/* * (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 /* 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; 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 = 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_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); } } 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