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Otherwise, 'saveenv' hangs if we have env in eNVM (with D/I caches
ON).
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

This format we're using in linux now.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

To enable splash:
  tftp clock24.bmp
  prot off 60fa0000 +${filesize}
  era 60fa0000 +${filesize}
  cp.b ${loadaddr} 60fa0000 ${filesize}
  setenv splashimage 60fa0000

BMP in this example is available here:
  http://localhost:8000/Projects/RT89558?action=AttachFile&do=get&target=clock24.bmp

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Imported existing code from u-boot-vybrid, implemented in RT89558.

This clock rate is useful to quicly calculate the output from other
PLLs, for example PLLSAI.

Note, 'dmamem' is now allocated (and then reserved in linux) before
the middle of the SDRAM. This is to be able to run rather big (~6MB)
'qt' app in linux then.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

This is to avoid 'HARD FAULT' when booting from flash mem having the
'write-back' caching policy. In this case the data copied may remain
in D-cache without flushing them to SDRAM, so on executing such code
we'll fill I-cache with garbage from SDRAM.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

In case of disabled DCACHE we previously had the only one 4GB MPU
region with 'Strongly ordered' mem type. This led to problems with
strex/ldrex instruction targeted such mem (and thus we couldn't use
these instructions).

Now we always create 2 MPU region, even if DCACHE is off. The 2nd
MPU region is mapped to external SDRAM, and has 'Normal' mem type.

This patch also changes 'write-through' caching policy to 'write-
back with write & read allocate'.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Enable D- and I-caches in STM32F7-SOM.

Increase CPU frequency up to 200MHz on STM32F7-SOM.

- Validate NOR flash, SDRAM and networking support in STM32F7 U-Boot.

Boot STM32F7-SOM up to U-Boot prompt.

Initial skeleton of the STM32F7 SOM port. The configuration builds
but hasn't been yet tried on the target.

...
Board: STM-SOM Rev Rev 2.A, www.emcraft.com
...

Signed-off-by: Greg Martin <gregm102@me.com>
Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>

 - Changed ECC layout to actual
 - Removed Freescale JFFS2 cleanmarker pages hack which disables ECC for
   the OOB writes. The controller doesn't seem support relaible OOB writes.

Environment in eNVM is disabled by default (env is in NOR Flash).
To enable, switch CONFIG_ENVM_IS_IN_ENVM in the config file.