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 CONFIG_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                 /*
  51                  * error reading Driver Descriptor Block,
  52                  * or no valid Signature
  53                  */
  54                 return (-1);
  55         }
  56
  57         n = 1;  /* assuming at least one partition */
  58         for (i=1; i<=n; ++i) {
  59                 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
  60                     (mpart->signature != MAC_PARTITION_MAGIC) ) {
  61                         return (-1);
  62                 }
  63                 /* update partition count */
  64                 n = mpart->map_count;
  65         }
  66         return (0);
  67 }
  68
  69 static void part_print_mac(struct blk_desc *dev_desc)
  70 {
  71         ulong i, n;
  72         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
  73         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
  74         ldiv_t mb, gb;
  75
  76         if (part_mac_read_ddb (dev_desc, ddesc)) {
  77                 /*
  78                  * error reading Driver Descriptor Block,
  79                  * or no valid Signature
  80                  */
  81                 return;
  82         }
  83
  84         n  = ddesc->blk_count;
  85
  86         mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
  87         /* round to 1 digit */
  88         mb.rem *= 10 * ddesc->blk_size;
  89         mb.rem += 512 * 1024;
  90         mb.rem /= 1024 * 1024;
  91
  92         gb = ldiv(10 * mb.quot + mb.rem, 10240);
  93         gb.rem += 512;
  94         gb.rem /= 1024;
  95
  96
  97         printf ("Block Size=%d, Number of Blocks=%d, "
  98                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
  99                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
 100                 "   #:                 type name"
 101                 "                   length   base       (size)\n",
 102                 ddesc->blk_size,
 103                 ddesc->blk_count,
 104                 mb.quot, mb.rem, gb.quot, gb.rem,
 105                 ddesc->dev_type, ddesc->dev_id
 106                 );
 107
 108         n = 1;  /* assuming at least one partition */
 109         for (i=1; i<=n; ++i) {
 110                 ulong bytes;
 111                 char c;
 112
 113                 printf ("%4ld: ", i);
 114                 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
 115                         printf ("** Can't read Partition Map on %d:%ld **\n",
 116                                 dev_desc->devnum, i);
 117                         return;
 118                 }
 119
 120                 if (mpart->signature != MAC_PARTITION_MAGIC) {
 121                         printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
 122                                dev_desc->devnum, i, MAC_PARTITION_MAGIC,
 123                                mpart->signature);
 124                         return;
 125                 }
 126
 127                 /* update partition count */
 128                 n = mpart->map_count;
 129
 130                 c      = 'k';
 131                 bytes  = mpart->block_count;
 132                 bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512 */
 133                 if (bytes >= 1024) {
 134                         bytes >>= 10;
 135                         c = 'M';
 136                 }
 137                 if (bytes >= 1024) {
 138                         bytes >>= 10;
 139                         c = 'G';
 140                 }
 141
 142                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
 143                         mpart->type,
 144                         mpart->name,
 145                         mpart->block_count,
 146                         mpart->start_block,
 147                         bytes, c
 148                         );
 149         }
 150
 151         return;
 152 }
 153
 154
 155 /*
 156  * Read Device Descriptor Block
 157  */
 158 static int part_mac_read_ddb(struct blk_desc *dev_desc,
 159                              mac_driver_desc_t *ddb_p)
 160 {
 161         if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
 162                 debug("** Can't read Driver Descriptor Block **\n");
 163                 return (-1);
 164         }
 165
 166         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
 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 (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
 187                         printf ("** Can't read Partition Map on %d:%d **\n",
 188                                 dev_desc->devnum, n);
 189                         return (-1);
 190                 }
 191
 192                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
 193                         printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
 194                                dev_desc->devnum, n, MAC_PARTITION_MAGIC,
 195                                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->devnum, part,
 205                                 dev_desc->devnum,
 206                                 dev_desc->devnum, pdb_p->map_count);
 207                         return (-1);
 208                 }
 209
 210                 /* update partition count */
 211                 n = part;
 212         }
 213
 214         /* NOTREACHED */
 215 }
 216
 217 static int part_get_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 U_BOOT_PART_TYPE(mac) = {
 242         .name           = "MAC",
 243         .part_type      = PART_TYPE_MAC,
 244         .max_entries    = MAC_ENTRY_NUMBERS,
 245         .get_info       = part_get_info_mac,
 246         .print          = part_print_mac,
 247         .test           = part_test_mac,
 248 };
 249 #endif