[u-boot.git] / disk / part_dos.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2001
 * Raymond Lo, [email protected]
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 */

/*
 * Support for harddisk partitions.
 *
 * To be compatible with LinuxPPC and Apple we use the standard Apple
 * SCSI disk partitioning scheme. For more information see:
 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
 */

#include <common.h>
#include <command.h>
#include <ide.h>
#include <memalign.h>
#include "part_dos.h"

#ifdef CONFIG_HAVE_BLOCK_DEVICE

#define DOS_PART_DEFAULT_SECTOR 512

/* should this be configurable? It looks like it's not very common at all
 * to use large numbers of partitions */
#define MAX_EXT_PARTS 256

/* Convert char[4] in little endian format to the host format integer
 */
static inline unsigned int le32_to_int(unsigned char *le32)
{
    return ((le32[3] << 24) +
	    (le32[2] << 16) +
	    (le32[1] << 8) +
	     le32[0]
	   );
}

static inline int is_extended(int part_type)
{
    return (part_type == 0x5 ||
	    part_type == 0xf ||
	    part_type == 0x85);
}

static inline int is_bootable(dos_partition_t *p)
{
	return (p->sys_ind == 0xef) || (p->boot_ind == 0x80);
}

static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
			   int part_num, unsigned int disksig)
{
	lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
	lbaint_t lba_size  = le32_to_int (p->size4);

	printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
		"u\t%08x-%02x\t%02x%s%s\n",
		part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
		(is_extended(p->sys_ind) ? " Extd" : ""),
		(is_bootable(p) ? " Boot" : ""));
}

static int test_block_type(unsigned char *buffer)
{
	int slot;
	struct dos_partition *p;
	int part_count = 0;

	if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
	    (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
		return (-1);
	} /* no DOS Signature at all */
	p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET];

	/* Check that the boot indicators are valid and count the partitions. */
	for (slot = 0; slot < 4; ++slot, ++p) {
		if (p->boot_ind != 0 && p->boot_ind != 0x80)
			break;
		if (p->sys_ind)
			++part_count;
	}

	/*
	 * If the partition table is invalid or empty,
	 * check if this is a DOS PBR
	 */
	if (slot != 4 || !part_count) {
		if (!strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
			     "FAT", 3) ||
		    !strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
			     "FAT32", 5))
			return DOS_PBR; /* This is a DOS PBR and not an MBR */
	}
	if (slot == 4)
		return DOS_MBR;	/* This is an DOS MBR */

	/* This is neither a DOS MBR nor a DOS PBR */
	return -1;
}

static int part_test_dos(struct blk_desc *dev_desc)
{
#ifndef CONFIG_SPL_BUILD
	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr,
			DIV_ROUND_UP(dev_desc->blksz, sizeof(legacy_mbr)));

	if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
		return -1;

	if (test_block_type((unsigned char *)mbr) != DOS_MBR)
		return -1;

	if (dev_desc->sig_type == SIG_TYPE_NONE &&
	    mbr->unique_mbr_signature != 0) {
		dev_desc->sig_type = SIG_TYPE_MBR;
		dev_desc->mbr_sig = mbr->unique_mbr_signature;
	}
#else
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);

	if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
		return -1;

	if (test_block_type(buffer) != DOS_MBR)
		return -1;
#endif

	return 0;
}

/*  Print a partition that is relative to its Extended partition table
 */
static void print_partition_extended(struct blk_desc *dev_desc,
				     lbaint_t ext_part_sector,
				     lbaint_t relative,
				     int part_num, unsigned int disksig)
{
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	dos_partition_t *pt;
	int i;

	/* set a maximum recursion level */
	if (part_num > MAX_EXT_PARTS)
	{
		printf("** Nested DOS partitions detected, stopping **\n");
		return;
    }

	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
		printf ("** Can't read partition table on %d:" LBAFU " **\n",
			dev_desc->devnum, ext_part_sector);
		return;
	}
	i=test_block_type(buffer);
	if (i != DOS_MBR) {
		printf ("bad MBR sector signature 0x%02x%02x\n",
			buffer[DOS_PART_MAGIC_OFFSET],
			buffer[DOS_PART_MAGIC_OFFSET + 1]);
		return;
	}

	if (!ext_part_sector)
		disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);

	/* Print all primary/logical partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		/*
		 * fdisk does not show the extended partitions that
		 * are not in the MBR
		 */

		if ((pt->sys_ind != 0) &&
		    (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
			print_one_part(pt, ext_part_sector, part_num, disksig);
		}

		/* Reverse engr the fdisk part# assignment rule! */
		if ((ext_part_sector == 0) ||
		    (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
			part_num++;
		}
	}

	/* Follows the extended partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		if (is_extended (pt->sys_ind)) {
			lbaint_t lba_start
				= le32_to_int (pt->start4) + relative;

			print_partition_extended(dev_desc, lba_start,
				ext_part_sector == 0  ? lba_start : relative,
				part_num, disksig);
		}
	}

	return;
}


/*  Print a partition that is relative to its Extended partition table
 */
static int part_get_info_extended(struct blk_desc *dev_desc,
				  lbaint_t ext_part_sector, lbaint_t relative,
				  int part_num, int which_part,
				  disk_partition_t *info, unsigned int disksig)
{
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	dos_partition_t *pt;
	int i;
	int dos_type;

	/* set a maximum recursion level */
	if (part_num > MAX_EXT_PARTS)
	{
		printf("** Nested DOS partitions detected, stopping **\n");
		return -1;
    }

	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
		printf ("** Can't read partition table on %d:" LBAFU " **\n",
			dev_desc->devnum, ext_part_sector);
		return -1;
	}
	if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
		buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
		printf ("bad MBR sector signature 0x%02x%02x\n",
			buffer[DOS_PART_MAGIC_OFFSET],
			buffer[DOS_PART_MAGIC_OFFSET + 1]);
		return -1;
	}

#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
	if (!ext_part_sector)
		disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
#endif

	/* Print all primary/logical partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		/*
		 * fdisk does not show the extended partitions that
		 * are not in the MBR
		 */
		if (((pt->boot_ind & ~0x80) == 0) &&
		    (pt->sys_ind != 0) &&
		    (part_num == which_part) &&
		    (ext_part_sector == 0 || is_extended(pt->sys_ind) == 0)) {
			info->blksz = DOS_PART_DEFAULT_SECTOR;
			info->start = (lbaint_t)(ext_part_sector +
					le32_to_int(pt->start4));
			info->size  = (lbaint_t)le32_to_int(pt->size4);
			part_set_generic_name(dev_desc, part_num,
					      (char *)info->name);
			/* sprintf(info->type, "%d, pt->sys_ind); */
			strcpy((char *)info->type, "U-Boot");
			info->bootable = is_bootable(pt);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
			sprintf(info->uuid, "%08x-%02x", disksig, part_num);
#endif
			info->sys_ind = pt->sys_ind;
			return 0;
		}

		/* Reverse engr the fdisk part# assignment rule! */
		if ((ext_part_sector == 0) ||
		    (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
			part_num++;
		}
	}

	/* Follows the extended partitions */
	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	for (i = 0; i < 4; i++, pt++) {
		if (is_extended (pt->sys_ind)) {
			lbaint_t lba_start
				= le32_to_int (pt->start4) + relative;

			return part_get_info_extended(dev_desc, lba_start,
				 ext_part_sector == 0 ? lba_start : relative,
				 part_num, which_part, info, disksig);
		}
	}

	/* Check for DOS PBR if no partition is found */
	dos_type = test_block_type(buffer);

	if (dos_type == DOS_PBR) {
		info->start = 0;
		info->size = dev_desc->lba;
		info->blksz = DOS_PART_DEFAULT_SECTOR;
		info->bootable = 0;
		strcpy((char *)info->type, "U-Boot");
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
		info->uuid[0] = 0;
#endif
		return 0;
	}

	return -1;
}

void part_print_dos(struct blk_desc *dev_desc)
{
	printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
	print_partition_extended(dev_desc, 0, 0, 1, 0);
}

int part_get_info_dos(struct blk_desc *dev_desc, int part,
		      disk_partition_t *info)
{
	return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
}

int is_valid_dos_buf(void *buf)
{
	return test_block_type(buf) == DOS_MBR ? 0 : -1;
}

int write_mbr_partition(struct blk_desc *dev_desc, void *buf)
{
	if (is_valid_dos_buf(buf))
		return -1;

	/* write MBR */
	if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
		printf("%s: failed writing '%s' (1 blks at 0x0)\n",
		       __func__, "MBR");
		return 1;
	}

	return 0;
}

U_BOOT_PART_TYPE(dos) = {
	.name		= "DOS",
	.part_type	= PART_TYPE_DOS,
	.max_entries	= DOS_ENTRY_NUMBERS,
	.get_info	= part_get_info_ptr(part_get_info_dos),
	.print		= part_print_ptr(part_print_dos),
	.test		= part_test_dos,
};

#endif
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
fe8c2806 WD	2	/*
	3	* (C) Copyright 2001
	4	* Raymond Lo, [email protected]
	5	* Wolfgang Denk, DENX Software Engineering, [email protected].
fe8c2806 WD	6	*/
	7
	8	/*
	9	* Support for harddisk partitions.
	10	*
	11	* To be compatible with LinuxPPC and Apple we use the standard Apple
	12	* SCSI disk partitioning scheme. For more information see:
	13	* http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
	14	*/
	15
	16	#include <common.h>
	17	#include <command.h>
	18	#include <ide.h>
cf92e05c	19	#include <memalign.h>
fe8c2806 WD	20	#include "part_dos.h"
fe8c2806 WD	21
1811a928	22	#ifdef CONFIG_HAVE_BLOCK_DEVICE
fe8c2806	23
4a36be9b DD	24	#define DOS_PART_DEFAULT_SECTOR 512
4a36be9b DD	25
232e2f4f PE	26	/* should this be configurable? It looks like it's not very common at all
	27	* to use large numbers of partitions */
	28	#define MAX_EXT_PARTS 256
	29
fe8c2806 WD	30	/* Convert char[4] in little endian format to the host format integer
fe8c2806 WD	31	*/
d29892ba	32	static inline unsigned int le32_to_int(unsigned char *le32)
fe8c2806 WD	33	{
	34	return ((le32[3] << 24) +
	35	(le32[2] << 16) +
	36	(le32[1] << 8) +
	37	le32[0]
	38	);
	39	}
	40
	41	static inline int is_extended(int part_type)
	42	{
	43	return (part_type == 0x5 \|\|
	44	part_type == 0xf \|\|
	45	part_type == 0x85);
	46	}
	47
40e0e568 RH	48	static inline int is_bootable(dos_partition_t *p)
40e0e568 RH	49	{
eefa0a64	50	return (p->sys_ind == 0xef) \|\| (p->boot_ind == 0x80);
40e0e568 RH	51	}
40e0e568 RH	52
d29892ba	53	static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
e2e9b378	54	int part_num, unsigned int disksig)
fe8c2806	55	{
d29892ba SM	56	lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
d29892ba SM	57	lbaint_t lba_size = le32_to_int (p->size4);
fe8c2806	58
d29892ba SM	59	printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
d29892ba SM	60	"u\t%08x-%02x\t%02x%s%s\n",
e2e9b378	61	part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
40e0e568 RH	62	(is_extended(p->sys_ind) ? " Extd" : ""),
40e0e568 RH	63	(is_bootable(p) ? " Boot" : ""));
fe8c2806 WD	64	}
fe8c2806 WD	65
7205e407 WD	66	static int test_block_type(unsigned char *buffer)
7205e407 WD	67	{
9d956e0f EE	68	int slot;
9d956e0f EE	69	struct dos_partition *p;
34856b0f	70	int part_count = 0;
9d956e0f	71
7205e407 WD	72	if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) \|\|
	73	(buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
	74	return (-1);
	75	} /* no DOS Signature at all */
9d956e0f	76	p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET];
34856b0f HS	77
	78	/* Check that the boot indicators are valid and count the partitions. */
	79	for (slot = 0; slot < 4; ++slot, ++p) {
	80	if (p->boot_ind != 0 && p->boot_ind != 0x80)
	81	break;
	82	if (p->sys_ind)
	83	++part_count;
66c2d73c	84	}
7205e407	85
34856b0f HS	86	/*
	87	* If the partition table is invalid or empty,
	88	* check if this is a DOS PBR
	89	*/
	90	if (slot != 4 \|\| !part_count) {
	91	if (!strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
	92	"FAT", 3) \|\|
	93	!strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
	94	"FAT32", 5))
	95	return DOS_PBR; /* This is a DOS PBR and not an MBR */
	96	}
	97	if (slot == 4)
	98	return DOS_MBR; /* This is an DOS MBR */
	99
	100	/* This is neither a DOS MBR nor a DOS PBR */
	101	return -1;
	102	}
fe8c2806	103
084bf4c2	104	static int part_test_dos(struct blk_desc *dev_desc)
fe8c2806	105	{
3ea05205	106	#ifndef CONFIG_SPL_BUILD
7aed3d38 FA	107	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr,
7aed3d38 FA	108	DIV_ROUND_UP(dev_desc->blksz, sizeof(legacy_mbr)));
fe8c2806	109
ff98cb90	110	if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
d1efb644 SW	111	return -1;
d1efb644 SW	112
ff98cb90	113	if (test_block_type((unsigned char *)mbr) != DOS_MBR)
d1efb644 SW	114	return -1;
d1efb644 SW	115
ff98cb90 PJ	116	if (dev_desc->sig_type == SIG_TYPE_NONE &&
	117	mbr->unique_mbr_signature != 0) {
	118	dev_desc->sig_type = SIG_TYPE_MBR;
	119	dev_desc->mbr_sig = mbr->unique_mbr_signature;
	120	}
3ea05205 FE	121	#else
	122	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
	123
	124	if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
	125	return -1;
	126
	127	if (test_block_type(buffer) != DOS_MBR)
	128	return -1;
	129	#endif
ff98cb90	130
d1efb644	131	return 0;
fe8c2806 WD	132	}
	133
	134	/* Print a partition that is relative to its Extended partition table
	135	*/
4101f687	136	static void print_partition_extended(struct blk_desc *dev_desc,
d29892ba SM	137	lbaint_t ext_part_sector,
d29892ba SM	138	lbaint_t relative,
e2e9b378	139	int part_num, unsigned int disksig)
fe8c2806	140	{
dec049d9	141	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
fe8c2806 WD	142	dos_partition_t *pt;
	143	int i;
	144
232e2f4f PE	145	/* set a maximum recursion level */
	146	if (part_num > MAX_EXT_PARTS)
	147	{
	148	printf(" Nested DOS partitions detected, stopping \n");
	149	return;
	150	}
	151
2a981dc2	152	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
d29892ba	153	printf (" Can't read partition table on %d:" LBAFU " \n",
bcce53d0	154	dev_desc->devnum, ext_part_sector);
fe8c2806 WD	155	return;
fe8c2806 WD	156	}
7205e407	157	i=test_block_type(buffer);
d1efb644	158	if (i != DOS_MBR) {
fe8c2806 WD	159	printf ("bad MBR sector signature 0x%02x%02x\n",
	160	buffer[DOS_PART_MAGIC_OFFSET],
	161	buffer[DOS_PART_MAGIC_OFFSET + 1]);
	162	return;
	163	}
d1efb644	164
e2e9b378 SW	165	if (!ext_part_sector)
	166	disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
	167
fe8c2806 WD	168	/* Print all primary/logical partitions */
	169	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	170	for (i = 0; i < 4; i++, pt++) {
	171	/*
8bde7f77	172	* fdisk does not show the extended partitions that
fe8c2806 WD	173	* are not in the MBR
	174	*/
	175
	176	if ((pt->sys_ind != 0) &&
	177	(ext_part_sector == 0 \|\| !is_extended (pt->sys_ind)) ) {
e2e9b378	178	print_one_part(pt, ext_part_sector, part_num, disksig);
fe8c2806 WD	179	}
	180
	181	/* Reverse engr the fdisk part# assignment rule! */
	182	if ((ext_part_sector == 0) \|\|
	183	(pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
	184	part_num++;
	185	}
	186	}
	187
	188	/* Follows the extended partitions */
	189	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	190	for (i = 0; i < 4; i++, pt++) {
	191	if (is_extended (pt->sys_ind)) {
d29892ba SM	192	lbaint_t lba_start
d29892ba SM	193	= le32_to_int (pt->start4) + relative;
fe8c2806	194
304b5711 SW	195	print_partition_extended(dev_desc, lba_start,
304b5711 SW	196	ext_part_sector == 0 ? lba_start : relative,
e2e9b378	197	part_num, disksig);
fe8c2806 WD	198	}
	199	}
	200
	201	return;
	202	}
	203
	204
	205	/* Print a partition that is relative to its Extended partition table
	206	*/
3e8bd469 SG	207	static int part_get_info_extended(struct blk_desc *dev_desc,
	208	lbaint_t ext_part_sector, lbaint_t relative,
	209	int part_num, int which_part,
	210	disk_partition_t *info, unsigned int disksig)
fe8c2806	211	{
dec049d9	212	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
fe8c2806 WD	213	dos_partition_t *pt;
fe8c2806 WD	214	int i;
4a36be9b	215	int dos_type;
fe8c2806	216
232e2f4f PE	217	/* set a maximum recursion level */
	218	if (part_num > MAX_EXT_PARTS)
	219	{
	220	printf(" Nested DOS partitions detected, stopping \n");
	221	return -1;
	222	}
	223
2a981dc2	224	if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
d29892ba	225	printf (" Can't read partition table on %d:" LBAFU " \n",
bcce53d0	226	dev_desc->devnum, ext_part_sector);
fe8c2806 WD	227	return -1;
	228	}
	229	if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 \|\|
	230	buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
	231	printf ("bad MBR sector signature 0x%02x%02x\n",
	232	buffer[DOS_PART_MAGIC_OFFSET],
	233	buffer[DOS_PART_MAGIC_OFFSET + 1]);
	234	return -1;
	235	}
	236
b331cd62	237	#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
d27b5f93 SW	238	if (!ext_part_sector)
	239	disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
	240	#endif
	241
fe8c2806 WD	242	/* Print all primary/logical partitions */
	243	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	244	for (i = 0; i < 4; i++, pt++) {
	245	/*
8bde7f77 WD	246	* fdisk does not show the extended partitions that
8bde7f77 WD	247	* are not in the MBR
fe8c2806	248	*/
78f4ca79 DM	249	if (((pt->boot_ind & ~0x80) == 0) &&
78f4ca79 DM	250	(pt->sys_ind != 0) &&
7f70e853	251	(part_num == which_part) &&
8f7102cf	252	(ext_part_sector == 0 \|\| is_extended(pt->sys_ind) == 0)) {
4a36be9b	253	info->blksz = DOS_PART_DEFAULT_SECTOR;
e04350d2 SR	254	info->start = (lbaint_t)(ext_part_sector +
	255	le32_to_int(pt->start4));
	256	info->size = (lbaint_t)le32_to_int(pt->size4);
da2ee24d PK	257	part_set_generic_name(dev_desc, part_num,
da2ee24d PK	258	(char *)info->name);
fe8c2806	259	/* sprintf(info->type, "%d, pt->sys_ind); */
192bc694	260	strcpy((char *)info->type, "U-Boot");
40e0e568	261	info->bootable = is_bootable(pt);
b331cd62	262	#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
d27b5f93 SW	263	sprintf(info->uuid, "%08x-%02x", disksig, part_num);
d27b5f93 SW	264	#endif
f0fb4fa7	265	info->sys_ind = pt->sys_ind;
fe8c2806 WD	266	return 0;
	267	}
	268
	269	/* Reverse engr the fdisk part# assignment rule! */
	270	if ((ext_part_sector == 0) \|\|
	271	(pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
	272	part_num++;
	273	}
	274	}
	275
	276	/* Follows the extended partitions */
	277	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
	278	for (i = 0; i < 4; i++, pt++) {
	279	if (is_extended (pt->sys_ind)) {
d29892ba SM	280	lbaint_t lba_start
d29892ba SM	281	= le32_to_int (pt->start4) + relative;
fe8c2806	282
3e8bd469	283	return part_get_info_extended(dev_desc, lba_start,
fe8c2806	284	ext_part_sector == 0 ? lba_start : relative,
d27b5f93	285	part_num, which_part, info, disksig);
fe8c2806 WD	286	}
fe8c2806 WD	287	}
4a36be9b DD	288
	289	/* Check for DOS PBR if no partition is found */
	290	dos_type = test_block_type(buffer);
	291
	292	if (dos_type == DOS_PBR) {
	293	info->start = 0;
	294	info->size = dev_desc->lba;
	295	info->blksz = DOS_PART_DEFAULT_SECTOR;
	296	info->bootable = 0;
192bc694	297	strcpy((char *)info->type, "U-Boot");
b331cd62	298	#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
4a36be9b DD	299	info->uuid[0] = 0;
	300	#endif
	301	return 0;
	302	}
	303
fe8c2806 WD	304	return -1;
	305	}
	306
084bf4c2	307	void part_print_dos(struct blk_desc *dev_desc)
fe8c2806	308	{
e2e9b378 SW	309	printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
e2e9b378 SW	310	print_partition_extended(dev_desc, 0, 0, 1, 0);
fe8c2806 WD	311	}
fe8c2806 WD	312
3e8bd469 SG	313	int part_get_info_dos(struct blk_desc *dev_desc, int part,
3e8bd469 SG	314	disk_partition_t *info)
fe8c2806	315	{
3e8bd469	316	return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
fe8c2806 WD	317	}
fe8c2806 WD	318
b6dd69a4 PK	319	int is_valid_dos_buf(void *buf)
	320	{
	321	return test_block_type(buf) == DOS_MBR ? 0 : -1;
	322	}
	323
	324	int write_mbr_partition(struct blk_desc dev_desc, void buf)
	325	{
	326	if (is_valid_dos_buf(buf))
	327	return -1;
	328
	329	/* write MBR */
	330	if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
	331	printf("%s: failed writing '%s' (1 blks at 0x0)\n",
	332	__func__, "MBR");
	333	return 1;
	334	}
	335
	336	return 0;
	337	}
	338
96e5b03c SG	339	U_BOOT_PART_TYPE(dos) = {
	340	.name = "DOS",
	341	.part_type = PART_TYPE_DOS,
87b8530f	342	.max_entries = DOS_ENTRY_NUMBERS,
3e8bd469	343	.get_info = part_get_info_ptr(part_get_info_dos),
084bf4c2 SG	344	.print = part_print_ptr(part_print_dos),
084bf4c2 SG	345	.test = part_test_dos,
96e5b03c	346	};
fe8c2806	347
cde5c64d	348	#endif