1 // SPDX-License-Identifier: GPL-2.0+
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * Support for harddisk partitions.
10 * To be compatible with LinuxPPC and Apple we use the standard Apple
11 * SCSI disk partitioning scheme. For more information see:
12 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
23 #ifdef CONFIG_HAVE_BLOCK_DEVICE
25 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
26 #ifndef __ldiv_t_defined
28 long int quot; /* Quotient */
29 long int rem; /* Remainder */
31 extern ldiv_t ldiv (long int __numer, long int __denom);
32 # define __ldiv_t_defined 1
36 static int part_mac_read_ddb(struct blk_desc *dev_desc,
37 mac_driver_desc_t *ddb_p);
38 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
39 mac_partition_t *pdb_p);
42 * Test for a valid MAC partition
44 static int part_test_mac(struct blk_desc *dev_desc)
46 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
47 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
50 if (part_mac_read_ddb (dev_desc, ddesc)) {
52 * error reading Driver Descriptor Block,
53 * or no valid Signature
58 n = 1; /* assuming at least one partition */
59 for (i=1; i<=n; ++i) {
60 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
61 (mpart->signature != MAC_PARTITION_MAGIC) ) {
64 /* update partition count */
70 static void part_print_mac(struct blk_desc *dev_desc)
73 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
74 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
77 if (part_mac_read_ddb (dev_desc, ddesc)) {
79 * error reading Driver Descriptor Block,
80 * or no valid Signature
87 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
88 /* round to 1 digit */
89 mb.rem *= 10 * ddesc->blk_size;
91 mb.rem /= 1024 * 1024;
93 gb = ldiv(10 * mb.quot + mb.rem, 10240);
98 printf ("Block Size=%d, Number of Blocks=%d, "
99 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
100 "DeviceType=0x%x, DeviceId=0x%x\n\n"
102 " length base (size)\n",
105 mb.quot, mb.rem, gb.quot, gb.rem,
106 ddesc->dev_type, ddesc->dev_id
109 n = 1; /* assuming at least one partition */
110 for (i=1; i<=n; ++i) {
114 printf ("%4ld: ", i);
115 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
116 printf ("** Can't read Partition Map on %d:%ld **\n",
117 dev_desc->devnum, i);
121 if (mpart->signature != MAC_PARTITION_MAGIC) {
122 printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
123 dev_desc->devnum, i, MAC_PARTITION_MAGIC,
128 /* update partition count */
129 n = mpart->map_count;
132 bytes = mpart->block_count;
133 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
143 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
157 * Read Device Descriptor Block
159 static int part_mac_read_ddb(struct blk_desc *dev_desc,
160 mac_driver_desc_t *ddb_p)
162 if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
163 debug("** Can't read Driver Descriptor Block **\n");
167 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
174 * Read Partition Descriptor Block
176 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
177 mac_partition_t *pdb_p)
183 * We must always read the descritpor block for
184 * partition 1 first since this is the only way to
185 * know how many partitions we have.
187 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
188 printf ("** Can't read Partition Map on %d:%d **\n",
189 dev_desc->devnum, n);
193 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
194 printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
195 dev_desc->devnum, n, MAC_PARTITION_MAGIC,
203 if ((part < 1) || (part > pdb_p->map_count)) {
204 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
205 dev_desc->devnum, part,
207 dev_desc->devnum, pdb_p->map_count);
211 /* update partition count */
218 static int part_get_info_mac(struct blk_desc *dev_desc, int part,
219 struct disk_partition *info)
221 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
222 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
224 if (part_mac_read_ddb (dev_desc, ddesc)) {
228 info->blksz = ddesc->blk_size;
230 if (part_mac_read_pdb (dev_desc, part, mpart)) {
234 info->start = mpart->start_block;
235 info->size = mpart->block_count;
236 memcpy (info->type, mpart->type, sizeof(info->type));
237 memcpy (info->name, mpart->name, sizeof(info->name));
242 U_BOOT_PART_TYPE(mac) = {
244 .part_type = PART_TYPE_MAC,
245 .max_entries = MAC_ENTRY_NUMBERS,
246 .get_info = part_get_info_mac,
247 .print = part_print_mac,
248 .test = part_test_mac,