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 <ide.h> 19 #include "part_mac.h" 20 21 #ifdef HAVE_BLOCK_DEVICE 22 23 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */ 24 #ifndef __ldiv_t_defined 25 typedef struct { 26 long int quot; /* Quotient */ 27 long int rem; /* Remainder */ 28 } ldiv_t; 29 extern ldiv_t ldiv (long int __numer, long int __denom); 30 # define __ldiv_t_defined 1 31 #endif 32 33 34 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p); 35 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p); 36 37 /* 38 * Test for a valid MAC partition 39 */ 40 int test_part_mac (block_dev_desc_t *dev_desc) 41 { 42 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 43 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 44 ulong i, n; 45 46 if (part_mac_read_ddb (dev_desc, ddesc)) { 47 /* error reading Driver Desriptor Block, or no valid Signature */ 48 return (-1); 49 } 50 51 n = 1; /* assuming at least one partition */ 52 for (i=1; i<=n; ++i) { 53 if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)mpart) != 1) || 54 (mpart->signature != MAC_PARTITION_MAGIC) ) { 55 return (-1); 56 } 57 /* update partition count */ 58 n = mpart->map_count; 59 } 60 return (0); 61 } 62 63 64 void print_part_mac (block_dev_desc_t *dev_desc) 65 { 66 ulong i, n; 67 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 68 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 69 ldiv_t mb, gb; 70 71 if (part_mac_read_ddb (dev_desc, ddesc)) { 72 /* error reading Driver Desriptor Block, or no valid Signature */ 73 return; 74 } 75 76 n = ddesc->blk_count; 77 78 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 79 /* round to 1 digit */ 80 mb.rem *= 10 * ddesc->blk_size; 81 mb.rem += 512 * 1024; 82 mb.rem /= 1024 * 1024; 83 84 gb = ldiv(10 * mb.quot + mb.rem, 10240); 85 gb.rem += 512; 86 gb.rem /= 1024; 87 88 89 printf ("Block Size=%d, Number of Blocks=%d, " 90 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n" 91 "DeviceType=0x%x, DeviceId=0x%x\n\n" 92 " #: type name" 93 " length base (size)\n", 94 ddesc->blk_size, 95 ddesc->blk_count, 96 mb.quot, mb.rem, gb.quot, gb.rem, 97 ddesc->dev_type, ddesc->dev_id 98 ); 99 100 n = 1; /* assuming at least one partition */ 101 for (i=1; i<=n; ++i) { 102 ulong bytes; 103 char c; 104 105 printf ("%4ld: ", i); 106 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)mpart) != 1) { 107 printf ("** Can't read Partition Map on %d:%ld **\n", 108 dev_desc->dev, i); 109 return; 110 } 111 112 if (mpart->signature != MAC_PARTITION_MAGIC) { 113 printf ("** Bad Signature on %d:%ld - " 114 "expected 0x%04x, got 0x%04x\n", 115 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature); 116 return; 117 } 118 119 /* update partition count */ 120 n = mpart->map_count; 121 122 c = 'k'; 123 bytes = mpart->block_count; 124 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */ 125 if (bytes >= 1024) { 126 bytes >>= 10; 127 c = 'M'; 128 } 129 if (bytes >= 1024) { 130 bytes >>= 10; 131 c = 'G'; 132 } 133 134 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 135 mpart->type, 136 mpart->name, 137 mpart->block_count, 138 mpart->start_block, 139 bytes, c 140 ); 141 } 142 143 return; 144 } 145 146 147 /* 148 * Read Device Descriptor Block 149 */ 150 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p) 151 { 152 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)ddb_p) != 1) { 153 printf ("** Can't read Driver Desriptor Block **\n"); 154 return (-1); 155 } 156 157 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 158 #if 0 159 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n", 160 MAC_DRIVER_MAGIC, ddb_p->signature); 161 #endif 162 return (-1); 163 } 164 return (0); 165 } 166 167 /* 168 * Read Partition Descriptor Block 169 */ 170 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p) 171 { 172 int n = 1; 173 174 for (;;) { 175 /* 176 * We must always read the descritpor block for 177 * partition 1 first since this is the only way to 178 * know how many partitions we have. 179 */ 180 if (dev_desc->block_read (dev_desc->dev, n, 1, (ulong *)pdb_p) != 1) { 181 printf ("** Can't read Partition Map on %d:%d **\n", 182 dev_desc->dev, n); 183 return (-1); 184 } 185 186 if (pdb_p->signature != MAC_PARTITION_MAGIC) { 187 printf ("** Bad Signature on %d:%d: " 188 "expected 0x%04x, got 0x%04x\n", 189 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature); 190 return (-1); 191 } 192 193 if (n == part) 194 return (0); 195 196 if ((part < 1) || (part > pdb_p->map_count)) { 197 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n", 198 dev_desc->dev, part, 199 dev_desc->dev, 200 dev_desc->dev, pdb_p->map_count); 201 return (-1); 202 } 203 204 /* update partition count */ 205 n = part; 206 } 207 208 /* NOTREACHED */ 209 } 210 211 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info) 212 { 213 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 214 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 215 216 if (part_mac_read_ddb (dev_desc, ddesc)) { 217 return (-1); 218 } 219 220 info->blksz = ddesc->blk_size; 221 222 if (part_mac_read_pdb (dev_desc, part, mpart)) { 223 return (-1); 224 } 225 226 info->start = mpart->start_block; 227 info->size = mpart->block_count; 228 memcpy (info->type, mpart->type, sizeof(info->type)); 229 memcpy (info->name, mpart->name, sizeof(info->name)); 230 231 return (0); 232 } 233 234 #endif 235