3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 * Support for harddisk partitions.
11 * To be compatible with LinuxPPC and Apple we use the standard Apple
12 * SCSI disk partitioning scheme. For more information see:
13 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
22 #ifdef CONFIG_HAVE_BLOCK_DEVICE
24 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
25 #ifndef __ldiv_t_defined
27 long int quot; /* Quotient */
28 long int rem; /* Remainder */
30 extern ldiv_t ldiv (long int __numer, long int __denom);
31 # define __ldiv_t_defined 1
35 static int part_mac_read_ddb(struct blk_desc *dev_desc,
36 mac_driver_desc_t *ddb_p);
37 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
38 mac_partition_t *pdb_p);
41 * Test for a valid MAC partition
43 static int part_test_mac(struct blk_desc *dev_desc)
45 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
46 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
49 if (part_mac_read_ddb (dev_desc, ddesc)) {
51 * error reading Driver Descriptor Block,
52 * or no valid Signature
57 n = 1; /* assuming at least one partition */
58 for (i=1; i<=n; ++i) {
59 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
60 (mpart->signature != MAC_PARTITION_MAGIC) ) {
63 /* update partition count */
69 static void part_print_mac(struct blk_desc *dev_desc)
72 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
73 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
76 if (part_mac_read_ddb (dev_desc, ddesc)) {
78 * error reading Driver Descriptor Block,
79 * or no valid Signature
86 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
87 /* round to 1 digit */
88 mb.rem *= 10 * ddesc->blk_size;
90 mb.rem /= 1024 * 1024;
92 gb = ldiv(10 * mb.quot + mb.rem, 10240);
97 printf ("Block Size=%d, Number of Blocks=%d, "
98 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
99 "DeviceType=0x%x, DeviceId=0x%x\n\n"
101 " length base (size)\n",
104 mb.quot, mb.rem, gb.quot, gb.rem,
105 ddesc->dev_type, ddesc->dev_id
108 n = 1; /* assuming at least one partition */
109 for (i=1; i<=n; ++i) {
113 printf ("%4ld: ", i);
114 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
115 printf ("** Can't read Partition Map on %d:%ld **\n",
116 dev_desc->devnum, i);
120 if (mpart->signature != MAC_PARTITION_MAGIC) {
121 printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
122 dev_desc->devnum, i, MAC_PARTITION_MAGIC,
127 /* update partition count */
128 n = mpart->map_count;
131 bytes = mpart->block_count;
132 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
142 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
156 * Read Device Descriptor Block
158 static int part_mac_read_ddb(struct blk_desc *dev_desc,
159 mac_driver_desc_t *ddb_p)
161 if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
162 debug("** Can't read Driver Descriptor Block **\n");
166 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
173 * Read Partition Descriptor Block
175 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
176 mac_partition_t *pdb_p)
182 * We must always read the descritpor block for
183 * partition 1 first since this is the only way to
184 * know how many partitions we have.
186 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
187 printf ("** Can't read Partition Map on %d:%d **\n",
188 dev_desc->devnum, n);
192 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
193 printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
194 dev_desc->devnum, n, MAC_PARTITION_MAGIC,
202 if ((part < 1) || (part > pdb_p->map_count)) {
203 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
204 dev_desc->devnum, part,
206 dev_desc->devnum, pdb_p->map_count);
210 /* update partition count */
217 static int part_get_info_mac(struct blk_desc *dev_desc, int part,
218 disk_partition_t *info)
220 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
221 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
223 if (part_mac_read_ddb (dev_desc, ddesc)) {
227 info->blksz = ddesc->blk_size;
229 if (part_mac_read_pdb (dev_desc, part, mpart)) {
233 info->start = mpart->start_block;
234 info->size = mpart->block_count;
235 memcpy (info->type, mpart->type, sizeof(info->type));
236 memcpy (info->name, mpart->name, sizeof(info->name));
241 U_BOOT_PART_TYPE(mac) = {
243 .part_type = PART_TYPE_MAC,
244 .max_entries = MAC_ENTRY_NUMBERS,
245 .get_info = part_get_info_mac,
246 .print = part_print_mac,
247 .test = part_test_mac,