3 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/unaligned.h>
13 #ifdef HAVE_BLOCK_DEVICE
15 /* #define ISO_PART_DEBUG */
18 #define PRINTF(fmt,args...) printf (fmt ,##args)
20 #define PRINTF(fmt,args...)
23 /* enable this if CDs are written with the PowerPC Platform ID */
24 #undef CHECK_FOR_POWERPC_PLATTFORM
25 #define CD_SECTSIZE 2048
27 static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
29 unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
30 lbaint_t blkcnt, void *buffer)
34 if (block_dev->blksz == 512) {
35 /* Convert from 2048 to 512 sector size */
40 ret = blk_dread(block_dev, start, blkcnt, buffer);
42 if (block_dev->blksz == 512)
48 /* only boot records will be listed as valid partitions */
49 int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num,
50 disk_partition_t *info, int verb)
52 int i,offset,entry_num;
53 unsigned short *chksumbuf;
54 unsigned short chksum;
55 unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
56 iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */
57 iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */
58 iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
59 iso_init_def_entry_t *pide;
61 if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
64 /* the first sector (sector 0x10) must be a primary volume desc */
66 if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
68 if(ppr->desctype!=0x01) {
70 printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
71 dev_desc->devnum, part_num);
74 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
76 printf ("** Wrong ISO Ident: %s on %d:%d **\n",
77 ppr->stand_ident, dev_desc->devnum, part_num);
80 lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE);
81 /* assuming same block size for all entries */
82 info->blksz = be16_to_cpu(ppr->secsize_BE);
83 PRINTF(" Lastsect:%08lx\n",lastsect);
84 for(i=blkaddr;i<lastsect;i++) {
85 PRINTF("Reading block %d\n", i);
86 if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
88 if(ppr->desctype==0x00)
89 break; /* boot entry found */
90 if(ppr->desctype==0xff) {
92 printf ("** No valid boot catalog found on %d:%d **\n",
93 dev_desc->devnum, part_num);
97 /* boot entry found */
98 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
100 printf ("** Wrong El Torito ident: %s on %d:%d **\n",
101 pbr->ident_str, dev_desc->devnum, part_num);
104 bootaddr = get_unaligned_le32(pbr->pointer);
105 PRINTF(" Boot Entry at: %08lX\n",bootaddr);
106 if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
108 printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
109 bootaddr, dev_desc->devnum, part_num);
113 chksumbuf = (unsigned short *)tmpbuf;
115 chksum += le16_to_cpu(chksumbuf[i]);
118 printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
119 dev_desc->devnum, part_num);
122 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
124 printf ("** Key 0x55 0xAA error on %d:%d **\n",
125 dev_desc->devnum, part_num);
128 #ifdef CHECK_FOR_POWERPC_PLATTFORM
129 if(pve->platform!=0x01) {
131 printf ("** No PowerPC platform CD on %d:%d **\n",
132 dev_desc->devnum, part_num);
136 /* the validation entry seems to be ok, now search the "partition" */
139 strcpy((char *)info->type, "U-Boot");
140 part_set_generic_name(dev_desc, part_num, (char *)info->name);
141 /* the bootcatalog (including validation Entry) is limited to 2048Bytes
142 * (63 boot entries + validation entry) */
144 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
145 if ((pide->boot_ind==0x88) ||
146 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
147 if(entry_num==part_num) { /* part found */
150 entry_num++; /* count partitions Entries (boot and non bootables */
154 if ((pide->boot_ind==0x90) || /* Section Header Entry */
155 (pide->boot_ind==0x91) || /* Section Header Entry (last) */
156 (pide->boot_ind==0x44)) { /* Extension Indicator */
157 offset+=0x20; /* skip unused entries */
161 printf ("** Partition %d not found on device %d **\n",
162 part_num, dev_desc->devnum);
166 /* if we reach this point entire sector has been
167 * searched w/o succsess */
169 printf ("** Partition %d not found on device %d **\n",
170 part_num, dev_desc->devnum);
173 if(pide->boot_ind!=0x88) {
175 printf("** Partition %d is not bootable on device %d **\n",
176 part_num, dev_desc->devnum);
179 switch(pide->boot_media) {
180 case 0x00: /* no emulation */
181 info->size = get_unaligned_le16(pide->sec_cnt)>>2;
183 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
184 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
185 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
186 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
187 default: info->size=0; break;
189 newblkaddr = get_unaligned_le32(pide->rel_block_addr);
190 info->start=newblkaddr;
192 if (dev_desc->blksz == 512) {
198 PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
202 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
203 disk_partition_t *info)
205 return part_get_info_iso_verb(dev_desc, part_num, info, 1);
208 static void part_print_iso(struct blk_desc *dev_desc)
210 disk_partition_t info;
213 if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) {
214 printf("** No boot partition found on device %d **\n",
218 printf("Part Start Sect x Size Type\n");
221 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
222 i, info.start, info.size, info.blksz, info.type);
224 } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
227 static int part_test_iso(struct blk_desc *dev_desc)
229 disk_partition_t info;
231 return part_get_info_iso_verb(dev_desc, 1, &info, 1);
234 U_BOOT_PART_TYPE(iso) = {
236 .part_type = PART_TYPE_ISO,
237 .max_entries = ISO_ENTRY_NUMBERS,
238 .get_info = part_get_info_iso,
239 .print = part_print_iso,
240 .test = part_test_iso,