From mboxrd@z Thu Jan 1 00:00:00 1970 From: dinguyen@opensource.altera.com (dinguyen at opensource.altera.com) Date: Mon, 25 Aug 2014 07:37:11 -0500 Subject: [PATCHv3 3/3] ARM: dts: socfpga: memreserve first 4KB for future system use In-Reply-To: <1408970231-4316-1-git-send-email-dinguyen@opensource.altera.com> References: <1408970231-4316-1-git-send-email-dinguyen@opensource.altera.com> Message-ID: <1408970231-4316-4-git-send-email-dinguyen@opensource.altera.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Dinh Nguyen 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 Acked-by: Pavel Machek --- 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