Commit 07f3d789 authored by richardretanubun's avatar richardretanubun Committed by Wolfgang Denk
Browse files

Add support for CONFIG_EFI_PARTITION (GUID Partition Table)

The GUID (Globally Unique Identifier) Partition Table (GPT) is a part
of EFI. See http://en.wikipedia.org/wiki/GUID_Partition_Table



Based on linux/fs/partitions/efi.[ch]
Signed-off-by: default avatarRichard Retanubun <RichardRetanubun@RugggedCom.com>
parent fbc87dc0
......@@ -687,7 +687,7 @@ The following options need to be configured:
- Partition Support:
CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION
and/or CONFIG_ISO_PARTITION
and/or CONFIG_ISO_PARTITION and/or CONFIG_EFI_PARTITION
If IDE or SCSI support is enabled (CONFIG_CMD_IDE or
CONFIG_CMD_SCSI) you must configure support for at
......
......@@ -32,6 +32,7 @@ COBJS-y += part_mac.o
COBJS-y += part_dos.o
COBJS-y += part_iso.o
COBJS-y += part_amiga.o
COBJS-y += part_efi.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
......
......@@ -212,7 +212,8 @@ void dev_print (block_dev_desc_t *dev_desc)
#if defined(CONFIG_MAC_PARTITION) || \
defined(CONFIG_DOS_PARTITION) || \
defined(CONFIG_ISO_PARTITION) || \
defined(CONFIG_AMIGA_PARTITION)
defined(CONFIG_AMIGA_PARTITION) || \
defined(CONFIG_EFI_PARTITION)
void init_part (block_dev_desc_t * dev_desc)
{
......@@ -230,6 +231,14 @@ void init_part (block_dev_desc_t * dev_desc)
}
#endif
/* must be placed before DOS partition detection */
#ifdef CONFIG_EFI_PARTITION
if (test_part_efi(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_EFI;
return;
}
#endif
#ifdef CONFIG_DOS_PARTITION
if (test_part_dos(dev_desc) == 0) {
dev_desc->part_type = PART_TYPE_DOS;
......@@ -286,6 +295,15 @@ int get_partition_info (block_dev_desc_t *dev_desc, int part
}
break;
#endif
#ifdef CONFIG_EFI_PARTITION
case PART_TYPE_EFI:
if (get_partition_info_efi(dev_desc,part,info) == 0) {
PRINTF ("## Valid EFI partition found ##\n");
return (0);
}
break;
#endif
default:
break;
}
......@@ -356,14 +374,23 @@ void print_part (block_dev_desc_t * dev_desc)
print_part_amiga (dev_desc);
return;
#endif
#ifdef CONFIG_EFI_PARTITION
case PART_TYPE_EFI:
PRINTF ("## Testing for valid EFI partition ##\n");
print_part_header ("EFI", dev_desc);
print_part_efi (dev_desc);
return;
#endif
}
puts ("## Unknown partition table\n");
}
#else /* neither MAC nor DOS nor ISO partition configured */
#else /* neither MAC nor DOS nor ISO nor AMIGA nor EFI partition configured */
# error neither CONFIG_MAC_PARTITION nor CONFIG_DOS_PARTITION
# error nor CONFIG_ISO_PARTITION configured!
# error nor CONFIG_ISO_PARTITION nor CONFIG_AMIGA_PARTITION
# error nor CONFIG_EFI_PARTITION configured!
#endif
#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 CFG_64BIT_LBA:
*
* struct disk_partition.start in include/part.h is sized as ulong.
* When CFG_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"
#if (defined(CONFIG_CMD_IDE) || \
defined(CONFIG_CMD_SATA) || \
defined(CONFIG_CMD_SCSI) || \
defined(CONFIG_CMD_USB) || \
defined(CONFIG_MMC) || \
defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_EFI_PARTITION)
/* 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);
/*
* Public Functions (include/part.h)
*/
void print_part_efi(block_dev_desc_t * dev_desc)
{
gpt_header gpt_head;
gpt_entry **pgpt_pte = NULL;
int i = 0;
if (!dev_desc) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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), pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
return;
}
debug("%s: gpt-entry at 0x%08X\n", __FUNCTION__, (unsigned int)*pgpt_pte);
printf("Part Start LBA End LBA\n");
for (i = 0; i < le32_to_int(gpt_head.num_partition_entries); i++) {
if (is_pte_valid(&(*pgpt_pte)[i])) {
printf("%s%d 0x%llX 0x%llX\n", GPT_ENTRY_NAME,
(i + 1),
le64_to_int((*pgpt_pte)[i].starting_lba),
le64_to_int((*pgpt_pte)[i].ending_lba));
} else {
break; /* Stop at the first non valid PTE */
}
}
/* Remember to free pte */
if (*pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(*pgpt_pte);
}
return;
}
int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
disk_partition_t * info)
{
gpt_header gpt_head;
gpt_entry **pgpt_pte = NULL;
/* "part" argument must be at least 1 */
if (!dev_desc || !info || part < 1) {
printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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), pgpt_pte) != 1) {
printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
return -1;
}
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int((*pgpt_pte)[part - 1].starting_lba);
info->size = (ulong) le64_to_int((*pgpt_pte)[part - 1].ending_lba) - info->start;
info->blksz = GPT_BLOCK_SIZE;
sprintf((char *)info->name, "%s%d\n", GPT_ENTRY_NAME, part);
sprintf((char *)info->type, "U-Boot");
debug("%s: start 0x%lX, size 0x%lX, name %s", __FUNCTION__,
info->start, info->size, info->name);
/* Remember to free pte */
if (*pgpt_pte != NULL) {
debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
free(*pgpt_pte);
}
return 0;
}
int test_part_efi(block_dev_desc_t * dev_desc)
{
legacy_mbr legacymbr;
/* 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", __FUNCTION__);
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);
if (*pgpt_pte != NULL) {
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", __FUNCTION__);
return NULL;
}
count = le32_to_int(pgpt_head->num_partition_entries) *
le32_to_int(pgpt_head->sizeof_partition_entry);
debug("%s: count = %lu * %lu = %u\n", __FUNCTION__,
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 = malloc(count);
}
if (count == 0 || pte == NULL) {
printf("%s: ERROR: Can't allocate 0x%X bytes for GPT Entries\n",
__FUNCTION__, 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", __FUNCTION__);
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", __FUNCTION__,
(unsigned int)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
*/
/*
* See also linux/fs/partitions/efi.h
*
* EFI GUID Partition Table
* Per Intel EFI Specification v1.02
* http://developer.intel.com/technology/efi/efi.htm
*/
#ifndef _DISK_PART_EFI_H
#define _DISK_PART_EFI_H
#define MSDOS_MBR_SIGNATURE 0xAA55
#define EFI_PMBR_OSTYPE_EFI 0xEF
#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
#define GPT_BLOCK_SIZE 512
#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
#define GPT_HEADER_REVISION_V1 0x00010000
#define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
#define GPT_ENTRY_NAME "gpt"
#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
((efi_guid_t) \
{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
(b) & 0xff, ((b) >> 8) & 0xff, \
(c) & 0xff, ((c) >> 8) & 0xff, \
(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
#define PARTITION_SYSTEM_GUID \
EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
#define LEGACY_MBR_PARTITION_GUID \
EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
#define PARTITION_MSFT_RESERVED_GUID \
EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
#define PARTITION_BASIC_DATA_GUID \
EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
#define PARTITION_LINUX_RAID_GUID \
EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
#define PARTITION_LINUX_SWAP_GUID \
EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
#define PARTITION_LINUX_LVM_GUID \
EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
/* linux/include/efi.h */
typedef unsigned short efi_char16_t;
typedef struct {
unsigned char b[16];
} efi_guid_t;
/* based on linux/include/genhd.h */
struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
unsigned char sector; /* starting sector */
unsigned char cyl; /* starting cylinder */
unsigned char sys_ind; /* What partition type */
unsigned char end_head; /* end head */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned char start_sect[4]; /* starting sector counting from 0 */
unsigned char nr_sects[4]; /* nr of sectors in partition */
} __attribute__ ((packed));
/* based on linux/fs/partitions/efi.h */
typedef struct _gpt_header {
unsigned char signature[8];
unsigned char revision[4];
unsigned char header_size[4];
unsigned char header_crc32[4];
unsigned char reserved1[4];
unsigned char my_lba[8];
unsigned char alternate_lba[8];
unsigned char first_usable_lba[8];
unsigned char last_usable_lba[8];
efi_guid_t disk_guid;
unsigned char partition_entry_lba[8];
unsigned char num_partition_entries[4];
unsigned char sizeof_partition_entry[4];
unsigned char partition_entry_array_crc32[4];
unsigned char reserved2[GPT_BLOCK_SIZE - 92];
} __attribute__ ((packed)) gpt_header;
typedef struct _gpt_entry_attributes {
unsigned long long required_to_function:1;
unsigned long long reserved:47;
unsigned long long type_guid_specific:16;
} __attribute__ ((packed)) gpt_entry_attributes;
typedef struct _gpt_entry {
efi_guid_t partition_type_guid;
efi_guid_t unique_partition_guid;
unsigned char starting_lba[8];
unsigned char ending_lba[8];
gpt_entry_attributes attributes;
efi_char16_t partition_name[72 / sizeof(efi_char16_t)];