uboot/disk/part_mac.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2000
   4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5 */
   6
   7/*
   8 * Support for harddisk partitions.
   9 *
  10 * To be compatible with LinuxPPC and Apple we use the standard Apple
  11 * SCSI disk partitioning scheme. For more information see:
  12 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
  13 */
  14
  15#include <common.h>
  16#include <command.h>
  17#include <memalign.h>
  18#include <ide.h>
  19#include "part_mac.h"
  20
  21#ifdef CONFIG_HAVE_BLOCK_DEVICE
  22
  23/* stdlib.h causes some compatibility problems; should fixe these! -- wd */
  24#ifndef __ldiv_t_defined
  25typedef struct {
  26        long int quot;          /* Quotient     */
  27        long int rem;           /* Remainder    */
  28} ldiv_t;
  29extern ldiv_t ldiv (long int __numer, long int __denom);
  30# define __ldiv_t_defined       1
  31#endif
  32
  33
  34static int part_mac_read_ddb(struct blk_desc *dev_desc,
  35                             mac_driver_desc_t *ddb_p);
  36static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
  37                             mac_partition_t *pdb_p);
  38
  39/*
  40 * Test for a valid MAC partition
  41 */
  42static int part_test_mac(struct blk_desc *dev_desc)
  43{
  44        ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
  45        ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
  46        ulong i, n;
  47
  48        if (part_mac_read_ddb (dev_desc, ddesc)) {
  49                /*
  50                 * error reading Driver Descriptor Block,
  51                 * or no valid Signature
  52                 */
  53                return (-1);
  54        }
  55
  56        n = 1;  /* assuming at least one partition */
  57        for (i=1; i<=n; ++i) {
  58                if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
  59                    (mpart->signature != MAC_PARTITION_MAGIC) ) {
  60                        return (-1);
  61                }
  62                /* update partition count */
  63                n = mpart->map_count;
  64        }
  65        return (0);
  66}
  67
  68static void part_print_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                /*
  77                 * error reading Driver Descriptor Block,
  78                 * or no valid Signature
  79                 */
  80                return;
  81        }
  82
  83        n  = ddesc->blk_count;
  84
  85        mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
  86        /* round to 1 digit */
  87        mb.rem *= 10 * ddesc->blk_size;
  88        mb.rem += 512 * 1024;
  89        mb.rem /= 1024 * 1024;
  90
  91        gb = ldiv(10 * mb.quot + mb.rem, 10240);
  92        gb.rem += 512;
  93        gb.rem /= 1024;
  94
  95
  96        printf ("Block Size=%d, Number of Blocks=%d, "
  97                "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
  98                "DeviceType=0x%x, DeviceId=0x%x\n\n"
  99                "   #:                 type name"
 100                "                   length   base       (size)\n",
 101                ddesc->blk_size,
 102                ddesc->blk_count,
 103                mb.quot, mb.rem, gb.quot, gb.rem,
 104                ddesc->dev_type, ddesc->dev_id
 105                );
 106
 107        n = 1;  /* assuming at least one partition */
 108        for (i=1; i<=n; ++i) {
 109                ulong bytes;
 110                char c;
 111
 112                printf ("%4ld: ", i);
 113                if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
 114                        printf ("** Can't read Partition Map on %d:%ld **\n",
 115                                dev_desc->devnum, i);
 116                        return;
 117                }
 118
 119                if (mpart->signature != MAC_PARTITION_MAGIC) {
 120                        printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
 121                               dev_desc->devnum, i, MAC_PARTITION_MAGIC,
 122                               mpart->signature);
 123                        return;
 124                }
 125
 126                /* update partition count */
 127                n = mpart->map_count;
 128
 129                c      = 'k';
 130                bytes  = mpart->block_count;
 131                bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512 */
 132                if (bytes >= 1024) {
 133                        bytes >>= 10;
 134                        c = 'M';
 135                }
 136                if (bytes >= 1024) {
 137                        bytes >>= 10;
 138                        c = 'G';
 139                }
 140
 141                printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
 142                        mpart->type,
 143                        mpart->name,
 144                        mpart->block_count,
 145                        mpart->start_block,
 146                        bytes, c
 147                        );
 148        }
 149
 150        return;
 151}
 152
 153
 154/*
 155 * Read Device Descriptor Block
 156 */
 157static int part_mac_read_ddb(struct blk_desc *dev_desc,
 158                             mac_driver_desc_t *ddb_p)
 159{
 160        if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
 161                debug("** Can't read Driver Descriptor Block **\n");
 162                return (-1);
 163        }
 164
 165        if (ddb_p->signature != MAC_DRIVER_MAGIC) {
 166                return (-1);
 167        }
 168        return (0);
 169}
 170
 171/*
 172 * Read Partition Descriptor Block
 173 */
 174static 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 (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
 186                        printf ("** Can't read Partition Map on %d:%d **\n",
 187                                dev_desc->devnum, n);
 188                        return (-1);
 189                }
 190
 191                if (pdb_p->signature != MAC_PARTITION_MAGIC) {
 192                        printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
 193                               dev_desc->devnum, n, MAC_PARTITION_MAGIC,
 194                               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->devnum, part,
 204                                dev_desc->devnum,
 205                                dev_desc->devnum, pdb_p->map_count);
 206                        return (-1);
 207                }
 208
 209                /* update partition count */
 210                n = part;
 211        }
 212
 213        /* NOTREACHED */
 214}
 215
 216static 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
 240U_BOOT_PART_TYPE(mac) = {
 241        .name           = "MAC",
 242        .part_type      = PART_TYPE_MAC,
 243        .max_entries    = MAC_ENTRY_NUMBERS,
 244        .get_info       = part_get_info_mac,
 245        .print          = part_print_mac,
 246        .test           = part_test_mac,
 247};
 248#endif
 249