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/*
* (C) Copyright 2001
* Raymond Lo, lo@routefree.com
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* 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 "part_dos.h"
#ifdef HAVE_BLOCK_DEVICE
#define DOS_PART_DEFAULT_SECTOR 512
/* Convert char[4] in little endian format to the host format integer
*/
static inline 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->boot_ind == 0x80;
}
static void print_one_part(dos_partition_t *p, int ext_part_sector,
int part_num, unsigned int disksig)
{
int lba_start = ext_part_sector + le32_to_int (p->start4);
int lba_size = le32_to_int (p->size4);
printf("%3d\t%-10d\t%-10d\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;
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];
for (slot = 0; slot < 3; slot++) {
if (p->boot_ind != 0 && p->boot_ind != 0x80) {
if (!slot &&
(strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
"FAT", 3) == 0 ||
strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
"FAT32", 5) == 0)) {
return DOS_PBR; /* is PBR */
} else {
return -1;
}
}
}
return DOS_MBR; /* Is MBR */
}
int test_part_dos (block_dev_desc_t *dev_desc)
{
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1)
return -1;
if (test_block_type(buffer) != DOS_MBR)
return -1;
return 0;
}
/* Print a partition that is relative to its Extended partition table
*/
static void print_partition_extended(block_dev_desc_t *dev_desc,
int ext_part_sector, int relative,
int part_num, unsigned int disksig)
{
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
dos_partition_t *pt;
int i;
if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
printf ("** Can't read partition table on %d:%d **\n",
dev_desc->dev, 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)) {
int 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 get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
int 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;
if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
printf ("** Can't read partition table on %d:%d **\n",
dev_desc->dev, 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;
}
#ifdef CONFIG_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) &&
(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);
switch(dev_desc->if_type) {
case IF_TYPE_IDE:
case IF_TYPE_SATA:
case IF_TYPE_ATAPI:
sprintf ((char *)info->name, "hd%c%d",
'a' + dev_desc->dev, part_num);
break;
case IF_TYPE_SCSI:
sprintf ((char *)info->name, "sd%c%d",
'a' + dev_desc->dev, part_num);
break;
case IF_TYPE_USB:
sprintf ((char *)info->name, "usbd%c%d",
'a' + dev_desc->dev, part_num);
break;
case IF_TYPE_DOC:
sprintf ((char *)info->name, "docd%c%d",
'a' + dev_desc->dev, part_num);
break;
default:
sprintf ((char *)info->name, "xx%c%d",
'a' + dev_desc->dev, part_num);
break;
}
/* sprintf(info->type, "%d, pt->sys_ind); */
sprintf ((char *)info->type, "U-Boot");
info->bootable = is_bootable(pt);
#ifdef CONFIG_PARTITION_UUIDS
sprintf(info->uuid, "%08x-%02x", disksig, part_num);
#endif
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)) {
int lba_start = le32_to_int (pt->start4) + relative;
return get_partition_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;
sprintf ((char *)info->type, "U-Boot");
#ifdef CONFIG_PARTITION_UUIDS
info->uuid[0] = 0;
#endif
return 0;
}
return -1;
}
void print_part_dos (block_dev_desc_t *dev_desc)
{
printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
print_partition_extended(dev_desc, 0, 0, 1, 0);
}
int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
{
return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);
}
#endif
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