ARM: 6225/1: make TCM allocation static and common for all archs

This changes the TCM handling so that a fixed area is reserved at
0xfffe0000-0xfffeffff for TCM. This areas is used by XScale but
XScale does not have TCM so the mechanisms are mutually exclusive.

This change is needed to make TCM detection more dynamic while
still being able to compile code into it, and is a must for the
unified ARM goals: the current TCM allocation at different places
in memory for each machine would be a nightmare if you want to
compile a single image for more than one machine with TCM so it
has to be nailed down in one place.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 1 deletions

diff --git a/Documentation/arm/memory.txt b/Documentation/arm/memory.txt
index eb0fae18ffb1..771d48d3b335 100644
--- a/Documentation/arm/memory.txt
+++ b/Documentation/arm/memory.txt
@@ -33,7 +33,13 @@ ffff0000	ffff0fff	CPU vector page.
 
 fffe0000        fffeffff        XScale cache flush area.  This is used
                                 in proc-xscale.S to flush the whole data
-                                cache.  Free for other usage on non-XScale.
+                                cache. (XScale does not have TCM.)
+
+fffe8000        fffeffff        DTCM mapping area for platforms with
+                                DTCM mounted inside the CPU.
+
+fffe0000        fffe7fff        ITCM mapping area for platforms with
+                                ITCM mounted inside the CPU.
 
 fff00000        fffdffff        Fixmap mapping region.  Addresses provided
                                 by fix_to_virt() will be located here.