You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.3 KiB
93 lines
2.3 KiB
5 months ago
|
/*
|
||
|
|
* File : board.c
|
||
|
|
* This file is part of RT-Thread RTOS
|
||
|
|
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <interrupt.h>
|
||
|
|
#include <rthw.h>
|
||
|
|
|
||
|
|
#include <board.h>
|
||
|
|
#include <platform.h>
|
||
|
|
#include <encoding.h>
|
||
|
|
#include <interrupt.h>
|
||
|
|
|
||
|
|
extern void use_default_clocks(void);
|
||
|
|
extern void use_pll(int refsel, int bypass, int r, int f, int q);
|
||
|
|
|
||
|
|
#define TICK_COUNT (RTC_FREQ / RT_TICK_PER_SECOND)
|
||
|
|
|
||
|
|
#define MTIME (*((volatile uint64_t *)(CLINT_CTRL_ADDR + CLINT_MTIME)))
|
||
|
|
#define MTIMECMP (*((volatile uint64_t *)(CLINT_CTRL_ADDR + CLINT_MTIMECMP)))
|
||
|
|
|
||
|
|
/* system tick interrupt */
|
||
|
|
void handle_m_time_interrupt()
|
||
|
|
{
|
||
|
|
MTIMECMP = MTIME + TICK_COUNT;
|
||
|
|
rt_tick_increase();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* fixed misaligned bug for qemu */
|
||
|
|
void *__wrap_memset(void *s, int c, size_t n)
|
||
|
|
{
|
||
|
|
return rt_memset(s, c, n);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void rt_hw_clock_init(void)
|
||
|
|
{
|
||
|
|
use_default_clocks();
|
||
|
|
use_pll(0, 0, 1, 31, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void rt_hw_timer_init(void)
|
||
|
|
{
|
||
|
|
MTIMECMP = MTIME + TICK_COUNT;
|
||
|
|
|
||
|
|
/* enable timer interrupt*/
|
||
|
|
set_csr(mie, MIP_MTIP);
|
||
|
|
}
|
||
|
|
|
||
|
|
void rt_hw_board_init(void)
|
||
|
|
{
|
||
|
|
/* initialize the system clock */
|
||
|
|
rt_hw_clock_init();
|
||
|
|
|
||
|
|
/* initialize hardware interrupt */
|
||
|
|
rt_hw_interrupt_init();
|
||
|
|
|
||
|
|
/* initialize timer0 */
|
||
|
|
rt_hw_timer_init();
|
||
|
|
|
||
|
|
#ifdef RT_USING_HEAP
|
||
|
|
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef RT_USING_COMPONENTS_INIT
|
||
|
|
rt_components_board_init();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef RT_USING_CONSOLE
|
||
|
|
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|