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/** @file
FDT client library for ARM's TimerDxe
Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/FdtClient.h>
#pragma pack (1)
typedef struct {
UINT32 Type;
UINT32 Number;
UINT32 Flags;
} INTERRUPT_PROPERTY;
#pragma pack ()
RETURN_STATUS
EFIAPI
ArmVirtTimerFdtClientLibConstructor (
VOID
)
{
EFI_STATUS Status;
FDT_CLIENT_PROTOCOL *FdtClient;
CONST INTERRUPT_PROPERTY *InterruptProp;
UINT32 PropSize;
INT32 SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;
RETURN_STATUS PcdStatus;
Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,
(VOID **)&FdtClient);
ASSERT_EFI_ERROR (Status);
Status = FdtClient->FindCompatibleNodeProperty (FdtClient, "arm,armv7-timer",
"interrupts", (CONST VOID **)&InterruptProp,
&PropSize);
if (Status == EFI_NOT_FOUND) {
Status = FdtClient->FindCompatibleNodeProperty (FdtClient,
"arm,armv8-timer", "interrupts",
(CONST VOID **)&InterruptProp,
&PropSize);
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// - interrupts : Interrupt list for secure, non-secure, virtual and
// hypervisor timers, in that order.
//
ASSERT (PropSize == 36 || PropSize == 48);
SecIntrNum = SwapBytes32 (InterruptProp[0].Number)
+ (InterruptProp[0].Type ? 16 : 0);
IntrNum = SwapBytes32 (InterruptProp[1].Number)
+ (InterruptProp[1].Type ? 16 : 0);
VirtIntrNum = SwapBytes32 (InterruptProp[2].Number)
+ (InterruptProp[2].Type ? 16 : 0);
HypIntrNum = PropSize < 48 ? 0 : SwapBytes32 (InterruptProp[3].Number)
+ (InterruptProp[3].Type ? 16 : 0);
DEBUG ((DEBUG_INFO, "Found Timer interrupts %d, %d, %d, %d\n",
SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum));
PcdStatus = PcdSet32S (PcdArmArchTimerSecIntrNum, SecIntrNum);
ASSERT_RETURN_ERROR (PcdStatus);
PcdStatus = PcdSet32S (PcdArmArchTimerIntrNum, IntrNum);
ASSERT_RETURN_ERROR (PcdStatus);
PcdStatus = PcdSet32S (PcdArmArchTimerVirtIntrNum, VirtIntrNum);
ASSERT_RETURN_ERROR (PcdStatus);
PcdStatus = PcdSet32S (PcdArmArchTimerHypIntrNum, HypIntrNum);
ASSERT_RETURN_ERROR (PcdStatus);
return EFI_SUCCESS;
}
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