linux-kernel - [PATCH 1/4] arm64: dts: Reserve memory regions for hi6220

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Date:	Fri,  9 Oct 2015 12:36:13 +0800
From:	Leo Yan <leo.yan@...aro.org>
To:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Bintian Wang <bintian.wang@...wei.com>,
	Leo Yan <leo.yan@...aro.org>,
	Haojian Zhuang <haojian.zhuang@...aro.org>,
	Wei Xu <xuwei5@...ilicon.com>,
	Yiping Xu <xuyiping@...ilicon.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nel.org>,
	Tyler Baker <tyler.baker@...aro.org>
Subject: [PATCH 1/4] arm64: dts: Reserve memory regions for hi6220

On Hi6220, below memory regions in DDR have specific purpose:

  0x05e0,0000 - 0x05ef,ffff: For MCU firmware using at runtime;
  0x06df,f000 - 0x06df,ffff: For mailbox message data;
  0x0740,f000 - 0x0740,ffff: For MCU firmware's section;
  0x3e00,0000 - 0x3fff,ffff: For OP-TEE.

This patch reserves these memory regions in DT.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
index e36a539..e3f4cb3 100644
--- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
+++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
@@ -7,9 +7,6 @@
 
 /dts-v1/;
 
-/*Reserved 1MB memory for MCU*/
-/memreserve/ 0x05e00000 0x00100000;
-
 #include "hi6220.dtsi"
 
 / {
@@ -24,8 +21,19 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	/*
+	 * Reserve below regions from memory node:
+	 *
+	 *  - 0x05e0,0000 - 0x05ef,ffff: MCU firmware runtime using
+	 *  - 0x06df,f000 - 0x06df,ffff: Mailbox message data
+	 *  - 0x0740,f000 - 0x0740,ffff: MCU firmware section
+	 *  - 0x3e00,0000 - 0x3fff,ffff: OP-TEE
+	 */
 	memory@0 {
 		device_type = "memory";
-		reg = <0x0 0x0 0x0 0x40000000>;
+		reg = <0x00000000 0x00000000 0x00000000 0x05e00000>,
+		      <0x00000000 0x05f00000 0x00000000 0x00eff000>,
+		      <0x00000000 0x06e00000 0x00000000 0x0060f000>,
+		      <0x00000000 0x07410000 0x00000000 0x36bf0000>;
 	};
 };
-- 
1.9.1

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