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 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 /* error reading Driver Desriptor Block, or no valid Signature */ 51 return (-1); 52 } 53 54 n = 1; /* assuming at least one partition */ 55 for (i=1; i<=n; ++i) { 56 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) || 57 (mpart->signature != MAC_PARTITION_MAGIC) ) { 58 return (-1); 59 } 60 /* update partition count */ 61 n = mpart->map_count; 62 } 63 return (0); 64 } 65 66 static void part_print_mac(struct blk_desc *dev_desc) 67 { 68 ulong i, n; 69 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 70 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 71 ldiv_t mb, gb; 72 73 if (part_mac_read_ddb (dev_desc, ddesc)) { 74 /* error reading Driver Desriptor Block, or no valid Signature */ 75 return; 76 } 77 78 n = ddesc->blk_count; 79 80 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 81 /* round to 1 digit */ 82 mb.rem *= 10 * ddesc->blk_size; 83 mb.rem += 512 * 1024; 84 mb.rem /= 1024 * 1024; 85 86 gb = ldiv(10 * mb.quot + mb.rem, 10240); 87 gb.rem += 512; 88 gb.rem /= 1024; 89 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(dev_desc, i, 1, (ulong *)mpart) != 1) { 109 printf ("** Can't read Partition Map on %d:%ld **\n", 110 dev_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 dev_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 /* 150 * Read Device Descriptor Block 151 */ 152 static int part_mac_read_ddb(struct blk_desc *dev_desc, 153 mac_driver_desc_t *ddb_p) 154 { 155 if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) { 156 printf ("** Can't read Driver Desriptor Block **\n"); 157 return (-1); 158 } 159 160 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 161 #if 0 162 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n", 163 MAC_DRIVER_MAGIC, ddb_p->signature); 164 #endif 165 return (-1); 166 } 167 return (0); 168 } 169 170 /* 171 * Read Partition Descriptor Block 172 */ 173 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part, 174 mac_partition_t *pdb_p) 175 { 176 int n = 1; 177 178 for (;;) { 179 /* 180 * We must always read the descritpor block for 181 * partition 1 first since this is the only way to 182 * know how many partitions we have. 183 */ 184 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) { 185 printf ("** Can't read Partition Map on %d:%d **\n", 186 dev_desc->devnum, n); 187 return (-1); 188 } 189 190 if (pdb_p->signature != MAC_PARTITION_MAGIC) { 191 printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n", 192 dev_desc->devnum, n, MAC_PARTITION_MAGIC, 193 pdb_p->signature); 194 return (-1); 195 } 196 197 if (n == part) 198 return (0); 199 200 if ((part < 1) || (part > pdb_p->map_count)) { 201 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n", 202 dev_desc->devnum, part, 203 dev_desc->devnum, 204 dev_desc->devnum, pdb_p->map_count); 205 return (-1); 206 } 207 208 /* update partition count */ 209 n = part; 210 } 211 212 /* NOTREACHED */ 213 } 214 215 static int part_get_info_mac(struct blk_desc *dev_desc, int part, 216 disk_partition_t *info) 217 { 218 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 219 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 220 221 if (part_mac_read_ddb (dev_desc, ddesc)) { 222 return (-1); 223 } 224 225 info->blksz = ddesc->blk_size; 226 227 if (part_mac_read_pdb (dev_desc, part, mpart)) { 228 return (-1); 229 } 230 231 info->start = mpart->start_block; 232 info->size = mpart->block_count; 233 memcpy (info->type, mpart->type, sizeof(info->type)); 234 memcpy (info->name, mpart->name, sizeof(info->name)); 235 236 return (0); 237 } 238 239 U_BOOT_PART_TYPE(mac) = { 240 .name = "MAC", 241 .part_type = PART_TYPE_MAC, 242 .max_entries = MAC_ENTRY_NUMBERS, 243 .get_info = part_get_info_mac, 244 .print = part_print_mac, 245 .test = part_test_mac, 246 }; 247 #endif 248