81996ba8b4
Now that the only functionality that remains in VirtFdtDxe is enumerating the respective virtual I/O buses, it no longer makes sense to have a driver that is shared between Xen domU and QEMU. So move the Xen I/O DT node handling to a new driver, and update ArmVirtXen to switch to it. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/** @file
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* Xenio FDT client protocol driver for xen,xen DT node
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*
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* Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
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*
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* This program and the accompanying materials are
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* licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/XenIoMmioLib.h>
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#include <Protocol/FdtClient.h>
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EFI_STATUS
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EFIAPI
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InitializeXenioFdtDxe (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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FDT_CLIENT_PROTOCOL *FdtClient;
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CONST UINT64 *Reg;
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UINT32 RegElemSize, RegSize;
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EFI_HANDLE Handle;
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UINT64 RegBase;
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Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,
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(VOID **)&FdtClient);
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ASSERT_EFI_ERROR (Status);
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Status = FdtClient->FindCompatibleNodeReg (FdtClient, "xen,xen",
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(CONST VOID **)&Reg, &RegElemSize, &RegSize);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_WARN, "%a: No 'xen,xen' compatible DT node found\n",
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__FUNCTION__));
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return EFI_UNSUPPORTED;
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}
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ASSERT (RegSize == 16);
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//
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// Retrieve the reg base from this node and wire it up to the
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// MMIO flavor of the XenBus root device I/O protocol
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//
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RegBase = SwapBytes64 (Reg[0]);
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Handle = NULL;
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Status = XenIoMmioInstall (&Handle, RegBase);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "%a: XenIoMmioInstall () failed on a new handle "
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"(Status == %r)\n", __FUNCTION__, Status));
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return Status;
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}
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DEBUG ((EFI_D_INFO, "Found Xen node with Grant table @ 0x%Lx\n", RegBase));
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return EFI_SUCCESS;
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}
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