mirror of https://github.com/acidanthera/audk.git
176 lines
8.4 KiB
C
176 lines
8.4 KiB
C
/** @file
|
|
Internal include file for the dummy Legacy Region 2 Protocol implementation.
|
|
|
|
Copyright (c) 2009 - 2018, 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
|
|
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.
|
|
|
|
**/
|
|
|
|
#ifndef __DUMMY_LEGACY_REGION2_H__
|
|
#define __DUMMY_LEGACY_REGION2_H__
|
|
|
|
#include <Protocol/LegacyRegion2.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
|
|
/**
|
|
Modify the hardware to allow (decode) or disallow (not decode) memory reads in a region.
|
|
|
|
If the On parameter evaluates to TRUE, this function enables memory reads in the address range
|
|
Start to (Start + Length - 1).
|
|
If the On parameter evaluates to FALSE, this function disables memory reads in the address range
|
|
Start to (Start + Length - 1).
|
|
|
|
@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.
|
|
@param Start[in] The beginning of the physical address of the region whose attributes
|
|
should be modified.
|
|
@param Length[in] The number of bytes of memory whose attributes should be modified.
|
|
The actual number of bytes modified may be greater than the number
|
|
specified.
|
|
@param Granularity[out] The number of bytes in the last region affected. This may be less
|
|
than the total number of bytes affected if the starting address
|
|
was not aligned to a region's starting address or if the length
|
|
was greater than the number of bytes in the first region.
|
|
@param On[in] Decode / Non-Decode flag.
|
|
|
|
@retval EFI_SUCCESS The region's attributes were successfully modified.
|
|
@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LegacyRegion2Decode (
|
|
IN EFI_LEGACY_REGION2_PROTOCOL *This,
|
|
IN UINT32 Start,
|
|
IN UINT32 Length,
|
|
OUT UINT32 *Granularity,
|
|
IN BOOLEAN *On
|
|
);
|
|
|
|
/**
|
|
Modify the hardware to disallow memory writes in a region.
|
|
|
|
This function changes the attributes of a memory range to not allow writes.
|
|
|
|
@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.
|
|
@param Start[in] The beginning of the physical address of the region whose
|
|
attributes should be modified.
|
|
@param Length[in] The number of bytes of memory whose attributes should be modified.
|
|
The actual number of bytes modified may be greater than the number
|
|
specified.
|
|
@param Granularity[out] The number of bytes in the last region affected. This may be less
|
|
than the total number of bytes affected if the starting address was
|
|
not aligned to a region's starting address or if the length was
|
|
greater than the number of bytes in the first region.
|
|
|
|
@retval EFI_SUCCESS The region's attributes were successfully modified.
|
|
@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LegacyRegion2Lock (
|
|
IN EFI_LEGACY_REGION2_PROTOCOL *This,
|
|
IN UINT32 Start,
|
|
IN UINT32 Length,
|
|
OUT UINT32 *Granularity
|
|
);
|
|
|
|
/**
|
|
Modify the hardware to disallow memory attribute changes in a region.
|
|
|
|
This function makes the attributes of a region read only. Once a region is boot-locked with this
|
|
function, the read and write attributes of that region cannot be changed until a power cycle has
|
|
reset the boot-lock attribute. Calls to Decode(), Lock() and Unlock() will have no effect.
|
|
|
|
@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.
|
|
@param Start[in] The beginning of the physical address of the region whose
|
|
attributes should be modified.
|
|
@param Length[in] The number of bytes of memory whose attributes should be modified.
|
|
The actual number of bytes modified may be greater than the number
|
|
specified.
|
|
@param Granularity[out] The number of bytes in the last region affected. This may be less
|
|
than the total number of bytes affected if the starting address was
|
|
not aligned to a region's starting address or if the length was
|
|
greater than the number of bytes in the first region.
|
|
|
|
@retval EFI_SUCCESS The region's attributes were successfully modified.
|
|
@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.
|
|
@retval EFI_UNSUPPORTED The chipset does not support locking the configuration registers in
|
|
a way that will not affect memory regions outside the legacy memory
|
|
region.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LegacyRegion2BootLock (
|
|
IN EFI_LEGACY_REGION2_PROTOCOL *This,
|
|
IN UINT32 Start,
|
|
IN UINT32 Length,
|
|
OUT UINT32 *Granularity
|
|
);
|
|
|
|
/**
|
|
Modify the hardware to allow memory writes in a region.
|
|
|
|
This function changes the attributes of a memory range to allow writes.
|
|
|
|
@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.
|
|
@param Start[in] The beginning of the physical address of the region whose
|
|
attributes should be modified.
|
|
@param Length[in] The number of bytes of memory whose attributes should be modified.
|
|
The actual number of bytes modified may be greater than the number
|
|
specified.
|
|
@param Granularity[out] The number of bytes in the last region affected. This may be less
|
|
than the total number of bytes affected if the starting address was
|
|
not aligned to a region's starting address or if the length was
|
|
greater than the number of bytes in the first region.
|
|
|
|
@retval EFI_SUCCESS The region's attributes were successfully modified.
|
|
@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LegacyRegion2Unlock (
|
|
IN EFI_LEGACY_REGION2_PROTOCOL *This,
|
|
IN UINT32 Start,
|
|
IN UINT32 Length,
|
|
OUT UINT32 *Granularity
|
|
);
|
|
|
|
/**
|
|
Get region information for the attributes of the Legacy Region.
|
|
|
|
This function is used to discover the granularity of the attributes for the memory in the legacy
|
|
region. Each attribute may have a different granularity and the granularity may not be the same
|
|
for all memory ranges in the legacy region.
|
|
|
|
@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.
|
|
@param DescriptorCount[out] The number of region descriptor entries returned in the Descriptor
|
|
buffer.
|
|
@param Descriptor[out] A pointer to a pointer used to return a buffer where the legacy
|
|
region information is deposited. This buffer will contain a list of
|
|
DescriptorCount number of region descriptors. This function will
|
|
provide the memory for the buffer.
|
|
|
|
@retval EFI_SUCCESS The region's attributes were successfully modified.
|
|
@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LegacyRegionGetInfo (
|
|
IN EFI_LEGACY_REGION2_PROTOCOL *This,
|
|
OUT UINT32 *DescriptorCount,
|
|
OUT EFI_LEGACY_REGION_DESCRIPTOR **Descriptor
|
|
);
|
|
|
|
#endif
|