disk/part_efi.c - platform/external/u-boot - Gitiles

 /*
  * Copyright (C) 2008 RuggedCom, Inc.
  * Richard Retanubun <RichardRetanubun@RuggedCom.com>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 /*
  * Problems with CONFIG_SYS_64BIT_LBA:
  *
  * struct disk_partition.start in include/part.h is sized as ulong.
  * When CONFIG_SYS_64BIT_LBA is activated, lbaint_t changes from ulong to uint64_t.
  * For now, it is cast back to ulong at assignment.
  *
  * This limits the maximum size of addressable storage to < 2 Terra Bytes
  */
 #include <common.h>
 #include <command.h>
 #include <ide.h>
 #include <malloc.h>
 #include "part_efi.h"
 #include <linux/ctype.h>

 #if defined(CONFIG_CMD_IDE) || \
     defined(CONFIG_CMD_SATA) || \
     defined(CONFIG_CMD_SCSI) || \
     defined(CONFIG_CMD_USB) || \
     defined(CONFIG_MMC) || \
     defined(CONFIG_SYSTEMACE)

 /* Convert char[2] in little endian format to the host format integer
  */
 static inline unsigned short le16_to_int(unsigned char *le16)
 {
 	return ((le16[1] << 8) + le16[0]);
 }

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

 /* Convert char[8] in little endian format to the host format integer
  */
 static inline unsigned long long le64_to_int(unsigned char *le64)
 {
 	return (((unsigned long long)le64[7] << 56) +
 		((unsigned long long)le64[6] << 48) +
 		((unsigned long long)le64[5] << 40) +
 		((unsigned long long)le64[4] << 32) +
 		((unsigned long long)le64[3] << 24) +
 		((unsigned long long)le64[2] << 16) +
 		((unsigned long long)le64[1] << 8) +
 		(unsigned long long)le64[0]);
 }

 /**
  * efi_crc32() - EFI version of crc32 function
  * @buf: buffer to calculate crc32 of
  * @len - length of buf
  *
  * Description: Returns EFI-style CRC32 value for @buf
  */
 static inline unsigned long efi_crc32(const void *buf, unsigned long len)
 {
 	return crc32(0, buf, len);
 }

 /*
  * Private function prototypes
  */

 static int pmbr_part_valid(struct partition *part);
 static int is_pmbr_valid(legacy_mbr * mbr);

 static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
 				gpt_header * pgpt_head, gpt_entry ** pgpt_pte);

 static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc,
 				gpt_header * pgpt_head);

 static int is_pte_valid(gpt_entry * pte);

 static char *print_efiname(gpt_entry *pte)
 {
 	static char name[PARTNAME_SZ + 1];
 	int i;
 	for (i = 0; i < PARTNAME_SZ; i++) {
 		u8 c;
 		c = pte->partition_name[i] & 0xff;
 		c = (c && !isprint(c)) ? '.' : c;
 		name[i] = c;
 	}
 	name[PARTNAME_SZ] = 0;
 	return name;
 }

 static void uuid_string(unsigned char *uuid, char *str)
 {
 	static const u8 le[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11,
 				  12, 13, 14, 15};
 	int i;

 	for (i = 0; i < 16; i++) {
 		sprintf(str, "%02x", uuid[le[i]]);
 		str += 2;
 		switch (i) {
 		case 3:
 		case 5:
 		case 7:
 		case 9:
 			*str++ = '-';
 			break;
 		}
 	}
 }

 static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;

 static inline int is_bootable(gpt_entry *p)
 {
 	return p->attributes.fields.legacy_bios_bootable ||
 		!memcmp(&(p->partition_type_guid), &system_guid,
 			sizeof(efi_guid_t));
 }

 /*
  * Public Functions (include/part.h)
  */

 void print_part_efi(block_dev_desc_t * dev_desc)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
 	gpt_entry *gpt_pte = NULL;
 	int i = 0;
 	char uuid[37];

 	if (!dev_desc) {
 		printf("%s: Invalid Argument(s)\n", __func__);
 		return;
 	}
 	/* This function validates AND fills in the GPT header and PTE */
 	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
 			 gpt_head, &gpt_pte) != 1) {
 		printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
 		return;
 	}

 	debug("%s: gpt-entry at %p\n", __func__, gpt_pte);

 	printf("Part\tStart LBA\tEnd LBA\t\tName\n");
 	printf("\tAttributes\n");
 	printf("\tType UUID\n");
 	printf("\tPartition UUID\n");

 	for (i = 0; i < le32_to_int(gpt_head->num_partition_entries); i++) {
 		/* Stop at the first non valid PTE */
 		if (!is_pte_valid(&gpt_pte[i]))
 			break;

 		printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
 			le64_to_int(gpt_pte[i].starting_lba),
 			le64_to_int(gpt_pte[i].ending_lba),
 			print_efiname(&gpt_pte[i]));
 		printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
 		uuid_string(gpt_pte[i].partition_type_guid.b, uuid);
 		printf("\ttype:\t%s\n", uuid);
 		uuid_string(gpt_pte[i].unique_partition_guid.b, uuid);
 		printf("\tuuid:\t%s\n", uuid);
 	}

 	/* Remember to free pte */
 	free(gpt_pte);
 	return;
 }

 int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
 				disk_partition_t * info)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
 	gpt_entry *gpt_pte = NULL;

 	/* "part" argument must be at least 1 */
 	if (!dev_desc || !info || part < 1) {
 		printf("%s: Invalid Argument(s)\n", __func__);
 		return -1;
 	}

 	/* This function validates AND fills in the GPT header and PTE */
 	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
 			gpt_head, &gpt_pte) != 1) {
 		printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
 		return -1;
 	}

 	if (part > le32_to_int(gpt_head->num_partition_entries) ||
 	    !is_pte_valid(&gpt_pte[part - 1])) {
 		printf("%s: *** ERROR: Invalid partition number %d ***\n",
 			__func__, part);
 		return -1;
 	}

 	/* The ulong casting limits the maximum disk size to 2 TB */
 	info->start = (ulong) le64_to_int(gpt_pte[part - 1].starting_lba);
 	/* The ending LBA is inclusive, to calculate size, add 1 to it */
 	info->size = ((ulong)le64_to_int(gpt_pte[part - 1].ending_lba) + 1)
 		     - info->start;
 	info->blksz = GPT_BLOCK_SIZE;

 	sprintf((char *)info->name, "%s",
 			print_efiname(&gpt_pte[part - 1]));
 	sprintf((char *)info->type, "U-Boot");
 	info->bootable = is_bootable(&gpt_pte[part - 1]);
 #ifdef CONFIG_PARTITION_UUIDS
 	uuid_string(gpt_pte[part - 1].unique_partition_guid.b, info->uuid);
 #endif

 	debug("%s: start 0x%lX, size 0x%lX, name %s", __func__,
 		info->start, info->size, info->name);

 	/* Remember to free pte */
 	free(gpt_pte);
 	return 0;
 }

 int test_part_efi(block_dev_desc_t * dev_desc)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, legacymbr, 1);

 	/* Read legacy MBR from block 0 and validate it */
 	if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)legacymbr) != 1)
 		|| (is_pmbr_valid(legacymbr) != 1)) {
 		return -1;
 	}
 	return 0;
 }

 /*
  * Private functions
  */
 /*
  * pmbr_part_valid(): Check for EFI partition signature
  *
  * Returns: 1 if EFI GPT partition type is found.
  */
 static int pmbr_part_valid(struct partition *part)
 {
 	if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
 		le32_to_int(part->start_sect) == 1UL) {
 		return 1;
 	}

 	return 0;
 }

 /*
  * is_pmbr_valid(): test Protective MBR for validity
  *
  * Returns: 1 if PMBR is valid, 0 otherwise.
  * Validity depends on two things:
  *  1) MSDOS signature is in the last two bytes of the MBR
  *  2) One partition of type 0xEE is found, checked by pmbr_part_valid()
  */
 static int is_pmbr_valid(legacy_mbr * mbr)
 {
 	int i = 0;

 	if (!mbr || le16_to_int(mbr->signature) != MSDOS_MBR_SIGNATURE) {
 		return 0;
 	}

 	for (i = 0; i < 4; i++) {
 		if (pmbr_part_valid(&mbr->partition_record[i])) {
 			return 1;
 		}
 	}
 	return 0;
 }

 /**
  * is_gpt_valid() - tests one GPT header and PTEs for validity
  *
  * lba is the logical block address of the GPT header to test
  * gpt is a GPT header ptr, filled on return.
  * ptes is a PTEs ptr, filled on return.
  *
  * Description: returns 1 if valid,  0 on error.
  * If valid, returns pointers to PTEs.
  */
 static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
 			gpt_header * pgpt_head, gpt_entry ** pgpt_pte)
 {
 	unsigned char crc32_backup[4] = { 0 };
 	unsigned long calc_crc32;
 	unsigned long long lastlba;

 	if (!dev_desc || !pgpt_head) {
 		printf("%s: Invalid Argument(s)\n", __func__);
 		return 0;
 	}

 	/* Read GPT Header from device */
 	if (dev_desc->block_read(dev_desc->dev, lba, 1, pgpt_head) != 1) {
 		printf("*** ERROR: Can't read GPT header ***\n");
 		return 0;
 	}

 	/* Check the GPT header signature */
 	if (le64_to_int(pgpt_head->signature) != GPT_HEADER_SIGNATURE) {
 		printf("GUID Partition Table Header signature is wrong:"
 			"0x%llX != 0x%llX\n",
 			(unsigned long long)le64_to_int(pgpt_head->signature),
 			(unsigned long long)GPT_HEADER_SIGNATURE);
 		return 0;
 	}

 	/* Check the GUID Partition Table CRC */
 	memcpy(crc32_backup, pgpt_head->header_crc32, sizeof(crc32_backup));
 	memset(pgpt_head->header_crc32, 0, sizeof(pgpt_head->header_crc32));

 	calc_crc32 = efi_crc32((const unsigned char *)pgpt_head,
 		le32_to_int(pgpt_head->header_size));

 	memcpy(pgpt_head->header_crc32, crc32_backup, sizeof(crc32_backup));

 	if (calc_crc32 != le32_to_int(crc32_backup)) {
 		printf("GUID Partition Table Header CRC is wrong:"
 			"0x%08lX != 0x%08lX\n",
 			le32_to_int(crc32_backup), calc_crc32);
 		return 0;
 	}

 	/* Check that the my_lba entry points to the LBA that contains the GPT */
 	if (le64_to_int(pgpt_head->my_lba) != lba) {
 		printf("GPT: my_lba incorrect: %llX != %llX\n",
 			(unsigned long long)le64_to_int(pgpt_head->my_lba),
 			(unsigned long long)lba);
 		return 0;
 	}

 	/* Check the first_usable_lba and last_usable_lba are within the disk. */
 	lastlba = (unsigned long long)dev_desc->lba;
 	if (le64_to_int(pgpt_head->first_usable_lba) > lastlba) {
 		printf("GPT: first_usable_lba incorrect: %llX > %llX\n",
 			le64_to_int(pgpt_head->first_usable_lba), lastlba);
 		return 0;
 	}
 	if (le64_to_int(pgpt_head->last_usable_lba) > lastlba) {
 		printf("GPT: last_usable_lba incorrect: %llX > %llX\n",
 			le64_to_int(pgpt_head->last_usable_lba), lastlba);
 		return 0;
 	}

 	debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n",
 		le64_to_int(pgpt_head->first_usable_lba),
 		le64_to_int(pgpt_head->last_usable_lba), lastlba);

 	/* Read and allocate Partition Table Entries */
 	*pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
 	if (*pgpt_pte == NULL) {
 		printf("GPT: Failed to allocate memory for PTE\n");
 		return 0;
 	}

 	/* Check the GUID Partition Table Entry Array CRC */
 	calc_crc32 = efi_crc32((const unsigned char *)*pgpt_pte,
 		le32_to_int(pgpt_head->num_partition_entries) *
 		le32_to_int(pgpt_head->sizeof_partition_entry));

 	if (calc_crc32 != le32_to_int(pgpt_head->partition_entry_array_crc32)) {
 		printf("GUID Partition Table Entry Array CRC is wrong:"
 			"0x%08lX != 0x%08lX\n",
 			le32_to_int(pgpt_head->partition_entry_array_crc32),
 			calc_crc32);

 		free(*pgpt_pte);
 		return 0;
 	}

 	/* We're done, all's well */
 	return 1;
 }

 /**
  * alloc_read_gpt_entries(): reads partition entries from disk
  * @dev_desc
  * @gpt - GPT header
  *
  * Description: Returns ptes on success,  NULL on error.
  * Allocates space for PTEs based on information found in @gpt.
  * Notes: remember to free pte when you're done!
  */
 static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc,
 					 gpt_header * pgpt_head)
 {
 	size_t count = 0;
 	gpt_entry *pte = NULL;

 	if (!dev_desc || !pgpt_head) {
 		printf("%s: Invalid Argument(s)\n", __func__);
 		return NULL;
 	}

 	count = le32_to_int(pgpt_head->num_partition_entries) *
 		le32_to_int(pgpt_head->sizeof_partition_entry);

 	debug("%s: count = %lu * %lu = %zu\n", __func__,
 		le32_to_int(pgpt_head->num_partition_entries),
 		le32_to_int(pgpt_head->sizeof_partition_entry), count);

 	/* Allocate memory for PTE, remember to FREE */
 	if (count != 0) {
 		pte = memalign(ARCH_DMA_MINALIGN, count);
 	}

 	if (count == 0 || pte == NULL) {
 		printf("%s: ERROR: Can't allocate 0x%zX "
 		       "bytes for GPT Entries\n",
 			__func__, count);
 		return NULL;
 	}

 	/* Read GPT Entries from device */
 	if (dev_desc->block_read (dev_desc->dev,
 		(unsigned long)le64_to_int(pgpt_head->partition_entry_lba),
 		(lbaint_t) (count / GPT_BLOCK_SIZE), pte)
 		!= (count / GPT_BLOCK_SIZE)) {

 		printf("*** ERROR: Can't read GPT Entries ***\n");
 		free(pte);
 		return NULL;
 	}
 	return pte;
 }

 /**
  * is_pte_valid(): validates a single Partition Table Entry
  * @gpt_entry - Pointer to a single Partition Table Entry
  *
  * Description: returns 1 if valid,  0 on error.
  */
 static int is_pte_valid(gpt_entry * pte)
 {
 	efi_guid_t unused_guid;

 	if (!pte) {
 		printf("%s: Invalid Argument(s)\n", __func__);
 		return 0;
 	}

 	/* Only one validation for now:
 	 * The GUID Partition Type != Unused Entry (ALL-ZERO)
 	 */
 	memset(unused_guid.b, 0, sizeof(unused_guid.b));

 	if (memcmp(pte->partition_type_guid.b, unused_guid.b,
 		sizeof(unused_guid.b)) == 0) {

 		debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
 		      (unsigned int)(uintptr_t)pte);

 		return 0;
 	} else {
 		return 1;
 	}
 }
 #endif
	/*
	* Copyright (C) 2008 RuggedCom, Inc.
	* Richard Retanubun <RichardRetanubun@RuggedCom.com>
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	/*
	* Problems with CONFIG_SYS_64BIT_LBA:
	*
	* struct disk_partition.start in include/part.h is sized as ulong.
	* When CONFIG_SYS_64BIT_LBA is activated, lbaint_t changes from ulong to uint64_t.
	* For now, it is cast back to ulong at assignment.
	*
	* This limits the maximum size of addressable storage to < 2 Terra Bytes
	*/
	#include <common.h>
	#include <command.h>
	#include <ide.h>
	#include <malloc.h>
	#include "part_efi.h"
	#include <linux/ctype.h>

	#if defined(CONFIG_CMD_IDE) \|\| \
	defined(CONFIG_CMD_SATA) \|\| \
	defined(CONFIG_CMD_SCSI) \|\| \
	defined(CONFIG_CMD_USB) \|\| \
	defined(CONFIG_MMC) \|\| \
	defined(CONFIG_SYSTEMACE)

	/* Convert char[2] in little endian format to the host format integer
	*/
	static inline unsigned short le16_to_int(unsigned char *le16)
	{
	return ((le16[1] << 8) + le16[0]);
	}

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

	/* Convert char[8] in little endian format to the host format integer
	*/
	static inline unsigned long long le64_to_int(unsigned char *le64)
	{
	return (((unsigned long long)le64[7] << 56) +
	((unsigned long long)le64[6] << 48) +
	((unsigned long long)le64[5] << 40) +
	((unsigned long long)le64[4] << 32) +
	((unsigned long long)le64[3] << 24) +
	((unsigned long long)le64[2] << 16) +
	((unsigned long long)le64[1] << 8) +
	(unsigned long long)le64[0]);
	}

	/**
	* efi_crc32() - EFI version of crc32 function
	* @buf: buffer to calculate crc32 of
	* @len - length of buf
	*
	* Description: Returns EFI-style CRC32 value for @buf
	*/
	static inline unsigned long efi_crc32(const void *buf, unsigned long len)
	{
	return crc32(0, buf, len);
	}

	/*
	* Private function prototypes
	*/

	static int pmbr_part_valid(struct partition *part);
	static int is_pmbr_valid(legacy_mbr * mbr);

	static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
	gpt_header * pgpt_head, gpt_entry ** pgpt_pte);

	static gpt_entry alloc_read_gpt_entries(block_dev_desc_t dev_desc,
	gpt_header * pgpt_head);

	static int is_pte_valid(gpt_entry * pte);

	static char print_efiname(gpt_entry pte)
	{
	static char name[PARTNAME_SZ + 1];
	int i;
	for (i = 0; i < PARTNAME_SZ; i++) {
	u8 c;
	c = pte->partition_name[i] & 0xff;
	c = (c && !isprint(c)) ? '.' : c;
	name[i] = c;
	}
	name[PARTNAME_SZ] = 0;
	return name;
	}

	static void uuid_string(unsigned char uuid, char str)
	{
	static const u8 le[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11,
	12, 13, 14, 15};
	int i;

	for (i = 0; i < 16; i++) {
	sprintf(str, "%02x", uuid[le[i]]);
	str += 2;
	switch (i) {
	case 3:
	case 5:
	case 7:
	case 9:
	*str++ = '-';
	break;
	}
	}
	}

	static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;

	static inline int is_bootable(gpt_entry *p)
	{
	return p->attributes.fields.legacy_bios_bootable \|\|
	!memcmp(&(p->partition_type_guid), &system_guid,
	sizeof(efi_guid_t));
	}

	/*
	* Public Functions (include/part.h)
	*/

	void print_part_efi(block_dev_desc_t * dev_desc)
	{
	ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
	gpt_entry *gpt_pte = NULL;
	int i = 0;
	char uuid[37];

	if (!dev_desc) {
	printf("%s: Invalid Argument(s)\n", __func__);
	return;
	}
	/* This function validates AND fills in the GPT header and PTE */
	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
	gpt_head, &gpt_pte) != 1) {
	printf("%s: * ERROR: Invalid GPT *\n", __func__);
	return;
	}

	debug("%s: gpt-entry at %p\n", __func__, gpt_pte);

	printf("Part\tStart LBA\tEnd LBA\t\tName\n");
	printf("\tAttributes\n");
	printf("\tType UUID\n");
	printf("\tPartition UUID\n");

	for (i = 0; i < le32_to_int(gpt_head->num_partition_entries); i++) {
	/* Stop at the first non valid PTE */
	if (!is_pte_valid(&gpt_pte[i]))
	break;

	printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
	le64_to_int(gpt_pte[i].starting_lba),
	le64_to_int(gpt_pte[i].ending_lba),
	print_efiname(&gpt_pte[i]));
	printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
	uuid_string(gpt_pte[i].partition_type_guid.b, uuid);
	printf("\ttype:\t%s\n", uuid);
	uuid_string(gpt_pte[i].unique_partition_guid.b, uuid);
	printf("\tuuid:\t%s\n", uuid);
	}

	/* Remember to free pte */
	free(gpt_pte);
	return;
	}

	int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
	disk_partition_t * info)
	{
	ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
	gpt_entry *gpt_pte = NULL;

	/* "part" argument must be at least 1 */
	if (!dev_desc \|\| !info \|\| part < 1) {
	printf("%s: Invalid Argument(s)\n", __func__);
	return -1;
	}

	/* This function validates AND fills in the GPT header and PTE */
	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
	gpt_head, &gpt_pte) != 1) {
	printf("%s: * ERROR: Invalid GPT *\n", __func__);
	return -1;
	}

	if (part > le32_to_int(gpt_head->num_partition_entries) \|\|
	!is_pte_valid(&gpt_pte[part - 1])) {
	printf("%s: * ERROR: Invalid partition number %d *\n",
	__func__, part);
	return -1;
	}

	/* The ulong casting limits the maximum disk size to 2 TB */
	info->start = (ulong) le64_to_int(gpt_pte[part - 1].starting_lba);
	/* The ending LBA is inclusive, to calculate size, add 1 to it */
	info->size = ((ulong)le64_to_int(gpt_pte[part - 1].ending_lba) + 1)
	- info->start;
	info->blksz = GPT_BLOCK_SIZE;

	sprintf((char *)info->name, "%s",
	print_efiname(&gpt_pte[part - 1]));
	sprintf((char *)info->type, "U-Boot");
	info->bootable = is_bootable(&gpt_pte[part - 1]);
	#ifdef CONFIG_PARTITION_UUIDS
	uuid_string(gpt_pte[part - 1].unique_partition_guid.b, info->uuid);
	#endif

	debug("%s: start 0x%lX, size 0x%lX, name %s", __func__,
	info->start, info->size, info->name);

	/* Remember to free pte */
	free(gpt_pte);
	return 0;
	}

	int test_part_efi(block_dev_desc_t * dev_desc)
	{
	ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, legacymbr, 1);

	/* Read legacy MBR from block 0 and validate it */
	if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)legacymbr) != 1)
	\|\| (is_pmbr_valid(legacymbr) != 1)) {
	return -1;
	}
	return 0;
	}

	/*
	* Private functions
	*/
	/*
	* pmbr_part_valid(): Check for EFI partition signature
	*
	* Returns: 1 if EFI GPT partition type is found.
	*/
	static int pmbr_part_valid(struct partition *part)
	{
	if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
	le32_to_int(part->start_sect) == 1UL) {
	return 1;
	}

	return 0;
	}

	/*
	* is_pmbr_valid(): test Protective MBR for validity
	*
	* Returns: 1 if PMBR is valid, 0 otherwise.
	* Validity depends on two things:
	* 1) MSDOS signature is in the last two bytes of the MBR
	* 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
	*/
	static int is_pmbr_valid(legacy_mbr * mbr)
	{
	int i = 0;

	if (!mbr \|\| le16_to_int(mbr->signature) != MSDOS_MBR_SIGNATURE) {
	return 0;
	}

	for (i = 0; i < 4; i++) {
	if (pmbr_part_valid(&mbr->partition_record[i])) {
	return 1;
	}
	}
	return 0;
	}

	/**
	* is_gpt_valid() - tests one GPT header and PTEs for validity
	*
	* lba is the logical block address of the GPT header to test
	* gpt is a GPT header ptr, filled on return.
	* ptes is a PTEs ptr, filled on return.
	*
	* Description: returns 1 if valid, 0 on error.
	* If valid, returns pointers to PTEs.
	*/
	static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
	gpt_header * pgpt_head, gpt_entry ** pgpt_pte)
	{
	unsigned char crc32_backup[4] = { 0 };
	unsigned long calc_crc32;
	unsigned long long lastlba;

	if (!dev_desc \|\| !pgpt_head) {
	printf("%s: Invalid Argument(s)\n", __func__);
	return 0;
	}

	/* Read GPT Header from device */
	if (dev_desc->block_read(dev_desc->dev, lba, 1, pgpt_head) != 1) {
	printf("* ERROR: Can't read GPT header *\n");
	return 0;
	}

	/* Check the GPT header signature */
	if (le64_to_int(pgpt_head->signature) != GPT_HEADER_SIGNATURE) {
	printf("GUID Partition Table Header signature is wrong:"
	"0x%llX != 0x%llX\n",
	(unsigned long long)le64_to_int(pgpt_head->signature),
	(unsigned long long)GPT_HEADER_SIGNATURE);
	return 0;
	}

	/* Check the GUID Partition Table CRC */
	memcpy(crc32_backup, pgpt_head->header_crc32, sizeof(crc32_backup));
	memset(pgpt_head->header_crc32, 0, sizeof(pgpt_head->header_crc32));

	calc_crc32 = efi_crc32((const unsigned char *)pgpt_head,
	le32_to_int(pgpt_head->header_size));

	memcpy(pgpt_head->header_crc32, crc32_backup, sizeof(crc32_backup));

	if (calc_crc32 != le32_to_int(crc32_backup)) {
	printf("GUID Partition Table Header CRC is wrong:"
	"0x%08lX != 0x%08lX\n",
	le32_to_int(crc32_backup), calc_crc32);
	return 0;
	}

	/* Check that the my_lba entry points to the LBA that contains the GPT */
	if (le64_to_int(pgpt_head->my_lba) != lba) {
	printf("GPT: my_lba incorrect: %llX != %llX\n",
	(unsigned long long)le64_to_int(pgpt_head->my_lba),
	(unsigned long long)lba);
	return 0;
	}

	/* Check the first_usable_lba and last_usable_lba are within the disk. */
	lastlba = (unsigned long long)dev_desc->lba;
	if (le64_to_int(pgpt_head->first_usable_lba) > lastlba) {
	printf("GPT: first_usable_lba incorrect: %llX > %llX\n",
	le64_to_int(pgpt_head->first_usable_lba), lastlba);
	return 0;
	}
	if (le64_to_int(pgpt_head->last_usable_lba) > lastlba) {
	printf("GPT: last_usable_lba incorrect: %llX > %llX\n",
	le64_to_int(pgpt_head->last_usable_lba), lastlba);
	return 0;
	}

	debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n",
	le64_to_int(pgpt_head->first_usable_lba),
	le64_to_int(pgpt_head->last_usable_lba), lastlba);

	/* Read and allocate Partition Table Entries */
	*pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
	if (*pgpt_pte == NULL) {
	printf("GPT: Failed to allocate memory for PTE\n");
	return 0;
	}

	/* Check the GUID Partition Table Entry Array CRC */
	calc_crc32 = efi_crc32((const unsigned char )pgpt_pte,
	le32_to_int(pgpt_head->num_partition_entries) *
	le32_to_int(pgpt_head->sizeof_partition_entry));

	if (calc_crc32 != le32_to_int(pgpt_head->partition_entry_array_crc32)) {
	printf("GUID Partition Table Entry Array CRC is wrong:"
	"0x%08lX != 0x%08lX\n",
	le32_to_int(pgpt_head->partition_entry_array_crc32),
	calc_crc32);

	free(*pgpt_pte);
	return 0;
	}

	/* We're done, all's well */
	return 1;
	}

	/**
	* alloc_read_gpt_entries(): reads partition entries from disk
	* @dev_desc
	* @gpt - GPT header
	*
	* Description: Returns ptes on success, NULL on error.
	* Allocates space for PTEs based on information found in @gpt.
	* Notes: remember to free pte when you're done!
	*/
	static gpt_entry alloc_read_gpt_entries(block_dev_desc_t dev_desc,
	gpt_header * pgpt_head)
	{
	size_t count = 0;
	gpt_entry *pte = NULL;

	if (!dev_desc \|\| !pgpt_head) {
	printf("%s: Invalid Argument(s)\n", __func__);
	return NULL;
	}

	count = le32_to_int(pgpt_head->num_partition_entries) *
	le32_to_int(pgpt_head->sizeof_partition_entry);

	debug("%s: count = %lu * %lu = %zu\n", __func__,
	le32_to_int(pgpt_head->num_partition_entries),
	le32_to_int(pgpt_head->sizeof_partition_entry), count);

	/* Allocate memory for PTE, remember to FREE */
	if (count != 0) {
	pte = memalign(ARCH_DMA_MINALIGN, count);
	}

	if (count == 0 \|\| pte == NULL) {
	printf("%s: ERROR: Can't allocate 0x%zX "
	"bytes for GPT Entries\n",
	__func__, count);
	return NULL;
	}

	/* Read GPT Entries from device */
	if (dev_desc->block_read (dev_desc->dev,
	(unsigned long)le64_to_int(pgpt_head->partition_entry_lba),
	(lbaint_t) (count / GPT_BLOCK_SIZE), pte)
	!= (count / GPT_BLOCK_SIZE)) {

	printf("* ERROR: Can't read GPT Entries *\n");
	free(pte);
	return NULL;
	}
	return pte;
	}

	/**
	* is_pte_valid(): validates a single Partition Table Entry
	* @gpt_entry - Pointer to a single Partition Table Entry
	*
	* Description: returns 1 if valid, 0 on error.
	*/
	static int is_pte_valid(gpt_entry * pte)
	{
	efi_guid_t unused_guid;

	if (!pte) {
	printf("%s: Invalid Argument(s)\n", __func__);
	return 0;
	}

	/* Only one validation for now:
	* The GUID Partition Type != Unused Entry (ALL-ZERO)
	*/
	memset(unused_guid.b, 0, sizeof(unused_guid.b));

	if (memcmp(pte->partition_type_guid.b, unused_guid.b,
	sizeof(unused_guid.b)) == 0) {

	debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
	(unsigned int)(uintptr_t)pte);

	return 0;
	} else {
	return 1;
	}
	}
	#endif