]>
git.ipfire.org Git - thirdparty/u-boot.git/blob - disk/part_iso.c
1 // SPDX-License-Identifier: GPL-2.0+
4 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
9 #include <asm/unaligned.h>
12 #ifdef CONFIG_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
] __aligned(ARCH_DMA_MINALIGN
);
28 unsigned long iso_dread(struct blk_desc
*block_dev
, lbaint_t start
,
29 lbaint_t blkcnt
, void *buffer
)
33 if (block_dev
->blksz
== 512) {
34 /* Convert from 2048 to 512 sector size */
39 ret
= blk_dread(block_dev
, start
, blkcnt
, buffer
);
41 if (block_dev
->blksz
== 512)
47 /* only boot records will be listed as valid partitions */
48 int part_get_info_iso_verb(struct blk_desc
*dev_desc
, int part_num
,
49 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
) && (dev_desc
->blksz
!= 512))
63 /* the first sector (sector 0x10) must be a primary volume desc */
65 if (iso_dread(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
->devnum
, 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
->devnum
, part_num
);
79 lastsect
= le32_to_cpu(ppr
->firstsek_LEpathtab1_LE
);
80 /* assuming same block size for all entries */
81 info
->blksz
= be16_to_cpu(ppr
->secsize_BE
);
82 PRINTF(" Lastsect:%08lx\n",lastsect
);
83 for(i
=blkaddr
;i
<lastsect
;i
++) {
84 PRINTF("Reading block %d\n", i
);
85 if (iso_dread(dev_desc
, i
, 1, (ulong
*)tmpbuf
) != 1)
87 if(ppr
->desctype
==0x00)
88 break; /* boot entry found */
89 if(ppr
->desctype
==0xff) {
91 printf ("** No valid boot catalog found on %d:%d **\n",
92 dev_desc
->devnum
, part_num
);
96 /* boot entry found */
97 if(strncmp(pbr
->ident_str
,"EL TORITO SPECIFICATION",23)!=0) {
99 printf ("** Wrong El Torito ident: %s on %d:%d **\n",
100 pbr
->ident_str
, dev_desc
->devnum
, part_num
);
103 bootaddr
= get_unaligned_le32(pbr
->pointer
);
104 PRINTF(" Boot Entry at: %08lX\n",bootaddr
);
105 if (iso_dread(dev_desc
, bootaddr
, 1, (ulong
*)tmpbuf
) != 1) {
107 printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
108 bootaddr
, dev_desc
->devnum
, part_num
);
112 chksumbuf
= (unsigned short *)tmpbuf
;
114 chksum
+= le16_to_cpu(chksumbuf
[i
]);
117 printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
118 dev_desc
->devnum
, part_num
);
121 if((pve
->key
[0]!=0x55)||(pve
->key
[1]!=0xAA)) {
123 printf ("** Key 0x55 0xAA error on %d:%d **\n",
124 dev_desc
->devnum
, part_num
);
127 #ifdef CHECK_FOR_POWERPC_PLATTFORM
128 if(pve
->platform
!=0x01) {
130 printf ("** No PowerPC platform CD on %d:%d **\n",
131 dev_desc
->devnum
, part_num
);
135 /* the validation entry seems to be ok, now search the "partition" */
138 strcpy((char *)info
->type
, "U-Boot");
139 part_set_generic_name(dev_desc
, part_num
, (char *)info
->name
);
140 /* the bootcatalog (including validation Entry) is limited to 2048Bytes
141 * (63 boot entries + validation entry) */
143 pide
=(iso_init_def_entry_t
*)&tmpbuf
[offset
];
144 if ((pide
->boot_ind
==0x88) ||
145 (pide
->boot_ind
==0x00)) { /* Header Id for default Sections Entries */
146 if(entry_num
==part_num
) { /* part found */
149 entry_num
++; /* count partitions Entries (boot and non bootables */
153 if ((pide
->boot_ind
==0x90) || /* Section Header Entry */
154 (pide
->boot_ind
==0x91) || /* Section Header Entry (last) */
155 (pide
->boot_ind
==0x44)) { /* Extension Indicator */
156 offset
+=0x20; /* skip unused entries */
160 printf ("** Partition %d not found on device %d **\n",
161 part_num
, dev_desc
->devnum
);
165 /* if we reach this point entire sector has been
166 * searched w/o succsess */
168 printf ("** Partition %d not found on device %d **\n",
169 part_num
, dev_desc
->devnum
);
172 if(pide
->boot_ind
!=0x88) {
174 printf("** Partition %d is not bootable on device %d **\n",
175 part_num
, dev_desc
->devnum
);
178 switch(pide
->boot_media
) {
179 case 0x00: /* no emulation */
180 info
->size
= get_unaligned_le16(pide
->sec_cnt
)>>2;
182 case 0x01: info
->size
=2400>>2; break; /* 1.2MByte Floppy */
183 case 0x02: info
->size
=2880>>2; break; /* 1.44MByte Floppy */
184 case 0x03: info
->size
=5760>>2; break; /* 2.88MByte Floppy */
185 case 0x04: info
->size
=2880>>2; break; /* dummy (HD Emulation) */
186 default: info
->size
=0; break;
188 newblkaddr
= get_unaligned_le32(pide
->rel_block_addr
);
189 info
->start
=newblkaddr
;
191 if (dev_desc
->blksz
== 512) {
197 PRINTF(" part %d found @ %lx size %lx\n",part_num
,info
->start
,info
->size
);
201 static int part_get_info_iso(struct blk_desc
*dev_desc
, int part_num
,
202 disk_partition_t
*info
)
204 return part_get_info_iso_verb(dev_desc
, part_num
, info
, 0);
207 static void part_print_iso(struct blk_desc
*dev_desc
)
209 disk_partition_t info
;
212 if (part_get_info_iso_verb(dev_desc
, 1, &info
, 0) == -1) {
213 printf("** No boot partition found on device %d **\n",
217 printf("Part Start Sect x Size Type\n");
220 printf(" %2d " LBAFU
" " LBAFU
" %6ld %.32s\n",
221 i
, info
.start
, info
.size
, info
.blksz
, info
.type
);
223 } while (part_get_info_iso_verb(dev_desc
, i
, &info
, 0) != -1);
226 static int part_test_iso(struct blk_desc
*dev_desc
)
228 disk_partition_t info
;
230 return part_get_info_iso_verb(dev_desc
, 1, &info
, 0);
233 U_BOOT_PART_TYPE(iso
) = {
235 .part_type
= PART_TYPE_ISO
,
236 .max_entries
= ISO_ENTRY_NUMBERS
,
237 .get_info
= part_get_info_iso
,
238 .print
= part_print_iso
,
239 .test
= part_test_iso
,