summaryrefslogtreecommitdiff
path: root/tools/virtio/linux/kernel.h
blob: 8b877167933d13df8dca2519c429cba395843cd6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef KERNEL_H
#define KERNEL_H
#include <stdbool.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdarg.h>

#include <linux/compiler.h>
#include <linux/log2.h>
#include <linux/types.h>
#include <linux/overflow.h>
#include <linux/list.h>
#include <linux/printk.h>
#include <linux/bug.h>
#include <errno.h>
#include <unistd.h>
#include <asm/barrier.h>

#define CONFIG_SMP

#define PAGE_SIZE getpagesize()
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK)

/* generic data direction definitions */
#define READ                    0
#define WRITE                   1

typedef unsigned long long dma_addr_t;
typedef size_t __kernel_size_t;
typedef unsigned int __wsum;

struct page {
	unsigned long long dummy;
};

/* Physical == Virtual */
#define virt_to_phys(p) ((unsigned long)p)
#define phys_to_virt(a) ((void *)(unsigned long)(a))
/* Page address: Virtual / 4K */
#define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
#define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))

#define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)

#define __printf(a,b) __attribute__((format(printf,a,b)))

#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
static inline void *kmalloc(size_t s, gfp_t gfp)
{
	if (__kmalloc_fake)
		return __kmalloc_fake;
	return malloc(s);
}
static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp)
{
	return kmalloc(n * s, gfp);
}

static inline void *kzalloc(size_t s, gfp_t gfp)
{
	void *p = kmalloc(s, gfp);

	memset(p, 0, s);
	return p;
}

static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
{
	return kmalloc(s, gfp);
}

static inline void kfree(void *p)
{
	if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
		return;
	free(p);
}

static inline void free_pages_exact(void *p, size_t s)
{
	kfree(p);
}

static inline void *krealloc(void *p, size_t s, gfp_t gfp)
{
	return realloc(p, s);
}


static inline unsigned long __get_free_page(gfp_t gfp)
{
	void *p;

	posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
	return (unsigned long)p;
}

static inline void free_page(unsigned long addr)
{
	free((void *)addr);
}

#define container_of(ptr, type, member) ({			\
	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
	(type *)( (char *)__mptr - offsetof(type,member) );})

# ifndef likely
#  define likely(x)	(__builtin_expect(!!(x), 1))
# endif
# ifndef unlikely
#  define unlikely(x)	(__builtin_expect(!!(x), 0))
# endif

static inline void *krealloc_array(void *p, size_t new_n, size_t new_size, gfp_t gfp)
{
	size_t bytes;

	if (unlikely(check_mul_overflow(new_n, new_size, &bytes)))
		return NULL;

	return krealloc(p, bytes, gfp);
}

#define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
#ifdef DEBUG
#define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
#else
#define pr_debug(format, ...) do {} while (0)
#endif
#define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
#define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
#define dev_warn_once(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)

#define min(x, y) ({				\
	typeof(x) _min1 = (x);			\
	typeof(y) _min2 = (y);			\
	(void) (&_min1 == &_min2);		\
	_min1 < _min2 ? _min1 : _min2; })

#endif /* KERNEL_H */