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1 | /** @file\r |
2 | Instance of Base PCI Segment Library that support multi-segment PCI configuration access.\r | |
3 | \r | |
4 | PCI Segment Library that consumes segment information provided by PciSegmentInfoLib to\r | |
5 | support multi-segment PCI configuration access through enhanced configuration access mechanism.\r | |
6 | \r | |
7 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r | |
8 | This program and the accompanying materials are\r | |
9 | licensed and made available under the terms and conditions of\r | |
10 | the BSD License which accompanies this distribution. The full\r | |
11 | text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php.\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #include "PciSegmentLibCommon.h"\r | |
20 | \r | |
21 | /**\r | |
22 | Return the virtual address for the physical address.\r | |
23 | \r | |
24 | @param Address The physical address.\r | |
25 | \r | |
26 | @retval The virtual address.\r | |
27 | **/\r | |
28 | UINTN\r | |
29 | PciSegmentLibVirtualAddress (\r | |
30 | IN UINTN Address\r | |
31 | )\r | |
32 | {\r | |
33 | return Address;\r | |
34 | }\r | |
35 | \r | |
36 | /**\r | |
37 | Register a PCI device so PCI configuration registers may be accessed after\r | |
38 | SetVirtualAddressMap().\r | |
39 | \r | |
40 | If any reserved bits in Address are set, then ASSERT().\r | |
41 | \r | |
42 | @param Address The address that encodes the PCI Bus, Device, Function and\r | |
43 | Register.\r | |
44 | \r | |
45 | @retval RETURN_SUCCESS The PCI device was registered for runtime access.\r | |
46 | @retval RETURN_UNSUPPORTED An attempt was made to call this function\r | |
47 | after ExitBootServices().\r | |
48 | @retval RETURN_UNSUPPORTED The resources required to access the PCI device\r | |
49 | at runtime could not be mapped.\r | |
50 | @retval RETURN_OUT_OF_RESOURCES There are not enough resources available to\r | |
51 | complete the registration.\r | |
52 | \r | |
53 | **/\r | |
54 | RETURN_STATUS\r | |
55 | EFIAPI\r | |
56 | PciSegmentRegisterForRuntimeAccess (\r | |
57 | IN UINTN Address\r | |
58 | )\r | |
59 | {\r | |
60 | //\r | |
61 | // Use PciSegmentLibGetEcamAddress() to validate the Address.\r | |
62 | //\r | |
63 | DEBUG_CODE (\r | |
64 | UINTN Count;\r | |
65 | PCI_SEGMENT_INFO *SegmentInfo;\r | |
66 | \r | |
67 | SegmentInfo = GetPciSegmentInfo (&Count);\r | |
68 | PciSegmentLibGetEcamAddress (Address, SegmentInfo, Count);\r | |
69 | );\r | |
70 | return RETURN_SUCCESS;\r | |
71 | }\r |