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, i, 1, 55 (ulong *)mpart) != 1) || 56 (mpart->signature != MAC_PARTITION_MAGIC) ) { 57 return (-1); 58 } 59 /* update partition count */ 60 n = mpart->map_count; 61 } 62 return (0); 63 } 64 65 66 void print_part_mac (block_dev_desc_t *dev_desc) 67 { 68 ulong i, n; 69 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 70 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 71 ldiv_t mb, gb; 72 73 if (part_mac_read_ddb (dev_desc, ddesc)) { 74 /* error reading Driver Desriptor Block, or no valid Signature */ 75 return; 76 } 77 78 n = ddesc->blk_count; 79 80 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 81 /* round to 1 digit */ 82 mb.rem *= 10 * ddesc->blk_size; 83 mb.rem += 512 * 1024; 84 mb.rem /= 1024 * 1024; 85 86 gb = ldiv(10 * mb.quot + mb.rem, 10240); 87 gb.rem += 512; 88 gb.rem /= 1024; 89 90 91 printf ("Block Size=%d, Number of Blocks=%d, " 92 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n" 93 "DeviceType=0x%x, DeviceId=0x%x\n\n" 94 " #: type name" 95 " length base (size)\n", 96 ddesc->blk_size, 97 ddesc->blk_count, 98 mb.quot, mb.rem, gb.quot, gb.rem, 99 ddesc->dev_type, ddesc->dev_id 100 ); 101 102 n = 1; /* assuming at least one partition */ 103 for (i=1; i<=n; ++i) { 104 ulong bytes; 105 char c; 106 107 printf ("%4ld: ", i); 108 if (dev_desc->block_read(dev_desc, i, 1, (ulong *)mpart) != 1) { 109 printf ("** Can't read Partition Map on %d:%ld **\n", 110 dev_desc->dev, i); 111 return; 112 } 113 114 if (mpart->signature != MAC_PARTITION_MAGIC) { 115 printf ("** Bad Signature on %d:%ld - " 116 "expected 0x%04x, got 0x%04x\n", 117 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature); 118 return; 119 } 120 121 /* update partition count */ 122 n = mpart->map_count; 123 124 c = 'k'; 125 bytes = mpart->block_count; 126 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */ 127 if (bytes >= 1024) { 128 bytes >>= 10; 129 c = 'M'; 130 } 131 if (bytes >= 1024) { 132 bytes >>= 10; 133 c = 'G'; 134 } 135 136 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 137 mpart->type, 138 mpart->name, 139 mpart->block_count, 140 mpart->start_block, 141 bytes, c 142 ); 143 } 144 145 return; 146 } 147 148 149 /* 150 * Read Device Descriptor Block 151 */ 152 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p) 153 { 154 if (dev_desc->block_read(dev_desc, 0, 1, (ulong *)ddb_p) != 1) { 155 printf ("** Can't read Driver Desriptor Block **\n"); 156 return (-1); 157 } 158 159 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 160 #if 0 161 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n", 162 MAC_DRIVER_MAGIC, ddb_p->signature); 163 #endif 164 return (-1); 165 } 166 return (0); 167 } 168 169 /* 170 * Read Partition Descriptor Block 171 */ 172 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p) 173 { 174 int n = 1; 175 176 for (;;) { 177 /* 178 * We must always read the descritpor block for 179 * partition 1 first since this is the only way to 180 * know how many partitions we have. 181 */ 182 if (dev_desc->block_read(dev_desc, n, 1, (ulong *)pdb_p) != 1) { 183 printf ("** Can't read Partition Map on %d:%d **\n", 184 dev_desc->dev, n); 185 return (-1); 186 } 187 188 if (pdb_p->signature != MAC_PARTITION_MAGIC) { 189 printf ("** Bad Signature on %d:%d: " 190 "expected 0x%04x, got 0x%04x\n", 191 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature); 192 return (-1); 193 } 194 195 if (n == part) 196 return (0); 197 198 if ((part < 1) || (part > pdb_p->map_count)) { 199 printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n", 200 dev_desc->dev, part, 201 dev_desc->dev, 202 dev_desc->dev, pdb_p->map_count); 203 return (-1); 204 } 205 206 /* update partition count */ 207 n = part; 208 } 209 210 /* NOTREACHED */ 211 } 212 213 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info) 214 { 215 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 216 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 217 218 if (part_mac_read_ddb (dev_desc, ddesc)) { 219 return (-1); 220 } 221 222 info->blksz = ddesc->blk_size; 223 224 if (part_mac_read_pdb (dev_desc, part, mpart)) { 225 return (-1); 226 } 227 228 info->start = mpart->start_block; 229 info->size = mpart->block_count; 230 memcpy (info->type, mpart->type, sizeof(info->type)); 231 memcpy (info->name, mpart->name, sizeof(info->name)); 232 233 return (0); 234 } 235 236 #endif 237