc(void *p, size_t s, gfp_t gfp)
  81{
  82        return realloc(p, s);
  83}
  84
  85
  86static 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
  94static 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 */
 136