755 lines
20 KiB
C
755 lines
20 KiB
C
/** @file
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Local APIC Library.
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This local APIC library instance supports xAPIC mode only.
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Copyright (c) 2010 - 2011, Intel Corporation. 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 <Register/LocalApic.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/LocalApicLib.h>
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#include <Library/IoLib.h>
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#include <Library/TimerLib.h>
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#include <Library/PcdLib.h>
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//
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// Library internal functions
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//
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/**
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Read from a local APIC register.
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This function reads from a local APIC register either in xAPIC or x2APIC mode.
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It is required that in xAPIC mode wider registers (64-bit or 256-bit) must be
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accessed using multiple 32-bit loads or stores, so this function only performs
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32-bit read.
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@param MmioOffset The MMIO offset of the local APIC register in xAPIC mode.
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It must be 16-byte aligned.
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@return 32-bit Value read from the register.
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**/
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UINT32
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EFIAPI
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ReadLocalApicReg (
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IN UINTN MmioOffset
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)
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{
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ASSERT ((MmioOffset & 0xf) == 0);
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ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
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return MmioRead32 (PcdGet32 (PcdCpuLocalApicBaseAddress) + MmioOffset);
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}
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/**
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Write to a local APIC register.
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This function writes to a local APIC register either in xAPIC or x2APIC mode.
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It is required that in xAPIC mode wider registers (64-bit or 256-bit) must be
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accessed using multiple 32-bit loads or stores, so this function only performs
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32-bit write.
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if the register index is invalid or unsupported in current APIC mode, then ASSERT.
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@param MmioOffset The MMIO offset of the local APIC register in xAPIC mode.
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It must be 16-byte aligned.
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@param Value Value to be written to the register.
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**/
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VOID
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EFIAPI
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WriteLocalApicReg (
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IN UINTN MmioOffset,
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IN UINT32 Value
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)
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{
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ASSERT ((MmioOffset & 0xf) == 0);
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ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
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MmioWrite32 (PcdGet32 (PcdCpuLocalApicBaseAddress) + MmioOffset, Value);
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}
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/**
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Send an IPI by writing to ICR.
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This function returns after the IPI has been accepted by the target processor.
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@param IcrLow 32-bit value to be written to the low half of ICR.
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@param ApicId APIC ID of the target processor if this IPI is targeted for a specific processor.
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**/
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VOID
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SendIpi (
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IN UINT32 IcrLow,
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IN UINT32 ApicId
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)
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{
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LOCAL_APIC_ICR_LOW IcrLowReg;
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ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
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ASSERT (ApicId <= 0xff);
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//
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// For xAPIC, the act of writing to the low doubleword of the ICR causes the IPI to be sent.
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//
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WriteLocalApicReg (XAPIC_ICR_HIGH_OFFSET, ApicId << 24);
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WriteLocalApicReg (XAPIC_ICR_LOW_OFFSET, IcrLow);
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do {
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IcrLowReg.Uint32 = ReadLocalApicReg (XAPIC_ICR_LOW_OFFSET);
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} while (IcrLowReg.Bits.DeliveryStatus != 0);
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}
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//
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// Library API implementation functions
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//
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/**
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Get the current local APIC mode.
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If local APIC is disabled, then ASSERT.
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@retval LOCAL_APIC_MODE_XAPIC current APIC mode is xAPIC.
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@retval LOCAL_APIC_MODE_X2APIC current APIC mode is x2APIC.
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**/
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UINTN
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EFIAPI
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GetApicMode (
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VOID
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)
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{
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DEBUG_CODE (
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{
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MSR_IA32_APIC_BASE ApicBaseMsr;
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ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE_ADDRESS);
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//
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// Local APIC should have been enabled
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//
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ASSERT (ApicBaseMsr.Bits.En != 0);
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ASSERT (ApicBaseMsr.Bits.Extd == 0);
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}
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);
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return LOCAL_APIC_MODE_XAPIC;
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}
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/**
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Set the current local APIC mode.
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If the specified local APIC mode is not valid, then ASSERT.
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If the specified local APIC mode can't be set as current, then ASSERT.
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@param ApicMode APIC mode to be set.
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**/
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VOID
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EFIAPI
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SetApicMode (
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IN UINTN ApicMode
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)
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{
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ASSERT (ApicMode == LOCAL_APIC_MODE_XAPIC);
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ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
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}
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/**
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Get the initial local APIC ID of the executing processor assigned by hardware upon power on or reset.
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In xAPIC mode, the initial local APIC ID is 8-bit, and may be different from current APIC ID.
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In x2APIC mode, the local APIC ID can't be changed and there is no concept of initial APIC ID. In this case,
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the 32-bit local APIC ID is returned as initial APIC ID.
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@return 32-bit initial local APIC ID of the executing processor.
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**/
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UINT32
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EFIAPI
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GetInitialApicId (
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VOID
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)
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{
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UINT32 RegEbx;
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ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
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AsmCpuid (CPUID_VERSION_INFO, NULL, &RegEbx, NULL, NULL);
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return RegEbx >> 24;
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}
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/**
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Get the local APIC ID of the executing processor.
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@return 32-bit local APIC ID of the executing processor.
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**/
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UINT32
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EFIAPI
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GetApicId (
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VOID
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)
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{
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UINT32 ApicId;
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ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
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ApicId = ReadLocalApicReg (XAPIC_ID_OFFSET);
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ApicId >>= 24;
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return ApicId;
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}
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/**
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Get the value of the local APIC version register.
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@return the value of the local APIC version register.
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**/
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UINT32
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EFIAPI
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GetApicVersion (
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VOID
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)
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{
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return ReadLocalApicReg (XAPIC_VERSION_OFFSET);
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}
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/**
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Send a Fixed IPI to a specified target processor.
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This function returns after the IPI has been accepted by the target processor.
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@param ApicId The local APIC ID of the target processor.
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@param Vector The vector number of the interrupt being sent.
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**/
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VOID
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EFIAPI
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SendFixedIpi (
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IN UINT32 ApicId,
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IN UINT8 Vector
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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IcrLow.Uint32 = 0;
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_FIXED;
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IcrLow.Bits.Level = 1;
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IcrLow.Bits.Vector = Vector;
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SendIpi (IcrLow.Uint32, ApicId);
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}
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/**
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Send a Fixed IPI to all processors excluding self.
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This function returns after the IPI has been accepted by the target processors.
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@param Vector The vector number of the interrupt being sent.
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**/
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VOID
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EFIAPI
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SendFixedIpiAllExcludingSelf (
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IN UINT8 Vector
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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IcrLow.Uint32 = 0;
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_FIXED;
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IcrLow.Bits.Level = 1;
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IcrLow.Bits.DestinationShorthand = LOCAL_APIC_DESTINATION_SHORTHAND_ALL_EXCLUDING_SELF;
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IcrLow.Bits.Vector = Vector;
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SendIpi (IcrLow.Uint32, 0);
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}
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/**
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Send a SMI IPI to a specified target processor.
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This function returns after the IPI has been accepted by the target processor.
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@param ApicId Specify the local APIC ID of the target processor.
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**/
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VOID
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EFIAPI
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SendSmiIpi (
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IN UINT32 ApicId
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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IcrLow.Uint32 = 0;
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_SMI;
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IcrLow.Bits.Level = 1;
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SendIpi (IcrLow.Uint32, ApicId);
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}
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/**
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Send a SMI IPI to all processors excluding self.
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This function returns after the IPI has been accepted by the target processors.
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**/
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VOID
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EFIAPI
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SendSmiIpiAllExcludingSelf (
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VOID
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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IcrLow.Uint32 = 0;
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_SMI;
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IcrLow.Bits.Level = 1;
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IcrLow.Bits.DestinationShorthand = LOCAL_APIC_DESTINATION_SHORTHAND_ALL_EXCLUDING_SELF;
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SendIpi (IcrLow.Uint32, 0);
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}
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/**
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Send an INIT IPI to a specified target processor.
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This function returns after the IPI has been accepted by the target processor.
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@param ApicId Specify the local APIC ID of the target processor.
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**/
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VOID
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EFIAPI
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SendInitIpi (
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IN UINT32 ApicId
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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IcrLow.Uint32 = 0;
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_INIT;
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IcrLow.Bits.Level = 1;
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SendIpi (IcrLow.Uint32, ApicId);
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}
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/**
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Send an INIT IPI to all processors excluding self.
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This function returns after the IPI has been accepted by the target processors.
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**/
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VOID
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EFIAPI
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SendInitIpiAllExcludingSelf (
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VOID
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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IcrLow.Uint32 = 0;
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_INIT;
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IcrLow.Bits.Level = 1;
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IcrLow.Bits.DestinationShorthand = LOCAL_APIC_DESTINATION_SHORTHAND_ALL_EXCLUDING_SELF;
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SendIpi (IcrLow.Uint32, 0);
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}
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/**
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Send an INIT-Start-up-Start-up IPI sequence to a specified target processor.
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This function returns after the IPI has been accepted by the target processor.
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if StartupRoutine >= 1M, then ASSERT.
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if StartupRoutine is not multiple of 4K, then ASSERT.
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@param ApicId Specify the local APIC ID of the target processor.
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@param StartupRoutine Points to a start-up routine which is below 1M physical
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address and 4K aligned.
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**/
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VOID
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EFIAPI
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SendInitSipiSipi (
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IN UINT32 ApicId,
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IN UINT32 StartupRoutine
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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ASSERT (StartupRoutine < 0x100000);
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ASSERT ((StartupRoutine & 0xfff) == 0);
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SendInitIpi (ApicId);
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MicroSecondDelay (10);
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IcrLow.Uint32 = 0;
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IcrLow.Bits.Vector = (StartupRoutine >> 12);
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_STARTUP;
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IcrLow.Bits.Level = 1;
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SendIpi (IcrLow.Uint32, ApicId);
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MicroSecondDelay (200);
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SendIpi (IcrLow.Uint32, ApicId);
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}
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/**
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Send an INIT-Start-up-Start-up IPI sequence to all processors excluding self.
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This function returns after the IPI has been accepted by the target processors.
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if StartupRoutine >= 1M, then ASSERT.
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if StartupRoutine is not multiple of 4K, then ASSERT.
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@param StartupRoutine Points to a start-up routine which is below 1M physical
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address and 4K aligned.
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**/
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VOID
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EFIAPI
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SendInitSipiSipiAllExcludingSelf (
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IN UINT32 StartupRoutine
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)
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{
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LOCAL_APIC_ICR_LOW IcrLow;
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ASSERT (StartupRoutine < 0x100000);
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ASSERT ((StartupRoutine & 0xfff) == 0);
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SendInitIpiAllExcludingSelf ();
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MicroSecondDelay (10);
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IcrLow.Uint32 = 0;
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IcrLow.Bits.Vector = (StartupRoutine >> 12);
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IcrLow.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_STARTUP;
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IcrLow.Bits.Level = 1;
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IcrLow.Bits.DestinationShorthand = LOCAL_APIC_DESTINATION_SHORTHAND_ALL_EXCLUDING_SELF;
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SendIpi (IcrLow.Uint32, 0);
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MicroSecondDelay (200);
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SendIpi (IcrLow.Uint32, 0);
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}
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/**
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Programming Virtual Wire Mode.
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This function programs the local APIC for virtual wire mode following
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the example described in chapter A.3 of the MP 1.4 spec.
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IOxAPIC is not involved in this type of virtual wire mode.
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**/
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VOID
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EFIAPI
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ProgramVirtualWireMode (
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VOID
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)
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{
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LOCAL_APIC_SVR Svr;
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LOCAL_APIC_LVT_LINT Lint;
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//
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// Enable the APIC via SVR and set the spurious interrupt to use Int 00F.
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//
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Svr.Uint32 = ReadLocalApicReg (XAPIC_SPURIOUS_VECTOR_OFFSET);
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Svr.Bits.SpuriousVector = 0xf;
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Svr.Bits.SoftwareEnable = 1;
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WriteLocalApicReg (XAPIC_SPURIOUS_VECTOR_OFFSET, Svr.Uint32);
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//
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// Program the LINT0 vector entry as ExtInt. Not masked, edge, active high.
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//
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Lint.Uint32 = ReadLocalApicReg (XAPIC_LVT_LINT0_OFFSET);
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Lint.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_EXTINT;
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Lint.Bits.InputPinPolarity = 0;
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Lint.Bits.TriggerMode = 0;
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Lint.Bits.Mask = 0;
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WriteLocalApicReg (XAPIC_LVT_LINT0_OFFSET, Lint.Uint32);
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//
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// Program the LINT0 vector entry as NMI. Not masked, edge, active high.
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//
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Lint.Uint32 = ReadLocalApicReg (XAPIC_LVT_LINT1_OFFSET);
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Lint.Bits.DeliveryMode = LOCAL_APIC_DELIVERY_MODE_NMI;
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Lint.Bits.InputPinPolarity = 0;
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Lint.Bits.TriggerMode = 0;
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Lint.Bits.Mask = 0;
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WriteLocalApicReg (XAPIC_LVT_LINT1_OFFSET, Lint.Uint32);
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}
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/**
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Disable LINT0 & LINT1 interrupts.
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This function sets the mask flag in the LVT LINT0 & LINT1 registers.
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**/
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VOID
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EFIAPI
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DisableLvtInterrupts (
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VOID
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)
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{
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LOCAL_APIC_LVT_LINT LvtLint;
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LvtLint.Uint32 = ReadLocalApicReg (XAPIC_LVT_LINT0_OFFSET);
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LvtLint.Bits.Mask = 1;
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WriteLocalApicReg (XAPIC_LVT_LINT0_OFFSET, LvtLint.Uint32);
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LvtLint.Uint32 = ReadLocalApicReg (XAPIC_LVT_LINT1_OFFSET);
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LvtLint.Bits.Mask = 1;
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WriteLocalApicReg (XAPIC_LVT_LINT1_OFFSET, LvtLint.Uint32);
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}
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/**
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Read the initial count value from the init-count register.
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@return The initial count value read from the init-count register.
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**/
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UINT32
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EFIAPI
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GetApicTimerInitCount (
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VOID
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)
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{
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return ReadLocalApicReg (XAPIC_TIMER_INIT_COUNT_OFFSET);
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}
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/**
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Read the current count value from the current-count register.
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@return The current count value read from the current-count register.
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**/
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UINT32
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EFIAPI
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GetApicTimerCurrentCount (
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VOID
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)
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{
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return ReadLocalApicReg (XAPIC_TIMER_CURRENT_COUNT_OFFSET);
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}
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/**
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Initialize the local APIC timer.
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The local APIC timer is initialized and enabled.
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@param DivideValue The divide value for the DCR. It is one of 1,2,4,8,16,32,64,128.
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If it is 0, then use the current divide value in the DCR.
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@param InitCount The initial count value.
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@param PeriodicMode If TRUE, timer mode is peridoic. Othewise, timer mode is one-shot.
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@param Vector The timer interrupt vector number.
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**/
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VOID
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EFIAPI
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InitializeApicTimer (
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IN UINTN DivideValue,
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IN UINT32 InitCount,
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IN BOOLEAN PeriodicMode,
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IN UINT8 Vector
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)
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{
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LOCAL_APIC_SVR Svr;
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LOCAL_APIC_DCR Dcr;
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LOCAL_APIC_LVT_TIMER LvtTimer;
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UINT32 Divisor;
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//
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// Ensure local APIC is in software-enabled state.
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//
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Svr.Uint32 = ReadLocalApicReg (XAPIC_SPURIOUS_VECTOR_OFFSET);
|
|
Svr.Bits.SoftwareEnable = 1;
|
|
WriteLocalApicReg (XAPIC_SPURIOUS_VECTOR_OFFSET, Svr.Uint32);
|
|
|
|
//
|
|
// Program init-count register.
|
|
//
|
|
WriteLocalApicReg (XAPIC_TIMER_INIT_COUNT_OFFSET, InitCount);
|
|
|
|
if (DivideValue != 0) {
|
|
ASSERT (DivideValue <= 128);
|
|
ASSERT (DivideValue == GetPowerOfTwo32((UINT32)DivideValue));
|
|
Divisor = (UINT32)((HighBitSet32 ((UINT32)DivideValue) - 1) & 0x7);
|
|
|
|
Dcr.Uint32 = ReadLocalApicReg (XAPIC_TIMER_DIVIDE_CONFIGURATION_OFFSET);
|
|
Dcr.Bits.DivideValue1 = (Divisor & 0x3);
|
|
Dcr.Bits.DivideValue2 = (Divisor >> 2);
|
|
WriteLocalApicReg (XAPIC_TIMER_DIVIDE_CONFIGURATION_OFFSET, Dcr.Uint32);
|
|
}
|
|
|
|
//
|
|
// Enable APIC timer interrupt with specified timer mode.
|
|
//
|
|
LvtTimer.Uint32 = ReadLocalApicReg (XAPIC_LVT_TIMER_OFFSET);
|
|
if (PeriodicMode) {
|
|
LvtTimer.Bits.TimerMode = 1;
|
|
} else {
|
|
LvtTimer.Bits.TimerMode = 0;
|
|
}
|
|
LvtTimer.Bits.Mask = 0;
|
|
LvtTimer.Bits.Vector = Vector;
|
|
WriteLocalApicReg (XAPIC_LVT_TIMER_OFFSET, LvtTimer.Uint32);
|
|
}
|
|
|
|
/**
|
|
Get the state of the local APIC timer.
|
|
|
|
@param DivideValue Return the divide value for the DCR. It is one of 1,2,4,8,16,32,64,128.
|
|
@param PeriodicMode Return the timer mode. If TRUE, timer mode is peridoic. Othewise, timer mode is one-shot.
|
|
@param Vector Return the timer interrupt vector number.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
GetApicTimerState (
|
|
OUT UINTN *DivideValue OPTIONAL,
|
|
OUT BOOLEAN *PeriodicMode OPTIONAL,
|
|
OUT UINT8 *Vector OPTIONAL
|
|
)
|
|
{
|
|
UINT32 Divisor;
|
|
LOCAL_APIC_DCR Dcr;
|
|
LOCAL_APIC_LVT_TIMER LvtTimer;
|
|
|
|
if (DivideValue != NULL) {
|
|
Dcr.Uint32 = ReadLocalApicReg (XAPIC_TIMER_DIVIDE_CONFIGURATION_OFFSET);
|
|
Divisor = Dcr.Bits.DivideValue1 | (Dcr.Bits.DivideValue2 << 2);
|
|
Divisor = (Divisor + 1) & 0x7;
|
|
*DivideValue = ((UINTN)1) << Divisor;
|
|
}
|
|
|
|
if (PeriodicMode != NULL || Vector != NULL) {
|
|
LvtTimer.Uint32 = ReadLocalApicReg (XAPIC_LVT_TIMER_OFFSET);
|
|
if (PeriodicMode != NULL) {
|
|
if (LvtTimer.Bits.TimerMode == 1) {
|
|
*PeriodicMode = TRUE;
|
|
} else {
|
|
*PeriodicMode = FALSE;
|
|
}
|
|
}
|
|
if (Vector != NULL) {
|
|
*Vector = (UINT8) LvtTimer.Bits.Vector;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
Enable the local APIC timer interrupt.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
EnableApicTimerInterrupt (
|
|
VOID
|
|
)
|
|
{
|
|
LOCAL_APIC_LVT_TIMER LvtTimer;
|
|
|
|
LvtTimer.Uint32 = ReadLocalApicReg (XAPIC_LVT_TIMER_OFFSET);
|
|
LvtTimer.Bits.Mask = 0;
|
|
WriteLocalApicReg (XAPIC_LVT_TIMER_OFFSET, LvtTimer.Uint32);
|
|
}
|
|
|
|
/**
|
|
Disable the local APIC timer interrupt.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
DisableApicTimerInterrupt (
|
|
VOID
|
|
)
|
|
{
|
|
LOCAL_APIC_LVT_TIMER LvtTimer;
|
|
|
|
LvtTimer.Uint32 = ReadLocalApicReg (XAPIC_LVT_TIMER_OFFSET);
|
|
LvtTimer.Bits.Mask = 1;
|
|
WriteLocalApicReg (XAPIC_LVT_TIMER_OFFSET, LvtTimer.Uint32);
|
|
}
|
|
|
|
/**
|
|
Get the local APIC timer interrupt state.
|
|
|
|
@retval TRUE The local APIC timer interrupt is enabled.
|
|
@retval FALSE The local APIC timer interrupt is disabled.
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
GetApicTimerInterruptState (
|
|
VOID
|
|
)
|
|
{
|
|
LOCAL_APIC_LVT_TIMER LvtTimer;
|
|
|
|
LvtTimer.Uint32 = ReadLocalApicReg (XAPIC_LVT_TIMER_OFFSET);
|
|
return (BOOLEAN)(LvtTimer.Bits.Mask == 0);
|
|
}
|
|
|
|
/**
|
|
Send EOI to the local APIC.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
SendApicEoi (
|
|
VOID
|
|
)
|
|
{
|
|
WriteLocalApicReg (XAPIC_EOI_OFFSET, 0);
|
|
}
|
|
|
|
/**
|
|
Get the 32-bit address that a device should use to send a Message Signaled
|
|
Interrupt (MSI) to the Local APIC of the currently executing processor.
|
|
|
|
@return 32-bit address used to send an MSI to the Local APIC.
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
GetApicMsiAddress (
|
|
VOID
|
|
)
|
|
{
|
|
LOCAL_APIC_MSI_ADDRESS MsiAddress;
|
|
|
|
//
|
|
// Return address for an MSI interrupt to be delivered only to the APIC ID
|
|
// of the currently executing processor.
|
|
//
|
|
MsiAddress.Uint32 = 0;
|
|
MsiAddress.Bits.BaseAddress = 0xFEE;
|
|
MsiAddress.Bits.DestinationId = GetApicId ();
|
|
return MsiAddress.Uint32;
|
|
}
|
|
|
|
/**
|
|
Get the 64-bit data value that a device should use to send a Message Signaled
|
|
Interrupt (MSI) to the Local APIC of the currently executing processor.
|
|
|
|
If Vector is not in range 0x10..0xFE, then ASSERT().
|
|
If DeliveryMode is not supported, then ASSERT().
|
|
|
|
@param Vector The 8-bit interrupt vector associated with the MSI.
|
|
Must be in the range 0x10..0xFE
|
|
@param DeliveryMode A 3-bit value that specifies how the recept of the MSI
|
|
is handled. The only supported values are:
|
|
0: LOCAL_APIC_DELIVERY_MODE_FIXED
|
|
1: LOCAL_APIC_DELIVERY_MODE_LOWEST_PRIORITY
|
|
2: LOCAL_APIC_DELIVERY_MODE_SMI
|
|
4: LOCAL_APIC_DELIVERY_MODE_NMI
|
|
5: LOCAL_APIC_DELIVERY_MODE_INIT
|
|
7: LOCAL_APIC_DELIVERY_MODE_EXTINT
|
|
|
|
@param LevelTriggered TRUE specifies a level triggered interrupt.
|
|
FALSE specifies an edge triggered interrupt.
|
|
@param AssertionLevel Ignored if LevelTriggered is FALSE.
|
|
TRUE specifies a level triggered interrupt that active
|
|
when the interrupt line is asserted.
|
|
FALSE specifies a level triggered interrupt that active
|
|
when the interrupt line is deasserted.
|
|
|
|
@return 64-bit data value used to send an MSI to the Local APIC.
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
GetApicMsiValue (
|
|
IN UINT8 Vector,
|
|
IN UINTN DeliveryMode,
|
|
IN BOOLEAN LevelTriggered,
|
|
IN BOOLEAN AssertionLevel
|
|
)
|
|
{
|
|
LOCAL_APIC_MSI_DATA MsiData;
|
|
|
|
ASSERT (Vector >= 0x10 && Vector <= 0xFE);
|
|
ASSERT (DeliveryMode < 8 && DeliveryMode != 6 && DeliveryMode != 3);
|
|
|
|
MsiData.Uint64 = 0;
|
|
MsiData.Bits.Vector = Vector;
|
|
MsiData.Bits.DeliveryMode = (UINT32)DeliveryMode;
|
|
if (LevelTriggered) {
|
|
MsiData.Bits.TriggerMode = 1;
|
|
if (AssertionLevel) {
|
|
MsiData.Bits.Level = 1;
|
|
}
|
|
}
|
|
return MsiData.Uint64;
|
|
}
|