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 static 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 */
67 static void print_part_mac(struct blk_desc *dev_desc)
70 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
71 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
74 if (part_mac_read_ddb (dev_desc, ddesc)) {
75 /* error reading Driver Desriptor Block, or no valid Signature */
81 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
82 /* round to 1 digit */
83 mb.rem *= 10 * ddesc->blk_size;
85 mb.rem /= 1024 * 1024;
87 gb = ldiv(10 * mb.quot + mb.rem, 10240);
92 printf ("Block Size=%d, Number of Blocks=%d, "
93 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
94 "DeviceType=0x%x, DeviceId=0x%x\n\n"
96 " length base (size)\n",
99 mb.quot, mb.rem, gb.quot, gb.rem,
100 ddesc->dev_type, ddesc->dev_id
103 n = 1; /* assuming at least one partition */
104 for (i=1; i<=n; ++i) {
108 printf ("%4ld: ", i);
109 if (dev_desc->block_read(dev_desc, i, 1, (ulong *)mpart) != 1) {
110 printf ("** Can't read Partition Map on %d:%ld **\n",
111 dev_desc->devnum, i);
115 if (mpart->signature != MAC_PARTITION_MAGIC) {
116 printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
117 dev_desc->devnum, i, MAC_PARTITION_MAGIC,
122 /* update partition count */
123 n = mpart->map_count;
126 bytes = mpart->block_count;
127 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
137 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
151 * Read Device Descriptor Block
153 static int part_mac_read_ddb(struct blk_desc *dev_desc,
154 mac_driver_desc_t *ddb_p)
156 if (dev_desc->block_read(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
157 printf ("** Can't read Driver Desriptor Block **\n");
161 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
163 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
164 MAC_DRIVER_MAGIC, ddb_p->signature);
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 (dev_desc->block_read(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 .get_info = part_get_info_mac,
244 .print = print_part_mac,
245 .test = test_part_mac,