mirror of https://github.com/acidanthera/audk.git
218 lines
7.0 KiB
C
218 lines
7.0 KiB
C
/** @file
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PCI command register operations supporting functions declaration for PCI Bus module.
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Copyright (c) 2006 - 2009, 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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**/
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#ifndef _EFI_PCI_COMMAND_H_
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#define _EFI_PCI_COMMAND_H_
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//
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// The PCI Command register bits owned by PCI Bus driver.
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//
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// They should be cleared at the beginning. The other registers
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// are owned by chipset, we should not touch them.
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//
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#define EFI_PCI_COMMAND_BITS_OWNED ( \
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EFI_PCI_COMMAND_IO_SPACE | \
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EFI_PCI_COMMAND_MEMORY_SPACE | \
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EFI_PCI_COMMAND_BUS_MASTER | \
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EFI_PCI_COMMAND_MEMORY_WRITE_AND_INVALIDATE | \
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EFI_PCI_COMMAND_VGA_PALETTE_SNOOP | \
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EFI_PCI_COMMAND_FAST_BACK_TO_BACK \
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)
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//
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// The PCI Bridge Control register bits owned by PCI Bus driver.
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//
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// They should be cleared at the beginning. The other registers
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// are owned by chipset, we should not touch them.
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//
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#define EFI_PCI_BRIDGE_CONTROL_BITS_OWNED ( \
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EFI_PCI_BRIDGE_CONTROL_ISA | \
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EFI_PCI_BRIDGE_CONTROL_VGA | \
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EFI_PCI_BRIDGE_CONTROL_VGA_16 | \
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EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK \
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)
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//
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// The PCCard Bridge Control register bits owned by PCI Bus driver.
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//
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// They should be cleared at the beginning. The other registers
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// are owned by chipset, we should not touch them.
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//
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#define EFI_PCCARD_BRIDGE_CONTROL_BITS_OWNED ( \
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EFI_PCI_BRIDGE_CONTROL_ISA | \
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EFI_PCI_BRIDGE_CONTROL_VGA | \
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EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK \
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)
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#define EFI_GET_REGISTER 1
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#define EFI_SET_REGISTER 2
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#define EFI_ENABLE_REGISTER 3
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#define EFI_DISABLE_REGISTER 4
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/**
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Operate the PCI register via PciIo function interface.
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@param PciIoDevice Pointer to instance of PCI_IO_DEVICE.
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@param Command Operator command.
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@param Offset The address within the PCI configuration space for the PCI controller.
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@param Operation Type of Operation.
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@param PtrCommand Return buffer holding old PCI command, if operation is not EFI_SET_REGISTER.
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@return Status of PciIo operation.
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**/
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EFI_STATUS
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PciOperateRegister (
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IN PCI_IO_DEVICE *PciIoDevice,
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IN UINT16 Command,
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IN UINT8 Offset,
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IN UINT8 Operation,
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OUT UINT16 *PtrCommand
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);
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/**
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Check the cpability supporting by given device.
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@param PciIoDevice Pointer to instance of PCI_IO_DEVICE.
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@retval TRUE Cpability supportted.
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@retval FALSE Cpability not supportted.
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**/
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BOOLEAN
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PciCapabilitySupport (
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IN PCI_IO_DEVICE *PciIoDevice
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);
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/**
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Locate capability register block per capability ID.
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@param PciIoDevice A pointer to the PCI_IO_DEVICE.
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@param CapId The capability ID.
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@param Offset A pointer to the offset returned.
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@param NextRegBlock A pointer to the next block returned.
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@retval EFI_SUCCESS Successfuly located capability register block.
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@retval EFI_UNSUPPORTED Pci device does not support capability.
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@retval EFI_NOT_FOUND Pci device support but can not find register block.
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**/
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EFI_STATUS
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LocateCapabilityRegBlock (
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IN PCI_IO_DEVICE *PciIoDevice,
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IN UINT8 CapId,
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IN OUT UINT8 *Offset,
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OUT UINT8 *NextRegBlock OPTIONAL
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);
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/**
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Macro that reads command register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[out] Pointer to the 16-bit value read from command register.
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@return status of PciIo operation
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**/
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#define PCI_READ_COMMAND_REGISTER(a,b) \
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PciOperateRegister (a, 0, PCI_COMMAND_OFFSET, EFI_GET_REGISTER, b)
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/**
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Macro that writes command register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[in] The 16-bit value written into command register.
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@return status of PciIo operation
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**/
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#define PCI_SET_COMMAND_REGISTER(a,b) \
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PciOperateRegister (a, b, PCI_COMMAND_OFFSET, EFI_SET_REGISTER, NULL)
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/**
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Macro that enables command register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[in] The enabled value written into command register.
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@return status of PciIo operation
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**/
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#define PCI_ENABLE_COMMAND_REGISTER(a,b) \
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PciOperateRegister (a, b, PCI_COMMAND_OFFSET, EFI_ENABLE_REGISTER, NULL)
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/**
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Macro that disalbes command register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[in] The disabled value written into command register.
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@return status of PciIo operation
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**/
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#define PCI_DISABLE_COMMAND_REGISTER(a,b) \
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PciOperateRegister (a, b, PCI_COMMAND_OFFSET, EFI_DISABLE_REGISTER, NULL)
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/**
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Macro that reads PCI bridge control register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[out] The 16-bit value read from control register.
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@return status of PciIo operation
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**/
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#define PCI_READ_BRIDGE_CONTROL_REGISTER(a,b) \
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PciOperateRegister (a, 0, PCI_BRIDGE_CONTROL_REGISTER_OFFSET, EFI_GET_REGISTER, b)
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/**
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Macro that writes PCI bridge control register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[in] The 16-bit value written into control register.
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@return status of PciIo operation
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**/
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#define PCI_SET_BRIDGE_CONTROL_REGISTER(a,b) \
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PciOperateRegister (a, b, PCI_BRIDGE_CONTROL_REGISTER_OFFSET, EFI_SET_REGISTER, NULL)
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/**
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Macro that enables PCI bridge control register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[in] The enabled value written into command register.
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@return status of PciIo operation
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**/
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#define PCI_ENABLE_BRIDGE_CONTROL_REGISTER(a,b) \
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PciOperateRegister (a, b, PCI_BRIDGE_CONTROL_REGISTER_OFFSET, EFI_ENABLE_REGISTER, NULL)
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/**
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Macro that disalbes PCI bridge control register.
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@param a[in] Pointer to instance of PCI_IO_DEVICE.
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@param b[in] The disabled value written into command register.
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@return status of PciIo operation
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**/
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#define PCI_DISABLE_BRIDGE_CONTROL_REGISTER(a,b) \
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PciOperateRegister (a, b, PCI_BRIDGE_CONTROL_REGISTER_OFFSET, EFI_DISABLE_REGISTER, NULL)
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#endif
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