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Diffstat (limited to 'disk/part_dos.c')
-rw-r--r-- | disk/part_dos.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/disk/part_dos.c b/disk/part_dos.c new file mode 100644 index 00000000000..8e71baae0dd --- /dev/null +++ b/disk/part_dos.c @@ -0,0 +1,233 @@ +/* + * (C) Copyright 2001 + * Raymond Lo, lo@routefree.com + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 + */ + +/* + * 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 <cmd_disk.h> +#include "part_dos.h" + +#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_DOS_PARTITION) + +/* 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 void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num) +{ + int lba_start = ext_part_sector + le32_to_int (p->start4); + int lba_size = le32_to_int (p->size4); + + printf ("%5d\t\t%10d\t%10d\t%2x%s\n", + part_num, lba_start, lba_size, p->sys_ind, + (is_extended (p->sys_ind) ? " Extd" : "")); +} + + + +int test_part_dos (block_dev_desc_t *dev_desc) +{ + unsigned char buffer[DEFAULT_SECTOR_SIZE]; + + if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) || + (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || + (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { + 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 char buffer[DEFAULT_SECTOR_SIZE]; + 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; + } + 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; + } + + /* 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); + } + + /* 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); + } + } + + 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 char buffer[DEFAULT_SECTOR_SIZE]; + 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 -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; + } + + /* 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 && part_num == which_part) { + info->blksz = 512; + info->start = ext_part_sector + le32_to_int (pt->start4); + info->size = le32_to_int (pt->size4); + switch(dev_desc->if_type) { + case IF_TYPE_IDE: + case IF_TYPE_ATAPI: + sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + case IF_TYPE_SCSI: + sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + case IF_TYPE_USB: + sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + case IF_TYPE_DOC: + sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + default: + sprintf (info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num); + break; + } + /* sprintf(info->type, "%d, pt->sys_ind); */ + sprintf (info->type, "U-Boot"); + 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); + } + } + return -1; +} + +void print_part_dos (block_dev_desc_t *dev_desc) +{ + printf ("Partition Start Sector Num Sectors Type\n"); + print_partition_extended (dev_desc, 0, 0, 1); +} + +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); +} + + + +#endif /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */ |