include/sys/sysmacros.h

   1 /*
   2  *  This file is part of the SPL: Solaris Porting Layer.
   3  *
   4  *  Copyright (c) 2008 Lawrence Livermore National Security, LLC.
   5  *  Produced at Lawrence Livermore National Laboratory
   6  *  Written by:
   7  *          Brian Behlendorf <behlendorf1@llnl.gov>,
   8  *          Herb Wartens <wartens2@llnl.gov>,
   9  *          Jim Garlick <garlick@llnl.gov>
  10  *  UCRL-CODE-235197
  11  *
  12  *  This is free software; you can redistribute it and/or modify it
  13  *  under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This is distributed in the hope that it will be useful, but WITHOUT
  18  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  *  for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License along
  23  *  with this program; if not, write to the Free Software Foundation, Inc.,
  24  *  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
  25  */
  26
  27 #ifndef _SPL_SYSMACROS_H
  28 #define _SPL_SYSMACROS_H
  29
  30 #ifdef  __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #include <linux/module.h>
  35 #include <sys/debug.h>
  36 #include <sys/varargs.h>
  37 #include <sys/zone.h>
  38 #include <sys/signal.h>
  39
  40 #ifndef _KERNEL
  41 #define _KERNEL                         __KERNEL__
  42 #endif
  43
  44 /* Missing defines.
  45  */
  46 #define FALSE                           0
  47 #define TRUE                            1
  48
  49 #define INT32_MAX                       INT_MAX
  50 #define INT32_MIN                       INT_MIN
  51 #define UINT32_MAX                      UINT_MAX
  52 #define UINT32_MIN                      UINT_MIN
  53 #define INT64_MAX                       LLONG_MAX
  54 #define INT64_MIN                       LLONG_MIN
  55 #define UINT64_MAX                      ULLONG_MAX
  56 #define UINT64_MIN                      ULLONG_MIN
  57
  58 #define NBBY                            8
  59 #define ENOTSUP                         ENOTSUPP
  60
  61 #define MAXMSGLEN                       256
  62 #define MAXNAMELEN                      256
  63 #define MAXPATHLEN                      PATH_MAX
  64
  65 #ifdef _LP64
  66 #define MAXOFFSET_T                     0x7fffffffffffffffl
  67 #else
  68 #define MAXOFFSET_T                     0x7fffffffl
  69 #endif
  70
  71 #define MAXBSIZE                        8192
  72 #define DEV_BSIZE                       512
  73 #define DEV_BSHIFT                      9 /* log2(DEV_BSIZE) */
  74
  75 #define curproc                         current
  76 #define proc_pageout                    NULL
  77 #define max_ncpus                       64
  78 #define CPU_SEQID                       smp_processor_id() /* I think... */
  79 #define _NOTE(x)
  80
  81
  82 #define RLIM64_INFINITY                 RLIM_INFINITY
  83
  84 /* 0..MAX_PRIO-1:               Process priority
  85  * 0..MAX_RT_PRIO-1:            RT priority tasks
  86  * MAX_RT_PRIO..MAX_PRIO-1:     SCHED_NORMAL tasks
  87  *
  88  * Treat shim tasks as SCHED_NORMAL tasks
  89  */
  90 #define minclsyspri                     (MAX_RT_PRIO)
  91 #define maxclsyspri                     (MAX_PRIO-1)
  92
  93 #define NICE_TO_PRIO(nice)              (MAX_RT_PRIO + (nice) + 20)
  94 #define PRIO_TO_NICE(prio)              ((prio) - MAX_RT_PRIO - 20)
  95
  96 /* Missing macros
  97  */
  98 #define PAGESIZE                        PAGE_SIZE
  99
 100 /* from Solaris sys/byteorder.h */
 101 #define BSWAP_8(x)      ((x) & 0xff)
 102 #define BSWAP_16(x)     ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
 103 #define BSWAP_32(x)     ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
 104 #define BSWAP_64(x)     ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
 105
 106 /* Map some simple functions.
 107  */
 108 #define bzero(ptr,size)                 memset(ptr,0,size)
 109 #define bcopy(src,dest,size)            memcpy(dest,src,size)
 110 #define bcmp(src,dest,size)             memcmp((src), (dest), (size_t)(size))
 111
 112 /* Dtrace probes do not exist in the linux kernel */
 113 #ifdef DTRACE_PROBE
 114 #undef  DTRACE_PROBE
 115 #endif  /* DTRACE_PROBE */
 116 #define DTRACE_PROBE(a)                                 ((void)0)
 117
 118 #ifdef DTRACE_PROBE1
 119 #undef  DTRACE_PROBE1
 120 #endif  /* DTRACE_PROBE1 */
 121 #define DTRACE_PROBE1(a, b, c)                          ((void)0)
 122
 123 #ifdef DTRACE_PROBE2
 124 #undef  DTRACE_PROBE2
 125 #endif  /* DTRACE_PROBE2 */
 126 #define DTRACE_PROBE2(a, b, c, d, e)                    ((void)0)
 127
 128 #ifdef DTRACE_PROBE3
 129 #undef  DTRACE_PROBE3
 130 #endif  /* DTRACE_PROBE3 */
 131 #define DTRACE_PROBE3(a, b, c, d, e, f, g)              ((void)0)
 132
 133 #ifdef DTRACE_PROBE4
 134 #undef  DTRACE_PROBE4
 135 #endif  /* DTRACE_PROBE4 */
 136 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 137
 138 /* Missing globals */
 139 extern char spl_version[16];
 140 extern long spl_hostid;
 141 extern char hw_serial[11];
 142 extern int p0;
 143
 144 /* Missing misc functions */
 145 extern int highbit(unsigned long i);
 146 extern uint32_t zone_get_hostid(void *zone);
 147 extern void spl_setup(void);
 148 extern void spl_cleanup(void);
 149
 150 #define makedevice(maj,min) makedev(maj,min)
 151
 152 /* common macros */
 153 #ifndef MIN
 154 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
 155 #endif
 156 #ifndef MAX
 157 #define MAX(a, b)               ((a) < (b) ? (b) : (a))
 158 #endif
 159 #ifndef ABS
 160 #define ABS(a)                  ((a) < 0 ? -(a) : (a))
 161 #endif
 162 #ifndef DIV_ROUND_UP
 163 #define DIV_ROUND_UP(n,d)       (((n) + (d) - 1) / (d))
 164 #endif
 165 #ifndef roundup
 166 #define roundup(x, y)           ((((x) + ((y) - 1)) / (y)) * (y))
 167 #endif
 168
 169 /*
 170  * Compatibility macros/typedefs needed for Solaris -> Linux port
 171  */
 172 #define P2ALIGN(x, align)    ((x) & -(align))
 173 #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
 174 #define P2ROUNDUP(x, align)  (-(-(x) & -(align)))
 175 #define P2PHASE(x, align)    ((x) & ((align) - 1))
 176 #define P2NPHASE(x, align)   (-(x) & ((align) - 1))
 177 #define ISP2(x)              (((x) & ((x) - 1)) == 0)
 178 #define IS_P2ALIGNED(v, a)   ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 179 #define P2BOUNDARY(off, len, align) \
 180                              (((off) ^ ((off) + (len) - 1)) > (align) - 1)
 181
 182 /*
 183  * Typed version of the P2* macros.  These macros should be used to ensure
 184  * that the result is correctly calculated based on the data type of (x),
 185  * which is passed in as the last argument, regardless of the data
 186  * type of the alignment.  For example, if (x) is of type uint64_t,
 187  * and we want to round it up to a page boundary using "PAGESIZE" as
 188  * the alignment, we can do either
 189  * P2ROUNDUP(x, (uint64_t)PAGESIZE)
 190  * or
 191  * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
 192  */
 193 #define P2ALIGN_TYPED(x, align, type)   \
 194         ((type)(x) & -(type)(align))
 195 #define P2PHASE_TYPED(x, align, type)   \
 196         ((type)(x) & ((type)(align) - 1))
 197 #define P2NPHASE_TYPED(x, align, type)  \
 198         (-(type)(x) & ((type)(align) - 1))
 199 #define P2ROUNDUP_TYPED(x, align, type) \
 200         (-(-(type)(x) & -(type)(align)))
 201 #define P2END_TYPED(x, align, type)     \
 202         (-(~(type)(x) & -(type)(align)))
 203 #define P2PHASEUP_TYPED(x, align, phase, type)  \
 204         ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
 205 #define P2CROSS_TYPED(x, y, align, type)        \
 206         (((type)(x) ^ (type)(y)) > (type)(align) - 1)
 207 #define P2SAMEHIGHBIT_TYPED(x, y, type) \
 208         (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
 209
 210 #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
 211
 212 /* avoid any possibility of clashing with <stddef.h> version */
 213
 214 #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
 215 #endif
 216
 217 #ifdef  __cplusplus
 218 }
 219 #endif
 220
 221 #endif  /* _SPL_SYSMACROS_H */