162 lines · c
1#ifndef _LINUX_MM_H2#define _LINUX_MM_H3 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 unlikely14 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#define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))55 56#define __min(t1, t2, min1, min2, x, y) ({ \57 t1 min1 = (x); \58 t2 min2 = (y); \59 (void) (&min1 == &min2); \60 min1 < min2 ? min1 : min2; })61 62#define ___PASTE(a,b) a##b63#define __PASTE(a,b) ___PASTE(a,b)64 65#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)66 67#define min(x, y) \68 __min(typeof(x), typeof(y), \69 __UNIQUE_ID(min1_), __UNIQUE_ID(min2_), \70 x, y)71 72#define min_t(type, x, y) \73 __min(type, type, \74 __UNIQUE_ID(min1_), __UNIQUE_ID(min2_), \75 x, y)76 77#define pagefault_disabled() (0)78 79static inline void *kmap(struct page *page)80{81 assert(0);82 83 return NULL;84}85 86static inline void *kmap_atomic(struct page *page)87{88 assert(0);89 90 return NULL;91}92 93static inline void kunmap(void *addr)94{95 assert(0);96}97 98static inline void kunmap_atomic(void *addr)99{100 assert(0);101}102 103static inline unsigned long __get_free_page(unsigned int flags)104{105 return (unsigned long)malloc(PAGE_SIZE);106}107 108static inline void free_page(unsigned long page)109{110 free((void *)page);111}112 113static inline void *kmalloc(unsigned int size, unsigned int flags)114{115 return malloc(size);116}117 118static inline void *119kmalloc_array(unsigned int n, unsigned int size, unsigned int flags)120{121 return malloc(n * size);122}123 124#define kfree(x) free(x)125 126#define kmemleak_alloc(a, b, c, d)127#define kmemleak_free(a)128 129#define PageSlab(p) (0)130#define flush_dcache_page(p)131 132#define MAX_ERRNO 4095133 134#define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)135 136static inline void * __must_check ERR_PTR(long error)137{138 return (void *) error;139}140 141static inline long __must_check PTR_ERR(__force const void *ptr)142{143 return (long) ptr;144}145 146static inline bool __must_check IS_ERR(__force const void *ptr)147{148 return IS_ERR_VALUE((unsigned long)ptr);149}150 151static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)152{153 if (IS_ERR(ptr))154 return PTR_ERR(ptr);155 else156 return 0;157}158 159#define IS_ENABLED(x) (0)160 161#endif162