disk/part_mac.c

   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 (defined(CONFIG_CMD_IDE) || \
  38      defined(CONFIG_CMD_SCSI) || \
  39      defined(CONFIG_CMD_USB) || \
  40      defined(CONFIG_MMC) || \
  41      defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_MAC_PARTITION)
  42
  43 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
  44 #ifndef __ldiv_t_defined
  45 typedef struct {
  46         long int quot;          /* Quotient     */
  47         long int rem;           /* Remainder    */
  48 } ldiv_t;
  49 extern ldiv_t ldiv (long int __numer, long int __denom);
  50 # define __ldiv_t_defined       1
  51 #endif
  52
  53
  54 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p);
  55 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p);
  56
  57 /*
  58  * Test for a valid MAC partition
  59  */
  60 int test_part_mac (block_dev_desc_t *dev_desc)
  61 {
  62         mac_driver_desc_t       ddesc;
  63         mac_partition_t         mpart;
  64         ulong i, n;
  65
  66         if (part_mac_read_ddb (dev_desc, &ddesc)) {
  67                 /* error reading Driver Desriptor Block, or no valid Signature */
  68                 return (-1);
  69         }
  70
  71         n = 1;  /* assuming at least one partition */
  72         for (i=1; i<=n; ++i) {
  73                 if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)&mpart) != 1) ||
  74                     (mpart.signature != MAC_PARTITION_MAGIC) ) {
  75                         return (-1);
  76                 }
  77                 /* update partition count */
  78                 n = mpart.map_count;
  79         }
  80         return (0);
  81 }
  82
  83
  84 void print_part_mac (block_dev_desc_t *dev_desc)
  85 {
  86         ulong i, n;
  87         mac_driver_desc_t       ddesc;
  88         mac_partition_t         mpart;
  89         ldiv_t mb, gb;
  90
  91         if (part_mac_read_ddb (dev_desc, &ddesc)) {
  92                 /* error reading Driver Desriptor Block, or no valid Signature */
  93                 return;
  94         }
  95
  96         n  = ddesc.blk_count;
  97
  98         mb = ldiv(n, ((1024 * 1024) / ddesc.blk_size)); /* MB */
  99         /* round to 1 digit */
 100         mb.rem *= 10 * ddesc.blk_size;
 101         mb.rem += 512 * 1024;
 102         mb.rem /= 1024 * 1024;
 103
 104         gb = ldiv(10 * mb.quot + mb.rem, 10240);
 105         gb.rem += 512;
 106         gb.rem /= 1024;
 107
 108
 109         printf ("Block Size=%d, Number of Blocks=%d, "
 110                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
 111                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
 112                 "   #:                 type name"
 113                 "                   length   base       (size)\n",
 114                 ddesc.blk_size,
 115                 ddesc.blk_count,
 116                 mb.quot, mb.rem, gb.quot, gb.rem,
 117                 ddesc.dev_type, ddesc.dev_id
 118                 );
 119
 120         n = 1;  /* assuming at least one partition */
 121         for (i=1; i<=n; ++i) {
 122                 ulong bytes;
 123                 char c;
 124
 125                 printf ("%4ld: ", i);
 126                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)&mpart) != 1) {
 127                         printf ("** Can't read Partition Map on %d:%ld **\n",
 128                                 dev_desc->dev, i);
 129                         return;
 130                 }
 131
 132                 if (mpart.signature != MAC_PARTITION_MAGIC) {
 133                         printf ("** Bad Signature on %d:%ld - "
 134                                 "expected 0x%04x, got 0x%04x\n",
 135                                 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart.signature);
 136                         return;
 137                 }
 138
 139                 /* update partition count */
 140                 n = mpart.map_count;
 141
 142                 c      = 'k';
 143                 bytes  = mpart.block_count;
 144                 bytes /= (1024 / ddesc.blk_size);  /* kB; assumes blk_size == 512 */
 145                 if (bytes >= 1024) {
 146                         bytes >>= 10;
 147                         c = 'M';
 148                 }
 149                 if (bytes >= 1024) {
 150                         bytes >>= 10;
 151                         c = 'G';
 152                 }
 153
 154                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
 155                         mpart.type,
 156                         mpart.name,
 157                         mpart.block_count,
 158                         mpart.start_block,
 159                         bytes, c
 160                         );
 161         }
 162
 163         return;
 164 }
 165
 166
 167 /*
 168  * Read Device Descriptor Block
 169  */
 170 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p)
 171 {
 172         if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)ddb_p) != 1) {
 173                 printf ("** Can't read Driver Desriptor Block **\n");
 174                 return (-1);
 175         }
 176
 177         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
 178 #if 0
 179                 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
 180                         MAC_DRIVER_MAGIC, ddb_p->signature);
 181 #endif
 182                 return (-1);
 183         }
 184         return (0);
 185 }
 186
 187 /*
 188  * Read Partition Descriptor Block
 189  */
 190 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p)
 191 {
 192         int n = 1;
 193
 194         for (;;) {
 195                 /*
 196                  * We must always read the descritpor block for
 197                  * partition 1 first since this is the only way to
 198                  * know how many partitions we have.
 199                  */
 200                 if (dev_desc->block_read (dev_desc->dev, n, 1, (ulong *)pdb_p) != 1) {
 201                         printf ("** Can't read Partition Map on %d:%d **\n",
 202                                 dev_desc->dev, n);
 203                         return (-1);
 204                 }
 205
 206                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
 207                         printf ("** Bad Signature on %d:%d: "
 208                                 "expected 0x%04x, got 0x%04x\n",
 209                                 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature);
 210                         return (-1);
 211                 }
 212
 213                 if (n == part)
 214                         return (0);
 215
 216                 if ((part < 1) || (part > pdb_p->map_count)) {
 217                         printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
 218                                 dev_desc->dev, part,
 219                                 dev_desc->dev,
 220                                 dev_desc->dev, pdb_p->map_count);
 221                         return (-1);
 222                 }
 223
 224                 /* update partition count */
 225                 n = part;
 226         }
 227
 228         /* NOTREACHED */
 229 }
 230
 231 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
 232 {
 233         mac_driver_desc_t       ddesc;
 234         mac_partition_t         mpart;
 235
 236         if (part_mac_read_ddb (dev_desc, &ddesc)) {
 237                 return (-1);
 238         }
 239
 240         info->blksz = ddesc.blk_size;
 241
 242         if (part_mac_read_pdb (dev_desc, part, &mpart)) {
 243                 return (-1);
 244         }
 245
 246         info->start = mpart.start_block;
 247         info->size  = mpart.block_count;
 248         memcpy (info->type, mpart.type, sizeof(info->type));
 249         memcpy (info->name, mpart.name, sizeof(info->name));
 250
 251         return (0);
 252 }
 253
 254 #endif