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/* frv simulator support code

   Copyright (C) 1999, 2000, 2001, 2003, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

   Contributed by Red Hat.

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/>.  */

#define WANT_CPU

#define WANT_CPU_FRVBF

#include "sim-main.h"

#include "bfd.h"

/* Initialize the frv simulator.  */

void

frv_initialize (SIM_CPU *current_cpu, SIM_DESC sd)

{

  FRV_PROFILE_STATE *ps = CPU_PROFILE_STATE (current_cpu);

  PROFILE_DATA *p = CPU_PROFILE_DATA (current_cpu);

  FRV_CACHE *insn_cache = CPU_INSN_CACHE (current_cpu);

  FRV_CACHE *data_cache = CPU_DATA_CACHE (current_cpu);

  int insn_cache_enabled = CACHE_INITIALIZED (insn_cache);

  int data_cache_enabled = CACHE_INITIALIZED (data_cache);

  USI hsr0;

  /* Initialize the register control information first since some of the

     register values are used in further configuration.  */

  frv_register_control_init (current_cpu);

  /* We need to ensure that the caches are initialized even if they are not

     initially enabled (via commandline) because they can be enabled by

     software.  */

  if (! insn_cache_enabled)

    frv_cache_init (current_cpu, CPU_INSN_CACHE (current_cpu));

  if (! data_cache_enabled)

    frv_cache_init (current_cpu, CPU_DATA_CACHE (current_cpu));

  /* Set the default cpu frequency if it has not been set on the command

     line.  */

  if (PROFILE_CPU_FREQ (p) == 0)

    PROFILE_CPU_FREQ (p) = 266000000; /* 266MHz */

  /* Allocate one cache line of memory containing the address of the reset

     register Use the largest of the insn cache line size and the data cache

     line size.  */

  {

    int addr = RSTR_ADDRESS;

    void *aligned_buffer;

    int bytes;

    if (CPU_INSN_CACHE (current_cpu)->line_size

        > CPU_DATA_CACHE (current_cpu)->line_size)

      bytes = CPU_INSN_CACHE (current_cpu)->line_size;

    else

      bytes = CPU_DATA_CACHE (current_cpu)->line_size;

    /* 'bytes' is a power of 2. Calculate the starting address of the

       cache line.  */

    addr &= ~(bytes - 1);

    aligned_buffer = zalloc (bytes); /* clear */

    sim_core_attach (sd, NULL, 0, access_read_write, 0, addr, bytes,

                     0, NULL, aligned_buffer);

  }

  PROFILE_INFO_CPU_CALLBACK(p) = frv_profile_info;

  ps->insn_fetch_address = -1;

  ps->branch_address = -1;

  cgen_init_accurate_fpu (current_cpu, CGEN_CPU_FPU (current_cpu),

                          frvbf_fpu_error);

  /* Now perform power-on reset.  */

  frv_power_on_reset (current_cpu);

  /* Make sure that HSR0.ICE and HSR0.DCE are set properly.  */

  hsr0 = GET_HSR0 ();

  if (insn_cache_enabled)

    SET_HSR0_ICE (hsr0);

  else

    CLEAR_HSR0_ICE (hsr0);

  if (data_cache_enabled)

    SET_HSR0_DCE (hsr0);

  else

    CLEAR_HSR0_DCE (hsr0);

  SET_HSR0 (hsr0);

}

/* Initialize the frv simulator.  */

void

frv_term (SIM_DESC sd)

{

  /* If the timer is enabled, and model profiling was not originally enabled,

     then turn it off again.  This is the only place we can currently gain

     control to do this.  */

  if (frv_interrupt_state.timer.enabled && ! frv_save_profile_model_p)

    sim_profile_set_option (current_state, "-model", PROFILE_MODEL_IDX, "0");

}

/* Perform a power on reset.  */

void

frv_power_on_reset (SIM_CPU *cpu)

{

  /* GR, FR and CPR registers are undefined at initialization time.  */

  frv_initialize_spr (cpu);

  /* Initialize the RSTR register (in memory).  */

  if (frv_cache_enabled (CPU_DATA_CACHE (cpu)))

    frvbf_mem_set_SI (cpu, CPU_PC_GET (cpu), RSTR_ADDRESS, RSTR_INITIAL_VALUE);

  else

    SETMEMSI (cpu, CPU_PC_GET (cpu), RSTR_ADDRESS, RSTR_INITIAL_VALUE);

}

/* Perform a hardware reset.  */

void

frv_hardware_reset (SIM_CPU *cpu)

{

  /* GR, FR and CPR registers are undefined at hardware reset.  */

  frv_initialize_spr (cpu);

  /* Reset the RSTR register (in memory).  */

  if (frv_cache_enabled (CPU_DATA_CACHE (cpu)))

    frvbf_mem_set_SI (cpu, CPU_PC_GET (cpu), RSTR_ADDRESS, RSTR_HARDWARE_RESET);

  else

    SETMEMSI (cpu, CPU_PC_GET (cpu), RSTR_ADDRESS, RSTR_HARDWARE_RESET);

  /* Reset the insn and data caches.  */

  frv_cache_invalidate_all (CPU_INSN_CACHE (cpu), 0/* no flush */);

  frv_cache_invalidate_all (CPU_DATA_CACHE (cpu), 0/* no flush */);

}

/* Perform a software reset.  */

void

frv_software_reset (SIM_CPU *cpu)

{

  /* GR, FR and CPR registers are undefined at software reset.  */

  frv_reset_spr (cpu);

  /* Reset the RSTR register (in memory).  */

  if (frv_cache_enabled (CPU_DATA_CACHE (cpu)))

    frvbf_mem_set_SI (cpu, CPU_PC_GET (cpu), RSTR_ADDRESS, RSTR_SOFTWARE_RESET);

  else

    SETMEMSI (cpu, CPU_PC_GET (cpu), RSTR_ADDRESS, RSTR_SOFTWARE_RESET);

}