vexpress64: fix various memory issues
The ARM Trusted Firmware or other security solutions are eating memory from the top of the physical SDRAM1 space, moving backward from 0xffffffff, currently occupying e.g. 0xfe000000-0xffffffff with Trusted Firmware. This solution to reserving memory for secure world is not optimal, so we need to think of how the secure world and earlier boot stages should communicate to U-Boot what memory they are eating up. For now let's just put 16MB aside. Also enable the memory test command and define start and end of the test range so we can check that we actually have all that memory available and working. Suggested-by: NAxel Haslam <ahaslam@baylibre.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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