sim/lm32/lm32.c

   1 /* Lattice Mico32 simulator support code.
   2    Contributed by Jon Beniston <jon@beniston.com>
   3
   4    Copyright (C) 2009-2021 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* This must come before any other includes.  */
  22 #include "defs.h"
  23
  24 #define WANT_CPU lm32bf
  25 #define WANT_CPU_LM32BF
  26
  27 #include "sim-main.h"
  28 #include "cgen-mem.h"
  29 #include "cgen-ops.h"
  30
  31 /* The contents of BUF are in target byte order.  */
  32
  33 int
  34 lm32bf_fetch_register (SIM_CPU * current_cpu, int rn, unsigned char *buf,
  35                        int len)
  36 {
  37   if (rn < 32)
  38     SETTSI (buf, lm32bf_h_gr_get (current_cpu, rn));
  39   else
  40     switch (rn)
  41       {
  42       case SIM_LM32_PC_REGNUM:
  43         SETTSI (buf, lm32bf_h_pc_get (current_cpu));
  44         break;
  45       default:
  46         return 0;
  47       }
  48
  49   return -1;
  50 }
  51
  52 /* The contents of BUF are in target byte order.  */
  53
  54 int
  55 lm32bf_store_register (SIM_CPU * current_cpu, int rn, unsigned char *buf,
  56                        int len)
  57 {
  58   if (rn < 32)
  59     lm32bf_h_gr_set (current_cpu, rn, GETTSI (buf));
  60   else
  61     switch (rn)
  62       {
  63       case SIM_LM32_PC_REGNUM:
  64         lm32bf_h_pc_set (current_cpu, GETTSI (buf));
  65         break;
  66       default:
  67         return 0;
  68       }
  69
  70   return -1;
  71 }
  72
  73
  74
  75 #if WITH_PROFILE_MODEL_P
  76
  77 /* Initialize cycle counting for an insn.
  78    FIRST_P is non-zero if this is the first insn in a set of parallel
  79    insns.  */
  80
  81 void
  82 lm32bf_model_insn_before (SIM_CPU * cpu, int first_p)
  83 {
  84 }
  85
  86 /* Record the cycles computed for an insn.
  87    LAST_P is non-zero if this is the last insn in a set of parallel insns,
  88    and we update the total cycle count.
  89    CYCLES is the cycle count of the insn.  */
  90
  91 void
  92 lm32bf_model_insn_after (SIM_CPU * cpu, int last_p, int cycles)
  93 {
  94 }
  95
  96 int
  97 lm32bf_model_lm32_u_exec (SIM_CPU * cpu, const IDESC * idesc,
  98                           int unit_num, int referenced)
  99 {
 100   return idesc->timing->units[unit_num].done;
 101 }
 102
 103 #endif /* WITH_PROFILE_MODEL_P */