From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=217.140.101.70; helo=foss.arm.com; envelope-from=chandni.cherukuri@arm.com; receiver=edk2-devel@lists.01.org Received: from foss.arm.com (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by ml01.01.org (Postfix) with ESMTP id 4EE33209605C9 for ; Sun, 17 Jun 2018 22:29:37 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 686AD80D; Sun, 17 Jun 2018 22:29:37 -0700 (PDT) Received: from usa.arm.com (a73437-lin.blr.arm.com [10.162.0.155]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1DF7D3F59D; Sun, 17 Jun 2018 22:29:35 -0700 (PDT) From: Chandni Cherukuri To: edk2-devel@lists.01.org Cc: ard.biesheuvel@linaro.org, leif.lindholm@linaro.org Date: Mon, 18 Jun 2018 10:58:59 +0530 Message-Id: <1529299741-30054-1-git-send-email-chandni.cherukuri@arm.com> X-Mailer: git-send-email 2.7.4 Subject: [PATCH edk2-platforms v3 0/2] Platform/ARM/Sgi: Enable Dynamic Configuration feature X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Jun 2018 05:29:38 -0000 Changes since v2: - Addressed comments from Ard - Depex on gHwConfigDtInfoPpiGuid - Use address of DT instead of pointer to the address of DT Changes since v1: - Addressed comments from Ard and Leif - move definition of HwConfigDtBlob to PlatformLib.c - use adr instead of ldr assembly instruction - declare PPI in a PPI specific header file - invert if conditional expression - remove changes unrelated to the patch - rename PEI files as per the standard On SGI platforms, the trusted firmware executes prior to the SEC phase. It supplies to the SEC phase, a pointer to a HW CONFIG fdt in the x1 which contains platform specific information such as part number and config number of the SGI platform. The HW CONFIG FDT would look as, /dts-v1/; / { /* compatible string */ compatible = "arm,sgi-isys3"; /* platform ID node */ system-id { platform-id = <0x03000783>; } }; In the very first step of the assembly code which executes in SEC phase the fdt pointer is stored in a global variable from the register. A PPI is created during the SEC phase which stores the global variable. During PEI phase, a Platform ID PEIM is installed which accessess the PPI and retrieves the platform information using FDT helper functions and a PlatformId HOB is created and populated with the information. During DXE phase the drivers can access the Platform ID HOB to get the platform information and perform platform specific functions based on the platform. Chandni Cherukuri (2): Platform/ARM/Sgi: Install a Platform ID HOB Platform/ARM/Sgi: Pick ACPI tables to install based on platform ID Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.c | 30 +++++- Platform/ARM/SgiPkg/Drivers/PlatformDxe/PlatformDxe.inf | 2 + Platform/ARM/SgiPkg/Include/Ppi/SgiPlatformId.h | 23 ++++ Platform/ARM/SgiPkg/Include/SgiPlatform.h | 13 +++ Platform/ARM/SgiPkg/Library/PlatformLib/AArch64/Helper.S | 13 ++- Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.c | 10 ++ Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf | 3 + Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPei.inf | 40 +++++++ Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPeim.c | 112 ++++++++++++++++++++ Platform/ARM/SgiPkg/SgiPlatform.dec | 5 + Platform/ARM/SgiPkg/SgiPlatform.dsc | 1 + Platform/ARM/SgiPkg/SgiPlatform.fdf | 1 + 12 files changed, 245 insertions(+), 8 deletions(-) create mode 100644 Platform/ARM/SgiPkg/Include/Ppi/SgiPlatformId.h create mode 100644 Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPei.inf create mode 100644 Platform/ARM/SgiPkg/Library/SgiPlatformPei/SgiPlatformPeim.c -- 2.7.4