ide.h

某个ARM9板子的实际bootloader 对裁剪

/****************************************************************************
* Copyright  Storlink Corp 2005.  All rights reserved.                
*--------------------------------------------------------------------------
* Name			: ide.h
* Description	: Collect IDE definition
*
* History
*
*	Date		Writer		Description
*	-----------	-----------	-------------------------------------------------
*	09/07/2005	Gary Chen	Create
*
****************************************************************************/
#ifndef _IDE_H_
#define _IDE_H_

#if defined(BOARD_SUPPORT_IDE0) && defined(BOARD_SUPPORT_IDE1)
	#define IDE_CONTROLLERS			2
#else
	#define IDE_CONTROLLERS			1
#endif

//#define IDE_CONTROLLERS			2
#define IDE_MAX_DISKS			2 //2 
#define IDE_SECTOR_SIZE 		512
#define IDE_MAX_PARTS_PER_DISK	1//4
#define IDE_MAX_PARTITIONS		IDE_MAX_PARTS_PER_DISK*IDE_CONTROLLERS

#define IDE_CMD_REG8(base,addr)			REG8(base+addr)
#define IDE_CMD_REG16(base,addr)		REG16(base+addr)
#define IDE_CMD_REG32(base,addr)		REG32(base+addr)
#define IDE_CTRL_REG8(base)				REG8(base)

// IDE Register Indices
#define IDE_REG_DATA      0
#define IDE_REG_ERROR     1
#define IDE_REG_FEATURES  1
#define IDE_REG_COUNT     2
#define IDE_REG_REASON    2  // ATAPI
#define IDE_REG_LBALOW    3
#define IDE_REG_LBAMID    4
#define IDE_REG_LBAHI     5
#define IDE_REG_DEVICE    6
#define IDE_REG_STATUS    7
#define IDE_REG_COMMAND   7

#define IDE_STAT_BSY      0x80
#define IDE_STAT_DRDY     0x40
#define IDE_STAT_SERVICE  0x10
#define IDE_STAT_DRQ      0x08
#define IDE_STAT_CORR     0x04
#define IDE_STAT_ERR      0x01

#define IDE_REASON_REL    0x04
#define IDE_REASON_IO     0x02
#define IDE_REASON_COD    0x01

/* flag values */
#define IDE_DEV_PRESENT  1  // Device is present
#define IDE_DEV_PACKET   2  // Supports packet interface
#define IDE_DEV_ADDR48   3  // Supports 48bit addressing

//
// Drive ID offsets of interest
//
#define IDE_DEVID_GENCONFIG      0
#define IDE_DEVID_SERNO         20
#define IDE_DEVID_MODEL         54
#define IDE_DEVID_LBA_CAPACITY 	120
#define IDE_LBA_48				(100*2)
#define IDE_CMD_SET				(83*2)

// Kinds of disks
#define DISK_IDE_HD     		1
#define DISK_IDE_CDROM  		2
#define DISK_FLOPPY     		3

// DOS partition table as laid out in the MBR
//
typedef struct mbr_partition {
	UINT8	boot_ind;		// 0x80 == active
    UINT8	start_head;
    UINT8	start_sector;
    UINT8	start_cyl;
    UINT8	sys_ind;		// partition type
    UINT8	end_head;
    UINT8	end_sector;
    UINT8	end_cyl;
    UINT8	start_sect[4];	// starting sector counting from 0
    UINT8	sector_num[4];	// number of sectors in partition
} IDE_MBR_T;

#define MBR_PTABLE_OFFSET 		0x1be
#define MBR_MAGIC_OFFSET  		0x1fe
#define MBR_MAGIC         		0xaa55

#define IDE_PART_FAT12        	0x01
#define IDE_PART_FAT16_32M    	0x04
#define IDE_PART_EXTENDED     	0x05
#define IDE_PART_FAT16        	0x06
#define IDE_PART_LINUX_MINIX   	0x81
#define IDE_PART_LINUX_SWAP   	0x82
#define IDE_PART_LINUX			0x83
#define IDE_PART_LINUX_EXTENDED	0x85

struct disk_t;
struct ide_t;

typedef int			disk_read_f(struct disk_t *disk, UINT64 start, UINT8 num, UINT16 *buf);
typedef int			disk_write_f(struct disk_t *disk, UINT64 start, UINT8 count, UINT16 *buf);

typedef struct part_t {
	unsigned int	present;
	unsigned int	part_id;			// partition id in disk, 0,1, ...
    struct disk_t	*disk;
    disk_read_f		*read;
    disk_write_f	*write;
    UINT32			start_sector;		// first sector in partition
    UINT64			sector_num;			// number of sectors in partition
    UINT8			os;        			// FAT12, FAT16, Linux, etc.
    UINT8			bootflag;       	// not really used...
} IDE_PART_T;

extern IDE_PART_T	ide_partitions[IDE_MAX_PARTITIONS];
extern int			ide_part_num;

typedef struct disk_t{
	unsigned int	present;
	struct ide_t	*ide;
	disk_read_f		*read;		
    disk_write_f	*write;
	unsigned int	drive_id;
	UINT32			flags;
	int				kind;
	UINT64			sector_num;
	int				part_num;			// partition number per disk
	int				lba_48;
} IDE_DISK_T;

typedef struct ide_t{
	unsigned int	present;
	int				ide_id;
	unsigned int	cmd_base;
	unsigned int	ctrl_base;
	int				disk_num;
	IDE_DISK_T		disk[IDE_MAX_DISKS];
} IDE_INFO_T;

extern IDE_INFO_T	ide_info[IDE_CONTROLLERS];

/*----------------------------------------------------------------------
* ide_get_uint16
*----------------------------------------------------------------------*/
static inline UINT16 ide_get_uint16(char *datap)
{
	return (((*(datap+1)) << 8) + (*(datap)));
}

/*----------------------------------------------------------------------
* ide_get_uint32
*----------------------------------------------------------------------*/
static inline UINT32 ide_get_uint32(char *datap)
{
	return (((*(datap+3)) << 24) + 
			((*(datap+2)) << 16) + 
			((*(datap+1)) << 8) +
			(*(datap+0)));
}

#define SWAB32(x)				\
	((((x) & 0xff) << 24)   |	\
	(((x) & 0xff00) <<  8)	|	\
	(((x) >> 8) & 0xff00)	|	\
	(((x) >> 24) & 0xff))

#define SWAB16(x) \
    ((((x) & 0xFF) << 8) | (((x) >> 8) & 0xFF))

#define	SWAB_LE32(x)	(x)
#define	SWAB_LE16(x)	(x)

#define DISK_READ(d,s,n,p)			((d)->read)((d),(s),(n),(UINT16 *)(p))
#define PARTITION_READ(part,s,n,p)	\
		((part)->read)((part->disk),(s) + (part)->start_sector,(n),(UINT16 *)(p))

#endif // _IDE_H_