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[PATCHv3,3/3] ARM: dts: socfpga: memreserve first 4KB for future system use

Message ID 1408970231-4316-4-git-send-email-dinguyen@opensource.altera.com (mailing list archive)
State New, archived
Headers show

Commit Message

dinguyen@opensource.altera.com Aug. 25, 2014, 12:37 p.m. UTC 
From: Dinh Nguyen <dinguyen@opensource.altera.com>

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@opensource.altera.com>
Acked-by: Pavel Machek <pavel@denx.de>
---
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(+)
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Patch

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"
 
 / {