1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* 9 * Support for harddisk partitions. 10 * 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 14 */ 15 16 #include <common.h> 17 #include <command.h> 18 #include <memalign.h> 19 #include <ide.h> 20 #include "part_mac.h" 21 22 #ifdef CONFIG_HAVE_BLOCK_DEVICE 23 24 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */ 25 #ifndef __ldiv_t_defined 26 typedef struct { 27 long int quot; /* Quotient */ 28 long int rem; /* Remainder */ 29 } ldiv_t; 30 extern ldiv_t ldiv (long int __numer, long int __denom); 31 # define __ldiv_t_defined 1 32 #endif 33 34 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); 39 40 /* 41 * Test for a valid MAC partition 42 */ 43 static int part_test_mac(struct blk_desc *dev_desc) 44 { 45 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 46 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 47 ulong i, n; 48 49 if (part_mac_read_ddb (dev_desc, ddesc)) { 50 /* 51 * error reading Driver Descriptor Block, 52 * or no valid Signature 53 */ 54 return (-1); 55 } 56 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) ) { 61 return (-1); 62 } 63 /* update partition count */ 64 n = mpart->map_count; 65 } 66 return (0); 67 } 68 69 static void part_print_mac(struct blk_desc *dev_desc) 70 { 71 ulong i, n; 72 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 73 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 74 ldiv_t mb, gb; 75 76 if (part_mac_read_ddb (dev_desc, ddesc)) { 77 /* 78 * error reading Driver Descriptor Block, 79 * or no valid Signature 80 */ 81 return; 82 } 83 84 n = ddesc->blk_count; 85 86 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 87 /* round to 1 digit */ 88 mb.rem *= 10 * ddesc->blk_size; 89 mb.rem += 512 * 1024; 90 mb.rem /= 1024 * 1024; 91 92 gb = ldiv(10 * mb.quot + mb.rem, 10240); 93 gb.rem += 512; 94 gb.rem /= 1024; 95 96 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" 100 " #: type name" 101 " length base (size)\n", 102 ddesc->blk_size, 103 ddesc->blk_count, 104 mb.quot, mb.rem, gb.quot, gb.rem, 105 ddesc->dev_type, ddesc->dev_id 106 ); 107 108 n = 1; /* assuming at least one partition */ 109 for (i=1; i<=n; ++i) { 110 ulong bytes; 111 char c; 112 113 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); 117 return; 118 } 119 120 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, 123 mpart->signature); 124 return; 125 } 126 127 /* update partition count */ 128 n = mpart->map_count; 129 130 c = 'k'; 131 bytes = mpart->block_count; 132 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */ 133 if (bytes >= 1024) { 134 bytes >>= 10; 135 c = 'M'; 136 } 137 if (bytes >= 1024) { 138 bytes >>= 10; 139 c = 'G'; 140 } 141 142 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 143 mpart->type, 144 mpart->name, 145 mpart->block_count, 146 mpart->start_block, 147 bytes, c 148 ); 149 } 150 151 return; 152 } 153 154 155 /* 156 * Read Device Descriptor Block 157 */ 158 static int part_mac_read_ddb(struct blk_desc *dev_desc, 159 mac_driver_desc_t *ddb_p) 160 { 161 if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) { 162 debug("** Can't read Driver Descriptor Block **\n"); 163 return (-1); 164 } 165 166 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 167 return (-1); 168 } 169 return (0); 170 } 171 172 /* 173 * Read Partition Descriptor Block 174 */ 175 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part, 176 mac_partition_t *pdb_p) 177 { 178 int n = 1; 179 180 for (;;) { 181 /* 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. 185 */ 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); 189 return (-1); 190 } 191 192 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, 195 pdb_p->signature); 196 return (-1); 197 } 198 199 if (n == part) 200 return (0); 201 202 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, 205 dev_desc->devnum, 206 dev_desc->devnum, pdb_p->map_count); 207 return (-1); 208 } 209 210 /* update partition count */ 211 n = part; 212 } 213 214 /* NOTREACHED */ 215 } 216 217 static int part_get_info_mac(struct blk_desc *dev_desc, int part, 218 disk_partition_t *info) 219 { 220 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 221 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 222 223 if (part_mac_read_ddb (dev_desc, ddesc)) { 224 return (-1); 225 } 226 227 info->blksz = ddesc->blk_size; 228 229 if (part_mac_read_pdb (dev_desc, part, mpart)) { 230 return (-1); 231 } 232 233 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)); 237 238 return (0); 239 } 240 241 U_BOOT_PART_TYPE(mac) = { 242 .name = "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, 248 }; 249 #endif 250