4 Copyright (c) 2008 - 2010, 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>
35 #define INTERRUPT_VECTOR_NUMBER 256
37 #define EFI_MEMORY_CACHETYPE_MASK (EFI_MEMORY_UC | \
46 Flush CPU data cache. If the instruction cache is fully coherent
47 with all DMA operations then function can just return EFI_SUCCESS.
49 @param This Protocol instance structure
50 @param Start Physical address to start flushing from.
51 @param Length Number of bytes to flush. Round up to chipset
53 @param FlushType Specifies the type of flush operation to perform.
55 @retval EFI_SUCCESS If cache was flushed
56 @retval EFI_UNSUPPORTED If flush type is not supported.
57 @retval EFI_DEVICE_ERROR If requested range could not be flushed.
62 CpuFlushCpuDataCache (
63 IN EFI_CPU_ARCH_PROTOCOL
*This
,
64 IN EFI_PHYSICAL_ADDRESS Start
,
66 IN EFI_CPU_FLUSH_TYPE FlushType
70 Enables CPU interrupts.
72 @param This Protocol instance structure
74 @retval EFI_SUCCESS If interrupts were enabled in the CPU
75 @retval EFI_DEVICE_ERROR If interrupts could not be enabled on the CPU.
81 IN EFI_CPU_ARCH_PROTOCOL
*This
85 Disables CPU interrupts.
87 @param This Protocol instance structure
89 @retval EFI_SUCCESS If interrupts were disabled in the CPU.
90 @retval EFI_DEVICE_ERROR If interrupts could not be disabled on the CPU.
96 IN EFI_CPU_ARCH_PROTOCOL
*This
100 Return the state of interrupts.
102 @param This Protocol instance structure
103 @param State Pointer to the CPU's current interrupt state
105 @retval EFI_SUCCESS If interrupts were disabled in the CPU.
106 @retval EFI_INVALID_PARAMETER State is NULL.
111 CpuGetInterruptState (
112 IN EFI_CPU_ARCH_PROTOCOL
*This
,
117 Generates an INIT to the CPU.
119 @param This Protocol instance structure
120 @param InitType Type of CPU INIT to perform
122 @retval EFI_SUCCESS If CPU INIT occurred. This value should never be
124 @retval EFI_DEVICE_ERROR If CPU INIT failed.
125 @retval EFI_UNSUPPORTED Requested type of CPU INIT not supported.
131 IN EFI_CPU_ARCH_PROTOCOL
*This
,
132 IN EFI_CPU_INIT_TYPE InitType
136 Registers a function to be called from the CPU interrupt handler.
138 @param This Protocol instance structure
139 @param InterruptType Defines which interrupt to hook. IA-32
140 valid range is 0x00 through 0xFF
141 @param InterruptHandler A pointer to a function of type
142 EFI_CPU_INTERRUPT_HANDLER that is called
143 when a processor interrupt occurs. A null
144 pointer is an error condition.
146 @retval EFI_SUCCESS If handler installed or uninstalled.
147 @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
148 for InterruptType was previously installed.
149 @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
150 InterruptType was not previously installed.
151 @retval EFI_UNSUPPORTED The interrupt specified by InterruptType
157 CpuRegisterInterruptHandler (
158 IN EFI_CPU_ARCH_PROTOCOL
*This
,
159 IN EFI_EXCEPTION_TYPE InterruptType
,
160 IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
164 Returns a timer value from one of the CPU's internal timers. There is no
165 inherent time interval between ticks but is a function of the CPU frequency.
167 @param This - Protocol instance structure.
168 @param TimerIndex - Specifies which CPU timer is requested.
169 @param TimerValue - Pointer to the returned timer value.
170 @param TimerPeriod - A pointer to the amount of time that passes
171 in femtoseconds (10-15) for each increment
172 of TimerValue. If TimerValue does not
173 increment at a predictable rate, then 0 is
174 returned. The amount of time that has
175 passed between two calls to GetTimerValue()
176 can be calculated with the formula
177 (TimerValue2 - TimerValue1) * TimerPeriod.
178 This parameter is optional and may be NULL.
180 @retval EFI_SUCCESS - If the CPU timer count was returned.
181 @retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.
182 @retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.
183 @retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.
189 IN EFI_CPU_ARCH_PROTOCOL
*This
,
190 IN UINT32 TimerIndex
,
191 OUT UINT64
*TimerValue
,
192 OUT UINT64
*TimerPeriod OPTIONAL
196 Set memory cacheability attributes for given range of memeory.
198 @param This Protocol instance structure
199 @param BaseAddress Specifies the start address of the
201 @param Length Specifies the length of the memory range
202 @param Attributes The memory cacheability for the memory range
204 @retval EFI_SUCCESS If the cacheability of that memory range is
206 @retval EFI_UNSUPPORTED If the desired operation cannot be done
207 @retval EFI_INVALID_PARAMETER The input parameter is not correct,
213 CpuSetMemoryAttributes (
214 IN EFI_CPU_ARCH_PROTOCOL
*This
,
215 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
221 Label of base address of IDT vector 0.
223 This is just a label of base address of IDT vector 0.
233 Initializes the pointer to the external interrupt vector table.
235 @param VectorTable Address of the external interrupt vector table.
240 InitializeExternalVectorTablePtr (
241 EFI_CPU_INTERRUPT_HANDLER
*VectorTable
245 Initialize Global Descriptor Table.
249 InitGlobalDescriptorTable (
254 Sets the code selector (CS).
256 @param Selector Value of code selector.
266 Sets the data selector (DS).
268 @param Selector Value of data selector.