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 34typedef unsigned long long dma_addr_t; 35typedef size_t __kernel_size_t; 36typedef unsigned int __wsum; 37 38struct 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 55extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end; 56static inline void *kmalloc(size_t s, gfp_t gfp) 57{ 58 if (__kmalloc_fake) 59 return __kmalloc_fake; 60 return malloc(s); 61} 62static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp) 63{ 64 return kmalloc(n * s, gfp); 65} 66 67static 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 75static inline void *alloc_pages_exact(size_t s, gfp_t gfp) 76{ 77 return kmalloc(s, gfp); 78} 79 80static inline void kfree(void *p) 81{ 82 if (p >= __kfree_ignore_start && p < __kfree_ignore_end) 83 return; 84 free(p); 85} 86 87static inline void free_pages_exact(void *p, size_t s) 88{ 89 kfree(p); 90} 91 92static inline void *krealloc(void *p, size_t s, gfp_t gfp) 93{ 94 return realloc(p, s); 95} 96 97 98static 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 106static 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 118static 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