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/* frv simulator support code
Copyright (C) 1999-2024 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/>. */
/* This must come before any other includes. */
#include "defs.h"
#define WANT_CPU
#define WANT_CPU_FRVBF
#include "sim-main.h"
#include "bfd.h"
#include "cgen-mem.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 (sd, "-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);
}
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