diff mbox

[v2,2/2] ARM: shmobile: kzm9g-reference dts: Declare the full 512 MiB of RAM

Message ID 1420571859-11655-3-git-send-email-geert+renesas@glider.be (mailing list archive)
State Superseded
Commit 95c3d4f0e02182f5719d5a13f612d54dc3d8ed15
Delegated to: Simon Horman
Headers show

Commit Message

Geert Uytterhoeven Jan. 6, 2015, 7:17 p.m. UTC
Traditionally, the first 16 MiB of RAM was reserved for the RT
processor.  However, this is incompatible with CONFIG_AUTO_ZRELADDR=y,
which requires that the start address of physical memory is a multiple
of 128 MiB.

As CONFIG_AUTO_ZRELADDR=y is enabled for multi-platform kernels, declare
RAM to start at 0x40000000.

While at it, reclaim the last 8 MiB of RAM, too, so the full 512 MiB is
available. Note that kzm9g_defconfig still has
CONFIG_MEMORY_START=0x41000000 and CONFIG_MEMORY_SIZE=0x1f000000, so
before the advent of DT we scribbled over the last 8 MiB, too.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v2:
  - Drop RFC status,
  - We now know the last 8 MiB of RAM is _not_ used for a U-Boot
    splash screen.
---
 arch/arm/boot/dts/sh73a0-kzm9g-reference.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
index 6d32c87632d42fda..b6c292f839584343 100644
--- a/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
+++ b/arch/arm/boot/dts/sh73a0-kzm9g-reference.dts
@@ -45,7 +45,7 @@ 
 
 	memory {
 		device_type = "memory";
-		reg = <0x41000000 0x1e800000>;
+		reg = <0x40000000 0x20000000>;
 	};
 
 	reg_1p8v: regulator@0 {