audk/EmbeddedPkg
Laszlo Ersek 65a69b2148 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>
2017-03-28 14:10:46 +02:00
..
Application/AndroidFastboot EmbeddedPkg/AndroidFastboot: drop dependency on the LinuxLoader 2016-11-25 12:56:10 +00:00
Drivers EmbeddedPkg/AndroidFastbootTransportTcpDxe: remove broken hostname handling 2016-10-28 13:51:22 +01:00
Ebl EmbeddedPkg/Ebl: eliminate deprecated string function calls 2016-10-28 15:53:59 +01:00
EblExternCmd ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
EmbeddedMonotonicCounter ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
GdbStub EmbeddedPkg: Fix typos in comments 2016-10-19 16:31:58 +01:00
Include EmbeddedPkg: introduce EDKII Platform Has Device Tree GUID 2017-03-28 14:10:46 +02:00
Library EmbeddedPkg: introduce PlatformHasAcpiLib 2017-03-28 14:07:38 +02:00
MetronomeDxe ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
RealTimeClockRuntimeDxe EmbeddedPkg/RTC: use returned status at init-time 2016-03-25 07:09:49 +01:00
ResetRuntimeDxe ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
Scripts/LauterbachT32 EmbeddedPkg: Rectify file modes 2016-02-02 11:42:51 +00:00
SimpleTextInOutSerial ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
TemplateSec ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
Universal/MmcDxe EmbeddedPkg/MmcDxe: expand to support multiple blocks 2016-11-24 16:29:04 +00:00
Contributions.txt */Contributions.txt: Update example email address 2015-02-03 17:29:14 +00:00
EmbeddedPkg.dec EmbeddedPkg: introduce EDKII Platform Has Device Tree GUID 2017-03-28 14:10:46 +02:00
EmbeddedPkg.dsc EmbeddedPkg: Remove use of IntelFrameworkModulePkg legacy libs 2016-12-05 15:53:30 +00:00
EmbeddedPkg.fdf ARM Packages: Removed trailing spaces 2014-08-19 13:29:52 +00:00
License.txt EmbeddedPkg: Rectify file modes 2016-02-02 11:42:51 +00:00