ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3

This adds the TCM interface to Linux, when active, it will
detect and report TCM memories and sizes early in boot if
present, introduce generic TCM memory handling, provide a
generic TCM memory pool and select TCM memory for the U300
platform.

See the Documentation/arm/tcm.txt for documentation.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index ea36186f32c3..764d5dc9af76 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -613,6 +613,14 @@ void __init mem_init(void)
 
 void free_initmem(void)
 {
+#ifdef CONFIG_HAVE_TCM
+        extern char *__tcm_start, *__tcm_end;
+
+        totalram_pages += free_area(__phys_to_pfn(__pa(__tcm_start)),
+                                    __phys_to_pfn(__pa(__tcm_end)),
+                                    "TCM link");
+#endif
+
         if (!machine_is_integrator() && !machine_is_cintegrator())
                 totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
                                             __phys_to_pfn(__pa(__init_end)),