93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
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/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include <interrupt.h>
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#include <rthw.h>
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#include <board.h>
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#include <platform.h>
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#include <encoding.h>
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#include <interrupt.h>
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extern void use_default_clocks(void);
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extern void use_pll(int refsel, int bypass, int r, int f, int q);
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#define TICK_COUNT (2 * RTC_FREQ / RT_TICK_PER_SECOND)
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#define MTIME (*((volatile uint64_t *)(CLINT_CTRL_ADDR + CLINT_MTIME)))
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#define MTIMECMP (*((volatile uint64_t *)(CLINT_CTRL_ADDR + CLINT_MTIMECMP)))
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/* system tick interrupt */
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void handle_m_time_interrupt()
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{
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MTIMECMP = MTIME + TICK_COUNT;
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rt_tick_increase();
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}
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/* fixed misaligned bug for qemu */
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void *__wrap_memset(void *s, int c, size_t n)
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{
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return rt_memset(s, c, n);
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}
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static void rt_hw_clock_init(void)
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{
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use_default_clocks();
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use_pll(0, 0, 1, 31, 1);
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}
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static void rt_hw_timer_init(void)
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{
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MTIMECMP = MTIME + TICK_COUNT;
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/* enable timer interrupt*/
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set_csr(mie, MIP_MTIP);
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}
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void rt_hw_board_init(void)
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{
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/* initialize the system clock */
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rt_hw_clock_init();
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/* initialize hardware interrupt */
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rt_hw_interrupt_init();
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/* initialize timer0 */
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rt_hw_timer_init();
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#ifdef RT_USING_HEAP
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rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
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#endif
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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#ifdef RT_USING_CONSOLE
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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return;
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}
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