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 #ifdef HAVE_BLOCK_DEVICE
  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         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
  59         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
  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         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
  84         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
  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         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
 230         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
 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