[U-Boot] [PATCH v1 0/2] Fix SoC-specific exception handling

[Albert ARIBAUD]

Short version:

* this patch fixes exception handling on i.MX27
  which was broken, probably from day one.

* i.MX27-based board Maintainers please test this
  patch: make sure your board boots with it and
  make sure e.g. a write to address 0 causes U-Boot
  to signal a data abort.

* i.MX custodian please review this patch and let
  me know if this should also be done for other i.MX
  SoCs as well.

Long version:

This patch was created after apf27 maintainer found
out that the board did not boot any more. The root
cause was that commit 3ff46cc4 would try and write
into the exception vectors table, which i.MX27 has
in ROM. This caused a data abort, and as the U-Boot
vectors were not in place yet, this abort went to
the ROM code which silently hung.

Investigation led to a patch sent in 2009 to the list
(but never applied) with a description of the i.MX27
exception handling:

http://lists.denx.de/pipermail/u-boot/2009-October/062811.html

By his own author's admission, this patch was not fit for
inclusion in U-Boot, but it gave the technical information
needed to produce this present patch set.

The first patch is only cosmetic, fixing whitespace
quirks which affect legibility or cause a warning in
patman.

The second patch moves vectors relocation out of the
relocate_code routine and into its own relocate_vectors
routine. This routine is made weak so that it can be
replaced by a SoC-specific, strong one. Such a strong
replacement is provided for i.MX27.


Albert ARIBAUD (2):
  cosmetic: arm: fix whitespace in arch/arm/lib/relocate.S
  imx: fix exception vectors relocation in imx27

 arch/arm/cpu/arm926ejs/mx27/Makefile   |  4 ++
 arch/arm/cpu/arm926ejs/mx27/relocate.S | 49 +++++++++++++++++++++++
 arch/arm/lib/crt0.S                    |  5 +++
 arch/arm/lib/relocate.S                | 73 ++++++++++++++++++++--------------
 4 files changed, 101 insertions(+), 30 deletions(-)
 create mode 100644 arch/arm/cpu/arm926ejs/mx27/relocate.S

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2.1.0