9344f09215
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
131 lines
5.2 KiB
C
131 lines
5.2 KiB
C
/** @file
|
|
MM IO Trap Dispatch Protocol as defined in PI 1.5 Specification
|
|
Volume 4 Management Mode Core Interface.
|
|
|
|
This protocol provides a parent dispatch service for IO trap MMI sources.
|
|
|
|
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
@par Revision Reference:
|
|
This protocol is from PI Version 1.5.
|
|
|
|
**/
|
|
|
|
#ifndef _MM_IO_TRAP_DISPATCH_H_
|
|
#define _MM_IO_TRAP_DISPATCH_H_
|
|
|
|
#include <Pi/PiMmCis.h>
|
|
|
|
#define EFI_MM_IO_TRAP_DISPATCH_PROTOCOL_GUID \
|
|
{ \
|
|
0x58dc368d, 0x7bfa, 0x4e77, {0xab, 0xbc, 0xe, 0x29, 0x41, 0x8d, 0xf9, 0x30 } \
|
|
}
|
|
|
|
///
|
|
/// IO Trap valid types
|
|
///
|
|
typedef enum {
|
|
WriteTrap,
|
|
ReadTrap,
|
|
ReadWriteTrap,
|
|
IoTrapTypeMaximum
|
|
} EFI_MM_IO_TRAP_DISPATCH_TYPE;
|
|
|
|
///
|
|
/// IO Trap context structure containing information about the
|
|
/// IO trap event that should invoke the handler
|
|
///
|
|
typedef struct {
|
|
UINT16 Address;
|
|
UINT16 Length;
|
|
EFI_MM_IO_TRAP_DISPATCH_TYPE Type;
|
|
} EFI_MM_IO_TRAP_REGISTER_CONTEXT;
|
|
|
|
///
|
|
/// IO Trap context structure containing information about the IO trap that occurred
|
|
///
|
|
typedef struct {
|
|
UINT32 WriteData;
|
|
} EFI_MM_IO_TRAP_CONTEXT;
|
|
|
|
typedef struct _EFI_MM_IO_TRAP_DISPATCH_PROTOCOL EFI_MM_IO_TRAP_DISPATCH_PROTOCOL;
|
|
|
|
/**
|
|
Register an IO trap MMI child handler for a specified MMI.
|
|
|
|
This service registers a function (DispatchFunction) which will be called when an MMI is
|
|
generated because of an access to an I/O port specified by RegisterContext. On return,
|
|
DispatchHandle contains a unique handle which may be used later to unregister the function
|
|
using UnRegister(). If the base of the I/O range specified is zero, then an I/O range with the
|
|
specified length and characteristics will be allocated and the Address field in RegisterContext
|
|
updated. If no range could be allocated, then EFI_OUT_OF_RESOURCES will be returned.
|
|
|
|
The service will not perform GCD allocation if the base address is non-zero or
|
|
EFI_MM_READY_TO_LOCK has been installed. In this case, the caller is responsible for the
|
|
existence and allocation of the specific IO range.
|
|
An error may be returned if some or all of the requested resources conflict with an existing IO trap
|
|
child handler.
|
|
|
|
It is not required that implementations will allow multiple children for a single IO trap MMI source.
|
|
Some implementations may support multiple children.
|
|
The DispatchFunction will be called with Context updated to contain information
|
|
concerning the I/O action that actually happened and is passed in RegisterContext, with
|
|
CommBuffer pointing to the data actually written and CommBufferSize pointing to the size of
|
|
the data in CommBuffer.
|
|
|
|
@param[in] This Pointer to the EFI_MM_IO_TRAP_DISPATCH_PROTOCOL instance.
|
|
@param[in] DispatchFunction Function to register for handler when I/O trap location is accessed.
|
|
@param[in] RegisterContext Pointer to the dispatch function's context. The caller fills this
|
|
context in before calling the register function to indicate to the register
|
|
function the IO trap MMI source for which the dispatch function should be invoked.
|
|
@param[out] DispatchHandle Handle of the dispatch function, for when interfacing with the parent MM driver.
|
|
|
|
@retval EFI_SUCCESS The dispatch function has been successfully registered.
|
|
@retval EFI_DEVICE_ERROR The driver was unable to complete due to hardware error.
|
|
@retval EFI_OUT_OF_RESOURCES Insufficient resources are available to fulfill the IO trap range request.
|
|
@retval EFI_INVALID_PARAMETER RegisterContext is invalid. The input value is not within a valid range.
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_MM_IO_TRAP_DISPATCH_REGISTER)(
|
|
IN CONST EFI_MM_IO_TRAP_DISPATCH_PROTOCOL *This,
|
|
IN EFI_MM_HANDLER_ENTRY_POINT DispatchFunction,
|
|
IN OUT EFI_MM_IO_TRAP_REGISTER_CONTEXT *RegisterContext,
|
|
OUT EFI_HANDLE *DispatchHandle
|
|
);
|
|
|
|
/**
|
|
Unregister a child MMI source dispatch function with a parent MM driver.
|
|
|
|
This service removes a previously installed child dispatch handler. This does not guarantee that the
|
|
system resources will be freed from the GCD.
|
|
|
|
@param[in] This Pointer to the EFI_MM_IO_TRAP_DISPATCH_PROTOCOL instance.
|
|
@param[in] DispatchHandle Handle of the child service to remove.
|
|
|
|
@retval EFI_SUCCESS The dispatch function has been successfully unregistered.
|
|
@retval EFI_INVALID_PARAMETER The DispatchHandle was not valid.
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_MM_IO_TRAP_DISPATCH_UNREGISTER)(
|
|
IN CONST EFI_MM_IO_TRAP_DISPATCH_PROTOCOL *This,
|
|
IN EFI_HANDLE DispatchHandle
|
|
);
|
|
|
|
///
|
|
/// Interface structure for the MM IO Trap Dispatch Protocol.
|
|
///
|
|
/// This protocol provides a parent dispatch service for IO trap MMI sources.
|
|
///
|
|
struct _EFI_MM_IO_TRAP_DISPATCH_PROTOCOL {
|
|
EFI_MM_IO_TRAP_DISPATCH_REGISTER Register;
|
|
EFI_MM_IO_TRAP_DISPATCH_UNREGISTER UnRegister;
|
|
};
|
|
|
|
extern EFI_GUID gEfiMmIoTrapDispatchProtocolGuid;
|
|
|
|
#endif
|
|
|