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 "../../../include/linux/container_of.h"
14 #include <linux/log2.h>
15 #include <linux/types.h>
16 #include <linux/overflow.h>
17 #include <linux/limits.h>
18 #include <linux/list.h>
19 #include <linux/printk.h>
20 #include <linux/bug.h>
21 #include <errno.h>
22 #include <unistd.h>
23 #include <asm/barrier.h>
24
25 #define CONFIG_SMP
26
27 #define PAGE_SIZE getpagesize()
28 #define PAGE_MASK (~(PAGE_SIZE-1))
29 #define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK)
30
31 /* generic data direction definitions */
32 #define READ 0
33 #define WRITE 1
34
35 typedef unsigned long long dma_addr_t;
36 typedef size_t __kernel_size_t;
37 typedef unsigned int __wsum;
38
39 struct page {
40 unsigned long long dummy;
41 };
42
43 /* Physical == Virtual */
44 #define virt_to_phys(p) ((unsigned long)p)
45 #define phys_to_virt(a) ((void *)(unsigned long)(a))
46 /* Page address: Virtual / 4K */
47 #define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
48 #define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))
49
50 #define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)
51
52 #define __printf(a,b) __attribute__((format(printf,a,b)))
53
54 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
55
56 extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
kmalloc(size_t s,gfp_t gfp)57 static inline void *kmalloc(size_t s, gfp_t gfp)
58 {
59 if (__kmalloc_fake)
60 return __kmalloc_fake;
61 return malloc(s);
62 }
kmalloc_array(unsigned n,size_t s,gfp_t gfp)63 static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp)
64 {
65 return kmalloc(n * s, gfp);
66 }
67
kzalloc(size_t s,gfp_t gfp)68 static inline void *kzalloc(size_t s, gfp_t gfp)
69 {
70 void *p = kmalloc(s, gfp);
71
72 memset(p, 0, s);
73 return p;
74 }
75
alloc_pages_exact(size_t s,gfp_t gfp)76 static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
77 {
78 return kmalloc(s, gfp);
79 }
80
kfree(void * p)81 static inline void kfree(void *p)
82 {
83 if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
84 return;
85 free(p);
86 }
87
free_pages_exact(void * p,size_t s)88 static inline void free_pages_exact(void *p, size_t s)
89 {
90 kfree(p);
91 }
92
krealloc(void * p,size_t s,gfp_t gfp)93 static inline void *krealloc(void *p, size_t s, gfp_t gfp)
94 {
95 return realloc(p, s);
96 }
97
98
__get_free_page(gfp_t gfp)99 static inline unsigned long __get_free_page(gfp_t gfp)
100 {
101 void *p;
102
103 posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
104 return (unsigned long)p;
105 }
106
free_page(unsigned long addr)107 static inline void free_page(unsigned long addr)
108 {
109 free((void *)addr);
110 }
111
112 # ifndef likely
113 # define likely(x) (__builtin_expect(!!(x), 1))
114 # endif
115 # ifndef unlikely
116 # define unlikely(x) (__builtin_expect(!!(x), 0))
117 # endif
118
krealloc_array(void * p,size_t new_n,size_t new_size,gfp_t gfp)119 static inline void *krealloc_array(void *p, size_t new_n, size_t new_size, gfp_t gfp)
120 {
121 size_t bytes;
122
123 if (unlikely(check_mul_overflow(new_n, new_size, &bytes)))
124 return NULL;
125
126 return krealloc(p, bytes, gfp);
127 }
128
129 #define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
130 #ifdef DEBUG
131 #define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
132 #else
133 #define pr_debug(format, ...) do {} while (0)
134 #endif
135 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
136 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
137 #define dev_warn_once(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
138
139 #define dev_WARN_ONCE(dev, condition, format...) \
140 WARN_ONCE(condition, format)
141
is_vmalloc_addr(const void * x)142 static inline bool is_vmalloc_addr(const void *x)
143 {
144 return false;
145 }
146
147 #define might_sleep() do { } while (0)
148
synchronize_rcu(void)149 static inline void synchronize_rcu(void)
150 {
151 assert(0);
152 }
153
154 #define min(x, y) ({ \
155 typeof(x) _min1 = (x); \
156 typeof(y) _min2 = (y); \
157 (void) (&_min1 == &_min2); \
158 _min1 < _min2 ? _min1 : _min2; })
159
160 #endif /* KERNEL_H */
161