kernel.c

来自「cache test for arm920 core」· C语言 代码 · 共 50 行

//**********************************************************************
//                                                                      
// Filename: mmutest.c
//                                                                      
// Description: C program to test the MMU.
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
// Copyright(c) Cirrus Logic Corporation 2001, All Rights Reserved                       
//                                                                      
//**********************************************************************
#include <stdio.h>
#include "vs_types.h"
#include "driver_api.h"
#include "regs_gpio.h"
#include "syscon.h"

extern void MMUSetup(void);
extern void GetDirty(void);
extern void FlushDCache(void);

int main()
{
    cSyscon SysCon;
    
    SysconInit(&SysCon);
    
    //
    // Set the bus up at 200/100/50
    //
    SysCon.SetBusClocks(CLK_400, FCLK_DIV_2, HCLK_DIV_4, PCLK_DIV_2);

    
    MMUSetup();
    
    gpio->PEDR.Value &= ~0x3;
    gpio->PEDR.Value |= 1;
    
  
    while(1)
    {
        FlushDCache();
        gpio->PEDR.Value = (gpio->PEDR.Value ^ 0x3);
        GetDirty();
    }        
}