1 /* SPDX-License-Identifier: GPL-2.0 */
12 #include <linux/compiler.h>
13 #include <linux/types.h>
14 #include <linux/printk.h>
15 #include <linux/bug.h>
18 #include <asm/barrier.h>
22 #define PAGE_SIZE getpagesize()
23 #define PAGE_MASK (~(PAGE_SIZE-1))
24 #define PAGE_ALIGN(x) ((x + PAGE_SIZE - 1) & PAGE_MASK)
26 /* generic data direction definitions */
30 typedef unsigned long long phys_addr_t;
31 typedef unsigned long long dma_addr_t;
32 typedef size_t __kernel_size_t;
33 typedef unsigned int __wsum;
36 unsigned long long dummy;
39 /* Physical == Virtual */
40 #define virt_to_phys(p) ((unsigned long)p)
41 #define phys_to_virt(a) ((void *)(unsigned long)(a))
42 /* Page address: Virtual / 4K */
43 #define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
44 #define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))
46 #define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)
48 #define __printf(a,b) __attribute__((format(printf,a,b)))
50 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
52 extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
53 static inline void *kmalloc(size_t s, gfp_t gfp)
56 return __kmalloc_fake;
59 static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp)
61 return kmalloc(n * s, gfp);
64 static inline void *kzalloc(size_t s, gfp_t gfp)
66 void *p = kmalloc(s, gfp);
72 static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
74 return kmalloc(s, gfp);
77 static inline void kfree(void *p)
79 if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
84 static inline void free_pages_exact(void *p, size_t s)
89 static inline void *krealloc(void *p, size_t s, gfp_t gfp)
95 static inline unsigned long __get_free_page(gfp_t gfp)
99 posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
100 return (unsigned long)p;
103 static inline void free_page(unsigned long addr)
108 #define container_of(ptr, type, member) ({ \
109 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
110 (type *)( (char *)__mptr - offsetof(type,member) );})
112 #define uninitialized_var(x) x = x
115 # define likely(x) (__builtin_expect(!!(x), 1))
118 # define unlikely(x) (__builtin_expect(!!(x), 0))
121 #define pr_err(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
123 #define pr_debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)
125 #define pr_debug(format, ...) do {} while (0)
127 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
128 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
130 #define WARN_ON_ONCE(cond) ((cond) ? fprintf (stderr, "WARNING\n") : 0)
132 #define min(x, y) ({ \
133 typeof(x) _min1 = (x); \
134 typeof(y) _min2 = (y); \
135 (void) (&_min1 == &_min2); \
136 _min1 < _min2 ? _min1 : _min2; })
138 /* TODO: empty stubs for now. Broken but enough for virtio_ring.c */
139 #define list_add_tail(a, b) do {} while (0)
140 #define list_del(a) do {} while (0)
141 #define list_for_each_entry(a, b, c) while (0)
144 #endif /* KERNEL_H */