From: Laszlo Ersek <lersek@redhat.com>
To: edk2-devel-01 <edk2-devel@lists.01.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Leif Lindholm <leif.lindholm@linaro.org>
Subject: [PATCH v3 06/12] EmbeddedPkg: introduce EDKII Platform Has Device Tree GUID
Date: Fri, 24 Mar 2017 23:38:13 +0100 [thread overview]
Message-ID: <20170324223819.11377-7-lersek@redhat.com> (raw)
In-Reply-To: <20170324223819.11377-1-lersek@redhat.com>
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>
---
Notes:
v3:
- move GUID from ArmPkg to EmbeddedPkg [Leif]
- apply the protocol -> generic GUID changes to naming, comments, and
the commit message, that were suggested by Star for the MdeModulePkg /
ACPI counterpart
EmbeddedPkg/EmbeddedPkg.dec | 3 ++
EmbeddedPkg/Include/Guid/PlatformHasDeviceTree.h | 35 ++++++++++++++++++++
2 files changed, 38 insertions(+)
diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec
index 2c2cf41103c2..002b053a921a 100644
--- a/EmbeddedPkg/EmbeddedPkg.dec
+++ b/EmbeddedPkg/EmbeddedPkg.dec
@@ -56,6 +56,9 @@ [Guids.common]
gFdtHobGuid = { 0x16958446, 0x19B7, 0x480B, { 0xB0, 0x47, 0x74, 0x85, 0xAD, 0x3F, 0x71, 0x6D } }
gFdtVariableGuid = { 0x25a4fd4a, 0x9703, 0x4ba9, { 0xa1, 0x90, 0xb7, 0xc8, 0x4e, 0xfb, 0x3e, 0x57 } }
+ ## 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 } }
diff --git a/EmbeddedPkg/Include/Guid/PlatformHasDeviceTree.h b/EmbeddedPkg/Include/Guid/PlatformHasDeviceTree.h
new file mode 100644
index 000000000000..a9bc51270cda
--- /dev/null
+++ b/EmbeddedPkg/Include/Guid/PlatformHasDeviceTree.h
@@ -0,0 +1,35 @@
+/** @file
+ EDKII Platform Has Device Tree GUID
+
+ A NULL protocol instance with this GUID in the DXE protocol database, and/or
+ a NULL PPI with this GUID in the PPI database, implies that the platform
+ provides the operating system with a Device Tree-based hardware description.
+ Note that this is not necessarily exclusive with different kinds of hardware
+ description (for example, an ACPI-based one). A platform driver and/or PEIM
+ is supposed to produce a single instance of the protocol and/or PPI (with
+ NULL contents), if appropriate.
+
+ Copyright (C) 2017, Red Hat, Inc.
+
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License that accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+
+
+#ifndef __EDKII_PLATFORM_HAS_DEVICE_TREE_H__
+#define __EDKII_PLATFORM_HAS_DEVICE_TREE_H__
+
+#define EDKII_PLATFORM_HAS_DEVICE_TREE_GUID \
+ { \
+ 0x7ebb920d, 0x1aaf, 0x46d9, \
+ { 0xb2, 0xaf, 0x54, 0x1e, 0x1d, 0xce, 0x14, 0x8b } \
+ }
+
+extern EFI_GUID gEdkiiPlatformHasDeviceTreeGuid;
+
+#endif
--
2.9.3
next prev parent reply other threads:[~2017-03-24 22:38 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-24 22:38 [PATCH v3 00/12] ArmVirtPkg: don't forward the DT to the OS if QEMU provides ACPI Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 01/12] Revert "ArmVirtPkg/FdtClientDxe: make DT table installation !ACPI dependent" Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 02/12] Revert "ArmVirtPkg/FdtClientDxe: install DT configuration table at ReadyToBoot" Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 03/12] ArmVirtPkg/XenAcpiPlatformDxe: don't cast UINT64 to pointer directly Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 04/12] MdeModulePkg: introduce EDKII Platform Has ACPI GUID Laszlo Ersek
2017-03-24 22:41 ` Ard Biesheuvel
2017-03-28 8:20 ` Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 05/12] ArmPkg: introduce PlatformHasAcpiLib Laszlo Ersek
2017-03-24 22:42 ` Ard Biesheuvel
2017-03-24 22:38 ` Laszlo Ersek [this message]
2017-03-24 22:42 ` [PATCH v3 06/12] EmbeddedPkg: introduce EDKII Platform Has Device Tree GUID Ard Biesheuvel
2017-03-24 22:38 ` [PATCH v3 07/12] ArmVirtPkg: add PlatformHasAcpiDtDxe Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 08/12] ArmVirtPkg: add XenPlatformHasAcpiDtDxe Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 09/12] ArmVirtPkg: enable AcpiTableDxe and EFI_ACPI_TABLE_PROTOCOL dynamically Laszlo Ersek
2017-03-24 22:43 ` Ard Biesheuvel
2017-03-24 22:38 ` [PATCH v3 10/12] ArmVirtPkg/FdtClientDxe: install DT as sysconfig table in protocol notify Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 11/12] ArmVirtPkg/PlatformHasAcpiDtDxe: don't expose DT if QEMU provides ACPI Laszlo Ersek
2017-03-24 22:38 ` [PATCH v3 12/12] ArmVirtPkg: remove PURE_ACPI_BOOT_ENABLE and PcdPureAcpiBoot Laszlo Ersek
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