sim/txvu/engine-sky.c

   1 /*  Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
   2     Copyright (C) 1998, Cygnus Solutions
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18     */
  19
  20 #ifndef _ENGINE_C_
  21 #define _ENGINE_C_
  22
  23 #include "sim-inline.c"
  24
  25 #include "sim-main.h"
  26 #include "itable.h"
  27 #include "idecode.h"
  28 #include "semantics.h"
  29 #include "icache.h"
  30 #include "engine.h"
  31 #include "support.h"
  32
  33 #include "sim-assert.h"
  34
  35 #include "hardware.h"
  36
  37 enum {
  38   /* greater or equal to zero => table */
  39   function_entry = -1,
  40   boolean_entry = -2,
  41 };
  42
  43 typedef struct _idecode_table_entry {
  44   int shift;
  45   unsigned32 mask;
  46   unsigned32 value;
  47   void *function_or_table;
  48 } idecode_table_entry;
  49
  50
  51 INLINE_ENGINE\
  52 (void) engine_run
  53 (SIM_DESC sd,
  54  int next_cpu_nr,
  55  int siggnal)
  56 {
  57   sim_cpu *processor = NULL;
  58   instruction_address cia;
  59   int current_cpu = next_cpu_nr;
  60   instruction_word instruction_0;
  61
  62   /* Hard coded main loop.  Not pretty, but should work. */
  63   ASSERT(current_cpu >= 0 && current_cpu < NUMBER_CPUS);
  64
  65   cia = CPU_CIA (0);                    /* Only the 5900 uses this. */
  66   processor = STATE_CPU (sd, 0);        /* Only the 5900 uses this. */
  67
  68   switch(current_cpu)
  69     {
  70     case 0:
  71       goto cpu_0;
  72     case 1:
  73       goto cpu_1;
  74     case 2:
  75       goto cpu_2;
  76     case 3:
  77       goto cpu_3;
  78     case 4:
  79       goto cpu_4;
  80     }
  81
  82   while (1)
  83     {
  84
  85 cpu_0:
  86
  87       cia = CPU_CIA (processor);
  88       instruction_0 = IMEM (cia);
  89
  90 #if defined (ENGINE_ISSUE_PREFIX_HOOK)
  91       ENGINE_ISSUE_PREFIX_HOOK();
  92 #endif
  93
  94       cia = idecode_issue(sd, instruction_0, cia);
  95
  96 #if defined (ENGINE_ISSUE_POSTFIX_HOOK)
  97       ENGINE_ISSUE_POSTFIX_HOOK();
  98 #endif
  99
 100       /* Update the instruction address */
 101       CPU_CIA (processor) = cia;
 102
 103 cpu_1:
 104         pke0_issue();
 105
 106 cpu_2:
 107         pke1_issue();
 108
 109 cpu_3:
 110         vu0_issue();
 111
 112 cpu_4:
 113         vu1_issue();
 114
 115 events:
 116
 117       /* process any events */
 118       if (sim_events_tick (sd))
 119         {
 120           sim_events_process (sd);
 121         }
 122     }
 123 }
 124
 125 #endif /* _ENGINE_C_*/