linux-kernel - [RFC PATCH 09/11] ARM: dts: AM33XX: Associate SRAM with MPU and mark it exec

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Date:	Tue, 17 Sep 2013 05:43:35 -0700
From:	Russ Dill <Russ.Dill@...com>
To:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org
Cc:	linux-kbuild@...r.kernel.org,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>, mans@...sr.com,
	Shawn Guo <shawn.guo@...aro.org>,
	Dave Martin <Dave.Martin@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>
Subject: [RFC PATCH 09/11] ARM: dts: AM33XX: Associate SRAM with MPU and mark it exec

The SRAM is for use by the MPU. Marking it as such makes it
easier for PM initialization code to locate the SRAM in order to
load a PIE section into it.

Additionally, set the map-exec flag to allow code to be run
from SRAM. This is necessary for suspend/resume.

Signed-off-by: Russ Dill <Russ.Dill@...com>
---
 arch/arm/boot/dts/am33xx.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 302463d..20942a2 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -62,6 +62,7 @@
 		mpu {
 			compatible = "ti,omap3-mpu";
 			ti,hwmods = "mpu";
+			sram = <&ocmcram>;
 		};
 	};
 
@@ -507,6 +508,7 @@
 		ocmcram: ocmcram@...00000 {
 			compatible = "mmio-sram";
 			reg = <0x40300000 0x10000>; /* 64k */
+			map-exec;
 		};
 
 		wkup_m3: wkup_m3@...00000 {
-- 
1.8.3.2

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