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