diff options
Diffstat (limited to 'Platform/Intel/MinPlatformPkg/Pci/Library/PciSegmentInfoLibSimple/PciSegmentInfoLibSimple.c')
-rw-r--r-- | Platform/Intel/MinPlatformPkg/Pci/Library/PciSegmentInfoLibSimple/PciSegmentInfoLibSimple.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/Platform/Intel/MinPlatformPkg/Pci/Library/PciSegmentInfoLibSimple/PciSegmentInfoLibSimple.c b/Platform/Intel/MinPlatformPkg/Pci/Library/PciSegmentInfoLibSimple/PciSegmentInfoLibSimple.c new file mode 100644 index 0000000000..a7e09f16b8 --- /dev/null +++ b/Platform/Intel/MinPlatformPkg/Pci/Library/PciSegmentInfoLibSimple/PciSegmentInfoLibSimple.c @@ -0,0 +1,60 @@ +/** @file
+ Default PCI Segment Information Library that returns one segment whose
+ segment base address equals to PcdPciExpressBaseAddress.
+
+ 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.
+
+**/
+
+#include <Base.h>
+#include <Library/PciSegmentInfoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/PcdLib.h>
+
+#define PCI_SEGMENT_INFO_HOB_GUID { \
+ 0x6eab7169, 0x9b21, 0x450e, 0x99, 0xe8, 0xe, 0xb1, 0x1b, 0x7d, 0xfe, 0xcb \
+ }
+
+EFI_GUID mPciSegmentInfoHobGuid = PCI_SEGMENT_INFO_HOB_GUID;
+
+/**
+ 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 *
+EFIAPI
+GetPciSegmentInfo (
+ OUT UINTN *Count
+ )
+{
+ VOID *Hob;
+ PCI_SEGMENT_INFO *PciSegmentInfo;
+
+ *Count = 1;
+ Hob = GetFirstGuidHob (&mPciSegmentInfoHobGuid);
+ if (Hob != NULL) {
+ PciSegmentInfo = GET_GUID_HOB_DATA(Hob);
+ } else {
+ PciSegmentInfo = BuildGuidHob (&mPciSegmentInfoHobGuid, sizeof(PCI_SEGMENT_INFO));
+ ASSERT(PciSegmentInfo != NULL);
+ PciSegmentInfo->SegmentNumber = 0;
+ PciSegmentInfo->BaseAddress = PcdGet64(PcdPciExpressBaseAddress);
+ PciSegmentInfo->StartBusNumber = 0;
+ PciSegmentInfo->EndBusNumber = 0xFF;
+ }
+ return PciSegmentInfo;
+}
|