cache.c

ARM入门学习源码

#include "44b.h"

#include "Cache.h"



void Cache_Init(void)
{
    rSYSCFG = SYSCFG_8KB;  //Write buffer enable; 8KB Cache;
    rNCACHBE0 = ( 0x02000000 >> 12 ) | ( (0x0C000000 >> 12 ) << 16 );//禁止 0x02000000 ~ 0x0BFFFFFF 进入cache
}


//禁止0000000到02000000地址的数据进入CACHE
void Disable_Cache_Flash(void)
{
    rNCACHBE1 = ( 0x00000000 >> 12 ) | ( (0x02000000 >> 12 ) << 16 );    
}

//允许0000000到02000000地址的数据进入CACHE
void Enable_Cache_Flash(void)
{
    rNCACHBE1 = 0x00000000;
}


void Enable_Cache(void)
{
   	rSYSCFG = rSYSCFG | 0x06;
}


void Disable_Cache(void)
{
	rSYSCFG = rSYSCFG & (~0x06);
}

void Enable_WriteBuf(void)
{
   	rSYSCFG = rSYSCFG | 0x08;
}


void Disable_WriteBuf(void)
{
	rSYSCFG = rSYSCFG & (~0x08);
}