src/mcas/alpha_defns.h

   1 /*
   2 Copyright (c) 2003, Keir Fraser All rights reserved.
   3
   4 Redistribution and use in source and binary forms, with or without
   5 modification, are permitted provided that the following conditions are
   6 met:
   7
   8     * Redistributions of source code must retain the above copyright
   9     * notice, this list of conditions and the following disclaimer.
  10     * Redistributions in binary form must reproduce the above
  11     * copyright notice, this list of conditions and the following
  12     * disclaimer in the documentation and/or other materials provided
  13     * with the distribution.  Neither the name of the Keir Fraser
  14     * nor the names of its contributors may be used to endorse or
  15     * promote products derived from this software without specific
  16     * prior written permission.
  17
  18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29 */
  30
  31 #ifndef __ALPHA_DEFNS_H__
  32 #define __ALPHA_DEFNS_H__
  33
  34 #include <c_asm.h>
  35 #include <alpha/builtins.h>
  36 #include <pthread.h>
  37
  38 #ifndef ALPHA
  39 #define ALPHA
  40 #endif
  41
  42 #define CACHE_LINE_SIZE 64
  43
  44
  45 /*
  46  * I. Compare-and-swap, fetch-and-store.
  47  */
  48
  49 #define FAS32(_x,_n)  asm ( \
  50                 "1:     ldl_l   %v0, 0(%a0);" \
  51                 "       bis     %a1, 0, %t0;" \
  52                 "       stl_c   %t0, 0(%a0);" \
  53                 "       beq     %t0, 1b;", (_x), (_n))
  54 #define FAS64(_x,_n)  asm ( \
  55                 "1:     ldq_l   %v0, 0(%a0);" \
  56                 "       bis     %a1, 0, %t0;" \
  57                 "       stq_c   %t0, 0(%a0);" \
  58                 "       beq     %t0, 1b;", (_x), (_n))
  59 #define CAS32(_x,_o,_n)  asm ( \
  60                 "1:     ldl_l   %v0, 0(%a0);" \
  61                 "       cmpeq   %v0, %a1, %t0;" \
  62                 "       beq     %t0, 3f;" \
  63                 "       bis     %a2, 0, %t0;" \
  64                 "       stl_c   %t0, 0(%a0);" \
  65                 "       beq     %t0, 1b;" \
  66                 "3:", (_x), (_o), (_n))
  67 #define CAS64(_x,_o,_n)  asm ( \
  68                 "1:     ldq_l   %v0, 0(%a0);" \
  69                 "       cmpeq   %v0, %a1, %t0;" \
  70                 "       beq     %t0, 3f;" \
  71                 "       bis     %a2, 0, %t0;" \
  72                 "       stq_c   %t0, 0(%a0);" \
  73                 "       beq     %t0, 1b;" \
  74                 "3:", (_x), (_o), (_n))
  75 #define CAS(_x,_o,_n) ((sizeof (*_x) == 4)?CAS32(_x,_o,_n):CAS64(_x,_o,_n))
  76 #define FAS(_x,_n)    ((sizeof (*_x) == 4)?FAS32(_x,_n)   :FAS64(_x,_n))
  77 /* Update Integer location, return Old value. */
  78 #define CASIO(_x,_o,_n) CAS(_x,_o,_n)
  79 #define FASIO(_x,_n)    FAS(_x,_n)
  80 /* Update Pointer location, return Old value. */
  81 #define CASPO(_x,_o,_n) (void*)CAS((_x),(void*)(_o),(void*)(_n))
  82 #define FASPO(_x,_n)    (void*)FAS((_x),(void*)(_n))
  83 #define CAS32O CAS32
  84 #define CAS64O CAS64
  85
  86 /*
  87  * II. Memory barriers.
  88  *  WMB(): All preceding write operations must commit before any later writes.
  89  *  RMB(): All preceding read operations must commit before any later reads.
  90  *  MB():  All preceding memory accesses must commit before any later accesses.
  91  *
  92  *  If the compiler does not observe these barriers (but any sane compiler
  93  *  will!), then VOLATILE should be defined as 'volatile'.
  94  */
  95
  96 #define MB()  asm("mb")
  97 #define WMB() asm("wmb")
  98 #define RMB() (MB())
  99 #define VOLATILE /*volatile*/
 100
 101
 102 /*
 103  * III. Cycle counter access.
 104  */
 105
 106 #include <sys/time.h>
 107 typedef unsigned long tick_t;
 108 #define RDTICK() asm("rpcc %v0")
 109
 110
 111 /*
 112  * IV. Types.
 113  */
 114
 115 typedef unsigned char  _u8;
 116 typedef unsigned short _u16;
 117 typedef unsigned int   _u32;
 118 typedef unsigned long  _u64;
 119
 120 #endif /* __ALPHA_DEFNS_H__ */