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