335 lines
8.8 KiB
C
335 lines
8.8 KiB
C
/** @file
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MTRR setting library
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Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _MTRR_LIB_H_
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#define _MTRR_LIB_H_
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//
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// According to IA32 SDM, MTRRs number and msr offset are always consistent
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// for IA32 processor family
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//
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//
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// The semantics of below macro is MAX_MTRR_NUMBER_OF_VARIABLE_MTRR, the real number can be read out from MTRR_CAP register.
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//
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#define MTRR_NUMBER_OF_VARIABLE_MTRR 32
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//
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// Firmware need reserve 2 MTRR for OS
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//
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#define RESERVED_FIRMWARE_VARIABLE_MTRR_NUMBER 2
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#define MTRR_NUMBER_OF_FIXED_MTRR 11
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//
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// Below macro is deprecated, and should not be used.
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//
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#define FIRMWARE_VARIABLE_MTRR_NUMBER 6
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#define MTRR_LIB_IA32_MTRR_CAP 0x0FE
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#define MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK 0x0FF
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#define MTRR_LIB_IA32_MTRR_FIX64K_00000 0x250
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#define MTRR_LIB_IA32_MTRR_FIX16K_80000 0x258
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#define MTRR_LIB_IA32_MTRR_FIX16K_A0000 0x259
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#define MTRR_LIB_IA32_MTRR_FIX4K_C0000 0x268
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#define MTRR_LIB_IA32_MTRR_FIX4K_C8000 0x269
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#define MTRR_LIB_IA32_MTRR_FIX4K_D0000 0x26A
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#define MTRR_LIB_IA32_MTRR_FIX4K_D8000 0x26B
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#define MTRR_LIB_IA32_MTRR_FIX4K_E0000 0x26C
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#define MTRR_LIB_IA32_MTRR_FIX4K_E8000 0x26D
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#define MTRR_LIB_IA32_MTRR_FIX4K_F0000 0x26E
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#define MTRR_LIB_IA32_MTRR_FIX4K_F8000 0x26F
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#define MTRR_LIB_IA32_VARIABLE_MTRR_BASE 0x200
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//
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// Below macro is deprecated, and should not be used.
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//
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#define MTRR_LIB_IA32_VARIABLE_MTRR_END 0x20F
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#define MTRR_LIB_IA32_MTRR_DEF_TYPE 0x2FF
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#define MTRR_LIB_MSR_VALID_MASK 0xFFFFFFFFFULL
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#define MTRR_LIB_CACHE_VALID_ADDRESS 0xFFFFFF000ULL
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#define MTRR_LIB_CACHE_MTRR_ENABLED 0x800
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#define MTRR_LIB_CACHE_FIXED_MTRR_ENABLED 0x400
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//
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// Structure to describe a fixed MTRR
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//
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typedef struct {
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UINT32 Msr;
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UINT32 BaseAddress;
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UINT32 Length;
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} FIXED_MTRR;
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//
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// Structure to describe a variable MTRR
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//
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typedef struct {
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UINT64 BaseAddress;
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UINT64 Length;
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UINT64 Type;
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UINT32 Msr;
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BOOLEAN Valid;
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BOOLEAN Used;
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} VARIABLE_MTRR;
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//
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// Structure to hold base and mask pair for variable MTRR register
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//
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typedef struct _MTRR_VARIABLE_SETTING_ {
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UINT64 Base;
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UINT64 Mask;
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} MTRR_VARIABLE_SETTING;
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//
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// Array for variable MTRRs
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//
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typedef struct _MTRR_VARIABLE_SETTINGS_ {
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MTRR_VARIABLE_SETTING Mtrr[MTRR_NUMBER_OF_VARIABLE_MTRR];
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} MTRR_VARIABLE_SETTINGS;
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//
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// Array for fixed mtrrs
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//
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typedef struct _MTRR_FIXED_SETTINGS_ {
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UINT64 Mtrr[MTRR_NUMBER_OF_FIXED_MTRR];
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} MTRR_FIXED_SETTINGS;
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//
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// Structure to hold all MTRRs
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//
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typedef struct _MTRR_SETTINGS_ {
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MTRR_FIXED_SETTINGS Fixed;
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MTRR_VARIABLE_SETTINGS Variables;
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UINT64 MtrrDefType;
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} MTRR_SETTINGS;
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//
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// Memory cache types
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//
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typedef enum {
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CacheUncacheable = 0,
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CacheWriteCombining = 1,
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CacheWriteThrough = 4,
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CacheWriteProtected = 5,
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CacheWriteBack = 6
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} MTRR_MEMORY_CACHE_TYPE;
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#define MTRR_CACHE_UNCACHEABLE 0
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#define MTRR_CACHE_WRITE_COMBINING 1
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#define MTRR_CACHE_WRITE_THROUGH 4
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#define MTRR_CACHE_WRITE_PROTECTED 5
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#define MTRR_CACHE_WRITE_BACK 6
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#define MTRR_CACHE_INVALID_TYPE 7
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/**
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Returns the variable MTRR count for the CPU.
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@return Variable MTRR count
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**/
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UINT32
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EFIAPI
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GetVariableMtrrCount (
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VOID
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);
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/**
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Returns the firmware usable variable MTRR count for the CPU.
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@return Firmware usable variable MTRR count
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**/
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UINT32
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EFIAPI
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GetFirmwareVariableMtrrCount (
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VOID
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);
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/**
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This function attempts to set the attributes for a memory range.
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@param BaseAddress The physical address that is the start address of a memory region.
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@param Length The size in bytes of the memory region.
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@param Attributes The bit mask of attributes to set for the memory region.
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@retval RETURN_SUCCESS The attributes were set for the memory region.
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@retval RETURN_INVALID_PARAMETER Length is zero.
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@retval RETURN_UNSUPPORTED The processor does not support one or more bytes of the
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memory resource range specified by BaseAddress and Length.
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@retval RETURN_UNSUPPORTED The bit mask of attributes is not support for the memory resource
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range specified by BaseAddress and Length.
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@retval RETURN_ACCESS_DENIED The attributes for the memory resource range specified by
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BaseAddress and Length cannot be modified.
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@retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
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the memory resource range.
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**/
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RETURN_STATUS
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EFIAPI
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MtrrSetMemoryAttribute (
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IN PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length,
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IN MTRR_MEMORY_CACHE_TYPE Attribute
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);
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/**
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This function will get the memory cache type of the specific address.
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This function is mainly for debugging purposes.
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@param Address The specific address
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@return The memory cache type of the specific address
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**/
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MTRR_MEMORY_CACHE_TYPE
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EFIAPI
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MtrrGetMemoryAttribute (
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IN PHYSICAL_ADDRESS Address
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);
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/**
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This function will get the raw value in variable MTRRs
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@param VariableSettings A buffer to hold variable MTRRs content.
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@return The buffer point to MTRR_VARIABLE_SETTINGS in which holds the content of the variable mtrr
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**/
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MTRR_VARIABLE_SETTINGS*
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EFIAPI
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MtrrGetVariableMtrr (
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OUT MTRR_VARIABLE_SETTINGS *VariableSettings
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);
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/**
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This function sets fixed MTRRs
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@param VariableSettings A buffer to hold variable MTRRs content.
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@return The pointer of VariableSettings
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**/
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MTRR_VARIABLE_SETTINGS*
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EFIAPI
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MtrrSetVariableMtrr (
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IN MTRR_VARIABLE_SETTINGS *VariableSettings
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);
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/**
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This function gets the content in fixed MTRRs
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@param FixedSettings A buffer to hold fixed MTRRs content.
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@return The pointer of FixedSettings
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**/
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MTRR_FIXED_SETTINGS*
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EFIAPI
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MtrrGetFixedMtrr (
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OUT MTRR_FIXED_SETTINGS *FixedSettings
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);
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/**
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This function sets fixed MTRRs
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@param FixedSettings A buffer holding fixed MTRRs content.
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@return The pointer of FixedSettings
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**/
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MTRR_FIXED_SETTINGS*
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EFIAPI
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MtrrSetFixedMtrr (
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IN MTRR_FIXED_SETTINGS *FixedSettings
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);
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/**
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This function gets the content in all MTRRs (variable and fixed)
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@param MtrrSetting A buffer to hold all MTRRs content.
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@return The pointer of MtrrSetting
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**/
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MTRR_SETTINGS *
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EFIAPI
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MtrrGetAllMtrrs (
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OUT MTRR_SETTINGS *MtrrSetting
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);
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/**
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This function sets all MTRRs (variable and fixed)
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@param MtrrSetting A buffer to hold all MTRRs content.
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@return The pointer of MtrrSetting
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**/
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MTRR_SETTINGS *
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EFIAPI
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MtrrSetAllMtrrs (
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IN MTRR_SETTINGS *MtrrSetting
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);
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/**
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Get the attribute of variable MTRRs.
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This function shadows the content of variable MTRRs into
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an internal array: VariableMtrr
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@param MtrrValidBitsMask The mask for the valid bit of the MTRR
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@param MtrrValidAddressMask The valid address mask for MTRR since the base address in
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MTRR must align to 4K, so valid address mask equal to
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MtrrValidBitsMask & 0xfffffffffffff000ULL
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@param VariableMtrr The array to shadow variable MTRRs content
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@return The ruturn value of this paramter indicates the number of
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MTRRs which has been used.
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**/
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UINT32
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EFIAPI
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MtrrGetMemoryAttributeInVariableMtrr (
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IN UINT64 MtrrValidBitsMask,
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IN UINT64 MtrrValidAddressMask,
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OUT VARIABLE_MTRR *VariableMtrr
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);
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/**
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This function prints all MTRRs for debugging.
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**/
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VOID
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EFIAPI
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MtrrDebugPrintAllMtrrs (
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VOID
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);
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/**
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Checks if MTRR is supported.
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@retval TRUE MTRR is supported.
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@retval FALSE MTRR is not supported.
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**/
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BOOLEAN
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EFIAPI
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IsMtrrSupported (
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VOID
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);
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#endif // _MTRR_LIB_H_
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