1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2000
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7 /*
8 * Support for harddisk partitions.
9 *
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
13 */
14
15 #include <command.h>
16 #include <log.h>
17 #include <memalign.h>
18 #include "part_mac.h"
19 #include <part.h>
20
21 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
22 #ifndef __ldiv_t_defined
23 typedef struct {
24 long int quot; /* Quotient */
25 long int rem; /* Remainder */
26 } ldiv_t;
27 extern ldiv_t ldiv (long int __numer, long int __denom);
28 # define __ldiv_t_defined 1
29 #endif
30
31 static int part_mac_read_ddb(struct blk_desc *desc, mac_driver_desc_t *ddb_p);
32 static int part_mac_read_pdb(struct blk_desc *desc, int part,
33 mac_partition_t *pdb_p);
34
35 /*
36 * Test for a valid MAC partition
37 */
part_test_mac(struct blk_desc * desc)38 static int part_test_mac(struct blk_desc *desc)
39 {
40 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
41 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
42 ulong i, n;
43
44 if (part_mac_read_ddb(desc, ddesc)) {
45 /*
46 * error reading Driver Descriptor Block,
47 * or no valid Signature
48 */
49 return (-1);
50 }
51
52 n = 1; /* assuming at least one partition */
53 for (i=1; i<=n; ++i) {
54 if ((blk_dread(desc, i, 1, (ulong *)mpart) != 1) ||
55 mpart->signature != MAC_PARTITION_MAGIC) {
56 return (-1);
57 }
58 /* update partition count */
59 n = mpart->map_count;
60 }
61 return (0);
62 }
63
part_print_mac(struct blk_desc * desc)64 static void part_print_mac(struct blk_desc *desc)
65 {
66 ulong i, n;
67 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
68 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
69 ldiv_t mb, gb;
70
71 if (part_mac_read_ddb(desc, ddesc)) {
72 /*
73 * error reading Driver Descriptor Block,
74 * or no valid Signature
75 */
76 return;
77 }
78
79 n = ddesc->blk_count;
80
81 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
82 /* round to 1 digit */
83 mb.rem *= 10 * ddesc->blk_size;
84 mb.rem += 512 * 1024;
85 mb.rem /= 1024 * 1024;
86
87 gb = ldiv(10 * mb.quot + mb.rem, 10240);
88 gb.rem += 512;
89 gb.rem /= 1024;
90
91 printf ("Block Size=%d, Number of Blocks=%d, "
92 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
93 "DeviceType=0x%x, DeviceId=0x%x\n\n"
94 " #: type name"
95 " length base (size)\n",
96 ddesc->blk_size,
97 ddesc->blk_count,
98 mb.quot, mb.rem, gb.quot, gb.rem,
99 ddesc->dev_type, ddesc->dev_id
100 );
101
102 n = 1; /* assuming at least one partition */
103 for (i=1; i<=n; ++i) {
104 ulong bytes;
105 char c;
106
107 printf ("%4ld: ", i);
108 if (blk_dread(desc, i, 1, (ulong *)mpart) != 1) {
109 printf ("** Can't read Partition Map on %d:%ld **\n",
110 desc->devnum, i);
111 return;
112 }
113
114 if (mpart->signature != MAC_PARTITION_MAGIC) {
115 printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
116 desc->devnum, i, MAC_PARTITION_MAGIC,
117 mpart->signature);
118 return;
119 }
120
121 /* update partition count */
122 n = mpart->map_count;
123
124 c = 'k';
125 bytes = mpart->block_count;
126 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */
127 if (bytes >= 1024) {
128 bytes >>= 10;
129 c = 'M';
130 }
131 if (bytes >= 1024) {
132 bytes >>= 10;
133 c = 'G';
134 }
135
136 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
137 mpart->type,
138 mpart->name,
139 mpart->block_count,
140 mpart->start_block,
141 bytes, c
142 );
143 }
144
145 return;
146 }
147
148 /*
149 * Read Device Descriptor Block
150 */
part_mac_read_ddb(struct blk_desc * desc,mac_driver_desc_t * ddb_p)151 static int part_mac_read_ddb(struct blk_desc *desc, mac_driver_desc_t *ddb_p)
152 {
153 if (blk_dread(desc, 0, 1, (ulong *)ddb_p) != 1) {
154 debug("** Can't read Driver Descriptor Block **\n");
155 return (-1);
156 }
157
158 if (ddb_p->signature != MAC_DRIVER_MAGIC) {
159 return (-1);
160 }
161 return (0);
162 }
163
164 /*
165 * Read Partition Descriptor Block
166 */
part_mac_read_pdb(struct blk_desc * desc,int part,mac_partition_t * pdb_p)167 static int part_mac_read_pdb(struct blk_desc *desc, int part,
168 mac_partition_t *pdb_p)
169 {
170 int n = 1;
171
172 for (;;) {
173 /*
174 * We must always read the descritpor block for
175 * partition 1 first since this is the only way to
176 * know how many partitions we have.
177 */
178 if (blk_dread(desc, n, 1, (ulong *)pdb_p) != 1) {
179 printf("** Can't read Partition Map on %d:%d **\n",
180 desc->devnum, n);
181 return (-1);
182 }
183
184 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
185 printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
186 desc->devnum, n, MAC_PARTITION_MAGIC,
187 pdb_p->signature);
188 return (-1);
189 }
190
191 if (n == part)
192 return (0);
193
194 if ((part < 1) || (part > pdb_p->map_count)) {
195 printf("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
196 desc->devnum, part, desc->devnum, desc->devnum,
197 pdb_p->map_count);
198 return (-1);
199 }
200
201 /* update partition count */
202 n = part;
203 }
204
205 /* NOTREACHED */
206 }
207
part_get_info_mac(struct blk_desc * desc,int part,struct disk_partition * info)208 static int part_get_info_mac(struct blk_desc *desc, int part,
209 struct disk_partition *info)
210 {
211 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
212 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
213
214 if (part_mac_read_ddb(desc, ddesc))
215 return -1;
216
217 info->blksz = ddesc->blk_size;
218
219 if (part_mac_read_pdb(desc, part, mpart))
220 return -1;
221
222 info->start = mpart->start_block;
223 info->size = mpart->block_count;
224 memcpy (info->type, mpart->type, sizeof(info->type));
225 memcpy (info->name, mpart->name, sizeof(info->name));
226
227 return (0);
228 }
229
230 U_BOOT_PART_TYPE(mac) = {
231 .name = "MAC",
232 .part_type = PART_TYPE_MAC,
233 .max_entries = MAC_ENTRY_NUMBERS,
234 .get_info = part_get_info_mac,
235 .print = part_print_mac,
236 .test = part_test_mac,
237 };
238