[U-Boot] [PATCH 0/8] armv7: cache maintenance operations

[Aneesh V]

With D-cache and MMU enabled for ARM in u-boot it becomes imperative to
support a minimal set of cache maintenance operations and necessary
initializations before enabling MMU.

This series of patches attempt to do the following for armv7:
* Necessary initialization sequence before enabling MMU that includes
  invalidation of TLB, data caches, branch predictor array etc.
* Framework for supporting SOC specific outer caches in a generic manner
  (using a structure of function pointers - inspired by the Linux
  implementation)
* Generic armv7 cache maintenance operations for caches known to the CPU
* Support for ARM PL310 L2 cache controller used in OMAP4
* Cleanup of the cleanup_before_linux() function
* Adapting all armv7 SOCs to use the new framework and removing
  duplicated code

Testing:
* Extensive testing on OMAP4430SDP and OMAP3430SDP by creating coherency
  issues and solving them using the maintenance routines
	- Eg: memfill a region of memory with a known pattern
	- Invalidate the region
	- Read back and compare the region with the original pattern
	- If match fails it means that invalidate is successful
	- Now add a flush call just before the invalidate
	- If match succeeds it means that flush was successful
	- Outer caches were tested with experiments involving making the
	  function pointers NULL
* Kernel booting on OMAP4430SDP and OMAP3430SDP


Aneesh V (8):
  arm: make default implementation of cache_flush() weakly linked
  armv7: cache maintenance operations for armv7
  armv7: integrate cache maintenance support
  arm: minor fixes for cache and mmu handling
  armv7: add PL310 support to u-boot
  armv7: adapt omap4 to the new cache maintenance framework
  armv7: adapt omap3 to the new cache maintenance framework
  armv7: adapt s5pc1xx to the new cache maintenance framework

 arch/arm/cpu/armv7/Makefile                   |    2 +-
 arch/arm/cpu/armv7/cache_v7.c                 |  359 +++++++++++++++++++++++++
 arch/arm/cpu/armv7/config.mk                  |    2 +-
 arch/arm/cpu/armv7/cpu.c                      |   47 ++--
 arch/arm/cpu/armv7/omap3/Makefile             |    1 -
 arch/arm/cpu/armv7/omap3/board.c              |  151 +++++++++--
 arch/arm/cpu/armv7/omap3/cache.S              |  263 ------------------
 arch/arm/cpu/armv7/omap3/lowlevel_init.S      |   30 ++
 arch/arm/cpu/armv7/omap4/board.c              |   25 ++-
 arch/arm/cpu/armv7/omap4/lowlevel_init.S      |   17 ++
 arch/arm/cpu/armv7/s5pc1xx/cache.S            |   86 +------
 arch/arm/cpu/armv7/s5pc1xx/clock.c            |   12 +
 arch/arm/cpu/armv7/start.S                    |   18 ++-
 arch/arm/include/asm/arch-omap3/omap3.h       |   20 ++
 arch/arm/include/asm/arch-omap3/sys_proto.h   |   10 +-
 arch/arm/include/asm/arch-omap4/omap4.h       |    6 +
 arch/arm/include/asm/arch-omap4/sys_proto.h   |    3 +-
 arch/arm/include/asm/arch-s5pc1xx/sys_proto.h |    4 +-
 arch/arm/include/asm/armv7.h                  |   63 +++++
 arch/arm/include/asm/pl310.h                  |   49 ++++
 arch/arm/lib/Makefile                         |    1 +
 arch/arm/lib/board.c                          |    6 +
 arch/arm/lib/cache-cp15.c                     |   18 ++-
 arch/arm/lib/cache-pl310.c                    |  114 ++++++++
 arch/arm/lib/cache.c                          |   20 +-
 include/common.h                              |    5 +-
 include/configs/omap4_panda.h                 |    6 +-
 include/configs/omap4_sdp4430.h               |    6 +-
 28 files changed, 929 insertions(+), 415 deletions(-)
 create mode 100644 arch/arm/cpu/armv7/cache_v7.c
 delete mode 100644 arch/arm/cpu/armv7/omap3/cache.S
 create mode 100644 arch/arm/include/asm/armv7.h
 create mode 100644 arch/arm/include/asm/pl310.h
 create mode 100644 arch/arm/lib/cache-pl310.c