From: Philip Puk <[email protected]>
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 <[email protected]>
---
.../u-boot/u-boot-corstone1000.inc | 1 +
.../0052-reserve-memory-for-se-comm.patch | 46 +++++++++++++++++++
2 files changed, 47 insertions(+)
create mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0052-reserve-memory-for-se-comm.patch
diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot-corstone1000.inc b/meta-arm-bsp/recipes-bsp/u-boot/u-boot-corstone1000.inc
index 2470db02..bb9da10d 100644
--- a/meta-arm-bsp/recipes-bsp/u-boot/u-boot-corstone1000.inc
+++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot-corstone1000.inc
@@ -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() {
diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0052-reserve-memory-for-se-comm.patch b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0052-reserve-memory-for-se-comm.patch
new file mode 100644
index 00000000..73fdc4bd
--- /dev/null
+++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0052-reserve-memory-for-se-comm.patch
@@ -0,0 +1,46 @@
+From 8fdd91630f335b71e55e570a011f07b083c47dd6 Mon Sep 17 00:00:00 2001
+From: Emekcan Aras <[email protected]>
+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 <[email protected]>
+
+---
+ 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
--
2.25.1
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