tree 138743620b6021df83f0a908421562e1279d4e90
parent 96a598996f6ac518ac79839ecbb17c91af91f4f7
author Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 1512400140 +0100
committer Rich Felker <dalias@libc.org> 1523576873 -0400

arch/sh: add sh7786_mm_sel() function

The SH7786 has different physical memory layout configurations,
configurable through the MMSELR register. The configuration is
typically defined by the bootloader, so Linux generally doesn't care.

Except that depending on the configuration, some PCI MEM areas may or
may not be available. This commit adds a helper function that allows
to retrieve the current physical memory layout configuration. It will
be used in a following patch to exclude unusable PCI MEM areas during
the PCI initialization.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Rich Felker <dalias@libc.org>