]> git.sur5r.net Git - u-boot/blob - disk/part_iso.c
disk/iso: Add Support for block sizes > 512 byte to ISO partition support
[u-boot] / disk / part_iso.c
1 /*
2  * (C) Copyright 2001
3  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23
24 #include <common.h>
25 #include <command.h>
26 #include "part_iso.h"
27
28 #ifdef HAVE_BLOCK_DEVICE
29
30 /* #define      ISO_PART_DEBUG */
31
32 #ifdef  ISO_PART_DEBUG
33 #define PRINTF(fmt,args...)     printf (fmt ,##args)
34 #else
35 #define PRINTF(fmt,args...)
36 #endif
37
38 /* enable this if CDs are written with the PowerPC Platform ID */
39 #undef CHECK_FOR_POWERPC_PLATTFORM
40 #define CD_SECTSIZE 2048
41
42 static unsigned char tmpbuf[CD_SECTSIZE];
43
44 /* Convert char[4] in little endian format to the host format integer
45  */
46 static inline unsigned long le32_to_int(unsigned char *le32)
47 {
48     return ((le32[3] << 24) +
49             (le32[2] << 16) +
50             (le32[1] << 8) +
51              le32[0]
52            );
53 }
54 /* Convert char[2] in little endian format to the host format integer
55  */
56 static inline unsigned short le16_to_int(unsigned char *le16)
57 {
58     return ((le16[1] << 8) +
59            le16[0]
60            );
61 }
62
63
64 /* only boot records will be listed as valid partitions */
65 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
66 {
67         int i,offset,entry_num;
68         unsigned short *chksumbuf;
69         unsigned short chksum;
70         unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
71         iso_boot_rec_t *pbr = (iso_boot_rec_t   *)tmpbuf; /* boot record */
72         iso_pri_rec_t *ppr = (iso_pri_rec_t     *)tmpbuf;       /* primary desc */
73         iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
74         iso_init_def_entry_t *pide;
75
76         if (dev_desc->blksz != CD_SECTSIZE)
77                 return -1;
78
79         /* the first sector (sector 0x10) must be a primary volume desc */
80         blkaddr=PVD_OFFSET;
81         if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
82         return (-1);
83         if(ppr->desctype!=0x01) {
84                 if(verb)
85                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
86                                 dev_desc->dev, part_num);
87                 return (-1);
88         }
89         if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
90                 if(verb)
91                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
92                                 ppr->stand_ident,dev_desc->dev, part_num);
93                 return (-1);
94         }
95         lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
96                   ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
97                   ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
98                   ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
99         info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
100         PRINTF(" Lastsect:%08lx\n",lastsect);
101         for(i=blkaddr;i<lastsect;i++) {
102                 PRINTF("Reading block %d\n", i);
103                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
104                 return (-1);
105                 if(ppr->desctype==0x00)
106                         break; /* boot entry found */
107                 if(ppr->desctype==0xff) {
108                         if(verb)
109                                 printf ("** No valid boot catalog found on %d:%d **\n",
110                                         dev_desc->dev, part_num);
111                         return (-1);
112                 }
113         }
114         /* boot entry found */
115         if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
116                 if(verb)
117                         printf ("** Wrong El Torito ident: %s on %d:%d **\n",
118                                 pbr->ident_str,dev_desc->dev, part_num);
119                 return (-1);
120         }
121         bootaddr=le32_to_int(pbr->pointer);
122         PRINTF(" Boot Entry at: %08lX\n",bootaddr);
123         if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
124                 if(verb)
125                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
126                                 bootaddr,dev_desc->dev, part_num);
127                 return (-1);
128         }
129         chksum=0;
130         chksumbuf = (unsigned short *)tmpbuf;
131         for(i=0;i<0x10;i++)
132                 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
133         if(chksum!=0) {
134                 if(verb)
135                         printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
136                                 dev_desc->dev, part_num);
137                 return (-1);
138         }
139         if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
140                 if(verb)
141                         printf ("** Key 0x55 0xAA error on %d:%d **\n",
142                                 dev_desc->dev, part_num);
143                 return(-1);
144         }
145 #ifdef CHECK_FOR_POWERPC_PLATTFORM
146         if(pve->platform!=0x01) {
147                 if(verb)
148                         printf ("** No PowerPC platform CD on %d:%d **\n",
149                                 dev_desc->dev, part_num);
150                 return(-1);
151         }
152 #endif
153         /* the validation entry seems to be ok, now search the "partition" */
154         entry_num=0;
155         offset=0x20;
156         sprintf ((char *)info->type, "U-Boot");
157         switch(dev_desc->if_type) {
158                 case IF_TYPE_IDE:
159                 case IF_TYPE_SATA:
160                 case IF_TYPE_ATAPI:
161                         sprintf ((char *)info->name, "hd%c%d",
162                                 'a' + dev_desc->dev, part_num);
163                         break;
164                 case IF_TYPE_SCSI:
165                         sprintf ((char *)info->name, "sd%c%d",
166                                 'a' + dev_desc->dev, part_num);
167                         break;
168                 case IF_TYPE_USB:
169                         sprintf ((char *)info->name, "usbd%c%d",
170                                 'a' + dev_desc->dev, part_num);
171                         break;
172                 case IF_TYPE_DOC:
173                         sprintf ((char *)info->name, "docd%c%d",
174                                 'a' + dev_desc->dev, part_num);
175                         break;
176                 default:
177                         sprintf ((char *)info->name, "xx%c%d",
178                                 'a' + dev_desc->dev, part_num);
179                         break;
180         }
181         /* the bootcatalog (including validation Entry) is limited to 2048Bytes
182          * (63 boot entries + validation entry) */
183          while(offset<2048) {
184                 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
185                 if ((pide->boot_ind==0x88) ||
186                     (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
187                         if(entry_num==part_num) { /* part found */
188                                 goto found;
189                         }
190                         entry_num++; /* count partitions Entries (boot and non bootables */
191                         offset+=0x20;
192                         continue;
193                 }
194                 if ((pide->boot_ind==0x90) ||   /* Section Header Entry */
195                     (pide->boot_ind==0x91) ||   /* Section Header Entry (last) */
196                     (pide->boot_ind==0x44)) {   /* Extension Indicator */
197                         offset+=0x20; /* skip unused entries */
198                 }
199                 else {
200                         if(verb)
201                                 printf ("** Partition %d not found on device %d **\n",
202                                         part_num,dev_desc->dev);
203                         return(-1);
204                 }
205         }
206         /* if we reach this point entire sector has been
207          * searched w/o succsess */
208         if(verb)
209                 printf ("** Partition %d not found on device %d **\n",
210                         part_num,dev_desc->dev);
211         return(-1);
212 found:
213         if(pide->boot_ind!=0x88) {
214                 if(verb)
215                         printf ("** Partition %d is not bootable on device %d **\n",
216                                 part_num,dev_desc->dev);
217                 return (-1);
218         }
219         switch(pide->boot_media) {
220                 case 0x00: /* no emulation */
221                         info->size=le16_to_int(pide->sec_cnt)>>2;
222                         break;
223                 case 0x01:      info->size=2400>>2; break; /* 1.2MByte Floppy */
224                 case 0x02:      info->size=2880>>2; break; /* 1.44MByte Floppy */
225                 case 0x03:      info->size=5760>>2; break; /* 2.88MByte Floppy */
226                 case 0x04:      info->size=2880>>2; break; /* dummy (HD Emulation) */
227                 default:        info->size=0; break;
228         }
229         newblkaddr=le32_to_int(pide->rel_block_addr);
230         info->start=newblkaddr;
231         PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
232         return 0;
233 }
234
235 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
236 {
237         return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
238 }
239
240
241 void print_part_iso(block_dev_desc_t * dev_desc)
242 {
243         disk_partition_t info;
244         int i;
245         if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
246                 printf("** No boot partition found on device %d **\n",dev_desc->dev);
247                 return;
248         }
249         printf("Part   Start     Sect x Size Type\n");
250         i=0;
251         do {
252                 printf (" %2d %8ld %8ld %6ld %.32s\n",
253                         i, info.start, info.size, info.blksz, info.type);
254                 i++;
255         } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
256 }
257
258 int test_part_iso (block_dev_desc_t *dev_desc)
259 {
260         disk_partition_t info;
261
262         return(get_partition_info_iso_verb(dev_desc,0,&info,0));
263 }
264
265 #endif