sim/common/sim-cpu.c

   1 /* CPU support.
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include <stdlib.h>
  24
  25 #include "sim-main.h"
  26 #include "bfd.h"
  27
  28 /* Allocate space for all cpus in the simulator.
  29    Space for the cpu must currently exist prior to parsing ARGV.  */
  30 /* ??? wip.  better solution must wait.  */
  31
  32 SIM_RC
  33 sim_cpu_alloc_all (SIM_DESC sd, int ncpus)
  34 {
  35   int c;
  36
  37   for (c = 0; c < ncpus; ++c)
  38     STATE_CPU (sd, c) = sim_cpu_alloc (sd);
  39   return SIM_RC_OK;
  40 }
  41
  42 /* Allocate space for a cpu object.
  43    EXTRA_BYTES is additional space to allocate for the sim_cpu struct.  */
  44
  45 sim_cpu *
  46 sim_cpu_alloc (SIM_DESC sd)
  47 {
  48   int extra_bytes = 0;
  49
  50 #ifdef CGEN_ARCH
  51   extra_bytes += cgen_cpu_max_extra_bytes (sd);
  52 #endif
  53
  54   return zalloc (sizeof (sim_cpu) + extra_bytes);
  55 }
  56
  57 /* Free all resources held by all cpus.  */
  58
  59 void
  60 sim_cpu_free_all (SIM_DESC sd)
  61 {
  62   int c;
  63
  64   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
  65     if (STATE_CPU (sd, c))
  66       sim_cpu_free (STATE_CPU (sd, c));
  67 }
  68
  69 /* Free all resources used by CPU.  */
  70
  71 void
  72 sim_cpu_free (sim_cpu *cpu)
  73 {
  74   free (cpu);
  75 }
  76 \f
  77 /* PC utilities.  */
  78
  79 sim_cia
  80 sim_pc_get (sim_cpu *cpu)
  81 {
  82   return (* CPU_PC_FETCH (cpu)) (cpu);
  83 }
  84
  85 void
  86 sim_pc_set (sim_cpu *cpu, sim_cia newval)
  87 {
  88   (* CPU_PC_STORE (cpu)) (cpu, newval);
  89 }