Mike:
For GUID C Name in DEC file, how to find its value? Or require it be defined
in the same package.
For VOID* byte array, could we support the usage to set the value in the
specified offset. For example, VOID* { 0, 1, 2, OFFSET(8) 3, 4, 5 }
Thanks
Liming
> -----Original Message-----
> From: edk2-devel [mailto:[email protected]] On Behalf Of
> Kinney, Michael D
> Sent: Thursday, June 23, 2016 8:28 AM
> To: [email protected]; Kinney, Michael D <[email protected]>
> Subject: [edk2] [RFC V2] Add more flexible PCD value formats in
> DEC/INF/DSC/FDF files
>
> Hi
>
> I have updated this RFC to V2 that includes a concepts provided by
> Tim Lewis that includes extensions to initialize a VOID* PCD that
> cannot be described with a C structure (e.g. UEFI Load Option).
>
> The changes for V2 are:
>
> * Update examples to cover new syntax cases
> * Clarify that this proposal is for PCD values in DEC/INF/DSC/FDF
> files. Not just DEC/DSC.
> * Add support for multi character ASCII and UCS16 char constants
> and strings for VOID* PCD byte arrays
> * Add support for GUID() macro in VOID* PCD byte arrays
> * Add support for DEVICE_PATH() macro in VOID* PCD byte arrays
> * Add support for LABEL() and OFFSET_OF() macros in VOID* PCD
> byte arrays.
> * Add support for expressions to compute values.
>
> <proposal>
>
> I would like to propose more flexible value formats for PCDs
> in DEC/INF/DSC/FDF files and --pcd command line option.
>
> This would include the following additions:
>
> * ASCII character values using single quotes(e.g. 'A').
> * ASCII multi-character values using single quotes(e.g. 'ABCD').
> No null-terminator.
> * UCS16 character values using L and single quotes(e.g. L'A').
> * UCS16 multi-character values using L and single quotes(e.g. L'ABCD').
> No null-terminator.
> * Support TRUE/FALSE for UINT8/16/32/64 values
> * Support TRUE/FALSE in VOID* byte array
> * Support decimal values in VOID* byte array
> * Support ASCII single quote character values in VOID* byte arrays
> * Support byte arrays, ASCII string, Unicode String,
> ASCII multi-character strings, UCS16 multi-character strings for
> UINT8/16/32/64 values as long as they fit in the target type.
> * Support multi-character values using single quotes(e.g. 'ABCD') in
> VOID* byte arrays that are expanded to a sequence of byte values.
> * Support multi-character values using double quotes(e.g. "ABCD") in
> VOID* byte arrays that are expanded to a sequence of byte values.
> * Support UCS16 multi-character values using L and single quotes(e.g.
> L'ABCD')
> in VOID* byte arrays that are expanded to a sequence of byte values.
> * Support UCS16 multi-character values using L and double quotes(e.g.
> L"ABCD")
> in VOID* byte arrays that are expanded to a sequence of byte values.
> * Support UINT8(), UINT16, UINT32(), and UINT64() macros in
> VOID* byte arrays that are expanded to a sequence of byte values.
> * Support GUID() macro in VOID* byte arrays that are expanded to a
> sequence of 16 byte values. The GUID() operand supports Registry
> format GUIDs, C struct style GUIDs, and GUID C names.
> * Support DEVICE_PATH() macro in VOID* byte arrays that are expanded
> to a sequence of byte values. The DEVICE_PATH() operand is a
> double quoted string that follow the device path as string format
> defined in UEFI Specification 2.6 Section 9.6.
> * Support LABEL() macro in VOID* byte arrays to tag the byte
> offset of a location in a VOID* byte array.
> * Support OFFSET_OF() macro in VOID* byte arrays that returns the
> byte offset of a LABEL() declared in a VOID* byte array.
> * Support infix expressions that return an integer result that can
> be used to compute a PCD value with support for
> (, ), +, -, *, /, %, ~, &, |, ^ operators.
>
> Some examples of this additional flexibility are:
> BOOLEAN TRUE
> BOOLEAN FALSE
> BOOLEAN 0
> BOOLEAN 1
> BOOLEAN {0}
> BOOLEAN {1}
> UINT8 TRUE
> UINT8 FALSE
> UINT8 0x12
> UINT8 12
> UINT8 'A'
> UINT8 {TRUE}
> UINT8 {0x12}
> UINT8 {'A'}
> UINT8 (6 + 6)
> UINT16 TRUE
> UINT16 0x1234
> UINT16 1234
> UINT16 'AB'
> UINT16 "A"
> UINT16 L'A'
> UINT16 {0x34, TRUE}
> UINT16 {27, FALSE}
> UINT16 {'A', 'B'}
> UINT16 ('A' - 0x02)
> UINT32 FALSE
> UINT32 0x12345678
> UINT32 12345678
> UINT32 "ABC"
> UINT32 L"A"
> UINT32 'ABCD'
> UINT32 L'AB'
> UINT32 {0x12, 27, TRUE, 'A'}
> UINT32 ((5 * 0x100) / 0x10)
> UINT64 FALSE
> UINT64 0x1234567812345678
> UINT64 1234567812345678
> UINT64 "ABCDEFG"
> UINT64 L"ABC"
> UINT64 'ABCDEFGH'
> UINT64 L'ABCD'
> UINT64 {0x12, 27, TRUE, FALSE, 'A', 'B', 'C', 'D'}
> UINT64 (0x12345678 & 0xff00)
> VOID* {0x1, 0x2, 0x3}
> VOID* {10, 11, 12, 13, 14}
> VOID* {'X', 'Y', 'Z'}
> VOID* {TRUE, FALSE, FALSE, TRUE}
> VOID* {0x41, 0x42, 67, 68, 'E', 'F', TRUE, FALSE}
> VOID* { UINT8(7), UINT16(8), UINT32(0x27), UINT64(0x1234567812345678) }
> VOID* { 'AB', L'AB', "AB", L"AB" }
> VOID* { GUID("11E13869-1896-4A07-8B21-D8B23DD2A2B4") }
> VOID* { GUID({ 0x11e13869, 0x1896, 0x4a07, { 0x8b, 0x21, 0xd8, 0xb2, 0x3d,
> 0xd2, 0xa2, 0xb4 } }) }
> VOID* { GUID(gEfiBlockIoProtocolGuid) }
> VOID* { DEVICE_PATH("PciRoot(0)/Pci(0,0)") }
> VOID* { 0, 1, 2, LABEL(Start) 3, 4, 5, LABEL(End) 6, UINT8(OFFSET_OF(End)
> -
> OFFSET_OF(Start)) }
>
> </proposal>
>
> Mike
>
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