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102 lines
3.4 KiB
102 lines
3.4 KiB
13 years ago
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From a73c2d9dc7ea0d14fbf48db48e783d123162f5c3 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jonas.gorski@gmail.com>
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Date: Thu, 19 Apr 2012 13:15:57 +0200
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Subject: [PATCH] mtd: bcm63xxpart: handle Broadcom partition order
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The original Broadcom partition order has the root fs in front of the
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kernel, which resulted in miscalculated partition sizes.
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Detect when such an image is on the flash and also reorder the partitions
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accordingly.
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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Acked-by: Florian Fainelli <florian@openwrt.org>
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Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
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---
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drivers/mtd/bcm63xxpart.c | 41 ++++++++++++++++++++++++++++++-----------
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1 file changed, 30 insertions(+), 11 deletions(-)
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--- a/drivers/mtd/bcm63xxpart.c
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+++ b/drivers/mtd/bcm63xxpart.c
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@@ -4,7 +4,7 @@
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* Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
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* Mike Albon <malbon@openwrt.org>
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* Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
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- * Copyright © 2011 Jonas Gorski <jonas.gorski@gmail.com>
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+ * Copyright © 2011-2012 Jonas Gorski <jonas.gorski@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -82,6 +82,7 @@ static int bcm63xx_parse_cfe_partitions(
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int namelen = 0;
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int i;
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u32 computed_crc;
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+ bool rootfs_first = false;
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if (bcm63xx_detect_cfe(master))
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return -EINVAL;
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@@ -109,6 +110,7 @@ static int bcm63xx_parse_cfe_partitions(
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char *boardid = &(buf->board_id[0]);
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char *tagversion = &(buf->tag_version[0]);
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+ sscanf(buf->flash_image_start, "%u", &rootfsaddr);
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sscanf(buf->kernel_address, "%u", &kerneladdr);
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sscanf(buf->kernel_length, "%u", &kernellen);
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sscanf(buf->total_length, "%u", &totallen);
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@@ -117,10 +119,19 @@ static int bcm63xx_parse_cfe_partitions(
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tagversion, boardid);
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kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE;
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- rootfsaddr = kerneladdr + kernellen;
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+ rootfsaddr = rootfsaddr - BCM63XX_EXTENDED_SIZE;
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spareaddr = roundup(totallen, master->erasesize) + cfelen;
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sparelen = master->size - spareaddr - nvramlen;
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- rootfslen = spareaddr - rootfsaddr;
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+
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+ if (rootfsaddr < kerneladdr) {
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+ /* default Broadcom layout */
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+ rootfslen = kerneladdr - rootfsaddr;
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+ rootfs_first = true;
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+ } else {
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+ /* OpenWrt layout */
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+ rootfsaddr = kerneladdr + kernellen;
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+ rootfslen = spareaddr - rootfsaddr;
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+ }
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} else {
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pr_warn("CFE boot tag CRC invalid (expected %08x, actual %08x)\n",
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buf->header_crc, computed_crc);
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@@ -156,18 +167,26 @@ static int bcm63xx_parse_cfe_partitions(
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curpart++;
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if (kernellen > 0) {
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- parts[curpart].name = "kernel";
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- parts[curpart].offset = kerneladdr;
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- parts[curpart].size = kernellen;
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+ int kernelpart = curpart;
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+
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+ if (rootfslen > 0 && rootfs_first)
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+ kernelpart++;
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+ parts[kernelpart].name = "kernel";
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+ parts[kernelpart].offset = kerneladdr;
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+ parts[kernelpart].size = kernellen;
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curpart++;
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}
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if (rootfslen > 0) {
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- parts[curpart].name = "rootfs";
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- parts[curpart].offset = rootfsaddr;
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- parts[curpart].size = rootfslen;
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- if (sparelen > 0)
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- parts[curpart].size += sparelen;
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+ int rootfspart = curpart;
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+
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+ if (kernellen > 0 && rootfs_first)
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+ rootfspart--;
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+ parts[rootfspart].name = "rootfs";
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+ parts[rootfspart].offset = rootfsaddr;
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+ parts[rootfspart].size = rootfslen;
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+ if (sparelen > 0 && !rootfs_first)
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+ parts[rootfspart].size += sparelen;
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curpart++;
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}
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