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