From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH] fix i.MX external NAND boot bad block handling
Date: Tue, 12 Mar 2013 10:29:53 +0100 [thread overview]
Message-ID: <1363080597-10510-1-git-send-email-s.hauer@pengutronix.de> (raw)
The i.MX external NAND boot code relied very much on all block
used for the bootloader are good. It has some bad block checking,
but unfortunately it tested for a bad block in each page of a
block and skipped this page instead of checking for a bad block
at the beginning of a block and skipping the whole block then.
The handling of 2k page NAND flashes has another problem with bad
blocks. We rely on a bad block table since we cannot properly keep
the BBM on flash. This also means that the external NAND boot code
cannot detect bad blocks. This series adds a barebox update handler
to generate a bad block table (well, as long as we consider a 32bit
bitmask a table ;) inside the initial 2k page.
Sascha
----------------------------------------------------------------
Sascha Hauer (4):
ARM: i.MX: external nand boot: check for bad blocks
ARM: head: Add some space behind the image header
ARM: i.MX: Add bbu handler for external NAND boot
ARM: i.MX pcm043: register external nand boot handler
arch/arm/boards/pcm043/pcm043.c | 6 +
arch/arm/include/asm/barebox-arm-head.h | 10 ++
arch/arm/mach-imx/Kconfig | 6 +
arch/arm/mach-imx/Makefile | 1 +
arch/arm/mach-imx/external-nand-boot.c | 59 +++++++--
arch/arm/mach-imx/imx-bbu-external-nand.c | 204 ++++++++++++++++++++++++++++++
arch/arm/mach-imx/include/mach/bbu.h | 11 ++
arch/arm/mach-imx/include/mach/imx-nand.h | 6 +
8 files changed, 289 insertions(+), 14 deletions(-)
create mode 100644 arch/arm/mach-imx/imx-bbu-external-nand.c
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next reply other threads:[~2013-03-12 9:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-12 9:29 Sascha Hauer [this message]
2013-03-12 9:29 ` [PATCH 1/4] ARM: i.MX: external nand boot: check for bad blocks Sascha Hauer
2013-03-12 9:29 ` [PATCH 2/4] ARM: head: Add some space behind the image header Sascha Hauer
2013-03-12 9:41 ` Juergen Beisert
2013-03-12 9:29 ` [PATCH 3/4] ARM: i.MX: Add bbu handler for external NAND boot Sascha Hauer
2013-03-12 9:48 ` Juergen Beisert
2013-03-12 10:05 ` Sascha Hauer
2013-03-12 10:08 ` Juergen Beisert
2013-03-12 9:29 ` [PATCH 4/4] ARM: i.MX pcm043: register external nand boot handler Sascha Hauer
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