?? cpu.c
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/* * File : cpu.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006, RT-Thread Develop Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://openlab.rt-thread.com/license/LICENSE * * Change Logs: * Date Author Notes * 2006-09-06 XuXinming first version */#include <rtthread.h>#include "s3c44b0.h"/** * @addtogroup S3C44B0 *//*@{*//** * This function will enable I-Cache of CPU * */void rt_hw_cpu_icache_enable(){ rt_base_t reg; volatile int i; /* flush cycle */ for(i = 0x10002000; i < 0x10004800; i+=16) { *((int *)i)=0x0; } /* * Init cache * Non-cacheable area (everything outside RAM) * 0x0000:0000 - 0x0C00:0000 */ NCACHBE0 = 0xC0000000; NCACHBE1 = 0x00000000; /* Enable chache */ reg = SYSCFG; reg |= 0x00000006; /* 8kB */ SYSCFG = reg;}/** * This function will disable I-Cache of CPU * */void rt_hw_cpu_icache_disable(){ rt_base_t reg; reg = SYSCFG; reg &= ~0x00000006; /* 8kB */ SYSCFG = reg;}/** * this function will get the status of I-Cache * */rt_base_t rt_hw_cpu_icache_status(){ return 0;}/** * this function will enable D-Cache of CPU * */void rt_hw_cpu_dcache_enable(){ rt_hw_cpu_icache_enable();}/** * this function will disable D-Cache of CPU * */void rt_hw_cpu_dcache_disable(){ rt_hw_cpu_icache_disable();}/** * this function will get the status of D-Cache * */rt_base_t rt_hw_cpu_dcache_status(){ return rt_hw_cpu_icache_status();}/** * this function will reset CPU * */void rt_hw_cpu_reset(){}/** * this function will shutdown CPU * */void rt_hw_cpu_shutdown(){ rt_kprintf("shutdown...\n"); while (1);}/*@}*/
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