242 lines
6.7 KiB
C
242 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2001
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* Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
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*/
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#include <common.h>
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#include <blk.h>
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#include <command.h>
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#include <part.h>
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#include <asm/cache.h>
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#include <asm/unaligned.h>
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#include "part_iso.h"
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/* #define ISO_PART_DEBUG */
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#ifdef ISO_PART_DEBUG
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#define PRINTF(fmt,args...) printf (fmt ,##args)
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#else
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#define PRINTF(fmt,args...)
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#endif
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/* enable this if CDs are written with the PowerPC Platform ID */
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#undef CHECK_FOR_POWERPC_PLATTFORM
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#define CD_SECTSIZE 2048
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static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
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unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, void *buffer)
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{
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unsigned long ret;
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if (block_dev->blksz == 512) {
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/* Convert from 2048 to 512 sector size */
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start *= 4;
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blkcnt *= 4;
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}
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ret = blk_dread(block_dev, start, blkcnt, buffer);
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if (block_dev->blksz == 512)
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ret /= 4;
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return ret;
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}
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/* only boot records will be listed as valid partitions */
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int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num,
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struct disk_partition *info, int verb)
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{
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int i,offset,entry_num;
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unsigned short *chksumbuf;
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unsigned short chksum;
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unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
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iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */
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iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */
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iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
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iso_init_def_entry_t *pide;
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if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
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return -1;
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/* the first sector (sector 0x10) must be a primary volume desc */
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blkaddr=PVD_OFFSET;
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if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
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return -1;
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if(ppr->desctype!=0x01) {
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if(verb)
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printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
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dev_desc->devnum, part_num);
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return (-1);
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}
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if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
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if(verb)
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printf ("** Wrong ISO Ident: %s on %d:%d **\n",
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ppr->stand_ident, dev_desc->devnum, part_num);
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return (-1);
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}
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lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE);
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/* assuming same block size for all entries */
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info->blksz = be16_to_cpu(ppr->secsize_BE);
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PRINTF(" Lastsect:%08lx\n",lastsect);
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for(i=blkaddr;i<lastsect;i++) {
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PRINTF("Reading block %d\n", i);
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if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
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return -1;
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if(ppr->desctype==0x00)
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break; /* boot entry found */
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if(ppr->desctype==0xff) {
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if(verb)
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printf ("** No valid boot catalog found on %d:%d **\n",
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dev_desc->devnum, part_num);
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return (-1);
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}
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}
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/* boot entry found */
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if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
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if(verb)
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printf ("** Wrong El Torito ident: %s on %d:%d **\n",
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pbr->ident_str, dev_desc->devnum, part_num);
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return (-1);
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}
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bootaddr = get_unaligned_le32(pbr->pointer);
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PRINTF(" Boot Entry at: %08lX\n",bootaddr);
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if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
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if(verb)
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printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
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bootaddr, dev_desc->devnum, part_num);
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return (-1);
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}
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chksum=0;
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chksumbuf = (unsigned short *)tmpbuf;
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for(i=0;i<0x10;i++)
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chksum += le16_to_cpu(chksumbuf[i]);
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if(chksum!=0) {
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if(verb)
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printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
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dev_desc->devnum, part_num);
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return (-1);
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}
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if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
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if(verb)
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printf ("** Key 0x55 0xAA error on %d:%d **\n",
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dev_desc->devnum, part_num);
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return(-1);
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}
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#ifdef CHECK_FOR_POWERPC_PLATTFORM
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if(pve->platform!=0x01) {
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if(verb)
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printf ("** No PowerPC platform CD on %d:%d **\n",
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dev_desc->devnum, part_num);
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return(-1);
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}
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#endif
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/* the validation entry seems to be ok, now search the "partition" */
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entry_num=1;
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offset=0x20;
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strcpy((char *)info->type, "U-Boot");
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part_set_generic_name(dev_desc, part_num, (char *)info->name);
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/* the bootcatalog (including validation Entry) is limited to 2048Bytes
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* (63 boot entries + validation entry) */
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while(offset<2048) {
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pide=(iso_init_def_entry_t *)&tmpbuf[offset];
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if ((pide->boot_ind==0x88) ||
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(pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
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if(entry_num==part_num) { /* part found */
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goto found;
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}
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entry_num++; /* count partitions Entries (boot and non bootables */
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offset+=0x20;
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continue;
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}
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if ((pide->boot_ind==0x90) || /* Section Header Entry */
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(pide->boot_ind==0x91) || /* Section Header Entry (last) */
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(pide->boot_ind==0x44)) { /* Extension Indicator */
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offset+=0x20; /* skip unused entries */
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}
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else {
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if(verb)
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printf ("** Partition %d not found on device %d **\n",
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part_num, dev_desc->devnum);
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return(-1);
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}
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}
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/* if we reach this point entire sector has been
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* searched w/o succsess */
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if(verb)
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printf ("** Partition %d not found on device %d **\n",
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part_num, dev_desc->devnum);
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return(-1);
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found:
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if(pide->boot_ind!=0x88) {
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if(verb)
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printf("** Partition %d is not bootable on device %d **\n",
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part_num, dev_desc->devnum);
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return (-1);
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}
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switch(pide->boot_media) {
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case 0x00: /* no emulation */
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info->size = get_unaligned_le16(pide->sec_cnt)>>2;
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break;
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case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
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case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
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case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
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case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
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default: info->size=0; break;
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}
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newblkaddr = get_unaligned_le32(pide->rel_block_addr);
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info->start=newblkaddr;
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if (dev_desc->blksz == 512) {
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info->size *= 4;
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info->start *= 4;
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info->blksz = 512;
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}
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PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
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return 0;
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}
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static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
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struct disk_partition *info)
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{
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return part_get_info_iso_verb(dev_desc, part_num, info, 0);
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}
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static void part_print_iso(struct blk_desc *dev_desc)
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{
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struct disk_partition info;
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int i;
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if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) {
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printf("** No boot partition found on device %d **\n",
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dev_desc->devnum);
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return;
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}
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printf("Part Start Sect x Size Type\n");
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i=1;
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do {
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printf(" %2d %8" LBAFlength "u %8" LBAFlength "u %6ld %.32s\n",
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i, info.start, info.size, info.blksz, info.type);
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i++;
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} while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
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}
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static int part_test_iso(struct blk_desc *dev_desc)
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{
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struct disk_partition info;
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return part_get_info_iso_verb(dev_desc, 1, &info, 0);
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}
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U_BOOT_PART_TYPE(iso) = {
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.name = "ISO",
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.part_type = PART_TYPE_ISO,
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.max_entries = ISO_ENTRY_NUMBERS,
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.get_info = part_get_info_iso,
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.print = part_print_iso,
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.test = part_test_iso,
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};
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