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
21 #ifdef CONFIG_HAVE_BLOCK_DEVICE
23 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
24 #ifndef __ldiv_t_defined
26 long int quot; /* Quotient */
27 long int rem; /* Remainder */
29 extern ldiv_t ldiv (long int __numer, long int __denom);
30 # define __ldiv_t_defined 1
34 static int part_mac_read_ddb(struct blk_desc *dev_desc,
35 mac_driver_desc_t *ddb_p);
36 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
37 mac_partition_t *pdb_p);
40 * Test for a valid MAC partition
42 static int part_test_mac(struct blk_desc *dev_desc)
44 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
45 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
48 if (part_mac_read_ddb (dev_desc, ddesc)) {
50 * error reading Driver Descriptor Block,
51 * or no valid Signature
56 n = 1; /* assuming at least one partition */
57 for (i=1; i<=n; ++i) {
58 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
59 (mpart->signature != MAC_PARTITION_MAGIC) ) {
62 /* update partition count */
68 static void part_print_mac(struct blk_desc *dev_desc)
71 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
72 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
75 if (part_mac_read_ddb (dev_desc, ddesc)) {
77 * error reading Driver Descriptor Block,
78 * or no valid Signature
85 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
86 /* round to 1 digit */
87 mb.rem *= 10 * ddesc->blk_size;
89 mb.rem /= 1024 * 1024;
91 gb = ldiv(10 * mb.quot + mb.rem, 10240);
96 printf ("Block Size=%d, Number of Blocks=%d, "
97 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
98 "DeviceType=0x%x, DeviceId=0x%x\n\n"
100 " length base (size)\n",
103 mb.quot, mb.rem, gb.quot, gb.rem,
104 ddesc->dev_type, ddesc->dev_id
107 n = 1; /* assuming at least one partition */
108 for (i=1; i<=n; ++i) {
112 printf ("%4ld: ", i);
113 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
114 printf ("** Can't read Partition Map on %d:%ld **\n",
115 dev_desc->devnum, i);
119 if (mpart->signature != MAC_PARTITION_MAGIC) {
120 printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
121 dev_desc->devnum, i, MAC_PARTITION_MAGIC,
126 /* update partition count */
127 n = mpart->map_count;
130 bytes = mpart->block_count;
131 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
141 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
155 * Read Device Descriptor Block
157 static int part_mac_read_ddb(struct blk_desc *dev_desc,
158 mac_driver_desc_t *ddb_p)
160 if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
161 debug("** Can't read Driver Descriptor Block **\n");
165 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
172 * Read Partition Descriptor Block
174 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
175 mac_partition_t *pdb_p)
181 * We must always read the descritpor block for
182 * partition 1 first since this is the only way to
183 * know how many partitions we have.
185 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
186 printf ("** Can't read Partition Map on %d:%d **\n",
187 dev_desc->devnum, n);
191 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
192 printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
193 dev_desc->devnum, n, MAC_PARTITION_MAGIC,
201 if ((part < 1) || (part > pdb_p->map_count)) {
202 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
203 dev_desc->devnum, part,
205 dev_desc->devnum, pdb_p->map_count);
209 /* update partition count */
216 static int part_get_info_mac(struct blk_desc *dev_desc, int part,
217 disk_partition_t *info)
219 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
220 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
222 if (part_mac_read_ddb (dev_desc, ddesc)) {
226 info->blksz = ddesc->blk_size;
228 if (part_mac_read_pdb (dev_desc, part, mpart)) {
232 info->start = mpart->start_block;
233 info->size = mpart->block_count;
234 memcpy (info->type, mpart->type, sizeof(info->type));
235 memcpy (info->name, mpart->name, sizeof(info->name));
240 U_BOOT_PART_TYPE(mac) = {
242 .part_type = PART_TYPE_MAC,
243 .max_entries = MAC_ENTRY_NUMBERS,
244 .get_info = part_get_info_mac,
245 .print = part_print_mac,
246 .test = part_test_mac,