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author | Laszlo Ersek <lersek@redhat.com> | 2017-03-17 13:47:35 +0100 |
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committer | Laszlo Ersek <lersek@redhat.com> | 2017-03-28 14:10:46 +0200 |
commit | 65a69b21484056794165e5a884e3142120ad61fc (patch) | |
tree | d8a86fa6bd9a0aa21a0a6bd6475a095caa216639 /EmbeddedPkg/EmbeddedPkg.dec | |
parent | 786f476323a6795354aa3269c556c8c234525052 (diff) | |
download | edk2-65a69b21484056794165e5a884e3142120ad61fc.tar.gz edk2-65a69b21484056794165e5a884e3142120ad61fc.tar.bz2 edk2-65a69b21484056794165e5a884e3142120ad61fc.zip |
EmbeddedPkg: introduce EDKII Platform Has Device Tree GUID
The presence of this GUID in the PPI database, and/or in the DXE protocol
database (as dictated by the platform's needs in these firmware phases)
implies that the platform provides the operating system with a Device
Tree-based hardware description. This is not necessarily exclusive with
other types of hardware description (for example, an ACPI-based one).
A platform PEIM and/or DXE driver is supposed to produce a single instance
of the PPI and/or protocol (with NULL contents), if appropriate. The
decision to produce the PPI and/or protocol is platform specific; for
example, in the DXE phase, it could depend on an HII checkbox / underlying
non-volatile UEFI variable.
In the DXE phase, the protocol is meant to be consumed by the platform
driver that
- owns the Device Tree description of the hardware, and
- is responsible for installing it as a system configuration table.
Said FDT-owner driver can wait for the protocol via DEPEX or protocol
notify.
Because this GUID is not standard, it is prefixed with EDKII / Edkii, as
seen elsewhere (for example in MdeModulePkg and SecurityPkg).
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Diffstat (limited to 'EmbeddedPkg/EmbeddedPkg.dec')
-rw-r--r-- | EmbeddedPkg/EmbeddedPkg.dec | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec index d078bf794a..29736fb4a7 100644 --- a/EmbeddedPkg/EmbeddedPkg.dec +++ b/EmbeddedPkg/EmbeddedPkg.dec @@ -59,6 +59,9 @@ ## Include/Guid/PlatformHasAcpi.h
gEdkiiPlatformHasAcpiGuid = { 0xf0966b41, 0xc23f, 0x41b9, { 0x96, 0x04, 0x0f, 0xf7, 0xe1, 0x11, 0x96, 0x5a } }
+ ## Include/Guid/PlatformHasDeviceTree.h
+ gEdkiiPlatformHasDeviceTreeGuid = { 0x7ebb920d, 0x1aaf, 0x46d9, { 0xb2, 0xaf, 0x54, 0x1e, 0x1d, 0xce, 0x14, 0x8b } }
+
[Protocols.common]
gHardwareInterruptProtocolGuid = { 0x2890B3EA, 0x053D, 0x1643, { 0xAD, 0x0C, 0xD6, 0x48, 0x08, 0xDA, 0x3F, 0xF1 } }
gEfiDebugSupportPeriodicCallbackProtocolGuid = { 0x9546e07c, 0x2cbb, 0x4c88, { 0x98, 0x6c, 0xcd, 0x34, 0x10, 0x86, 0xf0, 0x44 } }
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