projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | |
| 9792fb0e | 6 | * SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| 81996ba8 AB |
7 | *\r |
| 8 | **/\r | |
| 9 | \r | |
| 10 | #include <Library/BaseLib.h>\r | |
| 11 | #include <Library/DebugLib.h>\r | |
| 12 | #include <Library/UefiDriverEntryPoint.h>\r | |
| 13 | #include <Library/UefiBootServicesTableLib.h>\r | |
| 14 | #include <Library/XenIoMmioLib.h>\r | |
| 15 | \r | |
| 16 | #include <Protocol/FdtClient.h>\r | |
| 17 | \r | |
| 18 | EFI_STATUS\r | |
| 19 | EFIAPI\r | |
| 20 | InitializeXenioFdtDxe (\r | |
| 21 | IN EFI_HANDLE ImageHandle,\r | |
| 22 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 23 | )\r | |
| 24 | {\r | |
| 25 | EFI_STATUS Status;\r | |
| 26 | FDT_CLIENT_PROTOCOL *FdtClient;\r | |
| 27 | CONST UINT64 *Reg;\r | |
| cfc8d51c AB |
28 | UINT32 RegSize;\r |
| 29 | UINTN AddressCells, SizeCells;\r | |
| 81996ba8 AB |
30 | EFI_HANDLE Handle;\r |
| 31 | UINT64 RegBase;\r | |
| 32 | \r | |
| 33 | Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,\r | |
| 34 | (VOID **)&FdtClient);\r | |
| 35 | ASSERT_EFI_ERROR (Status);\r | |
| 36 | \r | |
| 37 | Status = FdtClient->FindCompatibleNodeReg (FdtClient, "xen,xen",\r | |
| cfc8d51c AB |
38 | (CONST VOID **)&Reg, &AddressCells, &SizeCells,\r |
| 39 | &RegSize);\r | |
| 81996ba8 AB |
40 | if (EFI_ERROR (Status)) {\r |
| 41 | DEBUG ((EFI_D_WARN, "%a: No 'xen,xen' compatible DT node found\n",\r | |
| 42 | __FUNCTION__));\r | |
| 43 | return EFI_UNSUPPORTED;\r | |
| 44 | }\r | |
| 45 | \r | |
| cfc8d51c AB |
46 | ASSERT (AddressCells == 2);\r |
| 47 | ASSERT (SizeCells == 2);\r | |
| 48 | ASSERT (RegSize == 2 * sizeof (UINT64));\r | |
| 81996ba8 AB |
49 | \r |
| 50 | //\r | |
| 51 | // Retrieve the reg base from this node and wire it up to the\r | |
| 52 | // MMIO flavor of the XenBus root device I/O protocol\r | |
| 53 | //\r | |
| 54 | RegBase = SwapBytes64 (Reg[0]);\r | |
| 55 | Handle = NULL;\r | |
| 56 | Status = XenIoMmioInstall (&Handle, RegBase);\r | |
| 57 | if (EFI_ERROR (Status)) {\r | |
| 58 | DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "\r | |
| 59 | "(Status == %r)\n", __FUNCTION__, Status));\r | |
| 60 | return Status;\r | |
| 61 | }\r | |
| 62 | \r | |
| 63 | DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));\r | |
| 64 | \r | |
| 65 | return EFI_SUCCESS;\r | |
| 66 | }\r |