[PATCH] ARM: OMAP2+: Add static SRAM mapping for save_secure_ram_context

[Tony Lindgren]

With the CMA changes from Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>, it
was noticed that n900 stopped booting. After investigating it turned
out that n900 save_secure_ram_context does some whacky virtual to
physical address translation for the SRAM data address.

Let's fix this for CMA changes by adding a static mapping for SRAM
on omap3. Then we can follow up with a patch to clean up the address
translation in save_secure_ram_context later on.

Debugged-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
 arch/arm/mach-omap2/io.c    | 6 ++++++
 arch/arm/mach-omap2/iomap.h | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -139,6 +139,12 @@ static struct map_desc omap243x_io_desc[] __initdata = {
 
 #ifdef	CONFIG_ARCH_OMAP3
 static struct map_desc omap34xx_io_desc[] __initdata = {
+	{
+		.virtual	= OMAP34XX_SRAM_VIRT,
+		.pfn		= __phys_to_pfn(OMAP34XX_SRAM_PHYS),
+		.length		= OMAP34XX_SRAM_SIZE,
+		.type		= MT_DEVICE
+	},
 	{
 		.virtual	= L3_34XX_VIRT,
 		.pfn		= __phys_to_pfn(L3_34XX_PHYS),
diff --git a/arch/arm/mach-omap2/iomap.h b/arch/arm/mach-omap2/iomap.h
--- a/arch/arm/mach-omap2/iomap.h
+++ b/arch/arm/mach-omap2/iomap.h
@@ -123,6 +123,10 @@
  * VPOM3430 was not working for Int controller
  */
 
+#define OMAP34XX_SRAM_PHYS	0x40200000
+#define OMAP34XX_SRAM_VIRT	0xd0010000
+#define OMAP34XX_SRAM_SIZE	0x10000
+
 #define L4_PER_34XX_PHYS	L4_PER_34XX_BASE
 						/* 0x49000000 --> 0xfb000000 */
 #define L4_PER_34XX_VIRT	(L4_PER_34XX_PHYS + OMAP2_L4_IO_OFFSET)
-- 
2.15.0