tree 994bb4cf82b7efd6c61866cfd551905859288d2f
parent c107c0c05c988ac6cfba6de60c90f105bbea0e1e
author York Sun <yorksun@freescale.com> 1449515129 -0800
committer York Sun <yorksun@freescale.com> 1450141053 +0800

common: Rewrite hiding the end of memory

As the name may be confusing, the CONFIG_SYS_MEM_TOP_HIDE reserves
some memory from the end of ram, tracked by gd->ram_size. It is not
always the top of u-boot visible memory. Rewrite the macro with a
weak function to provide flexibility for complex calcuation. Legacy
use of this macro is still supported.

Signed-off-by: York Sun <yorksun@freescale.com>
Reviewed-by: Simon Glass <sjg@chromium.org>