]>
Commit | Line | Data |
---|---|---|
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 |