rework MMU support

[Sascha Hauer]

On Mon, Aug 01, 2011 at 03:26:43PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> Hi,
> 
> 	This series reworks the barebox MMU support. We now use second
> 	level page tables which allows us to remap the dma coherent area
> 	dynamically. We don't have to map our sdram twice anymore which
> 	helps us on newer systems with big memory.
> 
> 	As a bonus there is no board specific MMU code anymore. All a board
> 	has to do to enable MMU support via Kconfig is to register its SDRAM banks
> 	at mem_initcall
> 
> The following changes since commit b821d73607cc6387b1ee588af97a44e8eb2b4fe2:
> 
>   Merge branch 'resource' of git://uboot.jcrosoft.org/barebox into next (2011-08-01 14:10:38 +0200)
> 
> are available in the git repository at:
> 
>   git://uboot.jcrosoft.org/barebox.git mmu
> 
> Jean-Christophe PLAGNIOL-VILLARD (2):
>       arm: introduce arm_add_mem_device to register dram device
>       init: introduce mem, mmu and postmmu initcall
> 
> Sascha Hauer (7):
>       ARM cache l2x0: depend on MMU
>       ARM: move armlinux_add_dram to location which is always compiled
>       ARM l2x0: make init function static inline if l2 is not available
>       ARM: pass size to dma_free_coherent
>       ARM boards: move sdram setup before mmu setup
>       ARM: rework MMU support
>       ARM boards: remove now unnecessary mmu calls

merged up to 7/9. The MMU rework needs some changes to v1 which I
haven't posted yet. It does not work correctly on armv7 as these
processors need slightly different second level page table entries.

Also, I added the appropriate KEEP directives to
include/asm-generic/barebox.lds.h to make this branch work. Would be
good if you could give your patches at least *some* testing.

Sascha


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