sim/cris/crisv10f.c

/* CRIS v10 simulator support code
   Copyright (C) 2004-2021 Free Software Foundation, Inc.
   Contributed by Axis Communications.

This file is part of the GNU simulators.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* The infrastructure is based on that of i960.c.  */

/* This must come before any other includes.  */
#include "defs.h"

#define WANT_CPU_CRISV10F

#define BASENUM 10
#define CRIS_TLS_REGISTER 14
#include "cris-tmpl.c"

#if WITH_PROFILE_MODEL_P

/* Model function for u-multiply unit.  */

int
MY (XCONCAT3 (f_model_crisv,BASENUM,
	      _u_multiply)) (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
			     const IDESC *idesc ATTRIBUTE_UNUSED,
			     int unit_num ATTRIBUTE_UNUSED,
			     int referenced ATTRIBUTE_UNUSED)
{
  return 1;
}

#endif /* WITH_PROFILE_MODEL_P */

/* Do the interrupt sequence if possible, and return 1.  If interrupts
   are disabled or some other lockout is active, return 0 and do
   nothing.

   Beware, the v10 implementation is incomplete and doesn't properly
   lock out interrupts e.g. after special-register access and doesn't
   handle user-mode.  */

int
MY (deliver_interrupt) (SIM_CPU *current_cpu,
			enum cris_interrupt_type type,
			unsigned int vec)
{
  unsigned char entryaddr_le[4];
  int was_user;
  SIM_DESC sd = CPU_STATE (current_cpu);
  unsigned32 entryaddr;

  /* We haven't implemented other interrupt-types yet.  */
  if (type != CRIS_INT_INT)
    abort ();

  /* We're supposed to be called outside of prefixes and branch
     delay-slots etc, but why not check.  */
  if (GET_H_INSN_PREFIXED_P ())
    abort ();

  if (!GET_H_IBIT ())
    return 0;

  /* User mode isn't supported for interrupts.  (And we shouldn't see
     this as 1 anyway.  The user-mode bit isn't visible from user
     mode.  It doesn't make it into the U bit until the next
     interrupt/exception.)  */
  if (GET_H_UBIT ())
    abort ();

  SET_H_PBIT (1);

  if (sim_core_read_buffer (sd,
			    current_cpu,
			    read_map, entryaddr_le,
			    GET_H_SR (H_SR_PRE_V32_IBR) + vec * 4, 4) == 0)
    {
      /* Nothing to do actually; either abort or send a signal.  */
      sim_core_signal (sd, current_cpu, CPU_PC_GET (current_cpu), 0, 4,
		       GET_H_SR (H_SR_PRE_V32_IBR) + vec * 4,
		       read_transfer, sim_core_unmapped_signal);
      return 0;
    }

  entryaddr = bfd_getl32 (entryaddr_le);

  SET_H_SR (H_SR_PRE_V32_IRP, GET_H_PC ());
  SET_H_PC (entryaddr);

  return 1;
}