share/kernelcompat.h

   1 #ifndef KERNELCOMPAT_H
   2 #define KERNELCOMPAT_H
   3
   4 #include "compiler.h"
   5
   6 #include <string.h>
   7
   8 #define container_of(ptr, type, member) ({                      \
   9         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
  10         (type *)( (char *)__mptr - offsetof(type,member) );})
  11
  12 #define KERN_DEBUG ""
  13 #define KERN_NOTICE ""
  14 #define KERN_INFO ""
  15 #define KERN_ERR ""
  16 #define KERN_ALERT ""
  17 #define KERN_WARNING ""
  18
  19 /* ERROR OPS */
  20
  21 #define MAX_ERRNO       4095
  22
  23 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
  24
  25 static inline void *ERR_PTR(long error)
  26 {
  27         return (void *) error;
  28 }
  29
  30 static inline long PTR_ERR(const void *ptr)
  31 {
  32         return (long) ptr;
  33 }
  34
  35 static inline long IS_ERR(const void *ptr)
  36 {
  37         return IS_ERR_VALUE((unsigned long)ptr);
  38 }
  39
  40
  41 /* FIXED SIZE INTEGERS */
  42
  43 #include <stdint.h>
  44
  45 typedef uint8_t u8;
  46 typedef uint16_t u16;
  47 typedef uint32_t u32;
  48 typedef uint64_t u64;
  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 /* SPINLOCKS */
  73
  74 typedef int spinlock_t;
  75
  76 #define spin_lock(a) /* nothing */
  77 #define spin_unlock(a) /* nothing */
  78 #define spin_lock_init(a) /* nothing */
  79
  80
  81 /* MALLOCATION */
  82
  83 #include <stdlib.h>
  84
  85 #define kmalloc(s, t) malloc(s)
  86 #define kzalloc(s, t) zmalloc(s)
  87 #define kfree(p) free((void *)p)
  88 #define kstrdup(s, t) strdup(s)
  89
  90 #define zmalloc(s) calloc(1, s)
  91
  92 #define GFP_KERNEL
  93
  94 /* PRINTK */
  95
  96 #include <stdio.h>
  97 #define printk(fmt, args...) printf(fmt, ## args)
  98
  99 /* MEMORY BARRIERS */
 100
 101 #define smp_rmb() do {} while(0)
 102 #define smp_wmb() do {} while(0)
 103 #define smp_mb() do {} while(0)
 104 #define smp_mb__after_atomic_inc() do {} while(0)
 105
 106 #define read_barrier_depends() do {} while(0)
 107 #define smp_read_barrier_depends() do {} while(0)
 108
 109 /* RCU */
 110
 111 #define rcu_assign_pointer(a, b) do {} while(0)
 112 #define call_rcu_sched(a,b) do {} while(0)
 113 #define rcu_barrier_sched() do {} while(0)
 114 #define rcu_read_lock_sched_notrace() do{} while (0)
 115 #define rcu_read_unlock_sched_notrace() do{} while (0)
 116
 117 /* ATOMICITY */
 118
 119 #include <signal.h>
 120
 121 typedef struct { sig_atomic_t counter; } atomic_t;
 122
 123 static inline int atomic_dec_and_test(atomic_t *p)
 124 {
 125         (p->counter)--;
 126         return !p->counter;
 127 }
 128
 129 static inline void atomic_set(atomic_t *p, int v)
 130 {
 131         p->counter=v;
 132 }
 133
 134 static inline void atomic_inc(atomic_t *p)
 135 {
 136         p->counter++;
 137 }
 138
 139 static int atomic_read(atomic_t *p)
 140 {
 141         return p->counter;
 142 }
 143
 144 #define atomic_long_t atomic_t
 145 #define atomic_long_set atomic_set
 146 #define atomic_long_read atomic_read
 147
 148 #include "asm.h"
 149
 150 #define __xg(x) ((volatile long *)(x))
 151
 152 #define cmpxchg(ptr, o, n)                                              \
 153         ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o),       \
 154                                        (unsigned long)(n), sizeof(*(ptr))))
 155
 156 static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 157                                       unsigned long new, int size)
 158 {
 159         unsigned long prev;
 160         switch (size) {
 161         case 1:
 162                 asm volatile("lock; cmpxchgb %b1,%2"
 163                              : "=a"(prev)
 164                              : "q"(new), "m"(*__xg(ptr)), "0"(old)
 165                              : "memory");
 166                 return prev;
 167         case 2:
 168                 asm volatile("lock; cmpxchgw %w1,%2"
 169                              : "=a"(prev)
 170                              : "r"(new), "m"(*__xg(ptr)), "0"(old)
 171                              : "memory");
 172                 return prev;
 173         case 4:
 174                 asm volatile("lock; cmpxchgl %k1,%2"
 175                              : "=a"(prev)
 176                              : "r"(new), "m"(*__xg(ptr)), "0"(old)
 177                              : "memory");
 178                 return prev;
 179         case 8:
 180                 asm volatile("lock; cmpxchgq %1,%2"
 181                              : "=a"(prev)
 182                              : "r"(new), "m"(*__xg(ptr)), "0"(old)
 183                              : "memory");
 184                 return prev;
 185         }
 186         return old;
 187 }
 188
 189 //#define local_cmpxchg cmpxchg
 190 #define local_cmpxchg(l, o, n) (cmpxchg(&((l)->a.counter), (o), (n)))
 191
 192 #define atomic_long_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
 193
 194
 195 /* LOCAL OPS */
 196
 197 //typedef int local_t;
 198 typedef struct
 199 {
 200         atomic_long_t a;
 201 } local_t;
 202
 203
 204 static inline void local_inc(local_t *l)
 205 {
 206         (l->a.counter)++;
 207 }
 208
 209 static inline void local_set(local_t *l, int v)
 210 {
 211         l->a.counter = v;
 212 }
 213
 214 static inline void local_add(int v, local_t *l)
 215 {
 216         l->a.counter += v;
 217 }
 218
 219 static int local_add_return(int v, local_t *l)
 220 {
 221         return l->a.counter += v;
 222 }
 223
 224 static inline int local_read(local_t *l)
 225 {
 226         return l->a.counter;
 227 }
 228
 229
 230 /* ATTRIBUTES */
 231
 232 #define ____cacheline_aligned
 233 #define __init
 234 #define __exit
 235
 236 /* MATH */
 237
 238 static inline unsigned int hweight32(unsigned int w)
 239 {
 240         unsigned int res = w - ((w >> 1) & 0x55555555);
 241         res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
 242         res = (res + (res >> 4)) & 0x0F0F0F0F;
 243         res = res + (res >> 8);
 244         return (res + (res >> 16)) & 0x000000FF;
 245 }
 246
 247 static inline int fls(int x)
 248 {
 249         int r;
 250 //ust// #ifdef CONFIG_X86_CMOV
 251         asm("bsrl %1,%0\n\t"
 252             "cmovzl %2,%0"
 253             : "=&r" (r) : "rm" (x), "rm" (-1));
 254 //ust// #else
 255 //ust//         asm("bsrl %1,%0\n\t"
 256 //ust//             "jnz 1f\n\t"
 257 //ust//             "movl $-1,%0\n"
 258 //ust//             "1:" : "=r" (r) : "rm" (x));
 259 //ust// #endif
 260         return r + 1;
 261 }
 262
 263 static __inline__ int get_count_order(unsigned int count)
 264 {
 265         int order;
 266
 267         order = fls(count) - 1;
 268         if (count & (count - 1))
 269                 order++;
 270         return order;
 271 }
 272
 273
 274
 275
 276 #include <unistd.h>
 277
 278 #define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
 279 #define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
 280 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
 281 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
 282 #define PAGE_MASK (PAGE_SIZE-1)
 283
 284
 285
 286
 287 /* ARRAYS */
 288
 289 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 290
 291 /* TRACE CLOCK */
 292
 293 //ust// static inline u64 trace_clock_read64(void)
 294 //ust// {
 295 //ust//         uint32_t low;
 296 //ust//         uint32_t high;
 297 //ust//         uint64_t retval;
 298 //ust//         __asm__ volatile ("rdtsc\n" : "=a" (low), "=d" (high));
 299 //ust//
 300 //ust//         retval = high;
 301 //ust//         retval <<= 32;
 302 //ust//         return retval | low;
 303 //ust// }
 304
 305 static inline u64 trace_clock_read64(void)
 306 {
 307         struct timeval tv;
 308         u64 retval;
 309
 310         gettimeofday(&tv, NULL);
 311         retval = tv.tv_sec;
 312         retval *= 1000000;
 313         retval += tv.tv_usec;
 314
 315         return retval;
 316 }
 317
 318 static inline u64 trace_clock_frequency(void)
 319 {
 320         return 1000000LL;
 321 }
 322
 323 static inline u32 trace_clock_freq_scale(void)
 324 {
 325         return 1;
 326 }
 327
 328
 329 /* LISTS */
 330
 331 #define list_add_rcu list_add
 332 #define list_for_each_entry_rcu list_for_each_entry
 333
 334
 335 #define EXPORT_SYMBOL_GPL(a) /*nothing*/
 336
 337 #define smp_processor_id() (-1)
 338
 339 #endif /* KERNELCOMPAT_H */