mmu.h

来自「SMDK2440 boot code, base on vivi」· C头文件 代码 · 共 57 行

/*
 * History
 *
 * 2002-01-26: Janghoon Lyu <[e-mail]>
 *    - Initial code
 */

#ifndef _VIVI_MMU_H_
#define _VIVI_MMU_H_

/* 
 * MMU Level 1 Page Table Constants
 * Section descriptor 
 */ 
#define MMU_FULL_ACCESS		(3 << 10)	/* access permission bits */
#define MMU_DOMAIN		(0 << 5)	/* domain control bits */
#define MMU_SPECIAL		(1 << 4)	/* must be 1 */
#define MMU_CACHEABLE		(1 << 3)	/* cacheable */
#define MMU_BUFFERABLE		(1 << 2)	/* bufferable */
#define MMU_SECTION		(2) /* indicates that this is a section descriptor */
#define MMU_SECDESC		(MMU_FULL_ACCESS | MMU_DOMAIN | \
				 MMU_SPECIAL | MMU_SECTION)
#define MMU_SECTION_SIZE	0x00100000

void cache_clean_invalidate(void);
void tlb_invalidate(void);
void mmu_init(void);
void mem_map_init(int);

/* FIXME: Nandy can't determine a proper location for below definitions. */
enum {
	BOOT_TYPE_UNKNOWN = 0,
	BOOT_TYPE_RAM,		/* Booting from (system) RAM */
	BOOT_TYPE_NOR,		/* Booting from NOR flash memory */
	BOOT_TYPE_S3C2410,	/* Booting from NAND flash memory */
	BOOT_TYPE_MDOCP,	/* Booting from Mobile DiskOnChip */
	BOOT_TYPE_S3C24XX,
};

#ifdef CONFIG_BOOT_TYPE_RAM
# define DEFAULT_BOOT_TYPE	BOOT_TYPE_RAM
#elif defined(CONFIG_BOOT_TYPE_NOR)
# define DEFAULT_BOOT_TYPE	BOOT_TYPE_NOR
#elif defined(CONFIG_BOOT_TYPE_S3C2410)
# define DEFAULT_BOOT_TYPE	BOOT_TYPE_S3C2410
#elif defined(CONFIG_BOOT_TYPE_MDOCP)
# define DEFAULT_BOOT_TYPE	BOOT_TYPE_MDOCP
#elif defined(CONFIG_BOOT_TYPE_S3C24XX)
# define DEFAULT_BOOT_TYPE	BOOT_TYPE_S3C24XX
#else
# define DEFAULT_BOOT_TYPE	BOOT_TYPE_UNKNOWN
#endif



#endif /* _VIVI_MMU_H_ */