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 <cmd_disk.h>
  36 #include "part_mac.h"
  37
  38 #if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_MAC_PARTITION)
  39
  40 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
  41 #ifndef __ldiv_t_defined
  42 typedef struct {
  43         long int quot;          /* Quotient     */
  44         long int rem;           /* Remainder    */
  45 } ldiv_t;
  46 extern ldiv_t ldiv (long int __numer, long int __denom);
  47 # define __ldiv_t_defined       1
  48 #endif
  49
  50
  51 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p);
  52 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p);
  53
  54 /*
  55  * Test for a valid MAC partition
  56  */
  57 int test_part_mac (block_dev_desc_t *dev_desc)
  58 {
  59         mac_driver_desc_t       ddesc;
  60         mac_partition_t         mpart;
  61         ulong i, n;
  62
  63         if (part_mac_read_ddb (dev_desc, &ddesc)) {
  64                 /* error reading Driver Desriptor Block, or no valid Signature */
  65                 return (-1);
  66         }
  67
  68         n = 1;  /* assuming at least one partition */
  69         for (i=1; i<=n; ++i) {
  70                 if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)&mpart) != 1) ||
  71                     (mpart.signature != MAC_PARTITION_MAGIC) ) {
  72                         return (-1);
  73                 }
  74                 /* update partition count */
  75                 n = mpart.map_count;
  76         }
  77         return (0);
  78 }
  79
  80
  81 void print_part_mac (block_dev_desc_t *dev_desc)
  82 {
  83         ulong i, n;
  84         mac_driver_desc_t       ddesc;
  85         mac_partition_t         mpart;
  86         ldiv_t mb, gb;
  87
  88         if (part_mac_read_ddb (dev_desc, &ddesc)) {
  89                 /* error reading Driver Desriptor Block, or no valid Signature */
  90                 return;
  91         }
  92
  93         n  = ddesc.blk_count;
  94
  95         mb = ldiv(n, ((1024 * 1024) / ddesc.blk_size)); /* MB */
  96         /* round to 1 digit */
  97         mb.rem *= 10 * ddesc.blk_size;
  98         mb.rem += 512 * 1024;
  99         mb.rem /= 1024 * 1024;
 100
 101         gb = ldiv(10 * mb.quot + mb.rem, 10240);
 102         gb.rem += 512;
 103         gb.rem /= 1024;
 104
 105
 106         printf ("Block Size=%d, Number of Blocks=%d, "
 107                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
 108                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
 109                 "   #:                 type name"
 110                 "                   length   base       (size)\n",
 111                 ddesc.blk_size,
 112                 ddesc.blk_count,
 113                 mb.quot, mb.rem, gb.quot, gb.rem,
 114                 ddesc.dev_type, ddesc.dev_id
 115                 );
 116
 117         n = 1;  /* assuming at least one partition */
 118         for (i=1; i<=n; ++i) {
 119                 ulong bytes;
 120                 char c;
 121
 122                 printf ("%4ld: ", i);
 123                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)&mpart) != 1) {
 124                         printf ("** Can't read Partition Map on %d:%ld **\n",
 125                                 dev_desc->dev, i);
 126                         return;
 127                 }
 128
 129                 if (mpart.signature != MAC_PARTITION_MAGIC) {
 130                         printf ("** Bad Signature on %d:%ld - "
 131                                 "expected 0x%04x, got 0x%04x\n",
 132                                 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart.signature);
 133                         return;
 134                 }
 135
 136                 /* update partition count */
 137                 n = mpart.map_count;
 138
 139                 c      = 'k';
 140                 bytes  = mpart.block_count;
 141                 bytes /= (1024 / ddesc.blk_size);  /* kB; assumes blk_size == 512 */
 142                 if (bytes >= 1024) {
 143                         bytes >>= 10;
 144                         c = 'M';
 145                 }
 146                 if (bytes >= 1024) {
 147                         bytes >>= 10;
 148                         c = 'G';
 149                 }
 150
 151                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
 152                         mpart.type,
 153                         mpart.name,
 154                         mpart.block_count,
 155                         mpart.start_block,
 156                         bytes, c
 157                         );
 158         }
 159
 160         return;
 161 }
 162
 163
 164 /*
 165  * Read Device Descriptor Block
 166  */
 167 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p)
 168 {
 169         if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)ddb_p) != 1) {
 170                 printf ("** Can't read Driver Desriptor Block **\n");
 171                 return (-1);
 172         }
 173
 174         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
 175 #if 0
 176                 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
 177                         MAC_DRIVER_MAGIC, ddb_p->signature);
 178 #endif
 179                 return (-1);
 180         }
 181         return (0);
 182 }
 183
 184 /*
 185  * Read Partition Descriptor Block
 186  */
 187 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p)
 188 {
 189         int n = 1;
 190
 191         for (;;) {
 192                 /*
 193                  * We must always read the descritpor block for
 194                  * partition 1 first since this is the only way to
 195                  * know how many partitions we have.
 196                  */
 197                 if (dev_desc->block_read (dev_desc->dev, n, 1, (ulong *)pdb_p) != 1) {
 198                         printf ("** Can't read Partition Map on %d:%d **\n",
 199                                 dev_desc->dev, n);
 200                         return (-1);
 201                 }
 202
 203                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
 204                         printf ("** Bad Signature on %d:%d: "
 205                                 "expected 0x%04x, got 0x%04x\n",
 206                                 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature);
 207                         return (-1);
 208                 }
 209
 210                 if (n == part)
 211                         return (0);
 212
 213                 if ((part < 1) || (part > pdb_p->map_count)) {
 214                         printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
 215                                 dev_desc->dev, part,
 216                                 dev_desc->dev,
 217                                 dev_desc->dev, pdb_p->map_count);
 218                         return (-1);
 219                 }
 220
 221                 /* update partition count */
 222                 n = part;
 223         }
 224
 225         /* NOTREACHED */
 226 }
 227
 228 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
 229 {
 230         mac_driver_desc_t       ddesc;
 231         mac_partition_t         mpart;
 232
 233         if (part_mac_read_ddb (dev_desc, &ddesc)) {
 234                 return (-1);
 235         }
 236
 237         info->blksz = ddesc.blk_size;
 238
 239         if (part_mac_read_pdb (dev_desc, part, &mpart)) {
 240                 return (-1);
 241         }
 242
 243         info->start = mpart.start_block;
 244         info->size  = mpart.block_count;
 245         memcpy (info->type, mpart.type, sizeof(info->type));
 246         memcpy (info->name, mpart.name, sizeof(info->name));
 247
 248         return (0);
 249 }
 250
 251 #endif  /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_MAC_PARTITION */