1 // SPDX-License-Identifier: GPL-2.0+
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
22 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
23 #ifndef __ldiv_t_defined
25 long int quot; /* Quotient */
26 long int rem; /* Remainder */
28 extern ldiv_t ldiv (long int __numer, long int __denom);
29 # define __ldiv_t_defined 1
33 static int part_mac_read_ddb(struct blk_desc *desc, mac_driver_desc_t *ddb_p);
34 static int part_mac_read_pdb(struct blk_desc *desc, int part,
35 mac_partition_t *pdb_p);
38 * Test for a valid MAC partition
40 static int part_test_mac(struct blk_desc *desc)
42 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
43 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
46 if (part_mac_read_ddb(desc, ddesc)) {
48 * error reading Driver Descriptor Block,
49 * or no valid Signature
54 n = 1; /* assuming at least one partition */
55 for (i=1; i<=n; ++i) {
56 if ((blk_dread(desc, i, 1, (ulong *)mpart) != 1) ||
57 mpart->signature != MAC_PARTITION_MAGIC) {
60 /* update partition count */
66 static void part_print_mac(struct blk_desc *desc)
69 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
70 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
73 if (part_mac_read_ddb(desc, ddesc)) {
75 * error reading Driver Descriptor Block,
76 * or no valid Signature
83 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
84 /* round to 1 digit */
85 mb.rem *= 10 * ddesc->blk_size;
87 mb.rem /= 1024 * 1024;
89 gb = ldiv(10 * mb.quot + mb.rem, 10240);
94 printf ("Block Size=%d, Number of Blocks=%d, "
95 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
96 "DeviceType=0x%x, DeviceId=0x%x\n\n"
98 " length base (size)\n",
101 mb.quot, mb.rem, gb.quot, gb.rem,
102 ddesc->dev_type, ddesc->dev_id
105 n = 1; /* assuming at least one partition */
106 for (i=1; i<=n; ++i) {
110 printf ("%4ld: ", i);
111 if (blk_dread(desc, i, 1, (ulong *)mpart) != 1) {
112 printf ("** Can't read Partition Map on %d:%ld **\n",
117 if (mpart->signature != MAC_PARTITION_MAGIC) {
118 printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
119 desc->devnum, i, MAC_PARTITION_MAGIC,
124 /* update partition count */
125 n = mpart->map_count;
128 bytes = mpart->block_count;
129 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
139 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
153 * Read Device Descriptor Block
155 static int part_mac_read_ddb(struct blk_desc *desc, mac_driver_desc_t *ddb_p)
157 if (blk_dread(desc, 0, 1, (ulong *)ddb_p) != 1) {
158 debug("** Can't read Driver Descriptor Block **\n");
162 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
169 * Read Partition Descriptor Block
171 static int part_mac_read_pdb(struct blk_desc *desc, int part,
172 mac_partition_t *pdb_p)
178 * We must always read the descritpor block for
179 * partition 1 first since this is the only way to
180 * know how many partitions we have.
182 if (blk_dread(desc, n, 1, (ulong *)pdb_p) != 1) {
183 printf("** Can't read Partition Map on %d:%d **\n",
188 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
189 printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
190 desc->devnum, n, MAC_PARTITION_MAGIC,
198 if ((part < 1) || (part > pdb_p->map_count)) {
199 printf("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
200 desc->devnum, part, desc->devnum, desc->devnum,
205 /* update partition count */
212 static int part_get_info_mac(struct blk_desc *desc, int part,
213 struct disk_partition *info)
215 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
216 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
218 if (part_mac_read_ddb(desc, ddesc))
221 info->blksz = ddesc->blk_size;
223 if (part_mac_read_pdb(desc, part, mpart))
226 info->start = mpart->start_block;
227 info->size = mpart->block_count;
228 memcpy (info->type, mpart->type, sizeof(info->type));
229 memcpy (info->name, mpart->name, sizeof(info->name));
234 U_BOOT_PART_TYPE(mac) = {
236 .part_type = PART_TYPE_MAC,
237 .max_entries = MAC_ENTRY_NUMBERS,
238 .get_info = part_get_info_mac,
239 .print = part_print_mac,
240 .test = part_test_mac,