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

[Paulraj, Sandeep]

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


As I mentioned to John Rigby in anoterh e-mail, I will be on vacation till the 20th of January. So there might be a little delay in merging this patch series after due review by the community.

Regards,
Sandeep