include/sys/sysmacros.h

   1 /*****************************************************************************\
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://github.com/behlendorf/spl/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23 \*****************************************************************************/
  24
  25 #ifndef _SPL_SYSMACROS_H
  26 #define _SPL_SYSMACROS_H
  27
  28 #include <linux/module.h>
  29 #include <sys/debug.h>
  30 #include <sys/varargs.h>
  31 #include <sys/zone.h>
  32 #include <sys/signal.h>
  33
  34 #ifndef _KERNEL
  35 #define _KERNEL                         __KERNEL__
  36 #endif
  37
  38 #define FALSE                           0
  39 #define TRUE                            1
  40
  41 #define INT32_MAX                       INT_MAX
  42 #define INT32_MIN                       INT_MIN
  43 #define UINT32_MAX                      UINT_MAX
  44 #define UINT32_MIN                      UINT_MIN
  45 #define INT64_MAX                       LLONG_MAX
  46 #define INT64_MIN                       LLONG_MIN
  47 #define UINT64_MAX                      ULLONG_MAX
  48 #define UINT64_MIN                      ULLONG_MIN
  49
  50 #define NBBY                            8
  51 #define ENOTSUP                         ENOTSUPP
  52
  53 #define MAXMSGLEN                       256
  54 #define MAXNAMELEN                      256
  55 #define MAXPATHLEN                      PATH_MAX
  56
  57 #ifdef _LP64
  58 #define MAXOFFSET_T                     0x7fffffffffffffffl
  59 #else
  60 #define MAXOFFSET_T                     0x7fffffffl
  61 #endif
  62
  63 #define MAXBSIZE                        8192
  64 #define DEV_BSIZE                       512
  65 #define DEV_BSHIFT                      9 /* log2(DEV_BSIZE) */
  66
  67 #define curproc                         current
  68 #define proc_pageout                    NULL
  69 #define max_ncpus                       64
  70 #define CPU_SEQID                       smp_processor_id() /* I think... */
  71 #define _NOTE(x)
  72
  73
  74 #define RLIM64_INFINITY                 RLIM_INFINITY
  75
  76 /* 0..MAX_PRIO-1:               Process priority
  77  * 0..MAX_RT_PRIO-1:            RT priority tasks
  78  * MAX_RT_PRIO..MAX_PRIO-1:     SCHED_NORMAL tasks
  79  *
  80  * Treat shim tasks as SCHED_NORMAL tasks
  81  */
  82 #define minclsyspri                     (MAX_RT_PRIO)
  83 #define maxclsyspri                     (MAX_PRIO-1)
  84
  85 #define NICE_TO_PRIO(nice)              (MAX_RT_PRIO + (nice) + 20)
  86 #define PRIO_TO_NICE(prio)              ((prio) - MAX_RT_PRIO - 20)
  87
  88 /* Missing macros
  89  */
  90 #define PAGESIZE                        PAGE_SIZE
  91
  92 /* from Solaris sys/byteorder.h */
  93 #define BSWAP_8(x)      ((x) & 0xff)
  94 #define BSWAP_16(x)     ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
  95 #define BSWAP_32(x)     ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
  96 #define BSWAP_64(x)     ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
  97
  98 /* Map some simple functions.
  99  */
 100 #define bzero(ptr,size)                 memset(ptr,0,size)
 101 #define bcopy(src,dest,size)            memcpy(dest,src,size)
 102 #define bcmp(src,dest,size)             memcmp((src), (dest), (size_t)(size))
 103
 104 /* Dtrace probes do not exist in the linux kernel */
 105 #ifdef DTRACE_PROBE
 106 #undef  DTRACE_PROBE
 107 #endif  /* DTRACE_PROBE */
 108 #define DTRACE_PROBE(a)                                 ((void)0)
 109
 110 #ifdef DTRACE_PROBE1
 111 #undef  DTRACE_PROBE1
 112 #endif  /* DTRACE_PROBE1 */
 113 #define DTRACE_PROBE1(a, b, c)                          ((void)0)
 114
 115 #ifdef DTRACE_PROBE2
 116 #undef  DTRACE_PROBE2
 117 #endif  /* DTRACE_PROBE2 */
 118 #define DTRACE_PROBE2(a, b, c, d, e)                    ((void)0)
 119
 120 #ifdef DTRACE_PROBE3
 121 #undef  DTRACE_PROBE3
 122 #endif  /* DTRACE_PROBE3 */
 123 #define DTRACE_PROBE3(a, b, c, d, e, f, g)              ((void)0)
 124
 125 #ifdef DTRACE_PROBE4
 126 #undef  DTRACE_PROBE4
 127 #endif  /* DTRACE_PROBE4 */
 128 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 129
 130 /* Missing globals */
 131 extern char spl_version[16];
 132 extern long spl_hostid;
 133 extern char hw_serial[11];
 134 extern int p0;
 135
 136 /* Missing misc functions */
 137 extern int highbit(unsigned long i);
 138 extern uint32_t zone_get_hostid(void *zone);
 139 extern void spl_setup(void);
 140 extern void spl_cleanup(void);
 141
 142 #define makedevice(maj,min) makedev(maj,min)
 143
 144 /* common macros */
 145 #ifndef MIN
 146 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
 147 #endif
 148 #ifndef MAX
 149 #define MAX(a, b)               ((a) < (b) ? (b) : (a))
 150 #endif
 151 #ifndef ABS
 152 #define ABS(a)                  ((a) < 0 ? -(a) : (a))
 153 #endif
 154 #ifndef DIV_ROUND_UP
 155 #define DIV_ROUND_UP(n,d)       (((n) + (d) - 1) / (d))
 156 #endif
 157 #ifndef roundup
 158 #define roundup(x, y)           ((((x) + ((y) - 1)) / (y)) * (y))
 159 #endif
 160
 161 /*
 162  * Compatibility macros/typedefs needed for Solaris -> Linux port
 163  */
 164 #define P2ALIGN(x, align)    ((x) & -(align))
 165 #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
 166 #define P2ROUNDUP(x, align)  (-(-(x) & -(align)))
 167 #define P2PHASE(x, align)    ((x) & ((align) - 1))
 168 #define P2NPHASE(x, align)   (-(x) & ((align) - 1))
 169 #define ISP2(x)              (((x) & ((x) - 1)) == 0)
 170 #define IS_P2ALIGNED(v, a)   ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 171 #define P2BOUNDARY(off, len, align) \
 172                              (((off) ^ ((off) + (len) - 1)) > (align) - 1)
 173
 174 /*
 175  * Typed version of the P2* macros.  These macros should be used to ensure
 176  * that the result is correctly calculated based on the data type of (x),
 177  * which is passed in as the last argument, regardless of the data
 178  * type of the alignment.  For example, if (x) is of type uint64_t,
 179  * and we want to round it up to a page boundary using "PAGESIZE" as
 180  * the alignment, we can do either
 181  * P2ROUNDUP(x, (uint64_t)PAGESIZE)
 182  * or
 183  * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
 184  */
 185 #define P2ALIGN_TYPED(x, align, type)   \
 186         ((type)(x) & -(type)(align))
 187 #define P2PHASE_TYPED(x, align, type)   \
 188         ((type)(x) & ((type)(align) - 1))
 189 #define P2NPHASE_TYPED(x, align, type)  \
 190         (-(type)(x) & ((type)(align) - 1))
 191 #define P2ROUNDUP_TYPED(x, align, type) \
 192         (-(-(type)(x) & -(type)(align)))
 193 #define P2END_TYPED(x, align, type)     \
 194         (-(~(type)(x) & -(type)(align)))
 195 #define P2PHASEUP_TYPED(x, align, phase, type)  \
 196         ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
 197 #define P2CROSS_TYPED(x, y, align, type)        \
 198         (((type)(x) ^ (type)(y)) > (type)(align) - 1)
 199 #define P2SAMEHIGHBIT_TYPED(x, y, type) \
 200         (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
 201
 202 #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
 203
 204 /* avoid any possibility of clashing with <stddef.h> version */
 205
 206 #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
 207 #endif
 208
 209 #endif  /* _SPL_SYSMACROS_H */