3 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
5 * SPDX-License-Identifier: GPL-2.0+
12 #ifdef HAVE_BLOCK_DEVICE
14 /* #define ISO_PART_DEBUG */
17 #define PRINTF(fmt,args...) printf (fmt ,##args)
19 #define PRINTF(fmt,args...)
22 /* enable this if CDs are written with the PowerPC Platform ID */
23 #undef CHECK_FOR_POWERPC_PLATTFORM
24 #define CD_SECTSIZE 2048
26 static unsigned char tmpbuf[CD_SECTSIZE];
28 /* Convert char[4] in little endian format to the host format integer
30 static inline unsigned long le32_to_int(unsigned char *le32)
32 return ((le32[3] << 24) +
38 /* Convert char[2] in little endian format to the host format integer
40 static inline unsigned short le16_to_int(unsigned char *le16)
42 return ((le16[1] << 8) +
48 /* only boot records will be listed as valid partitions */
49 int get_partition_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)
64 /* the first sector (sector 0x10) must be a primary volume desc */
66 if (dev_desc->block_read(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->dev, 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->dev, part_num);
80 lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
81 ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
82 ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
83 ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
84 info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
85 PRINTF(" Lastsect:%08lx\n",lastsect);
86 for(i=blkaddr;i<lastsect;i++) {
87 PRINTF("Reading block %d\n", i);
88 if (dev_desc->block_read(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
90 if(ppr->desctype==0x00)
91 break; /* boot entry found */
92 if(ppr->desctype==0xff) {
94 printf ("** No valid boot catalog found on %d:%d **\n",
95 dev_desc->dev, part_num);
99 /* boot entry found */
100 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
102 printf ("** Wrong El Torito ident: %s on %d:%d **\n",
103 pbr->ident_str,dev_desc->dev, part_num);
106 bootaddr=le32_to_int(pbr->pointer);
107 PRINTF(" Boot Entry at: %08lX\n",bootaddr);
108 if (dev_desc->block_read(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
110 printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
111 bootaddr,dev_desc->dev, part_num);
115 chksumbuf = (unsigned short *)tmpbuf;
117 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
120 printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
121 dev_desc->dev, part_num);
124 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
126 printf ("** Key 0x55 0xAA error on %d:%d **\n",
127 dev_desc->dev, part_num);
130 #ifdef CHECK_FOR_POWERPC_PLATTFORM
131 if(pve->platform!=0x01) {
133 printf ("** No PowerPC platform CD on %d:%d **\n",
134 dev_desc->dev, part_num);
138 /* the validation entry seems to be ok, now search the "partition" */
141 strcpy((char *)info->type, "U-Boot");
142 switch(dev_desc->if_type) {
146 sprintf ((char *)info->name, "hd%c%d",
147 'a' + dev_desc->dev, part_num);
150 sprintf ((char *)info->name, "sd%c%d",
151 'a' + dev_desc->dev, part_num);
154 sprintf ((char *)info->name, "usbd%c%d",
155 'a' + dev_desc->dev, part_num);
158 sprintf ((char *)info->name, "docd%c%d",
159 'a' + dev_desc->dev, part_num);
162 sprintf ((char *)info->name, "xx%c%d",
163 'a' + dev_desc->dev, part_num);
166 /* the bootcatalog (including validation Entry) is limited to 2048Bytes
167 * (63 boot entries + validation entry) */
169 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
170 if ((pide->boot_ind==0x88) ||
171 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
172 if(entry_num==part_num) { /* part found */
175 entry_num++; /* count partitions Entries (boot and non bootables */
179 if ((pide->boot_ind==0x90) || /* Section Header Entry */
180 (pide->boot_ind==0x91) || /* Section Header Entry (last) */
181 (pide->boot_ind==0x44)) { /* Extension Indicator */
182 offset+=0x20; /* skip unused entries */
186 printf ("** Partition %d not found on device %d **\n",
187 part_num,dev_desc->dev);
191 /* if we reach this point entire sector has been
192 * searched w/o succsess */
194 printf ("** Partition %d not found on device %d **\n",
195 part_num,dev_desc->dev);
198 if(pide->boot_ind!=0x88) {
200 printf ("** Partition %d is not bootable on device %d **\n",
201 part_num,dev_desc->dev);
204 switch(pide->boot_media) {
205 case 0x00: /* no emulation */
206 info->size=le16_to_int(pide->sec_cnt)>>2;
208 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
209 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
210 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
211 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
212 default: info->size=0; break;
214 newblkaddr=le32_to_int(pide->rel_block_addr);
215 info->start=newblkaddr;
216 PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
220 static int get_partition_info_iso(struct blk_desc *dev_desc, int part_num,
221 disk_partition_t *info)
223 return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
226 static void print_part_iso(struct blk_desc *dev_desc)
228 disk_partition_t info;
230 if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
231 printf("** No boot partition found on device %d **\n",dev_desc->dev);
234 printf("Part Start Sect x Size Type\n");
237 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
238 i, info.start, info.size, info.blksz, info.type);
240 } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
243 static int test_part_iso(struct blk_desc *dev_desc)
245 disk_partition_t info;
247 return(get_partition_info_iso_verb(dev_desc,0,&info,0));
250 U_BOOT_PART_TYPE(iso) = {
252 .part_type = PART_TYPE_ISO,
253 .get_info = get_partition_info_iso,
254 .print = print_part_iso,
255 .test = test_part_iso,