1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef KERNEL_H 3*4882a593Smuzhiyun #define KERNEL_H 4*4882a593Smuzhiyun #include <stdbool.h> 5*4882a593Smuzhiyun #include <stdlib.h> 6*4882a593Smuzhiyun #include <stddef.h> 7*4882a593Smuzhiyun #include <stdio.h> 8*4882a593Smuzhiyun #include <string.h> 9*4882a593Smuzhiyun #include <assert.h> 10*4882a593Smuzhiyun #include <stdarg.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <linux/compiler.h> 13*4882a593Smuzhiyun #include <linux/types.h> 14*4882a593Smuzhiyun #include <linux/list.h> 15*4882a593Smuzhiyun #include <linux/printk.h> 16*4882a593Smuzhiyun #include <linux/bug.h> 17*4882a593Smuzhiyun #include <errno.h> 18*4882a593Smuzhiyun #include <unistd.h> 19*4882a593Smuzhiyun #include <asm/barrier.h> 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #define CONFIG_SMP 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #define PAGE_SIZE getpagesize() 24*4882a593Smuzhiyun #define PAGE_MASK (~(PAGE_SIZE-1)) 25*4882a593Smuzhiyun #define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK) 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* generic data direction definitions */ 28*4882a593Smuzhiyun #define READ 0 29*4882a593Smuzhiyun #define WRITE 1 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun typedef unsigned long long phys_addr_t; 32*4882a593Smuzhiyun typedef unsigned long long dma_addr_t; 33*4882a593Smuzhiyun typedef size_t __kernel_size_t; 34*4882a593Smuzhiyun typedef unsigned int __wsum; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun struct page { 37*4882a593Smuzhiyun unsigned long long dummy; 38*4882a593Smuzhiyun }; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* Physical == Virtual */ 41*4882a593Smuzhiyun #define virt_to_phys(p) ((unsigned long)p) 42*4882a593Smuzhiyun #define phys_to_virt(a) ((void *)(unsigned long)(a)) 43*4882a593Smuzhiyun /* Page address: Virtual / 4K */ 44*4882a593Smuzhiyun #define page_to_phys(p) ((dma_addr_t)(unsigned long)(p)) 45*4882a593Smuzhiyun #define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK)) 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE) 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun #define __printf(a,b) __attribute__((format(printf,a,b))) 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end; 54*4882a593Smuzhiyun static inline void *kmalloc(size_t s, gfp_t gfp) 55*4882a593Smuzhiyun { 56*4882a593Smuzhiyun if (__kmalloc_fake) 57*4882a593Smuzhiyun return __kmalloc_fake; 58*4882a593Smuzhiyun return malloc(s); 59*4882a593Smuzhiyun } 60*4882a593Smuzhiyun static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp) 61*4882a593Smuzhiyun { 62*4882a593Smuzhiyun return kmalloc(n * s, gfp); 63*4882a593Smuzhiyun } 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun static inline void *kzalloc(size_t s, gfp_t gfp) 66*4882a593Smuzhiyun { 67*4882a593Smuzhiyun void *p = kmalloc(s, gfp); 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun memset(p, 0, s); 70*4882a593Smuzhiyun return p; 71*4882a593Smuzhiyun } 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun static inline void *alloc_pages_exact(size_t s, gfp_t gfp) 74*4882a593Smuzhiyun { 75*4882a593Smuzhiyun return kmalloc(s, gfp); 76*4882a593Smuzhiyun } 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun static inline void kfree(void *p) 79*4882a593Smuzhiyun { 80*4882a593Smuzhiyun if (p >= __kfree_ignore_start && p < __kfree_ignore_end) 81*4882a593Smuzhiyun return; 82*4882a593Smuzhiyun free(p); 83*4882a593Smuzhiyun } 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun static inline void free_pages_exact(void *p, size_t s) 86*4882a593Smuzhiyun { 87*4882a593Smuzhiyun kfree(p); 88*4882a593Smuzhiyun } 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun static inline void *krealloc(void *p, size_t s, gfp_t gfp) 91*4882a593Smuzhiyun { 92*4882a593Smuzhiyun return realloc(p, s); 93*4882a593Smuzhiyun } 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun 96*4882a593Smuzhiyun static inline unsigned long __get_free_page(gfp_t gfp) 97*4882a593Smuzhiyun { 98*4882a593Smuzhiyun void *p; 99*4882a593Smuzhiyun 100*4882a593Smuzhiyun posix_memalign(&p, PAGE_SIZE, PAGE_SIZE); 101*4882a593Smuzhiyun return (unsigned long)p; 102*4882a593Smuzhiyun } 103*4882a593Smuzhiyun 104*4882a593Smuzhiyun static inline void free_page(unsigned long addr) 105*4882a593Smuzhiyun { 106*4882a593Smuzhiyun free((void *)addr); 107*4882a593Smuzhiyun } 108*4882a593Smuzhiyun 109*4882a593Smuzhiyun #define container_of(ptr, type, member) ({ \ 110*4882a593Smuzhiyun const typeof( ((type *)0)->member ) *__mptr = (ptr); \ 111*4882a593Smuzhiyun (type *)( (char *)__mptr - offsetof(type,member) );}) 112*4882a593Smuzhiyun 113*4882a593Smuzhiyun # ifndef likely 114*4882a593Smuzhiyun # define likely(x) (__builtin_expect(!!(x), 1)) 115*4882a593Smuzhiyun # endif 116*4882a593Smuzhiyun # ifndef unlikely 117*4882a593Smuzhiyun # define unlikely(x) (__builtin_expect(!!(x), 0)) 118*4882a593Smuzhiyun # endif 119*4882a593Smuzhiyun 120*4882a593Smuzhiyun #define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__) 121*4882a593Smuzhiyun #ifdef DEBUG 122*4882a593Smuzhiyun #define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__) 123*4882a593Smuzhiyun #else 124*4882a593Smuzhiyun #define pr_debug(format, ...) do {} while (0) 125*4882a593Smuzhiyun #endif 126*4882a593Smuzhiyun #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__) 127*4882a593Smuzhiyun #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__) 128*4882a593Smuzhiyun 129*4882a593Smuzhiyun #define WARN_ON_ONCE(cond) (unlikely(cond) ? fprintf (stderr, "WARNING\n") : 0) 130*4882a593Smuzhiyun 131*4882a593Smuzhiyun #define min(x, y) ({ \ 132*4882a593Smuzhiyun typeof(x) _min1 = (x); \ 133*4882a593Smuzhiyun typeof(y) _min2 = (y); \ 134*4882a593Smuzhiyun (void) (&_min1 == &_min2); \ 135*4882a593Smuzhiyun _min1 < _min2 ? _min1 : _min2; }) 136*4882a593Smuzhiyun 137*4882a593Smuzhiyun #endif /* KERNEL_H */ 138