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/** @file
*
* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include <Uefi.h>
#include <Library/IoLib.h>
#include <Library/ArmGicLib.h>
#include <Library/PcdLib.h>
UINTN
EFIAPI
ArmGicGetMaxNumInterrupts (
IN INTN GicDistributorBase
)
{
return 32 * ((MmioRead32 (GicDistributorBase + ARM_GIC_ICDICTR) & 0x1F) + 1);
}
VOID
EFIAPI
ArmGicSendSgiTo (
IN INTN GicDistributorBase,
IN INTN TargetListFilter,
IN INTN CPUTargetList,
IN INTN SgiId
)
{
MmioWrite32 (GicDistributorBase + ARM_GIC_ICDSGIR, ((TargetListFilter & 0x3) << 24) | ((CPUTargetList & 0xFF) << 16) | SgiId);
}
RETURN_STATUS
EFIAPI
ArmGicAcknowledgeInterrupt (
IN UINTN GicDistributorBase,
IN UINTN GicInterruptInterfaceBase,
OUT UINTN *CoreId,
OUT UINTN *InterruptId
)
{
UINT32 Interrupt;
// Read the Interrupt Acknowledge Register
Interrupt = MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIAR);
// Check if it is a valid interrupt ID
if ((Interrupt & 0x3FF) < ArmGicGetMaxNumInterrupts (GicDistributorBase)) {
// Got a valid SGI number hence signal End of Interrupt by writing to ICCEOIR
MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCEIOR, Interrupt);
if (CoreId) {
*CoreId = (Interrupt >> 10) & 0x7;
}
if (InterruptId) {
*InterruptId = Interrupt & 0x3FF;
}
return RETURN_SUCCESS;
} else {
return RETURN_INVALID_PARAMETER;
}
}
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