[mirror_edk2.git] / OvmfPkg / XenTimerDxe / XenTimerDxe.h

/** @file\r
  Private data structures\r
\r
Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r
Copyright (c) 2019, Citrix Systems, Inc.\r
\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#ifndef _TIMER_H_\r
#define _TIMER_H_\r
\r
#include <PiDxe.h>\r
\r
#include <Protocol/Cpu.h>\r
#include <Protocol/Timer.h>\r
\r
#include <Register/LocalApic.h>\r
\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/LocalApicLib.h>\r
#include <Library/PcdLib.h>\r
\r
// The default timer tick duration is set to 10 ms = 100000 100 ns units\r
//\r
#define DEFAULT_TIMER_TICK_DURATION 100000\r
\r
//\r
// The Timer Vector use for interrupt\r
//\r
#define LOCAL_APIC_TIMER_VECTOR 32\r
\r
//\r
// Function Prototypes\r
//\r
/**\r
  Initialize the Timer Architectural Protocol driver\r
\r
  @param ImageHandle     ImageHandle of the loaded driver\r
  @param SystemTable     Pointer to the System Table\r
\r
  @retval EFI_SUCCESS            Timer Architectural Protocol created\r
  @retval EFI_OUT_OF_RESOURCES   Not enough resources available to initialize driver.\r
  @retval EFI_DEVICE_ERROR       A device error occurred attempting to initialize the driver.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TimerDriverInitialize (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
;\r
\r
/**\r
\r
  This function adjusts the period of timer interrupts to the value specified\r
  by TimerPeriod.  If the timer period is updated, then the selected timer\r
  period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned.  If\r
  the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.\r
  If an error occurs while attempting to update the timer period, then the\r
  timer hardware will be put back in its state prior to this call, and\r
  EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt\r
  is disabled.  This is not the same as disabling the CPU's interrupts.\r
  Instead, it must either turn off the timer hardware, or it must adjust the\r
  interrupt controller so that a CPU interrupt is not generated when the timer\r
  interrupt fires.\r
\r
\r
  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.\r
  @param NotifyFunction  The rate to program the timer interrupt in 100 nS units.  If\r
                         the timer hardware is not programmable, then EFI_UNSUPPORTED is\r
                         returned.  If the timer is programmable, then the timer period\r
                         will be rounded up to the nearest timer period that is supported\r
                         by the timer hardware.  If TimerPeriod is set to 0, then the\r
                         timer interrupts will be disabled.\r
\r
  @retval        EFI_SUCCESS       The timer period was changed.\r
  @retval        EFI_UNSUPPORTED   The platform cannot change the period of the timer interrupt.\r
  @retval        EFI_DEVICE_ERROR  The timer period could not be changed due to a device error.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TimerDriverRegisterHandler (\r
  IN EFI_TIMER_ARCH_PROTOCOL  *This,\r
  IN EFI_TIMER_NOTIFY         NotifyFunction\r
  )\r
;\r
\r
/**\r
\r
  This function adjusts the period of timer interrupts to the value specified\r
  by TimerPeriod.  If the timer period is updated, then the selected timer\r
  period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned.  If\r
  the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.\r
  If an error occurs while attempting to update the timer period, then the\r
  timer hardware will be put back in its state prior to this call, and\r
  EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt\r
  is disabled.  This is not the same as disabling the CPU's interrupts.\r
  Instead, it must either turn off the timer hardware, or it must adjust the\r
  interrupt controller so that a CPU interrupt is not generated when the timer\r
  interrupt fires.\r
\r
\r
  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.\r
  @param TimerPeriod     The rate to program the timer interrupt in 100 nS units.  If\r
                         the timer hardware is not programmable, then EFI_UNSUPPORTED is\r
                         returned.  If the timer is programmable, then the timer period\r
                         will be rounded up to the nearest timer period that is supported\r
                         by the timer hardware.  If TimerPeriod is set to 0, then the\r
                         timer interrupts will be disabled.\r
\r
  @retval        EFI_SUCCESS       The timer period was changed.\r
  @retval        EFI_UNSUPPORTED   The platform cannot change the period of the timer interrupt.\r
  @retval        EFI_DEVICE_ERROR  The timer period could not be changed due to a device error.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TimerDriverSetTimerPeriod (\r
  IN EFI_TIMER_ARCH_PROTOCOL  *This,\r
  IN UINT64                   TimerPeriod\r
  )\r
;\r
\r
/**\r
\r
  This function retrieves the period of timer interrupts in 100 ns units,\r
  returns that value in TimerPeriod, and returns EFI_SUCCESS.  If TimerPeriod\r
  is NULL, then EFI_INVALID_PARAMETER is returned.  If a TimerPeriod of 0 is\r
  returned, then the timer is currently disabled.\r
\r
\r
  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.\r
  @param TimerPeriod     A pointer to the timer period to retrieve in 100 ns units.  If\r
                         0 is returned, then the timer is currently disabled.\r
\r
  @retval EFI_SUCCESS            The timer period was returned in TimerPeriod.\r
  @retval EFI_INVALID_PARAMETER  TimerPeriod is NULL.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TimerDriverGetTimerPeriod (\r
  IN EFI_TIMER_ARCH_PROTOCOL   *This,\r
  OUT UINT64                   *TimerPeriod\r
  )\r
;\r
\r
/**\r
\r
  This function generates a soft timer interrupt. If the platform does not support soft\r
  timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned.\r
  If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler()\r
  service, then a soft timer interrupt will be generated. If the timer interrupt is\r
  enabled when this service is called, then the registered handler will be invoked. The\r
  registered handler should not be able to distinguish a hardware-generated timer\r
  interrupt from a software-generated timer interrupt.\r
\r
\r
  @param This              The EFI_TIMER_ARCH_PROTOCOL instance.\r
\r
  @retval EFI_SUCCESS       The soft timer interrupt was generated.\r
  @retval EFI_UNSUPPORTED   The platform does not support the generation of soft timer interrupts.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TimerDriverGenerateSoftInterrupt (\r
  IN EFI_TIMER_ARCH_PROTOCOL  *This\r
  )\r
;\r
\r
#endif\r
Commit	Line	Data
d668c8bc AP	1	/** @file\r
	2	Private data structures\r
	3	\r
	4	Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r
	5	Copyright (c) 2019, Citrix Systems, Inc.\r
	6	\r
	7	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	8	**/\r
	9	\r
	10	#ifndef _TIMER_H_\r
	11	#define _TIMER_H_\r
	12	\r
	13	#include <PiDxe.h>\r
	14	\r
	15	#include <Protocol/Cpu.h>\r
	16	#include <Protocol/Timer.h>\r
	17	\r
	18	#include <Register/LocalApic.h>\r
	19	\r
	20	#include <Library/UefiBootServicesTableLib.h>\r
	21	#include <Library/BaseLib.h>\r
	22	#include <Library/DebugLib.h>\r
	23	#include <Library/LocalApicLib.h>\r
	24	#include <Library/PcdLib.h>\r
	25	\r
	26	// The default timer tick duration is set to 10 ms = 100000 100 ns units\r
	27	//\r
	28	#define DEFAULT_TIMER_TICK_DURATION 100000\r
	29	\r
	30	//\r
	31	// The Timer Vector use for interrupt\r
	32	//\r
	33	#define LOCAL_APIC_TIMER_VECTOR 32\r
	34	\r
	35	//\r
	36	// Function Prototypes\r
	37	//\r
	38	/**\r
	39	Initialize the Timer Architectural Protocol driver\r
	40	\r
	41	@param ImageHandle ImageHandle of the loaded driver\r
	42	@param SystemTable Pointer to the System Table\r
	43	\r
	44	@retval EFI_SUCCESS Timer Architectural Protocol created\r
	45	@retval EFI_OUT_OF_RESOURCES Not enough resources available to initialize driver.\r
	46	@retval EFI_DEVICE_ERROR A device error occurred attempting to initialize the driver.\r
	47	\r
	48	**/\r
	49	EFI_STATUS\r
	50	EFIAPI\r
	51	TimerDriverInitialize (\r
	52	IN EFI_HANDLE ImageHandle,\r
	53	IN EFI_SYSTEM_TABLE *SystemTable\r
	54	)\r
	55	;\r
	56	\r
	57	/**\r
	58	\r
	59	This function adjusts the period of timer interrupts to the value specified\r
	60	by TimerPeriod. If the timer period is updated, then the selected timer\r
	61	period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If\r
	62	the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.\r
	63	If an error occurs while attempting to update the timer period, then the\r
	64	timer hardware will be put back in its state prior to this call, and\r
65	EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt\r
66	is disabled. This is not the same as disabling the CPU's interrupts.\r
67	Instead, it must either turn off the timer hardware, or it must adjust the\r
68	interrupt controller so that a CPU interrupt is not generated when the timer\r
69	interrupt fires.\r
70	\r
71	\r
72	@param This The EFI_TIMER_ARCH_PROTOCOL instance.\r
73	@param NotifyFunction The rate to program the timer interrupt in 100 nS units. If\r
74	the timer hardware is not programmable, then EFI_UNSUPPORTED is\r
75	returned. If the timer is programmable, then the timer period\r
76	will be rounded up to the nearest timer period that is supported\r
77	by the timer hardware. If TimerPeriod is set to 0, then the\r
78	timer interrupts will be disabled.\r
79	\r
80	@retval EFI_SUCCESS The timer period was changed.\r
81	@retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt.\r
82	@retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error.\r
83	\r
84	**/\r
85	EFI_STATUS\r
86	EFIAPI\r
87	TimerDriverRegisterHandler (\r
88	IN EFI_TIMER_ARCH_PROTOCOL *This,\r
89	IN EFI_TIMER_NOTIFY NotifyFunction\r
90	)\r
91	;\r
92	\r
93	/**\r
94	\r
95	This function adjusts the period of timer interrupts to the value specified\r
96	by TimerPeriod. If the timer period is updated, then the selected timer\r
97	period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If\r
98	the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.\r
99	If an error occurs while attempting to update the timer period, then the\r
100	timer hardware will be put back in its state prior to this call, and\r
101	EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt\r
102	is disabled. This is not the same as disabling the CPU's interrupts.\r
103	Instead, it must either turn off the timer hardware, or it must adjust the\r
104	interrupt controller so that a CPU interrupt is not generated when the timer\r
105	interrupt fires.\r
106	\r
107	\r
108	@param This The EFI_TIMER_ARCH_PROTOCOL instance.\r
109	@param TimerPeriod The rate to program the timer interrupt in 100 nS units. If\r
110	the timer hardware is not programmable, then EFI_UNSUPPORTED is\r
111	returned. If the timer is programmable, then the timer period\r
112	will be rounded up to the nearest timer period that is supported\r
113	by the timer hardware. If TimerPeriod is set to 0, then the\r
114	timer interrupts will be disabled.\r
115	\r
116	@retval EFI_SUCCESS The timer period was changed.\r
117	@retval EFI_UNSUPPORTED The platform cannot change the period of the timer interrupt.\r
118	@retval EFI_DEVICE_ERROR The timer period could not be changed due to a device error.\r
119	\r
120	**/\r
121	EFI_STATUS\r
122	EFIAPI\r
123	TimerDriverSetTimerPeriod (\r
124	IN EFI_TIMER_ARCH_PROTOCOL *This,\r
125	IN UINT64 TimerPeriod\r
126	)\r
127	;\r
128	\r
129	/**\r
130	\r
131	This function retrieves the period of timer interrupts in 100 ns units,\r
132	returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod\r
133	is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is\r
134	returned, then the timer is currently disabled.\r
135	\r
136	\r
137	@param This The EFI_TIMER_ARCH_PROTOCOL instance.\r
138	@param TimerPeriod A pointer to the timer period to retrieve in 100 ns units. If\r
139	0 is returned, then the timer is currently disabled.\r
140	\r
141	@retval EFI_SUCCESS The timer period was returned in TimerPeriod.\r
142	@retval EFI_INVALID_PARAMETER TimerPeriod is NULL.\r
143	\r
144	**/\r
145	EFI_STATUS\r
146	EFIAPI\r
147	TimerDriverGetTimerPeriod (\r
148	IN EFI_TIMER_ARCH_PROTOCOL *This,\r
149	OUT UINT64 *TimerPeriod\r
150	)\r
151	;\r
152	\r
153	/**\r
154	\r
155	This function generates a soft timer interrupt. If the platform does not support soft\r
156	timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned.\r
157	If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler()\r
158	service, then a soft timer interrupt will be generated. If the timer interrupt is\r
159	enabled when this service is called, then the registered handler will be invoked. The\r
160	registered handler should not be able to distinguish a hardware-generated timer\r
161	interrupt from a software-generated timer interrupt.\r
162	\r
163	\r
164	@param This The EFI_TIMER_ARCH_PROTOCOL instance.\r
165	\r
166	@retval EFI_SUCCESS The soft timer interrupt was generated.\r
167	@retval EFI_UNSUPPORTED The platform does not support the generation of soft timer interrupts.\r
168	\r
169	**/\r
170	EFI_STATUS\r
171	EFIAPI\r
172	TimerDriverGenerateSoftInterrupt (\r
173	IN EFI_TIMER_ARCH_PROTOCOL *This\r
174	)\r
175	;\r
176	\r
177	#endif\r