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arm-bsp/u-boot: corstone1000: Reserve memory for RSS comm pointer access protocol

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This memory was used by OpenAMP to establish communication between
the Secure Enclave and Trusted Services. After transitioning from
OpenAMP to RSE_COMMS, this shared memory is now configured for the
pointer access protocol in RSE_COMMS.

Since this memory may be still used by a user-space application
in linux as U-Boot is passing an EFI memory map starting from
0x80000000, this memory range should be reserved as the
pointer access protocol may be enabled on corstone1000 in the future.

Signed-off-by: Philip Puk <philip.puk@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>
This commit is contained in:
Philip Puk
2025-02-04 15:05:27 +00:00
committed by Jon Mason
parent 34d326f107
commit d656275855
2 changed files with 47 additions and 0 deletions
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1
meta-arm-bsp/recipes-bsp/u-boot/u-boot-corstone1000.inc
View File

@@ -68,6 +68,7 @@ SRC_URI:append = " \
file://0050-fwu-Use-metadata-v2.patch \
${@bb.utils.contains('MACHINE_FEATURES', 'corstone1000-extsys', \
'', 'file://0051-corstone1000-purge-remoteproc-dts-node.patch' , d)} \
file://0052-reserve-memory-for-se-comm.patch \
"
do_configure:append() {

46
meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0052-reserve-memory-for-se-comm.patch Normal file
View File

@@ -0,0 +1,46 @@
From 8fdd91630f335b71e55e570a011f07b083c47dd6 Mon Sep 17 00:00:00 2001
From: Emekcan Aras <emekcan.aras@arm.com>
Date: Mon, 10 Jul 2023 19:00:43 +0100
Subject: [PATCH] arm-bsp/u-boot: Reserve memory for RSS comm pointer access protocol
This memory was used by OpenAMP to establish communication between
the Secure Enclave and Trusted Services. After transitioning from
OpenAMP to RSE_COMMS, this shared memory is now configured for the
pointer access protocol in RSE_COMMS.
Since this memory may be still used by a user-space application
in linux as U-Boot is passing an EFI memory map starting from
0x80000000, this memory range should be reserved as the
pointer access protocol may be enabled on corstone1000 in the future.
Upstream-Status: Pending [Not submitted to upstream yet]
Signed-off-by: Emekcan Aras <emekcan.aras@arm.com>
---
arch/arm/dts/corstone1000.dtsi | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm/dts/corstone1000.dtsi b/arch/arm/dts/corstone1000.dtsi
index 0f8ad255ce..a71b89c025 100644
--- a/arch/arm/dts/corstone1000.dtsi
+++ b/arch/arm/dts/corstone1000.dtsi
@@ -45,6 +45,17 @@
lba = <65536>;
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ smem_mem: smem_region@88000000 {
+ reg = <0x0 0x88000000 0x0 0x100000>;
+ no-map;
+ };
+ };
+
gic: interrupt-controller@1c000000 {
compatible = "arm,gic-400";
#interrupt-cells = <3>;
--
2.17.1