linux-toradex.git/arch/arm/boot/compressed/head.S, branch v3.4.2

ARM: 7379/1: DT: fix atags_to_fdt() second call site

2012-04-13T13:05:41+00:00

atags_to_fdt() returns 1 when it fails to find a valid FDT signature.
The CONFIG_ARM_ATAG_DTB_COMPAT code is supposed to retry with another
location, but only does so when the initial call doesn't fail.

Fix this by using the correct condition in the assembly code.

Acked-by: Nicolas Pitre 
Signed-off-by: Marc Zyngier 
Cc: stable@vger.kernel.org
Signed-off-by: Russell King

ARM: S3C24XX: change the ARCH_S3C2410 to ARCH_S3C24XX

2012-03-02T22:44:51+00:00

This patch changes the ARCH name to "ARCH_S3C24XX" for Samsung
S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443,
and S3C2450 SoCs so that we can merge the mach-xxx directories
and plat-s3c24xx dir. to just one mach-s3c24xx for them.

I think this should be sent to upstream via samsung tree because
this touches many samsung stuff.

Cc: Dmitry Torokhov 
Cc: Richard Purdie 
Cc: Chris Ball 
Cc: David Woodhouse 
Cc: Alessandro Zummo 
Cc: Grant Likely 
Cc: Greg Kroah-Hartman 
[for the gadget part:]
Acked-by: Felipe Balbi 
[for the framebuffer (video) part:]
Acked-by: Florian Tobias Schandinat 
[For the watchdog-part:]
Acked-by: Wim Van Sebroeck 
Cc: Sangbeom Kim 
Cc: Liam Girdwood 
Cc: Mark Brown 
Cc: Russell King 
Signed-off-by: Kukjin Kim

ARM: LPAE: add ISBs around MMU enabling code

2011-12-08T10:30:38+00:00

Before we enable the MMU, we must ensure that the TTBR registers contain
sane values. After the MMU has been enabled, we jump to the *virtual*
address of the following function, so we also need to ensure that the
SCTLR write has taken effect.

This patch adds ISB instructions around the SCTLR write to ensure the
visibility of the above.

Signed-off-by: Will Deacon 
Signed-off-by: Catalin Marinas

ARM: 7139/1: fix compilation with CONFIG_ARM_ATAG_DTB_COMPAT and large TEXT_OFFSET

2011-10-24T19:53:50+00:00

If TEXT_OFFSET is too large (e.g. like on MSM) the resulting immediate
argument gets wider than 8 bits.

Noticed by David Brown 

Signed-off-by: Nicolas Pitre 
Signed-off-by: Russell King

ARM: zImage: allow supplementing appended DTB with traditional ATAG data

2011-09-14T17:51:59+00:00

Some old bootloaders can't be updated to a device tree capable one,
yet they provide ATAGs with memory configuration, the ramdisk address,
the kernel cmdline string, etc.  To allow a device tree enabled
kernel to be used with such bootloaders, it is necessary to convert those
ATAGs into FDT properties and fold them into the DTB appended to zImage.

Currently the following ATAGs are converted:

	ATAG_CMDLINE
	ATAG_MEM
	ATAG_INITRD2

If the corresponding information already exists in the appended DTB, it
is replaced, otherwise the required node is created to hold it.

The code looks for ATAGs at the location pointed by the value of r2 upon
entry into the zImage code.  If no ATAGs are found there, an attempt at
finding ATAGs at the typical 0x100 offset from start of RAM is made.
Otherwise the DTB is left unchanged.

Thisstarted from an older patch from John Bonesio ,
with contributions from David Brown .

Signed-off-by: Nicolas Pitre 
Tested-by: Shawn Guo 
Tested-by: Dave Martin 
Tested-by: Thomas Abraham

ARM: zImage: make sure appended DTB doesn't get overwritten by kernel .bss

2011-09-14T17:51:57+00:00

The appended DTB gets relocated with the decompressor code to get out
of the way of the decompressed kernel.  However the kernel's .bss section
may be larger than the relocated code and data, and then the DTB gets
overwritten.  Let's make sure the relocation takes care of moving zImage
far enough so no such conflict with .bss occurs.

Thanks to Tony Lindgren  for figuring out this issue.

While at it, let's clean up the code a bit so that the wont_overwrite
symbol is used while determining if a conflict exists, making the above
change more precise as well as eliminating some ARM/THUMB alternates.

Signed-off-by: Nicolas Pitre 
Acked-by: Tony Lindgren 
Tested-by: Shawn Guo 
Tested-by: Dave Martin 
Tested-by: Thomas Abraham

ARM: zImage: Allow the appending of a device tree binary

2011-09-14T17:50:45+00:00

This patch provides the ability to boot using a device tree that is appended
to the raw binary zImage (e.g. cat zImage .dtb > zImage_w_dtb).

Signed-off-by: John Bonesio 
[nico: ported to latest zImage changes plus additional cleanups/improvements]
Signed-off-by: Nicolas Pitre 
Acked-by: Grant Likely 
Acked-by: Tony Lindgren 
Tested-by: Shawn Guo 
Tested-by: Dave Martin 
Tested-by: Thomas Abraham

Merge branches 'btc', 'dma', 'entry', 'fixes', 'linker-layout', 'misc', 'mmci', 'suspend' and 'vfp' into for-next

2011-07-22T22:08:48+00:00

ARM: 6999/1: head, zImage: Always Enter the kernel in ARM state

2011-07-19T11:00:53+00:00

Currently, the documented kernel entry requirements are not
explicit about whether the kernel should be entered in ARM or
Thumb, leading to an ambiguitity about how to enter Thumb-2
kernels.  As a result, the kernel is reliant on the zImage
decompressor to enter the kernel proper in the correct instruction
set state.

This patch changes the boot entry protocol for head.S and Image to
be the same as for zImage: in all cases, the kernel is now entered
in ARM.

Documentation/arm/Booting is updated to reflect this new policy.

A different rule will be needed for Cortex-M class CPUs as and when
support for those lands in mainline, since these CPUs don't support
the ARM instruction set at all: a note is added to the effect that
the kernel must be entered in Thumb on such systems.

Signed-off-by: Dave Martin 
Acked-by: Nicolas Pitre 
Signed-off-by: Russell King

ARM: 6961/1: zImage: Add build-time check for correctly-sized proc_type entries

2011-06-21T10:33:20+00:00

It is easy to mis-maintain the proc_types table such that the
entries become wrongly-sized and misaligned when the kernel is
built in Thumb-2.

This patch adds an assembly-time check which will turn most common
size/alignment mistakes in this table into build failures, to avoid
having to debug the boot-time kernel hang which would happen if the
resulting kernel were actually booted.

Signed-off-by: Dave Martin 
Acked-by: Nicolas Pitre 
Signed-off-by: Russell King