From: Dinh Nguyen <dinguyen@xxxxxxxxxxxxxxxxxxxxx>
This patch adds a /memreserve/ section to reserve the first 4K for future
use by the system. One possible use-case is trampoline code used to bring
secondary cores online.
Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxxxxxxxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxxx>
---
v3: Update commit message based on Mark Rutland's comment
v2: Add a comment in the dts files
---
arch/arm/boot/dts/socfpga_arria5.dtsi | 2 ++
arch/arm/boot/dts/socfpga_cyclone5.dtsi | 2 ++
2 files changed, 4 insertions(+)
diff --git a/arch/arm/boot/dts/socfpga_arria5.dtsi b/arch/arm/boot/dts/socfpga_arria5.dtsi
index 468fc4c..03e8268 100644
--- a/arch/arm/boot/dts/socfpga_arria5.dtsi
+++ b/arch/arm/boot/dts/socfpga_arria5.dtsi
@@ -15,6 +15,8 @@
*/
/dts-v1/;
+/* First 4KB has trampoline code for secondary cores. */
+/memreserve/ 0x00000000 0x0001000;
#include "socfpga.dtsi"
/ {
diff --git a/arch/arm/boot/dts/socfpga_cyclone5.dtsi b/arch/arm/boot/dts/socfpga_cyclone5.dtsi
index 33cad8b..28c05e7 100644
--- a/arch/arm/boot/dts/socfpga_cyclone5.dtsi
+++ b/arch/arm/boot/dts/socfpga_cyclone5.dtsi
@@ -16,6 +16,8 @@
*/
/dts-v1/;
+/* First 4KB has trampoline code for secondary cores. */
+/memreserve/ 0x00000000 0x0001000;
#include "socfpga.dtsi"
/ {
--
2.0.3
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