Initial revision

1 files changed, 257 insertions, 0 deletions

diff --git a/disk/part_iso.c b/disk/part_iso.c
new file mode 100644
index 0000000..a98539d
--- /dev/null
+++ b/disk/part_iso.c
@@ -0,0 +1,257 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <cmd_disk.h>
+#include "part_iso.h"
+
+#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_ISO_PARTITION)
+
+#undef	ISO_PART_DEBUG
+
+#ifdef	ISO_PART_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+/* enable this if CDs are written with the PowerPC Platform ID */
+#undef CHECK_FOR_POWERPC_PLATTFORM
+#define CD_SECTSIZE 2048
+
+static unsigned char tmpbuf[CD_SECTSIZE];
+
+/* Convert char[4] in little endian format to the host format integer
+ */
+static inline unsigned long le32_to_int(unsigned char *le32)
+{
+    return ((le32[3] << 24) +
+	    (le32[2] << 16) +
+	    (le32[1] << 8) +
+	     le32[0]
+	   );
+}
+/* Convert char[2] in little endian format to the host format integer
+ */
+static inline unsigned short le16_to_int(unsigned char *le16)
+{
+    return ((le16[1] << 8) +
+	   le16[0]
+	   );
+}
+
+
+/* only boot records will be listed as valid partitions */
+int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
+{
+	int i,offset,entry_num;
+	unsigned short *chksumbuf;
+	unsigned short chksum;
+	unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
+	iso_boot_rec_t *pbr = (iso_boot_rec_t	*)tmpbuf; /* boot record */
+	iso_pri_rec_t *ppr = (iso_pri_rec_t	*)tmpbuf;	/* primary desc */
+	iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
+	iso_init_def_entry_t *pide;
+
+	/* the first sector (sector 0x10) must be a primary volume desc */
+	blkaddr=PVD_OFFSET;
+	if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
+   	return (-1);
+	if(ppr->desctype!=0x01) {
+		if(verb)
+			printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
+				dev_desc->dev, part_num);
+		return (-1);
+	}
+	if(strncmp(ppr->stand_ident,"CD001",5)!=0) {
+		if(verb)
+			printf ("** Wrong ISO Ident: %s on %d:%d **\n",
+				ppr->stand_ident,dev_desc->dev, part_num);
+		return (-1);
+	}
+	lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
+		  ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
+		  ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
+		  ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
+	info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
+	PRINTF(" Lastsect:%08lx\n",lastsect);
+	for(i=blkaddr;i<lastsect;i++) {
+		if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
+  	 	return (-1);
+		if(ppr->desctype==0x00)
+			break; /* boot entry found */
+		if(ppr->desctype==0xff) {
+			if(verb)
+				printf ("** No valid boot catalog found on %d:%d **\n",
+					dev_desc->dev, part_num);
+			return (-1);
+		}
+	}
+ 	/* boot entry found */
+	if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
+		if(verb)
+			printf ("** Wrong El Torito ident: %s on %d:%d **\n",
+				pbr->ident_str,dev_desc->dev, part_num);
+		return (-1);
+	}
+	bootaddr=le32_to_int(pbr->pointer);
+	PRINTF(" Boot Entry at: %08lX\n",bootaddr);
+	if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
+		if(verb)
+			printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
+				bootaddr,dev_desc->dev, part_num);
+		return (-1);
+	}
+	chksum=0;
+	chksumbuf = (unsigned short *)tmpbuf;
+	for(i=0;i<0x10;i++)
+		chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
+	if(chksum!=0) {
+		if(verb)
+			printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
+				dev_desc->dev, part_num);
+		return (-1);
+	}
+	if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
+		if(verb)
+			printf ("** Key 0x55 0xAA error on %d:%d **\n",
+				dev_desc->dev, part_num);
+		return(-1);
+	}
+#ifdef CHECK_FOR_POWERPC_PLATTFORM
+	if(pve->platform!=0x01) {
+		if(verb)
+			printf ("** No PowerPC platform CD on %d:%d **\n",
+				dev_desc->dev, part_num);
+		return(-1);
+	}
+#endif
+	/* the validation entry seems to be ok, now search the "partition" */
+	entry_num=0;
+	offset=0x20;
+	sprintf (info->type, "U-Boot");
+	switch(dev_desc->if_type) {
+		case IF_TYPE_IDE:
+		case IF_TYPE_ATAPI:
+			sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
+			break;
+		case IF_TYPE_SCSI:
+			sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
+			break;
+		case IF_TYPE_USB:
+			sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
+			break;
+		case IF_TYPE_DOC:
+			sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
+			break;
+		default:
+			sprintf (info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
+			break;
+	}
+	/* the bootcatalog (including validation Entry) is limited to 2048Bytes
+	 * (63 boot entries + validation entry) */
+	 while(offset<2048) {
+		pide=(iso_init_def_entry_t *)&tmpbuf[offset];
+		if ((pide->boot_ind==0x88) ||
+		    (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
+			if(entry_num==part_num) { /* part found */
+				goto found;
+			}
+			entry_num++; /* count partitions Entries (boot and non bootables */
+			offset+=0x20;
+			continue;
+		}
+		if ((pide->boot_ind==0x90) ||	/* Section Header Entry */
+		    (pide->boot_ind==0x91) ||	/* Section Header Entry (last) */
+		    (pide->boot_ind==0x44)) {	/* Extension Indicator */
+			offset+=0x20; /* skip unused entries */
+		}
+		else {
+			if(verb)
+				printf ("** Partition %d not found on device %d **\n",
+					part_num,dev_desc->dev);
+			return(-1);
+		}
+	}
+	/* if we reach this point entire sector has been
+	 * searched w/o succsess */
+	if(verb)
+		printf ("** Partition %d not found on device %d **\n",
+			part_num,dev_desc->dev);
+	return(-1);
+found:
+	if(pide->boot_ind!=0x88) {
+		if(verb)
+			printf ("** Partition %d is not bootable on device %d **\n",
+				part_num,dev_desc->dev);
+		return (-1);
+	}
+	switch(pide->boot_media) {
+		case 0x00: /* no emulation */
+			info->size=le16_to_int(pide->sec_cnt)>>2;
+			break;
+		case 0x01:	info->size=2400>>2; break; /* 1.2MByte Floppy */
+		case 0x02:	info->size=2880>>2; break; /* 1.44MByte Floppy */
+		case 0x03:	info->size=5760>>2; break; /* 2.88MByte Floppy */
+		case 0x04:	info->size=2880>>2; break; /* dummy (HD Emulation) */
+		default:	info->size=0; break;
+	}
+	newblkaddr=le32_to_int(pide->rel_block_addr);
+	info->start=newblkaddr;
+	PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
+	return 0;
+}
+
+int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
+{
+	return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
+}
+
+
+
+void print_part_iso(block_dev_desc_t * dev_desc)
+{
+	disk_partition_t info;
+	int i;
+	if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
+		printf("** No boot partition found on device %d **\n",dev_desc->dev);
+		return;
+	}
+	printf("Part   Start     Sect x Size Type\n");
+	i=0;
+	do {
+		printf (" %2d %8ld %8ld %6ld %.32s\n",
+			i, info.start, info.size, info.blksz, info.type);
+		i++;
+	} while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
+}
+
+int test_part_iso (block_dev_desc_t *dev_desc)
+{
+	disk_partition_t info;
+
+	return(get_partition_info_iso_verb(dev_desc,0,&info,0));
+}
+
+#endif /* ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_ISO_PARTITION) */