disk/part_mac.c

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