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 /* generic data direction definitions */
27 #define READ 0
28 #define WRITE 1
29
30 typedef unsigned long long phys_addr_t;
31 typedef unsigned long long dma_addr_t;
32 typedef size_t __kernel_size_t;
33 typedef unsigned int __wsum;
34
35 struct page {
36 unsigned long long dummy;
37 };
38
39 /* Physical == Virtual */
40 #define virt_to_phys(p) ((unsigned long)p)
41 #define phys_to_virt(a) ((void *)(unsigned long)(a))
42 /* Page address: Virtual / 4K */
43 #define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
44 #define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))
45
46 #define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)
47
48 #define __printf(a,b) __attribute__((format(printf,a,b)))
49
50 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
51
52 extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
kmalloc(size_t s,gfp_t gfp)53 static inline void *kmalloc(size_t s, gfp_t gfp)
54 {
55 if (__kmalloc_fake)
56 return __kmalloc_fake;
57 return malloc(s);
58 }
kzalloc(size_t s,gfp_t gfp)59 static inline void *kzalloc(size_t s, gfp_t gfp)
60 {
61 void *p = kmalloc(s, gfp);
62
63 memset(p, 0, s);
64 return p;
65 }
66
alloc_pages_exact(size_t s,gfp_t gfp)67 static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
68 {
69 return kmalloc(s, gfp);
70 }
71
kfree(void * p)72 static inline void kfree(void *p)
73 {
74 if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
75 return;
76 free(p);
77 }
78
free_pages_exact(void * p,size_t s)79 static inline void free_pages_exact(void *p, size_t s)
80 {
81 kfree(p);
82 }
83
krealloc(void * p,size_t s,gfp_t gfp)84 static inline void *krealloc(void *p, size_t s, gfp_t gfp)
85 {
86 return realloc(p, s);
87 }
88
89
__get_free_page(gfp_t gfp)90 static inline unsigned long __get_free_page(gfp_t gfp)
91 {
92 void *p;
93
94 posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
95 return (unsigned long)p;
96 }
97
free_page(unsigned long addr)98 static inline void free_page(unsigned long addr)
99 {
100 free((void *)addr);
101 }
102
103 #define container_of(ptr, type, member) ({ \
104 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
105 (type *)( (char *)__mptr - offsetof(type,member) );})
106
107 #define uninitialized_var(x) x = x
108
109 # ifndef likely
110 # define likely(x) (__builtin_expect(!!(x), 1))
111 # endif
112 # ifndef unlikely
113 # define unlikely(x) (__builtin_expect(!!(x), 0))
114 # endif
115
116 #define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
117 #ifdef DEBUG
118 #define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
119 #else
120 #define pr_debug(format, ...) do {} while (0)
121 #endif
122 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
123 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
124
125 #define WARN_ON_ONCE(cond) ((cond) && fprintf (stderr, "WARNING\n"))
126
127 #define min(x, y) ({ \
128 typeof(x) _min1 = (x); \
129 typeof(y) _min2 = (y); \
130 (void) (&_min1 == &_min2); \
131 _min1 < _min2 ? _min1 : _min2; })
132
133 /* TODO: empty stubs for now. Broken but enough for virtio_ring.c */
134 #define list_add_tail(a, b) do {} while (0)
135 #define list_del(a) do {} while (0)
136 #define list_for_each_entry(a, b, c) while (0)
137 /* end of stubs */
138
139 #endif /* KERNEL_H */
140