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298 lines
9.8 KiB
C
298 lines
9.8 KiB
C
/** @file
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This protocol abstracts the 8259 interrupt controller. This includes
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PCI IRQ routing needed to program the PCI Interrupt Line register.
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Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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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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@par Revision Reference:
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This protocol is defined in Framework for EFI Compatibility Support Module spec
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Version 0.97.
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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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typedef struct _EFI_LEGACY_8259_PROTOCOL 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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/**
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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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@param This The protocol instance pointer.
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@param MasterBase The base vector for the Master PIC in the 8259 controller.
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@param SlaveBase The base vector for the Slave PIC in the 8259 controller.
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@retval EFI_SUCCESS The new bases were programmed.
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@retval EFI_DEVICE_ERROR A device error occured programming the vector bases.
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**/
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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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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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@param This The protocol instance pointer.
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@param LegacyMask Bit 0 is Irq0 - Bit 15 is Irq15.
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@param LegacyEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15.
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@param ProtectedMask Bit 0 is Irq0 - Bit 15 is Irq15.
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@param ProtectedEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15.
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@retval EFI_SUCCESS 8259 status returned.
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@retval EFI_DEVICE_ERROR Error reading 8259.
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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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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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@param This The protocol instance pointer.
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@param LegacyMask Bit 0 is Irq0 - Bit 15 is Irq15.
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@param LegacyEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15.
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@param ProtectedMask Bit 0 is Irq0 - Bit 15 is Irq15.
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@param ProtectedEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15.
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@retval EFI_SUCCESS 8259 status returned.
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@retval EFI_DEVICE_ERROR Error writing 8259.
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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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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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@param This The protocol instance pointer.
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@param Mode The mode of operation. i.e. the real mode or protected mode.
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@param Mask Optional interupt mask for the new mode.
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@param EdgeLevel Optional trigger mask for the new mode.
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@retval EFI_SUCCESS 8259 programmed.
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@retval EFI_DEVICE_ERROR Error writing to 8259.
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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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Convert from IRQ to processor interrupt vector number.
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@param This The protocol instance pointer.
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@param Irq 8259 IRQ0 - IRQ15.
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@param Vector The processor vector number that matches an Irq.
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@retval EFI_SUCCESS The Vector matching Irq is returned.
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@retval EFI_INVALID_PARAMETER The Irq not valid.
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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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Enable Irq by unmasking interrupt in 8259
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@param This The protocol instance pointer.
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@param Irq 8259 IRQ0 - IRQ15.
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@param LevelTriggered TRUE if level triggered. FALSE if edge triggered.
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@retval EFI_SUCCESS The Irq was enabled on 8259.
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@retval EFI_INVALID_PARAMETER The Irq is not valid.
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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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Disable Irq by masking interrupt in 8259
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@param This The protocol instance pointer.
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@param Irq 8259 IRQ0 - IRQ15.
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@retval EFI_SUCCESS The Irq was disabled on 8259.
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@retval EFI_INVALID_PARAMETER The Irq is not valid.
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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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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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@param This The protocol instance pointer.
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@param PciHandle The PCI function to return the vector for.
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@param Vector The vector for the function it matches.
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@retval EFI_SUCCESS A valid Vector was returned.
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@retval EFI_INVALID_PARAMETER PciHandle not valid.
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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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Send an EOI to 8259
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@param This The protocol instance pointer.
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@param Irq 8259 IRQ0 - IRQ15.
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@retval EFI_SUCCESS EOI was successfully sent to 8259.
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@retval EFI_INVALID_PARAMETER The Irq isnot valid.
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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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@par Protocol Description:
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Abstracts the 8259 and APIC hardware control between EFI usage and
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Compatibility16 usage.
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@param SetVectorBase
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Sets the vector bases for master and slave PICs.
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@param GetMask
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Gets IRQ and edge/level masks for 16-bit real mode and 32-bit protected mode.
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@param SetMask
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Sets the IRQ and edge\level masks for 16-bit real mode and 32-bit protected mode.
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@param SetMode
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Sets PIC mode to 16-bit real mode or 32-bit protected mode.
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@param GetVector
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Gets the base vector assigned to an IRQ.
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@param EnableIrq
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Enables an IRQ.
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@param DisableIrq
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Disables an IRQ.
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@param GetInterruptLine
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Gets an IRQ that is assigned to a PCI device.
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@param EndOfInterrupt
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Issues the end of interrupt command.
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**/
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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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};
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extern EFI_GUID gEfiLegacy8259ProtocolGuid;
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#endif
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