avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/disk/part_iso.c

@@ -0,0 +1,264 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/unaligned.h>
+#include "part_iso.h"
+
+#ifdef HAVE_BLOCK_DEVICE
+
+/* #define	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];
+
+unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
+                        lbaint_t blkcnt, void *buffer)
+{
+	unsigned long ret;
+
+	if (block_dev->blksz == 512) {
+		/* Convert from 2048 to 512 sector size */
+		start *= 4;
+		blkcnt *= 4;
+	}
+
+	ret = blk_dread(block_dev, start, blkcnt, buffer);
+
+	if (block_dev->blksz == 512)
+		ret /= 4;
+
+	return ret;
+}
+
+/* only boot records will be listed as valid partitions */
+int part_get_info_iso_verb(struct blk_desc *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;
+
+	if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
+		return -1;
+
+	/* the first sector (sector 0x10) must be a primary volume desc */
+	blkaddr=PVD_OFFSET;
+	if (iso_dread(dev_desc, 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->devnum, part_num);
+		return (-1);
+	}
+	if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
+		if(verb)
+			printf ("** Wrong ISO Ident: %s on %d:%d **\n",
+				ppr->stand_ident, dev_desc->devnum, part_num);
+		return (-1);
+	}
+	lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE);
+	/* assuming same block size for all entries */
+	info->blksz = be16_to_cpu(ppr->secsize_BE);
+	PRINTF(" Lastsect:%08lx\n",lastsect);
+	for(i=blkaddr;i<lastsect;i++) {
+		PRINTF("Reading block %d\n", i);
+		if (iso_dread(dev_desc, 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->devnum, 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->devnum, part_num);
+		return (-1);
+	}
+	bootaddr = get_unaligned_le32(pbr->pointer);
+	PRINTF(" Boot Entry at: %08lX\n",bootaddr);
+	if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
+		if(verb)
+			printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
+				bootaddr, dev_desc->devnum, part_num);
+		return (-1);
+	}
+	chksum=0;
+	chksumbuf = (unsigned short *)tmpbuf;
+	for(i=0;i<0x10;i++)
+		chksum += le16_to_cpu(chksumbuf[i]);
+	if(chksum!=0) {
+		if(verb)
+			printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
+			       dev_desc->devnum, 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->devnum, 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->devnum, part_num);
+		return(-1);
+	}
+#endif
+	/* the validation entry seems to be ok, now search the "partition" */
+	entry_num=1;
+	offset=0x20;
+	strcpy((char *)info->type, "U-Boot");
+	switch(dev_desc->if_type) {
+		case IF_TYPE_IDE:
+		case IF_TYPE_SATA:
+		case IF_TYPE_ATAPI:
+			sprintf ((char *)info->name, "hd%c%d",
+				'a' + dev_desc->devnum, part_num);
+			break;
+		case IF_TYPE_SCSI:
+			sprintf ((char *)info->name, "sd%c%d",
+				'a' + dev_desc->devnum, part_num);
+			break;
+		case IF_TYPE_USB:
+			sprintf ((char *)info->name, "usbd%c%d",
+				'a' + dev_desc->devnum, part_num);
+			break;
+		case IF_TYPE_DOC:
+			sprintf ((char *)info->name, "docd%c%d",
+				'a' + dev_desc->devnum, part_num);
+			break;
+		default:
+			sprintf ((char *)info->name, "xx%c%d",
+				'a' + dev_desc->devnum, 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->devnum);
+			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->devnum);
+	return(-1);
+found:
+	if(pide->boot_ind!=0x88) {
+		if(verb)
+			printf("** Partition %d is not bootable on device %d **\n",
+			       part_num, dev_desc->devnum);
+		return (-1);
+	}
+	switch(pide->boot_media) {
+		case 0x00: /* no emulation */
+			info->size = get_unaligned_le16(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 = get_unaligned_le32(pide->rel_block_addr);
+	info->start=newblkaddr;
+
+	if (dev_desc->blksz == 512) {
+		info->size *= 4;
+		info->start *= 4;
+		info->blksz = 512;
+	}
+
+	PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
+	return 0;
+}
+
+static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
+				  disk_partition_t *info)
+{
+	return part_get_info_iso_verb(dev_desc, part_num, info, 1);
+}
+
+static void part_print_iso(struct blk_desc *dev_desc)
+{
+	disk_partition_t info;
+	int i;
+
+	if (part_get_info_iso_verb(dev_desc, 0, &info, 0) == -1) {
+		printf("** No boot partition found on device %d **\n",
+		       dev_desc->devnum);
+		return;
+	}
+	printf("Part   Start     Sect x Size Type\n");
+	i=0;
+	do {
+		printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
+		       i, info.start, info.size, info.blksz, info.type);
+		i++;
+	} while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
+}
+
+static int part_test_iso(struct blk_desc *dev_desc)
+{
+	disk_partition_t info;
+
+	return part_get_info_iso_verb(dev_desc, 1, &info, 1);
+}
+
+U_BOOT_PART_TYPE(iso) = {
+	.name		= "ISO",
+	.part_type	= PART_TYPE_ISO,
+	.get_info	= part_get_info_iso,
+	.print		= part_print_iso,
+	.test		= part_test_iso,
+};
+#endif