76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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/*
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* File : cpu.c
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* COPYRIGHT (C) 2008 - 2016, 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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* 2010-07-09 Bernard first version
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* 2010-09-11 Bernard add CPU reset implementation
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*/
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#include <rtthread.h>
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#include <board.h>
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/**
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* @addtogroup Ingenic
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*/
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/*@{*/
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/**
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* this function will reset CPU
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*
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*/
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void rt_hw_cpu_reset()
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{
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/* open the watch-dog */
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REG_WDT_TCSR = WDT_TCSR_EXT_EN;
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REG_WDT_TCSR |= WDT_TCSR_PRESCALE_1024;
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REG_WDT_TDR = 0x03;
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REG_WDT_TCNT = 0x00;
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REG_WDT_TCER |= WDT_TCER_TCEN;
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rt_kprintf("reboot system...\n");
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while (1);
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}
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/**
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* this function will shutdown CPU
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*
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*/
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void rt_hw_cpu_shutdown()
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{
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rt_kprintf("shutdown...\n");
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while (1);
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}
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/**
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* This function finds the first bit set (beginning with the least significant bit)
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* in value and return the index of that bit.
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*
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* Bits are numbered starting at 1 (the least significant bit). A return value of
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* zero from any of these functions means that the argument was zero.
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*
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* @return return the index of the first bit set. If value is 0, then this function
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* shall return 0.
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*/
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int __rt_ffs(int value)
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{
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return __builtin_ffs(value);
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}
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/*@}*/
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