/** @file\r
Provides the parent dispatch service for the periodical timer SMI source generator.\r
\r
- Copyright (c) 2007, Intel Corporation\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Module Name: SmmPeriodicTimerDispatch.h\r
+Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
@par Revision Reference:\r
This Protocol is defined in Framework of EFI SMM Core Interface Spec\r
#ifndef _EFI_SMM_PERIODIC_TIMER_DISPATCH_H_\r
#define _EFI_SMM_PERIODIC_TIMER_DISPATCH_H_\r
\r
-#include <PiDxe.h>\r
\r
//\r
// Global ID for the Periodic Timer SMI Protocol\r
//\r
// Related Definitions\r
//\r
-//\r
-// Period is the minimum period of time in 100 nanosecond units that child gets called.\r
-// The child will be called back after a time greater than the time Period.\r
-//\r
-// SmiTickInterval is the period of time interval between SMIs. Children of this interface\r
-// should use this field when registering for periodic timer intervals when a finer\r
-// granularity periodic SMI is desired. Valid values for this field are those returned\r
-// by GetNextInterval. A value of 0 indicates the parent is allowed to use any SMI\r
-// interval period to satisfy the requested period.\r
-// Example: A chipset supports periodic SMIs on every 64ms or 2 seconds.\r
-// A child wishes schedule a period SMI to fire on a period of 3 seconds, there\r
-// are several ways to approach the problem:\r
-// 1. The child may accept a 4 second periodic rate, in which case it registers with\r
-// Period = 40000\r
-// SmiTickInterval = 20000\r
-// The resulting SMI will occur every 2 seconds with the child called back on\r
-// every 2nd SMI.\r
-// NOTE: the same result would occur if the child set SmiTickInterval = 0.\r
-// 2. The child may choose the finer granularity SMI (64ms):\r
-// Period = 30000\r
-// SmiTickInterval = 640\r
-// The resulting SMI will occur every 64ms with the child called back on\r
-// every 47th SMI.\r
-// NOTE: the child driver should be aware that this will result in more\r
-// SMIs occuring during system runtime which can negatively impact system\r
-// performance.\r
-//\r
-// ElapsedTime is the actual time in 100 nanosecond units elapsed since last called, a\r
-// value of 0 indicates an unknown amount of time.\r
-//\r
+\r
typedef struct {\r
+ ///\r
+ /// The minimum period of time that the child gets called, in 100 nanosecond units.\r
+ /// The child will be called back after a time greater than the time Period.\r
+ ///\r
UINT64 Period;\r
+ ///\r
+ /// The period of time interval between SMIs. Children of this interface\r
+ /// should use this field when registering for periodic timer intervals when a finer\r
+ /// granularity periodic SMI is desired. Valid values for this field are those returned\r
+ /// by GetNextInterval. A value of 0 indicates the parent is allowed to use any SMI\r
+ /// interval period to satisfy the requested period.\r
+ ///\r
UINT64 SmiTickInterval;\r
+ ///\r
+ /// The actual time in 100 nanosecond units elapsed since last called. A\r
+ /// value of 0 indicates an unknown amount of time.\r
+ ///\r
UINT64 ElapsedTime;\r
} EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT;\r
\r
/**\r
Dispatch function for a Periodic Timer SMI handler.\r
\r
- @param DispatchHandle Handle of this dispatch function.\r
- @param DispatchContext Pointer to the dispatch function's context.\r
+ @param DispatchHandle The handle of this dispatch function.\r
+ @param DispatchContext The pointer to the dispatch function's context.\r
The DispatchContext fields are filled in\r
by the dispatching driver prior to\r
invoking this dispatch function.\r
\r
- Nothing\r
+ @return None\r
\r
**/\r
typedef\r
VOID\r
-(EFIAPI *EFI_SMM_PERIODIC_TIMER_DISPATCH) (\r
- IN EFI_HANDLE DispatchHandle,\r
- IN EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT *DispatchContext\r
+(EFIAPI *EFI_SMM_PERIODIC_TIMER_DISPATCH)(\r
+ IN EFI_HANDLE DispatchHandle,\r
+ IN EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT *DispatchContext\r
);\r
\r
/**\r
Returns the next SMI tick period supported by the chipset. The order\r
returned is from longest to shortest interval period.\r
\r
- @param This Protocol instance pointer.\r
- @param SmiTickInterval Pointer to pointer of next shorter SMI interval\r
+ @param This The protocol instance pointer.\r
+ @param SmiTickInterval The pointer to pointer of next shorter SMI interval\r
period supported by the child. This parameter works as a get-first,\r
- get-next field.The first time this function is called, *SmiTickInterval\r
- should be set to NULL to get the longest SMI interval.The returned\r
+ get-next field. The first time this function is called, *SmiTickInterval\r
+ should be set to NULL to get the longest SMI interval. The returned\r
*SmiTickInterval should be passed in on subsequent calls to get the\r
next shorter interval period until *SmiTickInterval = NULL.\r
\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SMM_PERIODIC_TIMER_INTERVAL) (\r
+(EFIAPI *EFI_SMM_PERIODIC_TIMER_INTERVAL)(\r
IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
IN OUT UINT64 **SmiTickInterval\r
);\r
/**\r
Register a child SMI source dispatch function with a parent SMM driver\r
\r
- @param This Protocol instance pointer.\r
- @param DispatchFunction Pointer to dispatch function to be invoked for\r
- this SMI source\r
- @param DispatchContext Pointer to the dispatch function's context.\r
- The caller fills this context in before calling\r
- the register function to indicate to the register\r
+ @param This The pointer to the EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL instance.\r
+ @param DispatchFunction The function to install.\r
+ @param DispatchContext The pointer to the dispatch function's context.\r
+ Indicates to the register\r
function the period at which the dispatch function\r
should be invoked.\r
- @param DispatchHandle Handle of dispatch function, for when interfacing\r
- with the parent Sx state SMM driver.\r
+ @param DispatchHandle The handle generated by the dispatcher to track the function instance.\r
\r
@retval EFI_SUCCESS The dispatch function has been successfully\r
- registered and the SMI source has been enabled.\r
+ registered, and the SMI source has been enabled.\r
@retval EFI_DEVICE_ERROR The driver was unable to enable the SMI source.\r
@retval EFI_OUT_OF_RESOURCES Not enough memory (system or SMM) to manage this\r
child.\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SMM_PERIODIC_TIMER_REGISTER) (\r
- IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
- IN EFI_SMM_PERIODIC_TIMER_DISPATCH DispatchFunction,\r
- IN EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT *DispatchContext,\r
- OUT EFI_HANDLE *DispatchHandle\r
+(EFIAPI *EFI_SMM_PERIODIC_TIMER_REGISTER)(\r
+ IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
+ IN EFI_SMM_PERIODIC_TIMER_DISPATCH DispatchFunction,\r
+ IN EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT *DispatchContext,\r
+ OUT EFI_HANDLE *DispatchHandle\r
);\r
\r
/**\r
- Unregister a child SMI source dispatch function with a parent SMM driver\r
+ Unregisters a periodic timer service.\r
\r
- @param This Protocol instance pointer.\r
- @param DispatchHandle Handle of dispatch function to deregister.\r
+ @param This The pointer to the EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL instance.\r
+ @param DispatchHandle The handle of the service to remove.\r
\r
@retval EFI_SUCCESS The dispatch function has been successfully\r
- unregistered and the SMI source has been disabled\r
+ unregistered, and the SMI source has been disabled\r
if there are no other registered child dispatch\r
functions for this SMI source.\r
- @retval EFI_INVALID_PARAMETER Handle is invalid.\r
+ @retval EFI_INVALID_PARAMETER The handle is invalid.\r
\r
**/\r
typedef\r
EFI_STATUS\r
-(EFIAPI *EFI_SMM_PERIODIC_TIMER_UNREGISTER) (\r
- IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
- IN EFI_HANDLE DispatchHandle\r
+(EFIAPI *EFI_SMM_PERIODIC_TIMER_UNREGISTER)(\r
+ IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
+ IN EFI_HANDLE DispatchHandle\r
);\r
\r
//\r
// Interface structure for the SMM Periodic Timer Dispatch Protocol\r
//\r
/**\r
- @par Protocol Description:\r
Provides the parent dispatch service for the periodical timer SMI source generator.\r
-\r
- @param Register\r
- Installs a child service to be dispatched by this protocol.\r
-\r
- @param UnRegister\r
- Removes a child service dispatched by this protocol.\r
-\r
- @param GetNextShorterInterval\r
- Returns the next SMI tick period that is supported by the chipset.\r
-\r
**/\r
struct _EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL {\r
+ ///\r
+ /// Installs a child service to be dispatched by this protocol.\r
+ ///\r
EFI_SMM_PERIODIC_TIMER_REGISTER Register;\r
+\r
+ ///\r
+ /// Removes a child service dispatched by this protocol.\r
+ ///\r
EFI_SMM_PERIODIC_TIMER_UNREGISTER UnRegister;\r
+\r
+ ///\r
+ /// Returns the next SMI tick period that is supported by the chipset.\r
+ ///\r
EFI_SMM_PERIODIC_TIMER_INTERVAL GetNextShorterInterval;\r
};\r
\r
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