1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* 25 * Support for harddisk partitions. 26 * 27 * To be compatible with LinuxPPC and Apple we use the standard Apple 28 * SCSI disk partitioning scheme. For more information see: 29 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92 30 */ 31 32 #include <common.h> 33 #include <command.h> 34 #include <ide.h> 35 #include "part_mac.h" 36 37 #if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_MAC_PARTITION) 38 39 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */ 40 #ifndef __ldiv_t_defined 41 typedef struct { 42 long int quot; /* Quotient */ 43 long int rem; /* Remainder */ 44 } ldiv_t; 45 extern ldiv_t ldiv (long int __numer, long int __denom); 46 # define __ldiv_t_defined 1 47 #endif 48 49 50 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p); 51 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p); 52 53 /* 54 * Test for a valid MAC partition 55 */ 56 int test_part_mac (block_dev_desc_t *dev_desc) 57 { 58 mac_driver_desc_t ddesc; 59 mac_partition_t mpart; 60 ulong i, n; 61 62 if (part_mac_read_ddb (dev_desc, &ddesc)) { 63 /* error reading Driver Desriptor Block, or no valid Signature */ 64 return (-1); 65 } 66 67 n = 1; /* assuming at least one partition */ 68 for (i=1; i<=n; ++i) { 69 if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)&mpart) != 1) || 70 (mpart.signature != MAC_PARTITION_MAGIC) ) { 71 return (-1); 72 } 73 /* update partition count */ 74 n = mpart.map_count; 75 } 76 return (0); 77 } 78 79 80 void print_part_mac (block_dev_desc_t *dev_desc) 81 { 82 ulong i, n; 83 mac_driver_desc_t ddesc; 84 mac_partition_t mpart; 85 ldiv_t mb, gb; 86 87 if (part_mac_read_ddb (dev_desc, &ddesc)) { 88 /* error reading Driver Desriptor Block, or no valid Signature */ 89 return; 90 } 91 92 n = ddesc.blk_count; 93 94 mb = ldiv(n, ((1024 * 1024) / ddesc.blk_size)); /* MB */ 95 /* round to 1 digit */ 96 mb.rem *= 10 * ddesc.blk_size; 97 mb.rem += 512 * 1024; 98 mb.rem /= 1024 * 1024; 99 100 gb = ldiv(10 * mb.quot + mb.rem, 10240); 101 gb.rem += 512; 102 gb.rem /= 1024; 103 104 105 printf ("Block Size=%d, Number of Blocks=%d, " 106 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n" 107 "DeviceType=0x%x, DeviceId=0x%x\n\n" 108 " #: type name" 109 " length base (size)\n", 110 ddesc.blk_size, 111 ddesc.blk_count, 112 mb.quot, mb.rem, gb.quot, gb.rem, 113 ddesc.dev_type, ddesc.dev_id 114 ); 115 116 n = 1; /* assuming at least one partition */ 117 for (i=1; i<=n; ++i) { 118 ulong bytes; 119 char c; 120 121 printf ("%4ld: ", i); 122 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)&mpart) != 1) { 123 printf ("** Can't read Partition Map on %d:%ld **\n", 124 dev_desc->dev, i); 125 return; 126 } 127 128 if (mpart.signature != MAC_PARTITION_MAGIC) { 129 printf ("** Bad Signature on %d:%ld - " 130 "expected 0x%04x, got 0x%04x\n", 131 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart.signature); 132 return; 133 } 134 135 /* update partition count */ 136 n = mpart.map_count; 137 138 c = 'k'; 139 bytes = mpart.block_count; 140 bytes /= (1024 / ddesc.blk_size); /* kB; assumes blk_size == 512 */ 141 if (bytes >= 1024) { 142 bytes >>= 10; 143 c = 'M'; 144 } 145 if (bytes >= 1024) { 146 bytes >>= 10; 147 c = 'G'; 148 } 149 150 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 151 mpart.type, 152 mpart.name, 153 mpart.block_count, 154 mpart.start_block, 155 bytes, c 156 ); 157 } 158 159 return; 160 } 161 162 163 /* 164 * Read Device Descriptor Block 165 */ 166 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p) 167 { 168 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)ddb_p) != 1) { 169 printf ("** Can't read Driver Desriptor Block **\n"); 170 return (-1); 171 } 172 173 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 174 #if 0 175 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n", 176 MAC_DRIVER_MAGIC, ddb_p->signature); 177 #endif 178 return (-1); 179 } 180 return (0); 181 } 182 183 /* 184 * Read Partition Descriptor Block 185 */ 186 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p) 187 { 188 int n = 1; 189 190 for (;;) { 191 /* 192 * We must always read the descritpor block for 193 * partition 1 first since this is the only way to 194 * know how many partitions we have. 195 */ 196 if (dev_desc->block_read (dev_desc->dev, n, 1, (ulong *)pdb_p) != 1) { 197 printf ("** Can't read Partition Map on %d:%d **\n", 198 dev_desc->dev, n); 199 return (-1); 200 } 201 202 if (pdb_p->signature != MAC_PARTITION_MAGIC) { 203 printf ("** Bad Signature on %d:%d: " 204 "expected 0x%04x, got 0x%04x\n", 205 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature); 206 return (-1); 207 } 208 209 if (n == part) 210 return (0); 211 212 if ((part < 1) || (part > pdb_p->map_count)) { 213 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n", 214 dev_desc->dev, part, 215 dev_desc->dev, 216 dev_desc->dev, pdb_p->map_count); 217 return (-1); 218 } 219 220 /* update partition count */ 221 n = part; 222 } 223 224 /* NOTREACHED */ 225 } 226 227 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info) 228 { 229 mac_driver_desc_t ddesc; 230 mac_partition_t mpart; 231 232 if (part_mac_read_ddb (dev_desc, &ddesc)) { 233 return (-1); 234 } 235 236 info->blksz = ddesc.blk_size; 237 238 if (part_mac_read_pdb (dev_desc, part, &mpart)) { 239 return (-1); 240 } 241 242 info->start = mpart.start_block; 243 info->size = mpart.block_count; 244 memcpy (info->type, mpart.type, sizeof(info->type)); 245 memcpy (info->name, mpart.name, sizeof(info->name)); 246 247 return (0); 248 } 249 250 #endif /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_MAC_PARTITION */ 251