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Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseCacheMaintenanceLib/x86Cache.c')
-rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseCacheMaintenanceLib/x86Cache.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseCacheMaintenanceLib/x86Cache.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseCacheMaintenanceLib/x86Cache.c new file mode 100644 index 0000000..9abbf39 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseCacheMaintenanceLib/x86Cache.c @@ -0,0 +1,254 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. This program and the accompanying materials +are licensed and made available under the terms and conditions of the BSD License +which accompanies this distribution. The full text of the license may be found at +http://opensource.org/licenses/bsd-license.php + +THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + + +Module Name: + + x86Cache.c + +Abstract: + + Cache Maintenance Functions. + +--*/ + +#include "EdkIIGlueBase.h" + +/** + Invalidates the entire instruction cache in cache coherency domain of the + calling CPU. + + Invalidates the entire instruction cache in cache coherency domain of the + calling CPU. + +**/ +VOID +EFIAPI +GlueInvalidateInstructionCache ( + VOID + ) +{ +} + +/** + Invalidates a range of instruction cache lines in the cache coherency domain + of the calling CPU. + + Invalidates the instruction cache lines specified by Address and Length. If + Address is not aligned on a cache line boundary, then entire instruction + cache line containing Address is invalidated. If Address + Length is not + aligned on a cache line boundary, then the entire instruction cache line + containing Address + Length -1 is invalidated. This function may choose to + invalidate the entire instruction cache if that is more efficient than + invalidating the specified range. If Length is 0, the no instruction cache + lines are invalidated. Address is returned. + + If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT(). + + @param Address The base address of the instruction cache lines to + invalidate. If the CPU is in a physical addressing mode, then + Address is a physical address. If the CPU is in a virtual + addressing mode, then Address is a virtual address. + + @param Length The number of bytes to invalidate from the instruction cache. + + @return Address + +**/ +VOID * +EFIAPI +InvalidateInstructionCacheRange ( + IN VOID *Address, + IN UINTN Length + ) +{ + ASSERT (Length <= MAX_ADDRESS - (UINTN)Address + 1); + return Address; +} + +/** + Writes Back and Invalidates the entire data cache in cache coherency domain + of the calling CPU. + + Writes Back and Invalidates the entire data cache in cache coherency domain + of the calling CPU. This function guarantees that all dirty cache lines are + written back to system memory, and also invalidates all the data cache lines + in the cache coherency domain of the calling CPU. + +**/ +VOID +EFIAPI +WriteBackInvalidateDataCache ( + VOID + ) +{ + AsmWbinvd (); +} + +/** + Writes Back and Invalidates a range of data cache lines in the cache + coherency domain of the calling CPU. + + Writes Back and Invalidate the data cache lines specified by Address and + Length. If Address is not aligned on a cache line boundary, then entire data + cache line containing Address is written back and invalidated. If Address + + Length is not aligned on a cache line boundary, then the entire data cache + line containing Address + Length -1 is written back and invalidated. This + function may choose to write back and invalidate the entire data cache if + that is more efficient than writing back and invalidating the specified + range. If Length is 0, the no data cache lines are written back and + invalidated. Address is returned. + + If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT(). + + @param Address The base address of the data cache lines to write back and + invalidate. If the CPU is in a physical addressing mode, then + Address is a physical address. If the CPU is in a virtual + addressing mode, then Address is a virtual address. + @param Length The number of bytes to write back and invalidate from the + data cache. + + @return Address + +**/ +VOID * +EFIAPI +WriteBackInvalidateDataCacheRange ( + IN VOID *Address, + IN UINTN Length + ) +{ + UINT8 (*Uint8Ptr)[32]; + + ASSERT (Length <= MAX_ADDRESS - (UINTN)Address + 1); + + Uint8Ptr = Address; + while (Length > sizeof (*Uint8Ptr)) { + AsmFlushCacheLine (Uint8Ptr++); + Length -= sizeof (*Uint8Ptr); + } + if (Length > 0) { + AsmFlushCacheLine (Uint8Ptr); + AsmFlushCacheLine (&(*Uint8Ptr)[Length - 1]); + } + return Address; +} + +/** + Writes Back the entire data cache in cache coherency domain of the calling + CPU. + + Writes Back the entire data cache in cache coherency domain of the calling + CPU. This function guarantees that all dirty cache lines are written back to + system memory. This function may also invalidate all the data cache lines in + the cache coherency domain of the calling CPU. + +**/ +VOID +EFIAPI +WriteBackDataCache ( + VOID + ) +{ + WriteBackInvalidateDataCache (); +} + +/** + Writes Back a range of data cache lines in the cache coherency domain of the + calling CPU. + + Writes Back the data cache lines specified by Address and Length. If Address + is not aligned on a cache line boundary, then entire data cache line + containing Address is written back. If Address + Length is not aligned on a + cache line boundary, then the entire data cache line containing Address + + Length -1 is written back. This function may choose to write back the entire + data cache if that is more efficient than writing back the specified range. + If Length is 0, the no data cache lines are written back. This function may + also invalidate all the data cache lines in the specified range of the cache + coherency domain of the calling CPU. Address is returned. + + If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT(). + + @param Address The base address of the data cache lines to write back. If + the CPU is in a physical addressing mode, then Address is a + physical address. If the CPU is in a virtual addressing + mode, then Address is a virtual address. + @param Length The number of bytes to write back from the data cache. + + @return Address + +**/ +VOID * +EFIAPI +WriteBackDataCacheRange ( + IN VOID *Address, + IN UINTN Length + ) +{ + return WriteBackInvalidateDataCacheRange (Address, Length); +} + +/** + Invalidates the entire data cache in cache coherency domain of the calling + CPU. + + Invalidates the entire data cache in cache coherency domain of the calling + CPU. This function must be used with care because dirty cache lines are not + written back to system memory. It is typically used for cache diagnostics. If + the CPU does not support invalidation of the entire data cache, then a write + back and invalidate operation should be performed on the entire data cache. + +**/ +VOID +EFIAPI +InvalidateDataCache ( + VOID + ) +{ + AsmInvd (); +} + +/** + Invalidates a range of data cache lines in the cache coherency domain of the + calling CPU. + + Invalidates the data cache lines specified by Address and Length. If Address + is not aligned on a cache line boundary, then entire data cache line + containing Address is invalidated. If Address + Length is not aligned on a + cache line boundary, then the entire data cache line containing Address + + Length -1 is invalidated. This function must never invalidate any cache lines + outside the specified range. If Length is 0, the no data cache lines are + invalidated. Address is returned. This function must be used with care + because dirty cache lines are not written back to system memory. It is + typically used for cache diagnostics. If the CPU does not support + invalidation of a data cache range, then a write back and invalidate + operation should be performed on the data cache range. + + If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT(). + + @param Address The base address of the data cache lines to invalidate. If + the CPU is in a physical addressing mode, then Address is a + physical address. If the CPU is in a virtual addressing mode, + then Address is a virtual address. + @param Length The number of bytes to invalidate from the data cache. + + @return Address + +**/ +VOID * +EFIAPI +InvalidateDataCacheRange ( + IN VOID *Address, + IN UINTN Length + ) +{ + return WriteBackInvalidateDataCacheRange (Address, Length); +} |