mirror of https://github.com/acidanthera/audk.git
318 lines
8.9 KiB
C
318 lines
8.9 KiB
C
/*++
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Copyright (c) 1999 - 2006, Intel Corporation
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All rights reserved. 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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Module Name:
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Legacy8259.h
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Abstract:
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This protocol abstracts the 8259 interrupt controller. This includes
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PCI IRQ routing need to program the PCI Interrupt Line register.
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Revision History
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The EFI Legacy 8259 Protocol is compliant with CSM spec 0.96.
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--*/
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#ifndef _EFI_LEGACY_8259_H
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#define _EFI_LEGACY_8259_H
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#define EFI_LEGACY_8259_PROTOCOL_GUID \
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{ \
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0x38321dba, 0x4fe0, 0x4e17, 0x8a, 0xec, 0x41, 0x30, 0x55, 0xea, 0xed, 0xc1 \
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}
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EFI_FORWARD_DECLARATION (EFI_LEGACY_8259_PROTOCOL);
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typedef enum {
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Efi8259Irq0,
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Efi8259Irq1,
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Efi8259Irq2,
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Efi8259Irq3,
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Efi8259Irq4,
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Efi8259Irq5,
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Efi8259Irq6,
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Efi8259Irq7,
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Efi8259Irq8,
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Efi8259Irq9,
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Efi8259Irq10,
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Efi8259Irq11,
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Efi8259Irq12,
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Efi8259Irq13,
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Efi8259Irq14,
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Efi8259Irq15,
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Efi8259IrqMax
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} EFI_8259_IRQ;
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typedef enum {
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Efi8259LegacyMode,
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Efi8259ProtectedMode,
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Efi8259MaxMode
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} EFI_8259_MODE;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_SET_VECTOR_BASE) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN UINT8 MasterBase,
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IN UINT8 SlaveBase
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)
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/*++
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Routine Description:
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Get the 8259 interrupt masks for Irq0 - Irq15. A different mask exists for
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the legacy mode mask and the protected mode mask. The base address for the 8259
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is different for legacy and protected mode, so two masks are required.
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Arguments:
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This - Protocol instance pointer.
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MasterBase - The base vector for the Master PIC in the 8259 controller
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Slavebase - The base vector for the Master PIC in the 8259 controller
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Returns:
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EFI_SUCCESS - The new bases were programmed
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EFI_DEVICE_ERROR - A device erro occured programming the vector bases
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_GET_MASK) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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OUT UINT16 *LegacyMask, OPTIONAL
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OUT UINT16 *LegacyEdgeLevel, OPTIONAL
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OUT UINT16 *ProtectedMask, OPTIONAL
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OUT UINT16 *ProtectedEdgeLevel OPTIONAL
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)
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/*++
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Routine Description:
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Get the 8259 interrupt masks for Irq0 - Irq15. A different mask exists for
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the legacy mode mask and the protected mode mask. The base address for the 8259
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is different for legacy and protected mode, so two masks are required.
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Arguments:
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This - Protocol instance pointer.
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LegacyMask - Bit 0 is Irq0 - Bit 15 is Irq15
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LegacyEdgeLevel - Bit 0 is Irq0 - Bit 15 is Irq15
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ProtectedMask - Bit 0 is Irq0 - Bit 15 is Irq15
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ProtectedEdgeLevel - Bit 0 is Irq0 - Bit 15 is Irq15
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Returns:
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EFI_SUCCESS - 8259 status returned
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EFI_DEVICE_ERROR - Error reading 8259
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_SET_MASK) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN UINT16 *LegacyMask, OPTIONAL
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IN UINT16 *LegacyEdgeLevel, OPTIONAL
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IN UINT16 *ProtectedMask, OPTIONAL
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IN UINT16 *ProtectedEdgeLevel OPTIONAL
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)
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/*++
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Routine Description:
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Set the 8259 interrupt masks for Irq0 - Irq15. A different mask exists for
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the legacy mode mask and the protected mode mask. The base address for the 8259
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is different for legacy and protected mode, so two masks are required.
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Also set the edge/level masks.
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Arguments:
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This - Protocol instance pointer.
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LegacyMask - Bit 0 is Irq0 - Bit 15 is Irq15
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LegacyEdgeLevel - Bit 0 is Irq0 - Bit 15 is Irq15
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ProtectedMask - Bit 0 is Irq0 - Bit 15 is Irq15
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ProtectedEdgeLevel - Bit 0 is Irq0 - Bit 15 is Irq15
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Returns:
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EFI_SUCCESS - 8259 status returned
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EFI_DEVICE_ERROR - Error reading 8259
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_SET_MODE) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN EFI_8259_MODE Mode,
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IN UINT16 *Mask, OPTIONAL
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IN UINT16 *EdgeLevel OPTIONAL
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)
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/*++
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Routine Description:
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Set the 8259 mode of operation. The base address for the 8259 is different for
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legacy and protected mode. The legacy mode requires the master 8259 to have a
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master base of 0x08 and the slave base of 0x70. The protected mode base locations
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are not defined. Interrupts must be masked by the caller before this function
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is called. The interrupt mask from the current mode is saved. The interrupt
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mask for the new mode is Mask, or if Mask does not exist the previously saved
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mask is used.
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Arguments:
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This - Protocol instance pointer.
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Mode - Mode of operation. i.e. real mode or protected mode
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Mask - Optional interupt mask for the new mode.
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EdgeLevel - Optional trigger mask for the new mode.
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Returns:
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EFI_SUCCESS - 8259 programmed
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EFI_DEVICE_ERROR - Error writting to 8259
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_GET_VECTOR) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN EFI_8259_IRQ Irq,
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OUT UINT8 *Vector
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)
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/*++
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Routine Description:
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Convert from IRQ to processor interrupt vector number.
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Arguments:
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This - Protocol instance pointer.
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Irq - 8259 IRQ0 - IRQ15
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Vector - Processor vector number that matches Irq
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Returns:
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EFI_SUCCESS - The Vector matching Irq is returned
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EFI_INVALID_PARAMETER - Irq not valid
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_ENABLE_IRQ) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN EFI_8259_IRQ Irq,
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IN BOOLEAN LevelTriggered
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)
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/*++
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Routine Description:
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Enable Irq by unmasking interrupt in 8259
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Arguments:
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This - Protocol instance pointer.
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Irq - 8259 IRQ0 - IRQ15
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LevelTriggered - TRUE if level triggered. FALSE if edge triggered.
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Returns:
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EFI_SUCCESS - Irq enabled on 8259
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EFI_INVALID_PARAMETER - Irq not valid
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_DISABLE_IRQ) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN EFI_8259_IRQ Irq
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)
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/*++
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Routine Description:
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Disable Irq by masking interrupt in 8259
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Arguments:
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This - Protocol instance pointer.
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Irq - 8259 IRQ0 - IRQ15
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Returns:
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EFI_SUCCESS - Irq disabled on 8259
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EFI_INVALID_PARAMETER - Irq not valid
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_GET_INTERRUPT_LINE) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN EFI_HANDLE PciHandle,
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OUT UINT8 *Vector
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)
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/*++
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Routine Description:
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PciHandle represents a PCI config space of a PCI function. Vector
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represents Interrupt Pin (from PCI config space) and it is the data
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that is programmed into the Interrupt Line (from the PCI config space)
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register.
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Arguments:
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This - Protocol instance pointer.
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PciHandle - PCI function to return vector for
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Vector - Vector for fucntion that matches
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Returns:
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EFI_SUCCESS - A valid Vector is returned
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EFI_INVALID_PARAMETER - PciHandle not valid
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--*/
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;
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_8259_END_OF_INTERRUPT) (
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IN EFI_LEGACY_8259_PROTOCOL * This,
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IN EFI_8259_IRQ Irq
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)
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/*++
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Routine Description:
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Send an EOI to 8259
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Arguments:
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This - Protocol instance pointer.
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Irq - 8259 IRQ0 - IRQ15
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Returns:
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EFI_SUCCESS - EOI successfully sent to 8259
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EFI_INVALID_PARAMETER - Irq not valid
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--*/
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;
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typedef struct _EFI_LEGACY_8259_PROTOCOL {
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EFI_LEGACY_8259_SET_VECTOR_BASE SetVectorBase;
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EFI_LEGACY_8259_GET_MASK GetMask;
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EFI_LEGACY_8259_SET_MASK SetMask;
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EFI_LEGACY_8259_SET_MODE SetMode;
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EFI_LEGACY_8259_GET_VECTOR GetVector;
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EFI_LEGACY_8259_ENABLE_IRQ EnableIrq;
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EFI_LEGACY_8259_DISABLE_IRQ DisableIrq;
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EFI_LEGACY_8259_GET_INTERRUPT_LINE GetInterruptLine;
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EFI_LEGACY_8259_END_OF_INTERRUPT EndOfInterrupt;
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} EFI_LEGACY_8259_PROTOCOL;
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extern EFI_GUID gEfiLegacy8259ProtocolGuid;
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#endif
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