[U-Boot] [PATCH v2 00/10] armv7: cache maintenance operations

[Simon Glass]

Hi,

Can I inquire please what has happened with this patch series? Will it be
applied? I have done some basic testing here on Tegra2 and it appears to
work.

Regards,
Simon

On Tue, Mar 8, 2011 at 5:07 AM, Aneesh V <aneesh at ti.com> wrote:

> 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
> Note: v2 has been tested only on OMAP4430SDP
>
> v2:
> * Pointer based callback mechanism for outer cache operations
>  changed to a weakly linked functions.
> * Change -march=armv7-a back to armv5
> * Moved utility macros out of armv7.h
> * Added documentation for new CONFIG options.
> * Changed implementation of log2n to not use CLZ instruction as armv4
>  doesn't support this instruction and newly added Tegra2 uses
>  -march=armv4
> * Blank line after local variable declarations - fixed globally
> * Explicitly added an empty flush_cache() under
>  #ifdef CONFIG_SYS_NO_DCACHE
> * Removed the print inside the weakly linked stub function -
>  __arm_init_before_mmu
> * Fixed signature of flush_cache in cache.c
> * More descriptive commit message for the PL310 support patch
> * C struct for PL310 register accesses
> * Fixed white space issues
>
> Aneesh V (10):
>  arm: make default implementation of cache_flush() weakly linked
>  armv7: add miscellaneous utility macros
>  armv7: cache maintenance operations for armv7
>  armv7: replace CONFIG_L2_OFF with CONFIG_SYS_NO_L2CACHE
>  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
>
>  README                                        |   11 +
>  arch/arm/cpu/armv7/Makefile                   |    2 +-
>  arch/arm/cpu/armv7/cache_v7.c                 |  390
> +++++++++++++++++++++++++
>  arch/arm/cpu/armv7/cpu.c                      |   51 ++--
>  arch/arm/cpu/armv7/omap3/Makefile             |    1 -
>  arch/arm/cpu/armv7/omap3/board.c              |  138 ++++++++--
>  arch/arm/cpu/armv7/omap3/cache.S              |  263 -----------------
>  arch/arm/cpu/armv7/omap3/lowlevel_init.S      |   32 ++
>  arch/arm/cpu/armv7/omap4/lowlevel_init.S      |   18 ++
>  arch/arm/cpu/armv7/s5pc1xx/cache.S            |   88 +-----
>  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/sys_proto.h   |    1 -
>  arch/arm/include/asm/arch-s5pc1xx/sys_proto.h |    3 -
>  arch/arm/include/asm/armv7.h                  |   68 +++++
>  arch/arm/include/asm/pl310.h                  |   74 +++++
>  arch/arm/include/asm/utils.h                  |   80 +++++
>  arch/arm/lib/Makefile                         |    1 +
>  arch/arm/lib/board.c                          |    6 +
>  arch/arm/lib/cache-cp15.c                     |   16 +-
>  arch/arm/lib/cache-pl310.c                    |  116 ++++++++
>  arch/arm/lib/cache.c                          |   20 +-
>  include/common.h                              |    5 +-
>  include/configs/ca9x4_ct_vxp.h                |    2 +-
>  include/configs/efikamx.h                     |    2 +-
>  include/configs/mx51evk.h                     |    2 +-
>  include/configs/mx53evk.h                     |    2 +-
>  include/configs/omap4_panda.h                 |    8 +-
>  include/configs/omap4_sdp4430.h               |    8 +-
>  include/configs/s5pc210_universal.h           |    2 +-
>  include/configs/tegra2-common.h               |    2 +-
>  include/configs/vision2.h                     |    2 +-
>  33 files changed, 1037 insertions(+), 425 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/include/asm/utils.h
>  create mode 100644 arch/arm/lib/cache-pl310.c
>
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