4 Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
20 #include <Protocol/Cpu.h>
22 #include <Library/UefiDriverEntryPoint.h>
23 #include <Library/UefiBootServicesTableLib.h>
24 #include <Library/DxeServicesTableLib.h>
25 #include <Library/BaseLib.h>
26 #include <Library/CpuLib.h>
27 #include <Library/BaseMemoryLib.h>
28 #include <Library/MemoryAllocationLib.h>
29 #include <Library/DebugLib.h>
30 #include <Library/MtrrLib.h>
31 #include <Library/LocalApicLib.h>
32 #include <Library/UefiCpuLib.h>
33 #include <Library/UefiLib.h>
34 #include <Library/CpuExceptionHandlerLib.h>
35 #include <Library/TimerLib.h>
36 #include <Guid/IdleLoopEvent.h>
37 #include <Guid/VectorHandoffTable.h>
39 #define EFI_MEMORY_CACHETYPE_MASK (EFI_MEMORY_UC | \
48 Flush CPU data cache. If the instruction cache is fully coherent
49 with all DMA operations then function can just return EFI_SUCCESS.
51 @param This Protocol instance structure
52 @param Start Physical address to start flushing from.
53 @param Length Number of bytes to flush. Round up to chipset
55 @param FlushType Specifies the type of flush operation to perform.
57 @retval EFI_SUCCESS If cache was flushed
58 @retval EFI_UNSUPPORTED If flush type is not supported.
59 @retval EFI_DEVICE_ERROR If requested range could not be flushed.
64 CpuFlushCpuDataCache (
65 IN EFI_CPU_ARCH_PROTOCOL
*This
,
66 IN EFI_PHYSICAL_ADDRESS Start
,
68 IN EFI_CPU_FLUSH_TYPE FlushType
72 Enables CPU interrupts.
74 @param This Protocol instance structure
76 @retval EFI_SUCCESS If interrupts were enabled in the CPU
77 @retval EFI_DEVICE_ERROR If interrupts could not be enabled on the CPU.
83 IN EFI_CPU_ARCH_PROTOCOL
*This
87 Disables CPU interrupts.
89 @param This Protocol instance structure
91 @retval EFI_SUCCESS If interrupts were disabled in the CPU.
92 @retval EFI_DEVICE_ERROR If interrupts could not be disabled on the CPU.
98 IN EFI_CPU_ARCH_PROTOCOL
*This
102 Return the state of interrupts.
104 @param This Protocol instance structure
105 @param State Pointer to the CPU's current interrupt state
107 @retval EFI_SUCCESS If interrupts were disabled in the CPU.
108 @retval EFI_INVALID_PARAMETER State is NULL.
113 CpuGetInterruptState (
114 IN EFI_CPU_ARCH_PROTOCOL
*This
,
119 Generates an INIT to the CPU.
121 @param This Protocol instance structure
122 @param InitType Type of CPU INIT to perform
124 @retval EFI_SUCCESS If CPU INIT occurred. This value should never be
126 @retval EFI_DEVICE_ERROR If CPU INIT failed.
127 @retval EFI_UNSUPPORTED Requested type of CPU INIT not supported.
133 IN EFI_CPU_ARCH_PROTOCOL
*This
,
134 IN EFI_CPU_INIT_TYPE InitType
138 Registers a function to be called from the CPU interrupt handler.
140 @param This Protocol instance structure
141 @param InterruptType Defines which interrupt to hook. IA-32
142 valid range is 0x00 through 0xFF
143 @param InterruptHandler A pointer to a function of type
144 EFI_CPU_INTERRUPT_HANDLER that is called
145 when a processor interrupt occurs. A null
146 pointer is an error condition.
148 @retval EFI_SUCCESS If handler installed or uninstalled.
149 @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
150 for InterruptType was previously installed.
151 @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
152 InterruptType was not previously installed.
153 @retval EFI_UNSUPPORTED The interrupt specified by InterruptType
159 CpuRegisterInterruptHandler (
160 IN EFI_CPU_ARCH_PROTOCOL
*This
,
161 IN EFI_EXCEPTION_TYPE InterruptType
,
162 IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
166 Returns a timer value from one of the CPU's internal timers. There is no
167 inherent time interval between ticks but is a function of the CPU frequency.
169 @param This - Protocol instance structure.
170 @param TimerIndex - Specifies which CPU timer is requested.
171 @param TimerValue - Pointer to the returned timer value.
172 @param TimerPeriod - A pointer to the amount of time that passes
173 in femtoseconds (10-15) for each increment
174 of TimerValue. If TimerValue does not
175 increment at a predictable rate, then 0 is
176 returned. The amount of time that has
177 passed between two calls to GetTimerValue()
178 can be calculated with the formula
179 (TimerValue2 - TimerValue1) * TimerPeriod.
180 This parameter is optional and may be NULL.
182 @retval EFI_SUCCESS - If the CPU timer count was returned.
183 @retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.
184 @retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.
185 @retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.
191 IN EFI_CPU_ARCH_PROTOCOL
*This
,
192 IN UINT32 TimerIndex
,
193 OUT UINT64
*TimerValue
,
194 OUT UINT64
*TimerPeriod OPTIONAL
198 Set memory cacheability attributes for given range of memeory.
200 @param This Protocol instance structure
201 @param BaseAddress Specifies the start address of the
203 @param Length Specifies the length of the memory range
204 @param Attributes The memory cacheability for the memory range
206 @retval EFI_SUCCESS If the cacheability of that memory range is
208 @retval EFI_UNSUPPORTED If the desired operation cannot be done
209 @retval EFI_INVALID_PARAMETER The input parameter is not correct,
215 CpuSetMemoryAttributes (
216 IN EFI_CPU_ARCH_PROTOCOL
*This
,
217 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
223 Initialize Global Descriptor Table.
227 InitGlobalDescriptorTable (
232 Sets the code selector (CS).
234 @param Selector Value of code selector.
244 Sets the data selector (DS).
246 @param Selector Value of data selector.