]> git.sur5r.net Git - u-boot/blob - disk/part_iso.c
Merge git://git.denx.de/u-boot-x86
[u-boot] / disk / part_iso.c
1 /*
2  * (C) Copyright 2001
3  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <command.h>
10 #include <asm/unaligned.h>
11 #include "part_iso.h"
12
13 #ifdef HAVE_BLOCK_DEVICE
14
15 /* #define      ISO_PART_DEBUG */
16
17 #ifdef  ISO_PART_DEBUG
18 #define PRINTF(fmt,args...)     printf (fmt ,##args)
19 #else
20 #define PRINTF(fmt,args...)
21 #endif
22
23 /* enable this if CDs are written with the PowerPC Platform ID */
24 #undef CHECK_FOR_POWERPC_PLATTFORM
25 #define CD_SECTSIZE 2048
26
27 static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
28
29 unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
30                         lbaint_t blkcnt, void *buffer)
31 {
32         unsigned long ret;
33
34         if (block_dev->blksz == 512) {
35                 /* Convert from 2048 to 512 sector size */
36                 start *= 4;
37                 blkcnt *= 4;
38         }
39
40         ret = blk_dread(block_dev, start, blkcnt, buffer);
41
42         if (block_dev->blksz == 512)
43                 ret /= 4;
44
45         return ret;
46 }
47
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)
51 {
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;
60
61         if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
62                 return -1;
63
64         /* the first sector (sector 0x10) must be a primary volume desc */
65         blkaddr=PVD_OFFSET;
66         if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
67                 return -1;
68         if(ppr->desctype!=0x01) {
69                 if(verb)
70                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
71                                 dev_desc->devnum, part_num);
72                 return (-1);
73         }
74         if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
75                 if(verb)
76                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
77                                 ppr->stand_ident, dev_desc->devnum, part_num);
78                 return (-1);
79         }
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)
87                         return -1;
88                 if(ppr->desctype==0x00)
89                         break; /* boot entry found */
90                 if(ppr->desctype==0xff) {
91                         if(verb)
92                                 printf ("** No valid boot catalog found on %d:%d **\n",
93                                         dev_desc->devnum, part_num);
94                         return (-1);
95                 }
96         }
97         /* boot entry found */
98         if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
99                 if(verb)
100                         printf ("** Wrong El Torito ident: %s on %d:%d **\n",
101                                 pbr->ident_str, dev_desc->devnum, part_num);
102                 return (-1);
103         }
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) {
107                 if(verb)
108                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
109                                 bootaddr, dev_desc->devnum, part_num);
110                 return (-1);
111         }
112         chksum=0;
113         chksumbuf = (unsigned short *)tmpbuf;
114         for(i=0;i<0x10;i++)
115                 chksum += le16_to_cpu(chksumbuf[i]);
116         if(chksum!=0) {
117                 if(verb)
118                         printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
119                                dev_desc->devnum, part_num);
120                 return (-1);
121         }
122         if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
123                 if(verb)
124                         printf ("** Key 0x55 0xAA error on %d:%d **\n",
125                                 dev_desc->devnum, part_num);
126                 return(-1);
127         }
128 #ifdef CHECK_FOR_POWERPC_PLATTFORM
129         if(pve->platform!=0x01) {
130                 if(verb)
131                         printf ("** No PowerPC platform CD on %d:%d **\n",
132                                 dev_desc->devnum, part_num);
133                 return(-1);
134         }
135 #endif
136         /* the validation entry seems to be ok, now search the "partition" */
137         entry_num=1;
138         offset=0x20;
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) */
143          while(offset<2048) {
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 */
148                                 goto found;
149                         }
150                         entry_num++; /* count partitions Entries (boot and non bootables */
151                         offset+=0x20;
152                         continue;
153                 }
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 */
158                 }
159                 else {
160                         if(verb)
161                                 printf ("** Partition %d not found on device %d **\n",
162                                         part_num, dev_desc->devnum);
163                         return(-1);
164                 }
165         }
166         /* if we reach this point entire sector has been
167          * searched w/o succsess */
168         if(verb)
169                 printf ("** Partition %d not found on device %d **\n",
170                         part_num, dev_desc->devnum);
171         return(-1);
172 found:
173         if(pide->boot_ind!=0x88) {
174                 if(verb)
175                         printf("** Partition %d is not bootable on device %d **\n",
176                                part_num, dev_desc->devnum);
177                 return (-1);
178         }
179         switch(pide->boot_media) {
180                 case 0x00: /* no emulation */
181                         info->size = get_unaligned_le16(pide->sec_cnt)>>2;
182                         break;
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;
188         }
189         newblkaddr = get_unaligned_le32(pide->rel_block_addr);
190         info->start=newblkaddr;
191
192         if (dev_desc->blksz == 512) {
193                 info->size *= 4;
194                 info->start *= 4;
195                 info->blksz = 512;
196         }
197
198         PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
199         return 0;
200 }
201
202 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
203                                   disk_partition_t *info)
204 {
205         return part_get_info_iso_verb(dev_desc, part_num, info, 1);
206 }
207
208 static void part_print_iso(struct blk_desc *dev_desc)
209 {
210         disk_partition_t info;
211         int i;
212
213         if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) {
214                 printf("** No boot partition found on device %d **\n",
215                        dev_desc->devnum);
216                 return;
217         }
218         printf("Part   Start     Sect x Size Type\n");
219         i=1;
220         do {
221                 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
222                        i, info.start, info.size, info.blksz, info.type);
223                 i++;
224         } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
225 }
226
227 static int part_test_iso(struct blk_desc *dev_desc)
228 {
229         disk_partition_t info;
230
231         return part_get_info_iso_verb(dev_desc, 1, &info, 1);
232 }
233
234 U_BOOT_PART_TYPE(iso) = {
235         .name           = "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,
241 };
242 #endif