Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-26 22:21:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

mtd: bcm63xxpart: handle Broadcom partition order

Browse Source 
The original Broadcom partition order has the root fs in front of the
kernel, which resulted in miscalculated partition sizes.
Detect when such an image is on the flash and also reorder the partitions
accordingly.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Jonas Gorski 2012-04-19 13:15:57 +02:00 committed by David Woodhouse
parent a9c465f07c
commit 5329d67cc3
1 changed files with 30 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/mtd/bcm63xxpart.c
View File

@ -4,7 +4,7 @@
* Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
* Mike Albon <malbon@openwrt.org>
* Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
* Copyright © 2011 Jonas Gorski <jonas.gorski@gmail.com>
* Copyright © 2011-2012 Jonas Gorski <jonas.gorski@gmail.com>
*
* 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
@ -82,6 +82,7 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
int namelen = 0;
int i;
u32 computed_crc;
bool rootfs_first = false;
if (bcm63xx_detect_cfe(master))
return -EINVAL;
@ -109,6 +110,7 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
char *boardid = &(buf->board_id[0]);
char *tagversion = &(buf->tag_version[0]);
sscanf(buf->flash_image_start, "%u", &rootfsaddr);
sscanf(buf->kernel_address, "%u", &kerneladdr);
sscanf(buf->kernel_length, "%u", &kernellen);
sscanf(buf->total_length, "%u", &totallen);
@ -117,10 +119,19 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
tagversion, boardid);
kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE;
rootfsaddr = kerneladdr + kernellen;
rootfsaddr = rootfsaddr - BCM63XX_EXTENDED_SIZE;
spareaddr = roundup(totallen, master->erasesize) + cfelen;
sparelen = master->size - spareaddr - nvramlen;
rootfslen = spareaddr - rootfsaddr;
if (rootfsaddr < kerneladdr) {
/* default Broadcom layout */
rootfslen = kerneladdr - rootfsaddr;
rootfs_first = true;
} else {
/* OpenWrt layout */
rootfsaddr = kerneladdr + kernellen;
rootfslen = spareaddr - rootfsaddr;
}
} else {
pr_warn("CFE boot tag CRC invalid (expected %08x, actual %08x)\n",
buf->header_crc, computed_crc);
@ -156,18 +167,26 @@ static int bcm63xx_parse_cfe_partitions(struct mtd_info *master,
curpart++;
if (kernellen > 0) {
parts[curpart].name = "kernel";
parts[curpart].offset = kerneladdr;
parts[curpart].size = kernellen;
int kernelpart = curpart;
if (rootfslen > 0 && rootfs_first)
kernelpart++;
parts[kernelpart].name = "kernel";
parts[kernelpart].offset = kerneladdr;
parts[kernelpart].size = kernellen;
curpart++;
}
if (rootfslen > 0) {
parts[curpart].name = "rootfs";
parts[curpart].offset = rootfsaddr;
parts[curpart].size = rootfslen;
if (sparelen > 0)
parts[curpart].size += sparelen;
int rootfspart = curpart;
if (kernellen > 0 && rootfs_first)
rootfspart--;
parts[rootfspart].name = "rootfs";
parts[rootfspart].offset = rootfsaddr;
parts[rootfspart].size = rootfslen;
if (sparelen > 0 && !rootfs_first)
parts[rootfspart].size += sparelen;
curpart++;
}