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 (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p); 36 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p); 37 38 /* 39 * Test for a valid MAC partition 40 */ 41 int test_part_mac (block_dev_desc_t *dev_desc) 42 { 43 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 44 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 45 ulong i, n; 46 47 if (part_mac_read_ddb (dev_desc, ddesc)) { 48 /* error reading Driver Desriptor Block, or no valid Signature */ 49 return (-1); 50 } 51 52 n = 1; /* assuming at least one partition */ 53 for (i=1; i<=n; ++i) { 54 if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)mpart) != 1) || 55 (mpart->signature != MAC_PARTITION_MAGIC) ) { 56 return (-1); 57 } 58 /* update partition count */ 59 n = mpart->map_count; 60 } 61 return (0); 62 } 63 64 65 void print_part_mac (block_dev_desc_t *dev_desc) 66 { 67 ulong i, n; 68 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 69 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 70 ldiv_t mb, gb; 71 72 if (part_mac_read_ddb (dev_desc, ddesc)) { 73 /* error reading Driver Desriptor Block, or no valid Signature */ 74 return; 75 } 76 77 n = ddesc->blk_count; 78 79 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 80 /* round to 1 digit */ 81 mb.rem *= 10 * ddesc->blk_size; 82 mb.rem += 512 * 1024; 83 mb.rem /= 1024 * 1024; 84 85 gb = ldiv(10 * mb.quot + mb.rem, 10240); 86 gb.rem += 512; 87 gb.rem /= 1024; 88 89 90 printf ("Block Size=%d, Number of Blocks=%d, " 91 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n" 92 "DeviceType=0x%x, DeviceId=0x%x\n\n" 93 " #: type name" 94 " length base (size)\n", 95 ddesc->blk_size, 96 ddesc->blk_count, 97 mb.quot, mb.rem, gb.quot, gb.rem, 98 ddesc->dev_type, ddesc->dev_id 99 ); 100 101 n = 1; /* assuming at least one partition */ 102 for (i=1; i<=n; ++i) { 103 ulong bytes; 104 char c; 105 106 printf ("%4ld: ", i); 107 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)mpart) != 1) { 108 printf ("** Can't read Partition Map on %d:%ld **\n", 109 dev_desc->dev, i); 110 return; 111 } 112 113 if (mpart->signature != MAC_PARTITION_MAGIC) { 114 printf ("** Bad Signature on %d:%ld - " 115 "expected 0x%04x, got 0x%04x\n", 116 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature); 117 return; 118 } 119 120 /* update partition count */ 121 n = mpart->map_count; 122 123 c = 'k'; 124 bytes = mpart->block_count; 125 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */ 126 if (bytes >= 1024) { 127 bytes >>= 10; 128 c = 'M'; 129 } 130 if (bytes >= 1024) { 131 bytes >>= 10; 132 c = 'G'; 133 } 134 135 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 136 mpart->type, 137 mpart->name, 138 mpart->block_count, 139 mpart->start_block, 140 bytes, c 141 ); 142 } 143 144 return; 145 } 146 147 148 /* 149 * Read Device Descriptor Block 150 */ 151 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p) 152 { 153 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)ddb_p) != 1) { 154 printf ("** Can't read Driver Desriptor Block **\n"); 155 return (-1); 156 } 157 158 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 159 #if 0 160 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n", 161 MAC_DRIVER_MAGIC, ddb_p->signature); 162 #endif 163 return (-1); 164 } 165 return (0); 166 } 167 168 /* 169 * Read Partition Descriptor Block 170 */ 171 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p) 172 { 173 int n = 1; 174 175 for (;;) { 176 /* 177 * We must always read the descritpor block for 178 * partition 1 first since this is the only way to 179 * know how many partitions we have. 180 */ 181 if (dev_desc->block_read (dev_desc->dev, n, 1, (ulong *)pdb_p) != 1) { 182 printf ("** Can't read Partition Map on %d:%d **\n", 183 dev_desc->dev, n); 184 return (-1); 185 } 186 187 if (pdb_p->signature != MAC_PARTITION_MAGIC) { 188 printf ("** Bad Signature on %d:%d: " 189 "expected 0x%04x, got 0x%04x\n", 190 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature); 191 return (-1); 192 } 193 194 if (n == part) 195 return (0); 196 197 if ((part < 1) || (part > pdb_p->map_count)) { 198 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n", 199 dev_desc->dev, part, 200 dev_desc->dev, 201 dev_desc->dev, pdb_p->map_count); 202 return (-1); 203 } 204 205 /* update partition count */ 206 n = part; 207 } 208 209 /* NOTREACHED */ 210 } 211 212 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info) 213 { 214 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 215 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 216 217 if (part_mac_read_ddb (dev_desc, ddesc)) { 218 return (-1); 219 } 220 221 info->blksz = ddesc->blk_size; 222 223 if (part_mac_read_pdb (dev_desc, part, mpart)) { 224 return (-1); 225 } 226 227 info->start = mpart->start_block; 228 info->size = mpart->block_count; 229 memcpy (info->type, mpart->type, sizeof(info->type)); 230 memcpy (info->name, mpart->name, sizeof(info->name)); 231 232 return (0); 233 } 234 235 #endif 236