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 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 int test_part_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)) {
50 /* error reading Driver Desriptor Block, or no valid Signature */
54 n = 1; /* assuming at least one partition */
55 for (i=1; i<=n; ++i) {
56 if ((dev_desc->block_read(dev_desc, i, 1,
57 (ulong *)mpart) != 1) ||
58 (mpart->signature != MAC_PARTITION_MAGIC) ) {
61 /* update partition count */
68 void print_part_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)) {
76 /* error reading Driver Desriptor Block, or no valid Signature */
82 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
83 /* round to 1 digit */
84 mb.rem *= 10 * ddesc->blk_size;
86 mb.rem /= 1024 * 1024;
88 gb = ldiv(10 * mb.quot + mb.rem, 10240);
93 printf ("Block Size=%d, Number of Blocks=%d, "
94 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
95 "DeviceType=0x%x, DeviceId=0x%x\n\n"
97 " length base (size)\n",
100 mb.quot, mb.rem, gb.quot, gb.rem,
101 ddesc->dev_type, ddesc->dev_id
104 n = 1; /* assuming at least one partition */
105 for (i=1; i<=n; ++i) {
109 printf ("%4ld: ", i);
110 if (dev_desc->block_read(dev_desc, i, 1, (ulong *)mpart) != 1) {
111 printf ("** Can't read Partition Map on %d:%ld **\n",
116 if (mpart->signature != MAC_PARTITION_MAGIC) {
117 printf ("** Bad Signature on %d:%ld - "
118 "expected 0x%04x, got 0x%04x\n",
119 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature);
123 /* update partition count */
124 n = mpart->map_count;
127 bytes = mpart->block_count;
128 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
138 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
152 * Read Device Descriptor Block
154 static int part_mac_read_ddb(struct blk_desc *dev_desc,
155 mac_driver_desc_t *ddb_p)
157 if (dev_desc->block_read(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
158 printf ("** Can't read Driver Desriptor Block **\n");
162 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
164 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
165 MAC_DRIVER_MAGIC, ddb_p->signature);
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 (dev_desc->block_read(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
187 printf ("** Can't read Partition Map on %d:%d **\n",
192 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
193 printf ("** Bad Signature on %d:%d: "
194 "expected 0x%04x, got 0x%04x\n",
195 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature);
202 if ((part < 1) || (part > pdb_p->map_count)) {
203 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
206 dev_desc->dev, pdb_p->map_count);
210 /* update partition count */
217 int get_partition_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));