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207 lines
7.6 KiB
C
207 lines
7.6 KiB
C
/** @file
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Provides services to maintain instruction and data caches.
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The Cache Maintenance Library provides abstractions for basic processor cache operations.
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It removes the need to use assembly in C code.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __CACHE_MAINTENANCE_LIB__
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#define __CACHE_MAINTENANCE_LIB__
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/**
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Invalidates the entire instruction cache in cache coherency domain of the
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calling CPU.
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**/
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VOID
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EFIAPI
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InvalidateInstructionCache (
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VOID
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);
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/**
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Invalidates a range of instruction cache lines in the cache coherency domain
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of the calling CPU.
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Invalidates the instruction cache lines specified by Address and Length. If
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Address is not aligned on a cache line boundary, then entire instruction
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cache line containing Address is invalidated. If Address + Length is not
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aligned on a cache line boundary, then the entire instruction cache line
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containing Address + Length -1 is invalidated. This function may choose to
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invalidate the entire instruction cache if that is more efficient than
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invalidating the specified range. If Length is 0, then no instruction cache
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lines are invalidated. Address is returned.
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If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT().
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@param Address The base address of the instruction cache lines to
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invalidate. If the CPU is in a physical addressing mode, then
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Address is a physical address. If the CPU is in a virtual
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addressing mode, then Address is a virtual address.
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@param Length The number of bytes to invalidate from the instruction cache.
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@return Address.
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**/
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VOID *
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EFIAPI
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InvalidateInstructionCacheRange (
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IN VOID *Address,
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IN UINTN Length
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);
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/**
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Writes Back and Invalidates the entire data cache in cache coherency domain
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of the calling CPU.
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Writes Back and Invalidates the entire data cache in cache coherency domain
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of the calling CPU. This function guarantees that all dirty cache lines are
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written back to system memory, and also invalidates all the data cache lines
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in the cache coherency domain of the calling CPU.
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**/
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VOID
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EFIAPI
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WriteBackInvalidateDataCache (
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VOID
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);
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/**
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Writes Back and Invalidates a range of data cache lines in the cache
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coherency domain of the calling CPU.
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Writes Back and Invalidate the data cache lines specified by Address and
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Length. If Address is not aligned on a cache line boundary, then entire data
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cache line containing Address is written back and invalidated. If Address +
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Length is not aligned on a cache line boundary, then the entire data cache
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line containing Address + Length -1 is written back and invalidated. This
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function may choose to write back and invalidate the entire data cache if
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that is more efficient than writing back and invalidating the specified
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range. If Length is 0, then no data cache lines are written back and
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invalidated. Address is returned.
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If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT().
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@param Address The base address of the data cache lines to write back and
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invalidate. If the CPU is in a physical addressing mode, then
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Address is a physical address. If the CPU is in a virtual
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addressing mode, then Address is a virtual address.
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@param Length The number of bytes to write back and invalidate from the
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data cache.
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@return Address of cache invalidation.
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**/
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VOID *
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EFIAPI
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WriteBackInvalidateDataCacheRange (
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IN VOID *Address,
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IN UINTN Length
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);
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/**
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Writes Back the entire data cache in cache coherency domain of the calling
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CPU.
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Writes Back the entire data cache in cache coherency domain of the calling
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CPU. This function guarantees that all dirty cache lines are written back to
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system memory. This function may also invalidate all the data cache lines in
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the cache coherency domain of the calling CPU.
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**/
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VOID
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EFIAPI
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WriteBackDataCache (
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VOID
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);
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/**
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Writes Back a range of data cache lines in the cache coherency domain of the
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calling CPU.
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Writes Back the data cache lines specified by Address and Length. If Address
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is not aligned on a cache line boundary, then entire data cache line
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containing Address is written back. If Address + Length is not aligned on a
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cache line boundary, then the entire data cache line containing Address +
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Length -1 is written back. This function may choose to write back the entire
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data cache if that is more efficient than writing back the specified range.
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If Length is 0, then no data cache lines are written back. This function may
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also invalidate all the data cache lines in the specified range of the cache
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coherency domain of the calling CPU. Address is returned.
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If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT().
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@param Address The base address of the data cache lines to write back. If
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the CPU is in a physical addressing mode, then Address is a
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physical address. If the CPU is in a virtual addressing
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mode, then Address is a virtual address.
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@param Length The number of bytes to write back from the data cache.
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@return Address of cache written in main memory.
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**/
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VOID *
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EFIAPI
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WriteBackDataCacheRange (
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IN VOID *Address,
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IN UINTN Length
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);
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/**
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Invalidates the entire data cache in cache coherency domain of the calling
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CPU.
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Invalidates the entire data cache in cache coherency domain of the calling
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CPU. This function must be used with care because dirty cache lines are not
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written back to system memory. It is typically used for cache diagnostics. If
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the CPU does not support invalidation of the entire data cache, then a write
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back and invalidate operation should be performed on the entire data cache.
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**/
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VOID
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EFIAPI
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InvalidateDataCache (
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VOID
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);
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/**
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Invalidates a range of data cache lines in the cache coherency domain of the
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calling CPU.
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Invalidates the data cache lines specified by Address and Length. If Address
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is not aligned on a cache line boundary, then entire data cache line
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containing Address is invalidated. If Address + Length is not aligned on a
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cache line boundary, then the entire data cache line containing Address +
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Length -1 is invalidated. This function must never invalidate any cache lines
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outside the specified range. If Length is 0, the no data cache lines are
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invalidated. Address is returned. This function must be used with care
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because dirty cache lines are not written back to system memory. It is
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typically used for cache diagnostics. If the CPU does not support
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invalidation of a data cache range, then a write back and invalidate
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operation should be performed on the data cache range.
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If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT().
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@param Address The base address of the data cache lines to invalidate. If
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the CPU is in a physical addressing mode, then Address is a
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physical address. If the CPU is in a virtual addressing mode,
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then Address is a virtual address.
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@param Length The number of bytes to invalidate from the data cache.
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@return Address.
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**/
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VOID *
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EFIAPI
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InvalidateDataCacheRange (
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IN VOID *Address,
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IN UINTN Length
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);
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#endif
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