From cfdc6c9324dd675dbe28fa59e1a075cb04ef02e9 Mon Sep 17 00:00:00 2001 From: Anson Huang Date: Tue, 10 Nov 2015 19:12:55 +0800 Subject: MLK-11844-2 ARM: dts: imx7d: reserve DDR space for M4 use case FreeRTOS/M4 has DDR use case, M4 can only execute on DDR space lower than 0xa0000000, Linux kernel will reserve 1M (0x9ff00000 - 0x9fffffff) for it, below are the DDR usage: 0x80000000 - 0x9fefffff: Linux kernel; 0x9ff00000 - 0x9fffffff: FreeRTOS; 0xa0000000 - 0xbfefffff: Linux kernel; 0xbff00000 - 0xbfffffff: RPMSG shared memory; 0xc0000000 - 0xffffffff: Linux kernel if boards has 2GB DDR. Also, remove 'reg' property which is unused. Signed-off-by: Anson Huang --- arch/arm/boot/dts/imx7d-sdb-m4.dts | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/arm/boot/dts/imx7d-sdb-m4.dts') diff --git a/arch/arm/boot/dts/imx7d-sdb-m4.dts b/arch/arm/boot/dts/imx7d-sdb-m4.dts index abbe365a6e50..2246cb3f3075 100644 --- a/arch/arm/boot/dts/imx7d-sdb-m4.dts +++ b/arch/arm/boot/dts/imx7d-sdb-m4.dts @@ -10,8 +10,8 @@ / { memory { - linux,usable-memory = <0x80000000 0x3ff00000>; - reg = <0x80000000 0x80000000>; + linux,usable-memory = <0x80000000 0x1ff00000>, + <0xa0000000 0x1ff00000>; }; }; -- cgit v1.2.3