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(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
51 int i,offset,entry_num;
52 unsigned short *chksumbuf;
53 unsigned short chksum;
54 unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
55 iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */
56 iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */
57 iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
58 iso_init_def_entry_t *pide;
60 if (dev_desc->blksz != CD_SECTSIZE)
63 /* the first sector (sector 0x10) must be a primary volume desc */
65 if (dev_desc->block_read(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
67 if(ppr->desctype!=0x01) {
69 printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
70 dev_desc->dev, part_num);
73 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
75 printf ("** Wrong ISO Ident: %s on %d:%d **\n",
76 ppr->stand_ident,dev_desc->dev, part_num);
79 lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
80 ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
81 ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
82 ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
83 info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
84 PRINTF(" Lastsect:%08lx\n",lastsect);
85 for(i=blkaddr;i<lastsect;i++) {
86 PRINTF("Reading block %d\n", i);
87 if (dev_desc->block_read(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
89 if(ppr->desctype==0x00)
90 break; /* boot entry found */
91 if(ppr->desctype==0xff) {
93 printf ("** No valid boot catalog found on %d:%d **\n",
94 dev_desc->dev, part_num);
98 /* boot entry found */
99 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
101 printf ("** Wrong El Torito ident: %s on %d:%d **\n",
102 pbr->ident_str,dev_desc->dev, part_num);
105 bootaddr=le32_to_int(pbr->pointer);
106 PRINTF(" Boot Entry at: %08lX\n",bootaddr);
107 if (dev_desc->block_read(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
109 printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
110 bootaddr,dev_desc->dev, part_num);
114 chksumbuf = (unsigned short *)tmpbuf;
116 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
119 printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
120 dev_desc->dev, part_num);
123 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
125 printf ("** Key 0x55 0xAA error on %d:%d **\n",
126 dev_desc->dev, part_num);
129 #ifdef CHECK_FOR_POWERPC_PLATTFORM
130 if(pve->platform!=0x01) {
132 printf ("** No PowerPC platform CD on %d:%d **\n",
133 dev_desc->dev, part_num);
137 /* the validation entry seems to be ok, now search the "partition" */
140 sprintf ((char *)info->type, "U-Boot");
141 switch(dev_desc->if_type) {
145 sprintf ((char *)info->name, "hd%c%d",
146 'a' + dev_desc->dev, part_num);
149 sprintf ((char *)info->name, "sd%c%d",
150 'a' + dev_desc->dev, part_num);
153 sprintf ((char *)info->name, "usbd%c%d",
154 'a' + dev_desc->dev, part_num);
157 sprintf ((char *)info->name, "docd%c%d",
158 'a' + dev_desc->dev, part_num);
161 sprintf ((char *)info->name, "xx%c%d",
162 'a' + dev_desc->dev, part_num);
165 /* the bootcatalog (including validation Entry) is limited to 2048Bytes
166 * (63 boot entries + validation entry) */
168 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
169 if ((pide->boot_ind==0x88) ||
170 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
171 if(entry_num==part_num) { /* part found */
174 entry_num++; /* count partitions Entries (boot and non bootables */
178 if ((pide->boot_ind==0x90) || /* Section Header Entry */
179 (pide->boot_ind==0x91) || /* Section Header Entry (last) */
180 (pide->boot_ind==0x44)) { /* Extension Indicator */
181 offset+=0x20; /* skip unused entries */
185 printf ("** Partition %d not found on device %d **\n",
186 part_num,dev_desc->dev);
190 /* if we reach this point entire sector has been
191 * searched w/o succsess */
193 printf ("** Partition %d not found on device %d **\n",
194 part_num,dev_desc->dev);
197 if(pide->boot_ind!=0x88) {
199 printf ("** Partition %d is not bootable on device %d **\n",
200 part_num,dev_desc->dev);
203 switch(pide->boot_media) {
204 case 0x00: /* no emulation */
205 info->size=le16_to_int(pide->sec_cnt)>>2;
207 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
208 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
209 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
210 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
211 default: info->size=0; break;
213 newblkaddr=le32_to_int(pide->rel_block_addr);
214 info->start=newblkaddr;
215 PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
219 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
221 return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
225 void print_part_iso(block_dev_desc_t * dev_desc)
227 disk_partition_t info;
229 if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
230 printf("** No boot partition found on device %d **\n",dev_desc->dev);
233 printf("Part Start Sect x Size Type\n");
236 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
237 i, info.start, info.size, info.blksz, info.type);
239 } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
242 int test_part_iso (block_dev_desc_t *dev_desc)
244 disk_partition_t info;
246 return(get_partition_info_iso_verb(dev_desc,0,&info,0));