EDK II Platform Description (DSC) File Specification
Revision 1.28
12/01/2020 05:04:20
Acknowledgements
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Copyright (c) 2006-2017, Intel Corporation. All rights reserved.
Revision History
| Revision | Revision History | Date |
|---|---|---|
| 1.0 | Initial release. | December 2007 |
| 1.1 | Updated based on errata | August 2008 |
| 1.2 | Updated based on enhancement requests | June 2009 |
| 1.21 | Updated based on errata and enhancement requests | March 2010 |
| Added language filters: RFC_LANGUAGES and ISO_LANGUAGES | ||
| Added Note that a reserved macro name, MDEPKG_NDEBUG | ||
| Definitions in DSC file are now global to both DSC and FDF files | ||
| PCD Values may be constructed using C-style expressions provided the result of the expression matches the datum type of the PCD | ||
| FeatureFlagExpression is now defined as a C-style expression using C relational, equality and logical numeric and bitwise operators and/or arithmetic and bitwise operators that evaluate to a value that matches the Datum Type of the PCD. Precedence and associativity follow C standards | ||
| Spec changed to match existing formats: | ||
SUPPORTED_ARCHITECTURES and BUILD_TARGETS use the "|" separator, not the comma character |
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| 1.22 | Errata and grammatical changes | May 2010 |
| 1.22 w/ | Updates: | December 2011 |
| Errata A | Updated to support UEFI version 2.3.1 and updated spec release dates in Introduction | |
| Clarify UEFI's PI Distribution Package Specification | ||
| Standardize Common data definitions for all specifications | ||
| Grammatical, formatting and spelling changes | ||
| Replaced "should" with wording saying that it is "recommended" | ||
| Remove "$(WORKSPACE)/" from the examples | ||
| Removed content that only applied to the EDK build system and EDK DSC format that is not used by the EDK II build system | ||
| Rename $(TAGNAME) to $(TOOL_CHAIN_TAG) and remove the synonym $(TOOLCHAIN) | ||
| Added TIME_STAMP_FILE back into the [Defines] section | ||
| Added the SOURCE_OVERRIDE_PATH for EDK components (not valid for EDK II modules) | ||
| Added EDK_GLOBAL as a special type of MACRO statement only valid for EDK INF files | ||
| Added VPD_TOOL_GUID in [Defines] section | ||
| Allow the OUTPUT_DIRECTORY path to be either absolute or relative to the WORKSPACE | ||
| Revised EBNF for PCD sections to allow more precise definitions | ||
Added EBNF for <Extension> |
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Added EBNF for <Keyword> 3.9.x and renamed <LibInstanceMap> to <ClassInstanceMap> in 3.10. |
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| Require PCDs to use the full name, removing ShortPcdName from definitions | ||
Updated to clarify that a PCD cannot be used in multiple methods; a PCD can ONLY be used in one way, Also, the <PcdsDyanmic> sub section can only be used if the PCD is not listed in any of the common sections; All instances of the PCD must then use this method |
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| Revised grammar and include additional clarifications for conditional directives and macro usage; clarify PCD usage in conditional directives and expressions - the $(PcdName) format is never used | ||
| Fixed VPD PCD format; allow the MAX size value to use a wildcard character & added info about where it comes from; added appendix for BPDG file formats; renamed some PCD example tokens and PCD names; cleaned up the sample DSC file | ||
Removed invalid [|MaximumDatumSize] for HII PCDs in section 2.2.13.3 |
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| Document where VOID* lengths are derived from when not specified in the DSC file | ||
| Clarify that C data arrays must be byte arrays for PCD value fields; both C format and Registry format GUIDs structures are not permitted in VOID* PCD value fields | ||
| Removed the SET statement, used to define values for PCDs from all sections of this document. The SET statement is only valid in FDF files | ||
| Specify how sections are merged during parsing of the EDK II meta-data files | December 2011 | |
| Specifically state how [BuildOptions] content should be applied; define how [BuildOptions] sections are merged | ||
| Clarify where macros are evaluated/expanded | ||
| Provide rules for how macros can be used in different BuildOptions sections | ||
| Clarify Macros in [Defines] section can automatically be used in FDF files. | ||
| Removed references to system environment variables in the Macros section | ||
| Updated conditional rules in 2.2.7 for how to use macro and PCDs; change #elif to #elseif in 3.2.3 to match implementation | ||
Added the "IN" operator as an Equality Operator - added description and restriction of it's usage using <MemberExpression> |
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| Corrected [Defines] section information, changed format of for paths, directories and files in common section | ||
| Added table of valid environment variables that can be used in this file | ||
Make sure that macros are not restricted to directory/path usage - also update EBNF to specifically show MACROVAL - Added <Filename> to macro values. |
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Removed unused <VALUE> EBNF from [Defines] section |
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| Prohibit macros in the filename specified in !include statements; clarify the rules for finding the !include files | ||
| Clarify how macros can be shared between sections | ||
| 1..22 w/ | Updates: | June 2012 |
| Errata B | Section 3.2.1 Fixed the DOS EOL character sequence | |
| Section 1.2 and 1.3, Updated specs to include current errata versions | ||
| Section 3.2.1 Removed reference to the LineExtension parameter description;1 line entries in the DSC file cannot be extended to multiple lines | ||
Section 3.2.2 Prohibit macros that replace or define tokens that are defined in this specification, as well as to prohibit <EOL> characters in a macro's value field |
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Section 3.4 Revised the value of the BuildNumber to be a NumValUint16, per the PI Specification |
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Section 2.8, fix precedence description for obtaining the length of a VOID* PCD: DSC, INF, DEC |
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| Section 1.3 and 1.4, updated UEFI PI Distribution Package Specification Errata from A to B | ||
| Section 2.2.8,and 3.2.3 Clarify PCD usage in conditional directive statements | ||
| Section 2.3, and 3.4 Clarify location of FDF file | ||
| 1.22 w/ | Updates: | August 2013 |
| Errata C | Sections 1.3 and 1.4 updated UEFI specification versions | |
| Sections 2.2.8 and 3.2.3 Clarify PCD usage in conditional directive statements | ||
| Sections 2.3 and 3.4, Clarify location of FDF file | ||
| Section 2.8, fixed precedence description for obtaining the length of VOID* PCDs | ||
| Section 3.2.1 Fixed DOS EOL Character Sequence | ||
| Section 3.2.1 Removed reference to the LineExtension parameter description; 1 line entries in the DSC file cannot be extended to multiple lines. | ||
| Section 3.2.1 Require C format for all arrays using curly braces around the byte elements in an array | ||
Section 3.2.2 Prohibit macros that replace or define tokens that are defined in this specification, as well as to prohibit <EOL> characters in a macro's value field |
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| Section 3.4, Revised the value of the BUILD_NUMBER to be NumValUint16, per the PI Specification | ||
| Section 3.8 Restrict the size of the HiiOffset to a UINT16 | ||
| Appendix D, Added VPD data file examples. | ||
| Various locations, replaced UCS-2 with UCS-2LE | ||
| 1.24 | Updates: | December 2014 |
| Changed specification from 1.22 Errata C to 1.24. | ||
| Allow specifying the DSC_SPECIFICATION as either 0x00010018 or 1.24. | ||
| Updates specification dates in 1.2 and added new specifications. | ||
| Removed Expression syntax with reference to external document. | ||
| Provide information on how to build multiple instances of a single module. | ||
| Updated the Terms in 1.3. | ||
| 1.24 w/ | Updates: | March 2015 |
| Errata A | Update link to the EDK II Specifications, fixed the name of the Multi-String .UNI File Format Specification | |
| 1.25 | Updates: | June 2015 |
| Updated support for UEFI 2.5 and PI 1.4 | ||
| Added clarification regarding the use of .. and . in path names in section 2 | ||
| In section 2.8.3.7, added clarification regarding allocation of memory based on calculation of maximum size for VOID* PCD entries when the maximum size is not specified in the DSC file | ||
In section 3.6 added optional <Edk2ModuleType> element to the section header in order to support UEFI 2.5 Runtime Drivers that must be 4K page aligned |
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| Also in 3.6, updated the priority of [BuildOptions] to match current implementation that follows the Build Specification | ||
| In sections 2.3 and 3.5, added new [Defines] boolean entry PCD_VAR_CHECK_GENERATION | ||
| In sections 2.9.3.2, 2.9.3.5, 3.10.4 and 3.10.5 added HII Attribute entry. | ||
| Since the above changes are new features, update the minor revision of the DSC_SPECIFICATION to 0x00010019, older DSC files that do not use the new features do not need to modify the DSC_SPECIFICATION values | ||
| Added clarification on when the DSC_SPECIFICATION value must be updated to 0x00010019 | ||
| 1.26 | Specification revision to 1.26 | January 2016 |
| Update the DSC_SPECIFICATION version to 0x0001001A | ||
| Revised WORKSPACE wording for updated build system that can handle packages located outside of the WORKSPACE directory tree (refer to the TianoCore.org/ EDKII website for additional instructions on setting up a development environment). | ||
| Added new system environment variables used by the build system. | ||
| 1.27 | Convert to GitBooks | June 2017 |
| #351 [DSC Spec] Extend macro usage in the !include statement | ||
| #484 DSC spec: support Prebuild and Postbuild in the [Defines] section | ||
| #353 Build spec: Allow nested includes in DSC and FDF files | ||
| #521 DSC spec: add clarification for mixed PCD usage in the DSC spec | ||
| #519 DSC Spec: update Precedence of PCD Values | ||
| #584 DSC Spec: Update the DSC_SPECIFICATION version to 0x0001001B or 1.27 | ||
| #645 DSC Spec: Remove Restriction on Using NULL in [LibraryClasses] Section | ||
| #669 DSC Spec: Add multi-arg support to PREBUILD/POSTBUILD | ||
| #597 DSC Spec: Hii type Pcd VariableName is NOT allowed to be empty string | ||
| 1.28 | Update Version to 1.28 | Mar 2018 |
| Update Skuid value to support Hex number | ||
| Add flexible PCD value format into spec | ||
| Add syntax to support SKU ID inherit from another SKU ID | ||
| Add DefaultStores section to describe the default setting | ||
| Add structure PCD field value assignment syntax |