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-rw-r--r--disk/part_dos.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/disk/part_dos.c b/disk/part_dos.c
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+++ b/disk/part_dos.c
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+/*
+ * (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 */
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