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; 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 } 63 static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp) 64 { 65 return kmalloc(n * s, gfp); 66 } 67 68 #define kmalloc_obj(VAR_OR_TYPE, ...) \ 69 ((typeof(VAR_OR_TYPE) *)kmalloc(sizeof(typeof(VAR_OR_TYPE)), 0)) 70 71 #define kmalloc_objs(VAR_OR_TYPE, COUNT, ...) \ 72 ((typeof(VAR_OR_TYPE) *)kmalloc(sizeof(typeof(VAR_OR_TYPE)) * (COUNT), 0)) 73 74 static inline void *kzalloc(size_t s, gfp_t gfp) 75 { 76 void *p = kmalloc(s, gfp); 77 78 memset(p, 0, s); 79 return p; 80 } 81 82 static inline void *alloc_pages_exact(size_t s, gfp_t gfp) 83 { 84 return kmalloc(s, gfp); 85 } 86 87 static inline void kfree(void *p) 88 { 89 if (p >= __kfree_ignore_start && p < __kfree_ignore_end) 90 return; 91 free(p); 92 } 93 94 static inline void free_pages_exact(void *p, size_t s) 95 { 96 kfree(p); 97 } 98 99 static inline void *krealloc(void *p, size_t s, gfp_t gfp) 100 { 101 return realloc(p, s); 102 } 103 104 105 static inline unsigned long __get_free_page(gfp_t gfp) 106 { 107 void *p; 108 109 posix_memalign(&p, PAGE_SIZE, PAGE_SIZE); 110 return (unsigned long)p; 111 } 112 113 static inline void free_page(unsigned long addr) 114 { 115 free((void *)addr); 116 } 117 118 # ifndef likely 119 # define likely(x) (__builtin_expect(!!(x), 1)) 120 # endif 121 # ifndef unlikely 122 # define unlikely(x) (__builtin_expect(!!(x), 0)) 123 # endif 124 125 static inline void *krealloc_array(void *p, size_t new_n, size_t new_size, gfp_t gfp) 126 { 127 size_t bytes; 128 129 if (unlikely(check_mul_overflow(new_n, new_size, &bytes))) 130 return NULL; 131 132 return krealloc(p, bytes, gfp); 133 } 134 135 #define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__) 136 #ifdef DEBUG 137 #define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__) 138 #else 139 #define pr_debug(format, ...) do {} while (0) 140 #endif 141 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__) 142 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__) 143 #define dev_warn_once(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__) 144 145 #define dev_WARN_ONCE(dev, condition, format...) \ 146 WARN_ONCE(condition, format) 147 148 static inline bool is_vmalloc_addr(const void *x) 149 { 150 return false; 151 } 152 153 #define might_sleep() do { } while (0) 154 155 static inline void synchronize_rcu(void) 156 { 157 assert(0); 158 } 159 160 #define min(x, y) ({ \ 161 typeof(x) _min1 = (x); \ 162 typeof(y) _min2 = (y); \ 163 (void) (&_min1 == &_min2); \ 164 _min1 < _min2 ? _min1 : _min2; }) 165 166 #endif /* KERNEL_H */ 167