mirror of https://github.com/acidanthera/audk.git
117 lines
4.4 KiB
C
117 lines
4.4 KiB
C
/** @file
|
|
ISA HC Protocol as defined in the PI 1.2.1 specification.
|
|
|
|
This protocol provides registration for ISA devices on a positive- or
|
|
subtractive-decode ISA bus. It allows devices to be registered and also
|
|
handles opening and closing the apertures which are positively-decoded.
|
|
|
|
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
@par Revision Reference:
|
|
This protocol is from PI Version 1.2.1.
|
|
|
|
**/
|
|
|
|
#ifndef __ISA_HC_PROTOCOL_H__
|
|
#define __ISA_HC_PROTOCOL_H__
|
|
|
|
#define EFI_ISA_HC_PROTOCOL_GUID \
|
|
{ \
|
|
0xbcdaf080, 0x1bde, 0x4e22, {0xae, 0x6a, 0x43, 0x54, 0x1e, 0x12, 0x8e, 0xc4} \
|
|
}
|
|
|
|
#define EFI_ISA_HC_SERVICE_BINDING_PROTOCOL_GUID \
|
|
{ \
|
|
0xfad7933a, 0x6c21, 0x4234, {0xa4, 0x34, 0x0a, 0x8a, 0x0d, 0x2b, 0x07, 0x81} \
|
|
}
|
|
|
|
typedef struct _EFI_ISA_HC_PROTOCOL EFI_ISA_HC_PROTOCOL;
|
|
typedef struct _EFI_ISA_HC_PROTOCOL *PEFI_ISA_HC_PROTOCOL;
|
|
|
|
/**
|
|
Open I/O aperture.
|
|
|
|
This function opens an I/O aperture in a ISA Host Controller for the I/O addresses
|
|
specified by IoAddress to IoAddress + IoLength - 1. It may be possible that a
|
|
single hardware aperture may be used for more than one device. This function
|
|
tracks the number of times that each aperture is referenced, and does not close
|
|
the hardware aperture (via CloseIoAperture()) until there are no more references to it.
|
|
|
|
@param This A pointer to this instance of the EFI_ISA_HC_PROTOCOL.
|
|
@param IoAddress An unsigned integer that specifies the first byte of the
|
|
I/O space required.
|
|
@param IoLength An unsigned integer that specifies the number of bytes
|
|
of the I/O space required.
|
|
@param IoApertureHandle A pointer to the returned I/O aperture handle. This
|
|
value can be used on subsequent calls to CloseIoAperture().
|
|
|
|
@retval EFI_SUCCESS The I/O aperture was opened successfully.
|
|
@retval EFI_UNSUPPORTED The ISA Host Controller is a subtractive-decode controller.
|
|
@retval EFI_OUT_OF_RESOURCES There is no available I/O aperture.
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_ISA_HC_OPEN_IO) (
|
|
IN CONST EFI_ISA_HC_PROTOCOL *This,
|
|
IN UINT16 IoAddress,
|
|
IN UINT16 IoLength,
|
|
OUT UINT64 *IoApertureHandle
|
|
);
|
|
|
|
/**
|
|
Close I/O aperture.
|
|
|
|
This function closes a previously opened I/O aperture handle. If there are no
|
|
more I/O aperture handles that refer to the hardware I/O aperture resource,
|
|
then the hardware I/O aperture is closed. It may be possible that a single
|
|
hardware aperture may be used for more than one device. This function tracks
|
|
the number of times that each aperture is referenced, and does not close the
|
|
hardware aperture (via CloseIoAperture()) until there are no more references to it.
|
|
|
|
@param This A pointer to this instance of the EFI_ISA_HC_PROTOCOL.
|
|
@param IoApertureHandle The I/O aperture handle previously returned from a
|
|
call to OpenIoAperture().
|
|
|
|
@retval EFI_SUCCESS The IO aperture was closed successfully.
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_ISA_HC_CLOSE_IO) (
|
|
IN CONST EFI_ISA_HC_PROTOCOL *This,
|
|
IN UINT64 IoApertureHandle
|
|
);
|
|
|
|
///
|
|
/// ISA HC Protocol
|
|
///
|
|
struct _EFI_ISA_HC_PROTOCOL {
|
|
///
|
|
/// The version of this protocol. Higher version numbers are backward
|
|
/// compatible with lower version numbers.
|
|
///
|
|
UINT32 Version;
|
|
///
|
|
/// Open an I/O aperture.
|
|
///
|
|
EFI_ISA_HC_OPEN_IO OpenIoAperture;
|
|
///
|
|
/// Close an I/O aperture.
|
|
///
|
|
EFI_ISA_HC_CLOSE_IO CloseIoAperture;
|
|
};
|
|
|
|
///
|
|
/// Reference to variable defined in the .DEC file
|
|
///
|
|
extern EFI_GUID gEfiIsaHcProtocolGuid;
|
|
extern EFI_GUID gEfiIsaHcServiceBindingProtocolGuid;
|
|
|
|
#endif // __ISA_HC_H__
|