Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_MM_H
2#define _LINUX_MM_H
3
4#include <assert.h>
5#include <string.h>
6#include <stdlib.h>
7#include <errno.h>
8#include <limits.h>
9#include <stdio.h>
10
11typedef unsigned long dma_addr_t;
12
13#define unlikely
14
15#define BUG_ON(x) assert(!(x))
16
17#define WARN_ON(condition) ({ \
18 int __ret_warn_on = !!(condition); \
19 unlikely(__ret_warn_on); \
20})
21
22#define WARN_ON_ONCE(condition) ({ \
23 int __ret_warn_on = !!(condition); \
24 if (unlikely(__ret_warn_on)) \
25 assert(0); \
26 unlikely(__ret_warn_on); \
27})
28
29#define PAGE_SIZE (4096)
30#define PAGE_SHIFT (12)
31#define PAGE_MASK (~(PAGE_SIZE-1))
32
33#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
34#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
35#define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
36#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
37
38#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
39
40#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
41
42#define virt_to_page(x) ((void *)x)
43#define page_address(x) ((void *)x)
44
45static inline unsigned long page_to_phys(struct page *page)
46{
47 assert(0);
48
49 return 0;
50}
51
52#define page_to_pfn(page) ((unsigned long)(page) / PAGE_SIZE)
53#define pfn_to_page(pfn) (void *)((pfn) * PAGE_SIZE)
54
55#define __min(t1, t2, min1, min2, x, y) ({ \
56 t1 min1 = (x); \
57 t2 min2 = (y); \
58 (void) (&min1 == &min2); \
59 min1 < min2 ? min1 : min2; })
60
61#define ___PASTE(a,b) a##b
62#define __PASTE(a,b) ___PASTE(a,b)
63
64#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
65
66#define min(x, y) \
67 __min(typeof(x), typeof(y), \
68 __UNIQUE_ID(min1_), __UNIQUE_ID(min2_), \
69 x, y)
70
71#define min_t(type, x, y) \
72 __min(type, type, \
73 __UNIQUE_ID(min1_), __UNIQUE_ID(min2_), \
74 x, y)
75
76#define pagefault_disabled() (0)
77
78static inline void *kmap(struct page *page)
79{
80 assert(0);
81
82 return NULL;
83}
84
85static inline void *kmap_atomic(struct page *page)
86{
87 assert(0);
88
89 return NULL;
90}
91
92static inline void kunmap(void *addr)
93{
94 assert(0);
95}
96
97static inline void kunmap_atomic(void *addr)
98{
99 assert(0);
100}
101
102static inline unsigned long __get_free_page(unsigned int flags)
103{
104 return (unsigned long)malloc(PAGE_SIZE);
105}
106
107static inline void free_page(unsigned long page)
108{
109 free((void *)page);
110}
111
112static inline void *kmalloc(unsigned int size, unsigned int flags)
113{
114 return malloc(size);
115}
116
117static inline void *
118kmalloc_array(unsigned int n, unsigned int size, unsigned int flags)
119{
120 return malloc(n * size);
121}
122
123#define kfree(x) free(x)
124
125#define kmemleak_alloc(a, b, c, d)
126#define kmemleak_free(a)
127
128#define PageSlab(p) (0)
129#define flush_dcache_page(p)
130
131#define MAX_ERRNO 4095
132
133#define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)
134
135static inline void * __must_check ERR_PTR(long error)
136{
137 return (void *) error;
138}
139
140static inline long __must_check PTR_ERR(__force const void *ptr)
141{
142 return (long) ptr;
143}
144
145static inline bool __must_check IS_ERR(__force const void *ptr)
146{
147 return IS_ERR_VALUE((unsigned long)ptr);
148}
149
150static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
151{
152 if (IS_ERR(ptr))
153 return PTR_ERR(ptr);
154 else
155 return 0;
156}
157
158#define IS_ENABLED(x) (0)
159
160#endif