mirror of https://github.com/acidanthera/audk.git
88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
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/** @file
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FDT client library for ARM's TimerDxe
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Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
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This program and the accompanying materials
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are 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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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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#include <Uefi.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Protocol/FdtClient.h>
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#pragma pack (1)
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typedef struct {
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UINT32 Type;
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UINT32 Number;
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UINT32 Flags;
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} INTERRUPT_PROPERTY;
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#pragma pack ()
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RETURN_STATUS
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EFIAPI
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ArmVirtTimerFdtClientLibConstructor (
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VOID
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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 INTERRUPT_PROPERTY *InterruptProp;
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UINT32 PropSize;
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INT32 SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;
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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->FindCompatibleNodeProperty (FdtClient, "arm,armv7-timer",
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"interrupts", (CONST VOID **)&InterruptProp,
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&PropSize);
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if (Status == EFI_NOT_FOUND) {
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Status = FdtClient->FindCompatibleNodeProperty (FdtClient,
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"arm,armv8-timer", "interrupts",
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(CONST VOID **)&InterruptProp,
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&PropSize);
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}
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// - interrupts : Interrupt list for secure, non-secure, virtual and
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// hypervisor timers, in that order.
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//
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ASSERT (PropSize == 36 || PropSize == 48);
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SecIntrNum = SwapBytes32 (InterruptProp[0].Number)
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+ (InterruptProp[0].Type ? 16 : 0);
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IntrNum = SwapBytes32 (InterruptProp[1].Number)
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+ (InterruptProp[1].Type ? 16 : 0);
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VirtIntrNum = SwapBytes32 (InterruptProp[2].Number)
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+ (InterruptProp[2].Type ? 16 : 0);
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HypIntrNum = PropSize < 48 ? 0 : SwapBytes32 (InterruptProp[3].Number)
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+ (InterruptProp[3].Type ? 16 : 0);
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DEBUG ((EFI_D_INFO, "Found Timer interrupts %d, %d, %d, %d\n",
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SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum));
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PcdSet32 (PcdArmArchTimerSecIntrNum, SecIntrNum);
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PcdSet32 (PcdArmArchTimerIntrNum, IntrNum);
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PcdSet32 (PcdArmArchTimerVirtIntrNum, VirtIntrNum);
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PcdSet32 (PcdArmArchTimerHypIntrNum, HypIntrNum);
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return EFI_SUCCESS;
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}
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