fada46f06f448b00538ea9f66883f9fcd9dd52bc
[ust.git] / share / kernelcompat.h
1 #ifndef KERNELCOMPAT_H
2 #define KERNELCOMPAT_H
3
4 #include <compiler.h>
5 #include <kcompat.h>
6
7 #include <string.h>
8 #include <sys/time.h>
9
10 /* FIXME: libkcompat must not define arch-specific local ops, as ust *must*
11 * fallback to the normal atomic ops. Fix things so we don't add them and
12 * break things accidentally.
13 */
14
15 #define container_of(ptr, type, member) ({ \
16 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
17 (type *)( (char *)__mptr - offsetof(type,member) );})
18
19 #define KERN_DEBUG ""
20 #define KERN_NOTICE ""
21 #define KERN_INFO ""
22 #define KERN_ERR ""
23 #define KERN_ALERT ""
24 #define KERN_WARNING ""
25
26 /* ERROR OPS */
27
28 #define MAX_ERRNO 4095
29
30 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
31
32 static inline void *ERR_PTR(long error)
33 {
34 return (void *) error;
35 }
36
37 static inline long PTR_ERR(const void *ptr)
38 {
39 return (long) ptr;
40 }
41
42 static inline long IS_ERR(const void *ptr)
43 {
44 return IS_ERR_VALUE((unsigned long)ptr);
45 }
46
47
48 /* Min / Max */
49
50 #define min_t(type, x, y) ({ \
51 type __min1 = (x); \
52 type __min2 = (y); \
53 __min1 < __min2 ? __min1: __min2; })
54
55 #define max_t(type, x, y) ({ \
56 type __max1 = (x); \
57 type __max2 = (y); \
58 __max1 > __max2 ? __max1: __max2; })
59
60
61 /* MUTEXES */
62
63 #include <pthread.h>
64
65 #define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
66 #define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
67
68 #define mutex_lock(m) pthread_mutex_lock(m)
69
70 #define mutex_unlock(m) pthread_mutex_unlock(m)
71
72
73 /* MALLOCATION */
74
75 #include <stdlib.h>
76
77 #define kmalloc(s, t) malloc(s)
78 #define kzalloc(s, t) zmalloc(s)
79 #define kfree(p) free((void *)p)
80 #define kstrdup(s, t) strdup(s)
81
82 #define zmalloc(s) calloc(1, s)
83
84 #define GFP_KERNEL
85
86 /* PRINTK */
87
88 #include <stdio.h>
89 #define printk(fmt, args...) printf(fmt, ## args)
90
91
92 /* ATTRIBUTES */
93
94 #define ____cacheline_aligned
95 #define __init
96 #define __exit
97
98 /* MATH */
99
100 static inline unsigned int hweight32(unsigned int w)
101 {
102 unsigned int res = w - ((w >> 1) & 0x55555555);
103 res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
104 res = (res + (res >> 4)) & 0x0F0F0F0F;
105 res = res + (res >> 8);
106 return (res + (res >> 16)) & 0x000000FF;
107 }
108
109 static inline int fls(int x)
110 {
111 int r;
112 //ust// #ifdef CONFIG_X86_CMOV
113 asm("bsrl %1,%0\n\t"
114 "cmovzl %2,%0"
115 : "=&r" (r) : "rm" (x), "rm" (-1));
116 //ust// #else
117 //ust// asm("bsrl %1,%0\n\t"
118 //ust// "jnz 1f\n\t"
119 //ust// "movl $-1,%0\n"
120 //ust// "1:" : "=r" (r) : "rm" (x));
121 //ust// #endif
122 return r + 1;
123 }
124
125 static __inline__ int get_count_order(unsigned int count)
126 {
127 int order;
128
129 order = fls(count) - 1;
130 if (count & (count - 1))
131 order++;
132 return order;
133 }
134
135
136
137
138 #include <unistd.h>
139
140 #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
141 #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
142 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
143 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
144 #define PAGE_MASK (~(PAGE_SIZE-1))
145
146
147
148
149 /* ARRAYS */
150
151 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
152
153 /* TRACE CLOCK */
154
155 static inline u64 trace_clock_read64(void)
156 {
157 uint32_t low;
158 uint32_t high;
159 uint64_t retval;
160 __asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
161
162 retval = high;
163 retval <<= 32;
164 return retval | low;
165 }
166
167 //static inline u64 trace_clock_read64(void)
168 //{
169 // struct timeval tv;
170 // u64 retval;
171 //
172 // gettimeofday(&tv, NULL);
173 // retval = tv.tv_sec;
174 // retval *= 1000000;
175 // retval += tv.tv_usec;
176 //
177 // return retval;
178 //}
179
180 static inline u64 trace_clock_frequency(void)
181 {
182 return 1000000LL;
183 }
184
185 static inline u32 trace_clock_freq_scale(void)
186 {
187 return 1;
188 }
189
190
191 #endif /* KERNELCOMPAT_H */
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