diff options
| -rw-r--r-- | MdePkg/Include/Protocol/Cpu.h | 4 | ||||
| -rw-r--r-- | UefiCpuPkg/CpuDxe/CpuDxe.c | 43 |
2 files changed, 32 insertions, 15 deletions
diff --git a/MdePkg/Include/Protocol/Cpu.h b/MdePkg/Include/Protocol/Cpu.h index e12888f57d..4d95329d5d 100644 --- a/MdePkg/Include/Protocol/Cpu.h +++ b/MdePkg/Include/Protocol/Cpu.h @@ -3,7 +3,7 @@ This code abstracts the DXE core from processor implementation details.
- Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
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
@@ -244,6 +244,8 @@ EFI_STATUS @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
+ Attributes specified an illegal combination of attributes that
+ cannot be set together.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c index 99fdbd7757..10ad86da75 100644 --- a/UefiCpuPkg/CpuDxe/CpuDxe.c +++ b/UefiCpuPkg/CpuDxe/CpuDxe.c @@ -581,19 +581,28 @@ CpuGetTimerValue ( /**
- Set memory cacheability attributes for given range of memeory.
-
- @param This Protocol instance structure
- @param BaseAddress Specifies the start address of the
- memory range
- @param Length Specifies the length of the memory range
- @param Attributes The memory cacheability for the memory range
-
- @retval EFI_SUCCESS If the cacheability of that memory range is
- set successfully
- @retval EFI_UNSUPPORTED If the desired operation cannot be done
- @retval EFI_INVALID_PARAMETER The input parameter is not correct,
- such as Length = 0
+ Implementation of SetMemoryAttributes() service of CPU Architecture Protocol.
+
+ This function modifies the attributes for the memory region specified by BaseAddress and
+ Length from their current attributes to the attributes specified by Attributes.
+
+ @param This The EFI_CPU_ARCH_PROTOCOL instance.
+ @param BaseAddress The physical address that is the start address of a memory region.
+ @param Length The size in bytes of the memory region.
+ @param Attributes The bit mask of attributes to set for the memory region.
+
+ @retval EFI_SUCCESS The attributes were set for the memory region.
+ @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
+ BaseAddress and Length cannot be modified.
+ @retval EFI_INVALID_PARAMETER Length is zero.
+ Attributes specified an illegal combination of attributes that
+ cannot be set together.
+ @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
+ the memory resource range.
+ @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
+ resource range specified by BaseAddress and Length.
+ The bit mask of attributes is not support for the memory resource
+ range specified by BaseAddress and Length.
**/
EFI_STATUS
@@ -644,8 +653,14 @@ CpuSetMemoryAttributes ( CacheType = CacheWriteBack;
break;
- default:
+ case EFI_MEMORY_UCE:
+ case EFI_MEMORY_RP:
+ case EFI_MEMORY_XP:
+ case EFI_MEMORY_RUNTIME:
return EFI_UNSUPPORTED;
+
+ default:
+ return EFI_INVALID_PARAMETER;
}
//
// call MTRR libary function
|