[PATCH] barebox multi image support

[Sascha Hauer]

This series adds support for generating multiple images from a single
barebox binary. This helps when for example boards come with different
SDRAM setups. Instead of having a config for each SDRAM setup we only
have a single configuration, but generate multiple images from it.

The basic idea behind this is using a PBL. As of now the PBL on ARM
has a single entrypoint: barebox_arm_entry. With multi image support
instead we have many entrypoints in the PBL. The correct one will
be chosen by the linker when generating a particular image. The PBLs
can also contain a devicetree which is passed to the regular barebox
image. This opens up the way to a true multi board barebox.

Additionally each PBL/barebox combination can be encapsulated into a
SoC specific image so that the different requirements for the boards
booting a image can be met.

This series adds the make infrastructure and converts a few boards
over to use it.

Sascha

----------------------------------------------------------------
Sascha Hauer (12):
      ARM: split barebox_arm_head in two separate functions
      ARM: pbl: move linker script to lib
      ARM: build dtbs unconditionally
      ARM: Add image end section
      imx-image: fix path to imx-image binary
      Add multi images support
      ARM: i.MX: Add multi images support Makefile
      ARM: i.MX27 pcm038: switch to multi image
      ARM: i.MX53 loco: Switch to imximage
      ARM: i.MX53 loco: Switch to multi image support
      ARM: dmo realq7: switch to multi image support
      ARM: i.MX51 babbage: switch to multi image support

 Makefile                                           |   8 ++
 arch/arm/Makefile                                  |   2 +-
 arch/arm/boards/dmo-mx6-realq7/lowlevel.c          |  12 +-
 arch/arm/boards/freescale-mx51-pdk/lowlevel.c      |  14 ++-
 arch/arm/boards/freescale-mx53-loco/Makefile       |   4 +-
 arch/arm/boards/freescale-mx53-loco/board.c        |   8 +-
 arch/arm/boards/freescale-mx53-loco/dcd-data.h     |  54 ---------
 .../boards/freescale-mx53-loco/flash-header.imxcfg |  54 +++++++++
 arch/arm/boards/freescale-mx53-loco/flash_header.c |  52 ---------
 arch/arm/boards/freescale-mx53-loco/lowlevel.c     |  14 ++-
 arch/arm/boards/pcm038/lowlevel.c                  |   4 +-
 arch/arm/cpu/Makefile                              |   4 +-
 arch/arm/cpu/start-images.c                        |  49 ++++++++
 arch/arm/cpu/uncompress.c                          | 108 ++++++++++++++++++
 arch/arm/dts/Makefile                              |   4 +
 arch/arm/include/asm/barebox-arm-head.h            |  14 ++-
 arch/arm/include/asm/barebox-arm.h                 |   4 +
 arch/arm/{pbl/zbarebox.lds.S => lib/pbl.lds.S}     |   9 +-
 arch/arm/lib/runtime-offset.S                      |   3 +
 arch/arm/mach-imx/Kconfig                          |   7 +-
 arch/arm/pbl/Makefile                              |   5 +-
 images/Makefile                                    | 124 +++++++++++++++++++++
 images/Makefile.imx                                |  36 ++++++
 include/asm-generic/sections.h                     |   1 +
 pbl/Kconfig                                        |  16 +++
 scripts/Makefile.lib                               |   2 +-
 26 files changed, 481 insertions(+), 131 deletions(-)
 delete mode 100644 arch/arm/boards/freescale-mx53-loco/dcd-data.h
 create mode 100644 arch/arm/boards/freescale-mx53-loco/flash-header.imxcfg
 delete mode 100644 arch/arm/boards/freescale-mx53-loco/flash_header.c
 create mode 100644 arch/arm/cpu/start-images.c
 create mode 100644 arch/arm/cpu/uncompress.c
 rename arch/arm/{pbl/zbarebox.lds.S => lib/pbl.lds.S} (93%)
 create mode 100644 images/Makefile
 create mode 100644 images/Makefile.imx