Commit 4436a371 authored Jun 26, 2018 by Victor Gu Committed by Gregory CLEMENT Jun 29, 2018

arm64: dts: marvell: armada-37xx: reserve memory for ATF



The PSCI area should be reserved in Linux for PSCI operations such as
suspend/resume.

Reserve 2MiB of memory which matches the area used by ATF (BL1, BL2,
BL3x, see [1] in ATF source code). This covers all PSCI code and data
area and is 2MiB aligned, which is required by Linux for huge pages
handling.

Please note that this is a default setup allowing to perform PSCI
operations with legacy bootloaders. Recent bootloaders should update the
region size/position accordingly.

[1] plat/marvell/a3700/common/include/platform_def.h

Signed-off-by: Victor Gu <xigu@marvell.com>
[miquel.raynal@bootlin.com: reword of commit message, comment in the DTSI]
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

parent d970737f

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

+15 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,21 @@
		serial1 = &uart1;
		};

		reserved-memory {
		#address-cells = <2>;
		#size-cells = <2>;
		ranges;

		/*
		* The PSCI firmware region depicted below is the default one
		* and should be updated by the bootloader.
		*/
		psci-area@4000000 {
		reg = <0 0x4000000 0 0x200000>;
		no-map;
		};
		};

		cpus {
		#address-cells = <1>;
		#size-cells = <0>;