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(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 test_part_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 /* error reading Driver Desriptor Block, or no valid Signature */ 51 return (-1); 52 } 53 54 n = 1; /* assuming at least one partition */ 55 for (i=1; i<=n; ++i) { 56 if ((dev_desc->block_read(dev_desc, i, 1, 57 (ulong *)mpart) != 1) || 58 (mpart->signature != MAC_PARTITION_MAGIC) ) { 59 return (-1); 60 } 61 /* update partition count */ 62 n = mpart->map_count; 63 } 64 return (0); 65 } 66 67 static void print_part_mac(struct blk_desc *dev_desc) 68 { 69 ulong i, n; 70 ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1); 71 ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1); 72 ldiv_t mb, gb; 73 74 if (part_mac_read_ddb (dev_desc, ddesc)) { 75 /* error reading Driver Desriptor Block, or no valid Signature */ 76 return; 77 } 78 79 n = ddesc->blk_count; 80 81 mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */ 82 /* round to 1 digit */ 83 mb.rem *= 10 * ddesc->blk_size; 84 mb.rem += 512 * 1024; 85 mb.rem /= 1024 * 1024; 86 87 gb = ldiv(10 * mb.quot + mb.rem, 10240); 88 gb.rem += 512; 89 gb.rem /= 1024; 90 91 92 printf ("Block Size=%d, Number of Blocks=%d, " 93 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n" 94 "DeviceType=0x%x, DeviceId=0x%x\n\n" 95 " #: type name" 96 " length base (size)\n", 97 ddesc->blk_size, 98 ddesc->blk_count, 99 mb.quot, mb.rem, gb.quot, gb.rem, 100 ddesc->dev_type, ddesc->dev_id 101 ); 102 103 n = 1; /* assuming at least one partition */ 104 for (i=1; i<=n; ++i) { 105 ulong bytes; 106 char c; 107 108 printf ("%4ld: ", i); 109 if (dev_desc->block_read(dev_desc, i, 1, (ulong *)mpart) != 1) { 110 printf ("** Can't read Partition Map on %d:%ld **\n", 111 dev_desc->dev, i); 112 return; 113 } 114 115 if (mpart->signature != MAC_PARTITION_MAGIC) { 116 printf ("** Bad Signature on %d:%ld - " 117 "expected 0x%04x, got 0x%04x\n", 118 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart->signature); 119 return; 120 } 121 122 /* update partition count */ 123 n = mpart->map_count; 124 125 c = 'k'; 126 bytes = mpart->block_count; 127 bytes /= (1024 / ddesc->blk_size); /* kB; assumes blk_size == 512 */ 128 if (bytes >= 1024) { 129 bytes >>= 10; 130 c = 'M'; 131 } 132 if (bytes >= 1024) { 133 bytes >>= 10; 134 c = 'G'; 135 } 136 137 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n", 138 mpart->type, 139 mpart->name, 140 mpart->block_count, 141 mpart->start_block, 142 bytes, c 143 ); 144 } 145 146 return; 147 } 148 149 150 /* 151 * Read Device Descriptor Block 152 */ 153 static int part_mac_read_ddb(struct blk_desc *dev_desc, 154 mac_driver_desc_t *ddb_p) 155 { 156 if (dev_desc->block_read(dev_desc, 0, 1, (ulong *)ddb_p) != 1) { 157 printf ("** Can't read Driver Desriptor Block **\n"); 158 return (-1); 159 } 160 161 if (ddb_p->signature != MAC_DRIVER_MAGIC) { 162 #if 0 163 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n", 164 MAC_DRIVER_MAGIC, ddb_p->signature); 165 #endif 166 return (-1); 167 } 168 return (0); 169 } 170 171 /* 172 * Read Partition Descriptor Block 173 */ 174 static 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 (dev_desc->block_read(dev_desc, n, 1, (ulong *)pdb_p) != 1) { 186 printf ("** Can't read Partition Map on %d:%d **\n", 187 dev_desc->dev, n); 188 return (-1); 189 } 190 191 if (pdb_p->signature != MAC_PARTITION_MAGIC) { 192 printf ("** Bad Signature on %d:%d: " 193 "expected 0x%04x, got 0x%04x\n", 194 dev_desc->dev, n, MAC_PARTITION_MAGIC, 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->dev, part, 204 dev_desc->dev, 205 dev_desc->dev, pdb_p->map_count); 206 return (-1); 207 } 208 209 /* update partition count */ 210 n = part; 211 } 212 213 /* NOTREACHED */ 214 } 215 216 static 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 } 239 240 U_BOOT_PART_TYPE(mac) = { 241 .name = "MAC", 242 .part_type = PART_TYPE_MAC, 243 .get_info = part_get_info_mac, 244 .print = print_part_mac, 245 .test = test_part_mac, 246 }; 247 #endif 248