[RFC, PATCH] barebox-update command support

[Sascha Hauer]

Hi All,

The following adds barebox-update command support. This command is
supposed to provide a dedicated command for updating barebox.

The rationale behind this is:

- We can add additional generic, SoC specific, board specific sanity
  checks (Is this really a barebox image? Does the image fit into the
  device?)
- Sometimes SoC or board specific fixups are necessary. For example,
  with Omap Nand boot we have to switch the Nand driver into a different
  ECC mode before flashing barebox. With i.MX MMC card boot we want
  to preserve the partition table. On i.MX28 Nand boot we have to create
  a Boot Control Block. The list does not end here...

The current idea is:

A board can register one or multiple update handlers. The update handlers
themselves are registered by a board because only the board knows where
it actually can boot from. Nevertheless there might be generic handlers
available, the most simple one being: Check image header, check size, write
to device.

This is in an early state, right now there are only dummy handlers, hence the
RFC state.

Sascha

----------------------------------------------------------------
Sascha Hauer (3):
      Add barebox update infrastructure
      ARM: Add dummy update handler
      ARM pcm038: register nor update handler

 arch/arm/boards/pcm038/pcm038.c |    7 +++
 arch/arm/lib/Makefile           |    1 +
 arch/arm/lib/bbu.c              |   56 ++++++++++++++++++++
 commands/Kconfig                |    5 ++
 commands/Makefile               |    1 +
 commands/barebox-update.c       |   80 ++++++++++++++++++++++++++++
 common/Kconfig                  |    3 ++
 common/Makefile                 |    1 +
 common/bbu.c                    |  110 +++++++++++++++++++++++++++++++++++++++
 include/bbu.h                   |   40 ++++++++++++++
 10 files changed, 304 insertions(+)
 create mode 100644 arch/arm/lib/bbu.c
 create mode 100644 commands/barebox-update.c
 create mode 100644 common/bbu.c
 create mode 100644 include/bbu.h