4 Copyright (c) 2008 - 2012, 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 <Guid/IdleLoopEvent.h>
38 #define INTERRUPT_VECTOR_NUMBER 256
40 #define EFI_MEMORY_CACHETYPE_MASK (EFI_MEMORY_UC | \
49 Flush CPU data cache. If the instruction cache is fully coherent
50 with all DMA operations then function can just return EFI_SUCCESS.
52 @param This Protocol instance structure
53 @param Start Physical address to start flushing from.
54 @param Length Number of bytes to flush. Round up to chipset
56 @param FlushType Specifies the type of flush operation to perform.
58 @retval EFI_SUCCESS If cache was flushed
59 @retval EFI_UNSUPPORTED If flush type is not supported.
60 @retval EFI_DEVICE_ERROR If requested range could not be flushed.
65 CpuFlushCpuDataCache (
66 IN EFI_CPU_ARCH_PROTOCOL
*This
,
67 IN EFI_PHYSICAL_ADDRESS Start
,
69 IN EFI_CPU_FLUSH_TYPE FlushType
73 Enables CPU interrupts.
75 @param This Protocol instance structure
77 @retval EFI_SUCCESS If interrupts were enabled in the CPU
78 @retval EFI_DEVICE_ERROR If interrupts could not be enabled on the CPU.
84 IN EFI_CPU_ARCH_PROTOCOL
*This
88 Disables CPU interrupts.
90 @param This Protocol instance structure
92 @retval EFI_SUCCESS If interrupts were disabled in the CPU.
93 @retval EFI_DEVICE_ERROR If interrupts could not be disabled on the CPU.
99 IN EFI_CPU_ARCH_PROTOCOL
*This
103 Return the state of interrupts.
105 @param This Protocol instance structure
106 @param State Pointer to the CPU's current interrupt state
108 @retval EFI_SUCCESS If interrupts were disabled in the CPU.
109 @retval EFI_INVALID_PARAMETER State is NULL.
114 CpuGetInterruptState (
115 IN EFI_CPU_ARCH_PROTOCOL
*This
,
120 Generates an INIT to the CPU.
122 @param This Protocol instance structure
123 @param InitType Type of CPU INIT to perform
125 @retval EFI_SUCCESS If CPU INIT occurred. This value should never be
127 @retval EFI_DEVICE_ERROR If CPU INIT failed.
128 @retval EFI_UNSUPPORTED Requested type of CPU INIT not supported.
134 IN EFI_CPU_ARCH_PROTOCOL
*This
,
135 IN EFI_CPU_INIT_TYPE InitType
139 Registers a function to be called from the CPU interrupt handler.
141 @param This Protocol instance structure
142 @param InterruptType Defines which interrupt to hook. IA-32
143 valid range is 0x00 through 0xFF
144 @param InterruptHandler A pointer to a function of type
145 EFI_CPU_INTERRUPT_HANDLER that is called
146 when a processor interrupt occurs. A null
147 pointer is an error condition.
149 @retval EFI_SUCCESS If handler installed or uninstalled.
150 @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
151 for InterruptType was previously installed.
152 @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
153 InterruptType was not previously installed.
154 @retval EFI_UNSUPPORTED The interrupt specified by InterruptType
160 CpuRegisterInterruptHandler (
161 IN EFI_CPU_ARCH_PROTOCOL
*This
,
162 IN EFI_EXCEPTION_TYPE InterruptType
,
163 IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
167 Returns a timer value from one of the CPU's internal timers. There is no
168 inherent time interval between ticks but is a function of the CPU frequency.
170 @param This - Protocol instance structure.
171 @param TimerIndex - Specifies which CPU timer is requested.
172 @param TimerValue - Pointer to the returned timer value.
173 @param TimerPeriod - A pointer to the amount of time that passes
174 in femtoseconds (10-15) for each increment
175 of TimerValue. If TimerValue does not
176 increment at a predictable rate, then 0 is
177 returned. The amount of time that has
178 passed between two calls to GetTimerValue()
179 can be calculated with the formula
180 (TimerValue2 - TimerValue1) * TimerPeriod.
181 This parameter is optional and may be NULL.
183 @retval EFI_SUCCESS - If the CPU timer count was returned.
184 @retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.
185 @retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.
186 @retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.
192 IN EFI_CPU_ARCH_PROTOCOL
*This
,
193 IN UINT32 TimerIndex
,
194 OUT UINT64
*TimerValue
,
195 OUT UINT64
*TimerPeriod OPTIONAL
199 Set memory cacheability attributes for given range of memeory.
201 @param This Protocol instance structure
202 @param BaseAddress Specifies the start address of the
204 @param Length Specifies the length of the memory range
205 @param Attributes The memory cacheability for the memory range
207 @retval EFI_SUCCESS If the cacheability of that memory range is
209 @retval EFI_UNSUPPORTED If the desired operation cannot be done
210 @retval EFI_INVALID_PARAMETER The input parameter is not correct,
216 CpuSetMemoryAttributes (
217 IN EFI_CPU_ARCH_PROTOCOL
*This
,
218 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
224 Label of base address of IDT vector 0.
226 This is just a label of base address of IDT vector 0.
236 Initializes the pointer to the external interrupt vector table.
238 @param VectorTable Address of the external interrupt vector table.
243 InitializeExternalVectorTablePtr (
244 EFI_CPU_INTERRUPT_HANDLER
*VectorTable
248 Initialize Global Descriptor Table.
252 InitGlobalDescriptorTable (
257 Sets the code selector (CS).
259 @param Selector Value of code selector.
269 Sets the data selector (DS).
271 @param Selector Value of data selector.
281 Restore original Interrupt Descriptor Table Handler Address.
283 @param Index The Index of the interrupt descriptor table handle.
287 RestoreInterruptDescriptorTableHandlerAddress (