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81996ba8 AB |
1 | /** @file\r |
2 | * Xenio FDT client protocol driver for xen,xen DT node\r | |
3 | *\r | |
4 | * Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>\r | |
5 | *\r | |
6 | * This program and the accompanying materials are\r | |
7 | * 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 <Library/BaseLib.h>\r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/UefiDriverEntryPoint.h>\r | |
19 | #include <Library/UefiBootServicesTableLib.h>\r | |
20 | #include <Library/XenIoMmioLib.h>\r | |
21 | \r | |
22 | #include <Protocol/FdtClient.h>\r | |
23 | \r | |
24 | EFI_STATUS\r | |
25 | EFIAPI\r | |
26 | InitializeXenioFdtDxe (\r | |
27 | IN EFI_HANDLE ImageHandle,\r | |
28 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
29 | )\r | |
30 | {\r | |
31 | EFI_STATUS Status;\r | |
32 | FDT_CLIENT_PROTOCOL *FdtClient;\r | |
33 | CONST UINT64 *Reg;\r | |
cfc8d51c AB |
34 | UINT32 RegSize;\r |
35 | UINTN AddressCells, SizeCells;\r | |
81996ba8 AB |
36 | EFI_HANDLE Handle;\r |
37 | UINT64 RegBase;\r | |
38 | \r | |
39 | Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,\r | |
40 | (VOID **)&FdtClient);\r | |
41 | ASSERT_EFI_ERROR (Status);\r | |
42 | \r | |
43 | Status = FdtClient->FindCompatibleNodeReg (FdtClient, "xen,xen",\r | |
cfc8d51c AB |
44 | (CONST VOID **)&Reg, &AddressCells, &SizeCells,\r |
45 | &RegSize);\r | |
81996ba8 AB |
46 | if (EFI_ERROR (Status)) {\r |
47 | DEBUG ((EFI_D_WARN, "%a: No 'xen,xen' compatible DT node found\n",\r | |
48 | __FUNCTION__));\r | |
49 | return EFI_UNSUPPORTED;\r | |
50 | }\r | |
51 | \r | |
cfc8d51c AB |
52 | ASSERT (AddressCells == 2);\r |
53 | ASSERT (SizeCells == 2);\r | |
54 | ASSERT (RegSize == 2 * sizeof (UINT64));\r | |
81996ba8 AB |
55 | \r |
56 | //\r | |
57 | // Retrieve the reg base from this node and wire it up to the\r | |
58 | // MMIO flavor of the XenBus root device I/O protocol\r | |
59 | //\r | |
60 | RegBase = SwapBytes64 (Reg[0]);\r | |
61 | Handle = NULL;\r | |
62 | Status = XenIoMmioInstall (&Handle, RegBase);\r | |
63 | if (EFI_ERROR (Status)) {\r | |
64 | DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "\r | |
65 | "(Status == %r)\n", __FUNCTION__, Status));\r | |
66 | return Status;\r | |
67 | }\r | |
68 | \r | |
69 | DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));\r | |
70 | \r | |
71 | return EFI_SUCCESS;\r | |
72 | }\r |