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 <common.h> 16 #include <command.h> 17 #include <memalign.h> 18 #include <ide.h> 19 #include "part_mac.h" 20 21 #ifdef CONFIG_HAVE_BLOCK_DEVICE 22 23 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */ 24 #ifndef __ldiv_t_defined 25 typedef struct { 26 long int quot; /* Quotient */ 27 long int rem; /* Remainder */ 28 } ldiv_t; 29 extern ldiv_t ldiv (long int __numer, long int __denom); 30 # define __ldiv_t_defined 1 31 #endif 32 33 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); 38 39 /* 40 * Test for a valid MAC partition 41 */ 42 static int part_test_mac(struct blk_desc *dev_desc) 43 { 44 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 45 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 46 ulong i, n; 47 48 if (part_mac_read_ddb (dev_desc, ddesc)) { 49 /* 50 * error reading Driver Descriptor Block, 51 * or no valid Signature 52 */ 53 return (-1); 54 } 55 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) ) { 60 return (-1); 61 } 62 /* update partition count */ 63 n = mpart->map_count; 64 } 65 return (0); 66 } 67 68 static void part_print_mac(struct blk_desc *dev_desc) 69 { 70 ulong i, n; 71 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 72 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 73 ldiv_t mb, gb; 74 75 if (part_mac_read_ddb (dev_desc, ddesc)) { 76 /* 77 * error reading Driver Descriptor Block, 78 * or no valid Signature 79 */ 80 return; 81 } 82 83 n = ddesc->blk_count; 84 85 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 86 /* round to 1 digit */ 87 mb.rem *= 10 * ddesc->blk_size; 88 mb.rem += 512 * 1024; 89 mb.rem /= 1024 * 1024; 90 91 gb = ldiv(10 * mb.quot + mb.rem, 10240); 92 gb.rem += 512; 93 gb.rem /= 1024; 94 95 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" 99 " #: type name" 100 " length base (size)\n", 101 ddesc->blk_size, 102 ddesc->blk_count, 103 mb.quot, mb.rem, gb.quot, gb.rem, 104 ddesc->dev_type, ddesc->dev_id 105 ); 106 107 n = 1; /* assuming at least one partition */ 108 for (i=1; i<=n; ++i) { 109 ulong bytes; 110 char c; 111 112 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); 116 return; 117 } 118 119 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, 122 mpart->signature); 123 return; 124 } 125 126 /* update partition count */ 127 n = mpart->map_count; 128 129 c = 'k'; 130 bytes = mpart->block_count; 131 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */ 132 if (bytes >= 1024) { 133 bytes >>= 10; 134 c = 'M'; 135 } 136 if (bytes >= 1024) { 137 bytes >>= 10; 138 c = 'G'; 139 } 140 141 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 142 mpart->type, 143 mpart->name, 144 mpart->block_count, 145 mpart->start_block, 146 bytes, c 147 ); 148 } 149 150 return; 151 } 152 153 154 /* 155 * Read Device Descriptor Block 156 */ 157 static int part_mac_read_ddb(struct blk_desc *dev_desc, 158 mac_driver_desc_t *ddb_p) 159 { 160 if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) { 161 debug("** Can't read Driver Descriptor Block **\n"); 162 return (-1); 163 } 164 165 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 166 return (-1); 167 } 168 return (0); 169 } 170 171 /* 172 * Read Partition Descriptor Block 173 */ 174 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part, 175 mac_partition_t *pdb_p) 176 { 177 int n = 1; 178 179 for (;;) { 180 /* 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. 184 */ 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); 188 return (-1); 189 } 190 191 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, 194 pdb_p->signature); 195 return (-1); 196 } 197 198 if (n == part) 199 return (0); 200 201 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, 204 dev_desc->devnum, 205 dev_desc->devnum, pdb_p->map_count); 206 return (-1); 207 } 208 209 /* update partition count */ 210 n = part; 211 } 212 213 /* NOTREACHED */ 214 } 215 216 static int part_get_info_mac(struct blk_desc *dev_desc, int part, 217 disk_partition_t *info) 218 { 219 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 220 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 221 222 if (part_mac_read_ddb (dev_desc, ddesc)) { 223 return (-1); 224 } 225 226 info->blksz = ddesc->blk_size; 227 228 if (part_mac_read_pdb (dev_desc, part, mpart)) { 229 return (-1); 230 } 231 232 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)); 236 237 return (0); 238 } 239 240 U_BOOT_PART_TYPE(mac) = { 241 .name = "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, 247 }; 248 #endif 249