| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2001 |
| * Raymond Lo, lo@routefree.com |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| */ |
| |
| /* |
| * 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 <memalign.h> |
| #include "part_dos.h" |
| |
| #ifdef CONFIG_HAVE_BLOCK_DEVICE |
| |
| #define DOS_PART_DEFAULT_SECTOR 512 |
| |
| /* Convert char[4] in little endian format to the host format integer |
| */ |
| static inline unsigned 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->sys_ind == 0xef) || (p->boot_ind == 0x80); |
| } |
| |
| static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector, |
| int part_num, unsigned int disksig) |
| { |
| lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4); |
| lbaint_t lba_size = le32_to_int (p->size4); |
| |
| printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength |
| "u\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 */ |
| } |
| |
| |
| static int part_test_dos(struct blk_desc *dev_desc) |
| { |
| #ifndef CONFIG_SPL_BUILD |
| ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, |
| DIV_ROUND_UP(dev_desc->blksz, sizeof(legacy_mbr))); |
| |
| if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) |
| return -1; |
| |
| if (test_block_type((unsigned char *)mbr) != DOS_MBR) |
| return -1; |
| |
| if (dev_desc->sig_type == SIG_TYPE_NONE && |
| mbr->unique_mbr_signature != 0) { |
| dev_desc->sig_type = SIG_TYPE_MBR; |
| dev_desc->mbr_sig = mbr->unique_mbr_signature; |
| } |
| #else |
| ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); |
| |
| if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1) |
| return -1; |
| |
| if (test_block_type(buffer) != DOS_MBR) |
| return -1; |
| #endif |
| |
| return 0; |
| } |
| |
| /* Print a partition that is relative to its Extended partition table |
| */ |
| static void print_partition_extended(struct blk_desc *dev_desc, |
| lbaint_t ext_part_sector, |
| lbaint_t relative, |
| int part_num, unsigned int disksig) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); |
| dos_partition_t *pt; |
| int i; |
| |
| if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) { |
| printf ("** Can't read partition table on %d:" LBAFU " **\n", |
| dev_desc->devnum, 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)) { |
| lbaint_t 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 part_get_info_extended(struct blk_desc *dev_desc, |
| lbaint_t ext_part_sector, lbaint_t 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 (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) { |
| printf ("** Can't read partition table on %d:" LBAFU " **\n", |
| dev_desc->devnum, 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; |
| } |
| |
| #if CONFIG_IS_ENABLED(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) && |
| (ext_part_sector == 0 || 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); |
| part_set_generic_name(dev_desc, part_num, |
| (char *)info->name); |
| /* sprintf(info->type, "%d, pt->sys_ind); */ |
| strcpy((char *)info->type, "U-Boot"); |
| info->bootable = is_bootable(pt); |
| #if CONFIG_IS_ENABLED(PARTITION_UUIDS) |
| sprintf(info->uuid, "%08x-%02x", disksig, part_num); |
| #endif |
| info->sys_ind = pt->sys_ind; |
| 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)) { |
| lbaint_t lba_start |
| = le32_to_int (pt->start4) + relative; |
| |
| return part_get_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; |
| strcpy((char *)info->type, "U-Boot"); |
| #if CONFIG_IS_ENABLED(PARTITION_UUIDS) |
| info->uuid[0] = 0; |
| #endif |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| void part_print_dos(struct blk_desc *dev_desc) |
| { |
| printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); |
| print_partition_extended(dev_desc, 0, 0, 1, 0); |
| } |
| |
| int part_get_info_dos(struct blk_desc *dev_desc, int part, |
| disk_partition_t *info) |
| { |
| return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0); |
| } |
| |
| int is_valid_dos_buf(void *buf) |
| { |
| return test_block_type(buf) == DOS_MBR ? 0 : -1; |
| } |
| |
| int write_mbr_partition(struct blk_desc *dev_desc, void *buf) |
| { |
| if (is_valid_dos_buf(buf)) |
| return -1; |
| |
| /* write MBR */ |
| if (blk_dwrite(dev_desc, 0, 1, buf) != 1) { |
| printf("%s: failed writing '%s' (1 blks at 0x0)\n", |
| __func__, "MBR"); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| U_BOOT_PART_TYPE(dos) = { |
| .name = "DOS", |
| .part_type = PART_TYPE_DOS, |
| .max_entries = DOS_ENTRY_NUMBERS, |
| .get_info = part_get_info_ptr(part_get_info_dos), |
| .print = part_print_ptr(part_print_dos), |
| .test = part_test_dos, |
| }; |
| |
| #endif |