mmu.h

来自「2440 开发板的测试程序。包括uart,iic,lcd」· C头文件 代码 · 共 47 行

/************************************************ 
  NAME    : MMU.H
  DESC    :
  Revision: 02.28.2002 ver 0.0
 ************************************************/

#include "2440slib.h"

#ifndef __MMU_H__
#define __MMU_H__
#ifdef __cplusplus
extern "C"
{
#endif

#define DESC_SEC	(0x2|(1<<4))
#define CB		(3<<2)  //cache_on, write_back
#define CNB		(2<<2)  //cache_on, write_through 
#define NCB 			(1<<2)  //cache_off,WR_BUF on
#define NCNB		(0<<2)  //cache_off,WR_BUF off
#define AP_RW		(3<<10) //supervisor=RW, user=RW
#define AP_RO		(2<<10) //supervisor=RW, user=RO

#define DOMAIN_FAULT	(0x0)
#define DOMAIN_CHK	(0x1) 
#define DOMAIN_NOTCHK	(0x3) 
#define DOMAIN0		(0x0<<5)
#define DOMAIN1		(0x1<<5)

#define DOMAIN0_ATTR	(DOMAIN_CHK<<0) 
#define DOMAIN1_ATTR	(DOMAIN_FAULT<<2) 

#define RW_CB		(AP_RW|DOMAIN0|CB|DESC_SEC)
#define RW_CNB		(AP_RW|DOMAIN0|CNB|DESC_SEC)
#define RW_NCNB		(AP_RW|DOMAIN0|NCNB|DESC_SEC)
#define RW_FAULT	(AP_RW|DOMAIN1|NCNB|DESC_SEC)

	void MMU_Init( void );
	void MMU_SetMTT( int vaddrStart , int vaddrEnd , int paddrStart , int attr );
	void ChangeRomCacheStatus( int attr );

#ifdef __cplusplus
}
#endif

#endif /*__MMU_H__*/