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| author | Ruiyu Ni <ruiyu.ni@intel.com> | 2017-08-04 13:10:59 +0800 |
|---|---|---|
| committer | Ruiyu Ni <ruiyu.ni@intel.com> | 2017-08-28 16:47:04 +0800 |
| commit | e457c1f65d187f58272c1dc98ae338b4f221ee41 (patch) | |
| tree | 7a69f05adddc290482ed279f9ff06ecdee58cd51 /MdePkg/Include/Library | |
| parent | c9c270193a8f1d64d9664bd191ab57e217206996 (diff) | |
| download | edk2-e457c1f65d187f58272c1dc98ae338b4f221ee41.zip edk2-e457c1f65d187f58272c1dc98ae338b4f221ee41.tar.gz edk2-e457c1f65d187f58272c1dc98ae338b4f221ee41.tar.bz2 | |
MdePkg/PciSegmentInfoLib: Add PciSegmentInfoLib class and instance.
The patch adds PciSegmentInfoLib library class which is used
by PciSegmentLib (commit in next patch) to support multiple
segment PCI configuration access.
BasePciSegmentInfoLibNull instance is added but it shouldn't be
used by any real platform.
Any single segment platform that wants to use PciSegmentLib could
use BasePciSegmentLibPci instance.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Diffstat (limited to 'MdePkg/Include/Library')
| -rw-r--r-- | MdePkg/Include/Library/PciSegmentInfoLib.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/PciSegmentInfoLib.h b/MdePkg/Include/Library/PciSegmentInfoLib.h new file mode 100644 index 0000000..588269a --- /dev/null +++ b/MdePkg/Include/Library/PciSegmentInfoLib.h @@ -0,0 +1,41 @@ +/** @file
+ Provides services to return segment information on a platform with multiple PCI segments.
+
+ This library is consumed by PciSegmentLib to support multiple segment PCI configuration access.
+
+ Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which 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 __PCI_SEGMENT_INFO_LIB__
+#define __PCI_SEGMENT_INFO_LIB__
+
+typedef struct {
+ UINT16 SegmentNumber; ///< Segment number.
+ UINT64 BaseAddress; ///< ECAM Base address.
+ UINT8 StartBusNumber; ///< Start BUS number, for verifying the PCI Segment address.
+ UINT8 EndBusNumber; ///< End BUS number, for verifying the PCI Segment address.
+} PCI_SEGMENT_INFO;
+
+/**
+ Return an array of PCI_SEGMENT_INFO holding the segment information.
+
+ Note: The returned array/buffer is owned by callee.
+
+ @param Count Return the count of segments.
+
+ @retval A callee owned array holding the segment information.
+**/
+PCI_SEGMENT_INFO *
+GetPciSegmentInfo (
+ UINTN *Count
+ );
+
+#endif
|