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