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