From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id CC93821AE3CD1 for ; Tue, 30 May 2017 23:07:00 -0700 (PDT) Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP; 30 May 2017 23:08:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,422,1491289200"; d="scan'208";a="107364854" Received: from fmsmsx103.amr.corp.intel.com ([10.18.124.201]) by orsmga005.jf.intel.com with ESMTP; 30 May 2017 23:08:00 -0700 Received: from fmsmsx118.amr.corp.intel.com (10.18.116.18) by FMSMSX103.amr.corp.intel.com (10.18.124.201) with Microsoft SMTP Server (TLS) id 14.3.319.2; Tue, 30 May 2017 23:07:59 -0700 Received: from shsmsx102.ccr.corp.intel.com (10.239.4.154) by fmsmsx118.amr.corp.intel.com (10.18.116.18) with Microsoft SMTP Server (TLS) id 14.3.319.2; Tue, 30 May 2017 23:07:59 -0700 Received: from shsmsx103.ccr.corp.intel.com ([169.254.4.116]) by shsmsx102.ccr.corp.intel.com ([169.254.2.146]) with mapi id 14.03.0319.002; Wed, 31 May 2017 14:07:56 +0800 From: "Zhu, Yonghong" To: "Kinney, Michael D" , "edk2-devel@lists.01.org" CC: "Gao, Liming" , "Shaw, Kevin W" , "Zhu, Yonghong" Thread-Topic: [edk2-DscSpecification PATCH v2] Update Precedence of PCD Values Thread-Index: AQHS2dNFhkYfgekGCEargyl7uIbuPqINbKUAgACIC5A= Date: Wed, 31 May 2017 06:07:56 +0000 Message-ID: References: <1496210428-49364-1-git-send-email-michael.d.kinney@intel.com> <1496210428-49364-2-git-send-email-michael.d.kinney@intel.com> In-Reply-To: <1496210428-49364-2-git-send-email-michael.d.kinney@intel.com> Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] MIME-Version: 1.0 Subject: Re: [edk2-DscSpecification PATCH v2] Update Precedence of PCD Values X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 May 2017 06:07:01 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Reviewed-by: Yonghong Zhu =20 Best Regards, Zhu Yonghong -----Original Message----- From: Kinney, Michael D=20 Sent: Wednesday, May 31, 2017 2:00 PM To: edk2-devel@lists.01.org Cc: Gao, Liming ; Zhu, Yonghong ; Shaw, Kevin W Subject: [edk2-DscSpecification PATCH v2] Update Precedence of PCD Values https://bugzilla.tianocore.org/show_bug.cgi?id=3D519 Cc: Liming Gao Cc: Yonghong Zhu Cc: Kevin W Shaw Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael Kinney --- 2_dsc_overview/28_pcd_section_processing.md | 56 ++++++++++++++-----------= ---- README.md | 1 + 2 files changed, 29 insertions(+), 28 deletions(-) diff --git a/2_dsc_overview/28_pcd_section_processing.md b/2_dsc_overview/2= 8_pcd_section_processing.md index 0969b41..1adde81 100644 --- a/2_dsc_overview/28_pcd_section_processing.md +++ b/2_dsc_overview/28_pcd_section_processing.md @@ -320,45 +320,45 @@ string plus 1 byte for the null terminator, for L"str= ing" entries to be the length of the UCS-2 character string plus 2 bytes f= or the null terminator and the exact length of a byte array. =20 -Precedence for determining PCD values (high to low, last in position) is a= s -follows: +The values that are assigned to individual PCDs required by a build may=20 +come from different locations and different meta-data files. The=20 +following provides the precedence (high to low) to assign a value to a PCD= . =20 -* A PCD value defined by a MACRO, ("MacroName" in this example), and the M= acro - is defined on the command-line using -D MacroName=3DValue +* Command-line, `--pcd` flags (left most has higher priority) =20 -* A PCD value defined in the FDF file SET statements +* DSC file, FeatureFlag, PatchableInModule or FixedAtBuild PCD value=20 +defined + in the `[Components]` INF scoping `` section statements =20 -* A PCD value defined positionally in the FDF file +* FDF file, grammar describing automatic assignment of PCD values =20 -* A FeatureFlag, PatchableInModule or FixedAtBuild PCD value defined in th= e - `[Components]` INF scoping section +* FDF file, SET statements within a section =20 -* A FeatureFlag, PatchableInModule or FixedAtBuild PCD value defined in a = PCD - access method section with an architectural modifier (the access method = for a - PCD in a section with an architectural modifier takes precedence over an= y - other access method) +* FDF file, SET statement in the [Defines] section =20 -In this example, modules built for IA32 architecture, the PCD will use -Pa= tchableInModule access, while modules built for all other architectures, th= e -PCD will use the FixedAtBuild access method: +* DSC file, a PCD value defined in a PCD access method section with an + architectural modifier. =20 -```ini -[PcdsFixedAtBuild.common] - gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeMemorySize|1 - gEfiMdeModulePkgTokenSpaceGuid.PcdResetOnMemoryTypeInformationChange|FAL= SE + In this example, modules built for IA32 architecture, the PCD will=20 + use PatchableInModule access, while modules built for all other=20 + architectures, the PCD will use the FixedAtBuild access method: =20 -[PcdsPatchableInModule.IA32] - gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeMemorySize|1 - gEfiMdeModulePkgTokenSpaceGuid.PcdResetOnMemoryTypeInformationChange|FAL= SE -``` + ```ini + [PcdsFixedAtBuild.common] + gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeMemorySize|1 + =20 + gEfiMdeModulePkgTokenSpaceGuid.PcdResetOnMemoryTypeInformationChange|F + ALSE + + [PcdsPatchableInModule.IA32] + gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeMemorySize|1 + =20 + gEfiMdeModulePkgTokenSpaceGuid.PcdResetOnMemoryTypeInformationChange|F + ALSE + ``` =20 -* A PCD value defined in a PCD access method (item type) section for commo= n - architectures +* DSC file, A PCD value defined in a PCD access method (item type)=20 +global + `[Pcd*]` section for common architectures. =20 -* A PCD value defined in an INF (provided all INF files have defined the s= ame - value) +* INF file, PCD sections, Default Values (provided all INF files have=20 +defined + the same value) =20 -* A PCD default value defined in the DEC file that declares the PCD. +* DEC file, PCD sections, Default Values =20 ********** **Note:** Dynamic or DynamicEx PCD sections with architectural modifiers i= s not diff --git a/README.md b/README.md index eb6966f..5e2c17a 100644 --- a/README.md +++ b/README.md @@ -181,3 +181,4 @@ Copyright (c) 2006-2017, Intel Corporation. All rights = reserved. | | [#484](https://bugzilla.tianocore.org/show_bug.cgi?id=3D484= ) DSC spec: support Prebuild and Postbuild in the [Defines] section = = = | | | | [#353](https://bugzilla.tianocore.org/show_bug.cgi?id=3D353= ) Build spec: Allow nested includes in DSC and FDF files = = = | | | | [#521](https://bugzilla.tianocore.org/show_bug.cgi?id=3D521= ) DSC spec: add clarification for mixed PCD usage in the DSC spec = = = | | +| | [#519](https://bugzilla.tianocore.org/show_bug.cgi?id=3D519= ) DSC Spec: update Precedence of PCD Values = = = | | -- 2.6.3.windows.1