tree bc0a72c26cd5fece59dd02fb6df0851c69e3a74d
parent 0d04eb47054f685b23033ed6ceadfb20db77c5b3
author David Brownell <dbrownell@users.sourceforge.net> 1241713902 -0700
committer Kevin Hilman <khilman@deeprootsystems.com> 1243549093 -0700

davinci: add SRAM allocator

Provide a generic SRAM allocator using genalloc, and vaguely
modeled after what AVR32 uses.  This builds on top of the
static CPU mapping set up in the previous patch, and returns
DMA mappings as requested (if possible).

Compared to its OMAP cousin, there's no current support for
(currently non-existent) DaVinci power management code running
in SRAM; and this has ways to deallocate, instead of being
allocate-only.

The initial user of this should probably be the audio code,
because EDMA from DDR is subject to various dropouts on at
least DM355 and DM6446 chips.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>