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433b31dd AB |
1 | /** @file\r |
2 | *\r | |
bb5420bb | 3 | * Copyright (c) 2011-2014, ARM Limited. All rights reserved.\r |
433b31dd AB |
4 | * Copyright (c) 2014, Linaro Limited. All rights reserved.\r |
5 | *\r | |
6 | * This program and the accompanying materials\r | |
7 | * are licensed and made available under the terms and conditions of the BSD License\r | |
8 | * which accompanies this distribution. The full text of the license may be found at\r | |
9 | * http://opensource.org/licenses/bsd-license.php\r | |
10 | *\r | |
11 | * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | *\r | |
14 | **/\r | |
15 | \r | |
16 | #include <PiPei.h>\r | |
17 | \r | |
18 | #include <Library/MemoryAllocationLib.h>\r | |
19 | #include <Library/DebugLib.h>\r | |
20 | #include <Library/HobLib.h>\r | |
21 | #include <Library/PcdLib.h>\r | |
22 | #include <libfdt.h>\r | |
23 | \r | |
337d450e | 24 | #include <Guid/EarlyPL011BaseAddress.h>\r |
cc667df0 | 25 | #include <Guid/FdtHob.h>\r |
337d450e | 26 | \r |
433b31dd AB |
27 | EFI_STATUS\r |
28 | EFIAPI\r | |
29 | PlatformPeim (\r | |
30 | VOID\r | |
31 | )\r | |
32 | {\r | |
33 | VOID *Base;\r | |
34 | VOID *NewBase;\r | |
35 | UINTN FdtSize;\r | |
616ea9da | 36 | UINTN FdtPages;\r |
cc667df0 | 37 | UINT64 *FdtHobData;\r |
337d450e AB |
38 | UINT64 *UartHobData;\r |
39 | INT32 Node, Prev;\r | |
40 | CONST CHAR8 *Compatible;\r | |
41 | CONST CHAR8 *CompItem;\r | |
83ae7589 | 42 | CONST CHAR8 *NodeStatus;\r |
337d450e | 43 | INT32 Len;\r |
83ae7589 | 44 | INT32 StatusLen;\r |
337d450e AB |
45 | CONST UINT64 *RegProp;\r |
46 | UINT64 UartBase;\r | |
47 | \r | |
433b31dd | 48 | \r |
cc667df0 AB |
49 | Base = (VOID*)(UINTN)PcdGet64 (PcdDeviceTreeInitialBaseAddress);\r |
50 | ASSERT (Base != NULL);\r | |
433b31dd AB |
51 | ASSERT (fdt_check_header (Base) == 0);\r |
52 | \r | |
616ea9da AB |
53 | FdtSize = fdt_totalsize (Base) + PcdGet32 (PcdDeviceTreeAllocationPadding);\r |
54 | FdtPages = EFI_SIZE_TO_PAGES (FdtSize);\r | |
55 | NewBase = AllocatePages (FdtPages);\r | |
433b31dd | 56 | ASSERT (NewBase != NULL);\r |
616ea9da | 57 | fdt_open_into (Base, NewBase, EFI_PAGES_TO_SIZE (FdtPages));\r |
cc667df0 AB |
58 | \r |
59 | FdtHobData = BuildGuidHob (&gFdtHobGuid, sizeof *FdtHobData);\r | |
60 | ASSERT (FdtHobData != NULL);\r | |
61 | *FdtHobData = (UINTN)NewBase;\r | |
433b31dd | 62 | \r |
337d450e AB |
63 | UartHobData = BuildGuidHob (&gEarlyPL011BaseAddressGuid, sizeof *UartHobData);\r |
64 | ASSERT (UartHobData != NULL);\r | |
65 | *UartHobData = 0;\r | |
66 | \r | |
67 | //\r | |
68 | // Look for a UART node\r | |
69 | //\r | |
70 | for (Prev = 0;; Prev = Node) {\r | |
71 | Node = fdt_next_node (Base, Prev, NULL);\r | |
72 | if (Node < 0) {\r | |
73 | break;\r | |
74 | }\r | |
75 | \r | |
76 | //\r | |
77 | // Check for UART node\r | |
78 | //\r | |
79 | Compatible = fdt_getprop (Base, Node, "compatible", &Len);\r | |
80 | \r | |
81 | //\r | |
82 | // Iterate over the NULL-separated items in the compatible string\r | |
83 | //\r | |
84 | for (CompItem = Compatible; CompItem != NULL && CompItem < Compatible + Len;\r | |
85 | CompItem += 1 + AsciiStrLen (CompItem)) {\r | |
86 | \r | |
87 | if (AsciiStrCmp (CompItem, "arm,pl011") == 0) {\r | |
83ae7589 AB |
88 | NodeStatus = fdt_getprop (Base, Node, "status", &StatusLen);\r |
89 | if (NodeStatus != NULL && AsciiStrCmp (NodeStatus, "okay") != 0) {\r | |
90 | continue;\r | |
91 | }\r | |
92 | \r | |
337d450e AB |
93 | RegProp = fdt_getprop (Base, Node, "reg", &Len);\r |
94 | ASSERT (Len == 16);\r | |
95 | \r | |
96 | UartBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));\r | |
97 | \r | |
98 | DEBUG ((EFI_D_INFO, "%a: PL011 UART @ 0x%lx\n", __FUNCTION__, UartBase));\r | |
99 | \r | |
100 | *UartHobData = UartBase;\r | |
101 | break;\r | |
102 | }\r | |
103 | }\r | |
104 | }\r | |
105 | \r | |
bb5420bb | 106 | BuildFvHob (PcdGet64 (PcdFvBaseAddress), PcdGet32 (PcdFvSize));\r |
433b31dd AB |
107 | \r |
108 | return EFI_SUCCESS;\r | |
109 | }\r |