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/*
Nios-sim - one simple NIOSII simulator only for personal interest and fun.
Copyright (C) 2010 chysun2000@gmail.com
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include "public.h"
#include "io_device.h"
#include "jtag_uart.h"
#include "timer.h"
#include "uart_core.h"
#include "nor_flash.h"
static struct io_device * devices[] = {
&jtag_uart_io_device,
&timer_core,
&uart_core,
&nor_flash_core
};
#define DEVICES_COUNT (sizeof(devices)/sizeof(devices[0]))
static struct io_device * last_used_device = NULL;
struct io_device * get_device(uint32_t address)
{
struct io_device * ret_val = NULL;
uint32_t i = 0;
if (last_used_device != NULL){
if(last_used_device->is_belong(address) == ADDR_IS_DEV){
return last_used_device;
}
}
for (i=0;i<DEVICES_COUNT; i++){
if (devices[i]->is_belong != NULL){
if (devices[i]->is_belong(address) == ADDR_IS_DEV){
ret_val = devices[i];
last_used_device = ret_val;
break;
}
}
}
return ret_val;
}
void init_devices(void)
{
uint32_t i = 0;
printf("--------------------------------------------------\n");
printf(" Init H/W Device Module!\n");
printf("--------------------------------------------------\n");
for (i=0;i<DEVICES_COUNT; i++){
if (devices[i]->init != NULL){
devices[i]->init(devices[i]);
}
}
printf("--------------------------------------------------\n");
}
static const uint32_t data_mask[5] = {
[1] = 0xFF,
[2] = 0xFFFF,
[4] = 0xFFFFFFFF,
};
uint32_t io_write_data(uint32_t old_data, uint32_t new_data,
uint32_t data_len)
{
uint32_t mask = data_mask[data_len];
old_data = old_data & (~mask);
new_data = new_data & mask;
return (old_data | new_data);
}
uint32_t io_write_data_mask(uint32_t old_data, uint32_t new_data,
uint32_t data_len, uint32_t valid_mask,
uint32_t only_read_mask)
{
uint32_t mask = data_mask[data_len];
new_data = new_data & mask; /* remove as the access bus width */
new_data = new_data & valid_mask; /* remove as the valid bits */
new_data = new_data & (~only_read_mask); /* remove the read-only bits */
old_data = old_data &(~mask | only_read_mask);
return (old_data | new_data);
}
uint32_t io_read_data(unsigned old_data, uint32_t data_len)
{
uint32_t mask = data_mask[data_len];
return (old_data & mask);
}
void hw_simulating(void)
{
int i = 0;
struct io_device * device = NULL;
for (i=0;i<DEVICES_COUNT; i++){
device = devices[i];
if(device->simulate != NULL){
device->simulate(device);
}
}
}
uint32_t get_io_irq_status(void)
{
int i = 0;
uint32_t irq_mask = 0;
struct io_device * device = NULL;
for (i=0;i<DEVICES_COUNT; i++){
device = devices[i];
if(device->has_irq != NULL){
if (device->has_irq(device) == DEV_HAS_IRQ){
irq_mask |= device->irq_enable_mask;
}
}
}
return irq_mask;
}
uint32_t check_reg_bit(uint32_t value, uint32_t mask)
{
if ((value & mask) == mask){
return SIM_TRUE;
}
else {
return SIM_FALSE;
}
}
/*--------------------------------------------------------------------------*/
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