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//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2012, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
//*************************************************************************
// $Header: /Alaska/BIN/Chipset/Intel/NorthBridge/Haswell/Intel SystemAgent NB Chipset/SystemAgentWrap/LegacyRegion2/LegacyRegion2.c 1 4/05/12 3:08a Yurenlai $
//
// $Date: 4/05/12 3:08a $
//*************************************************************************
// Revision History
// ----------------
// $Log:
//
//*************************************************************************
//<AMI_FHDR_START>
//
// Name: LegacyRegion2.c
//
// Description: Legacy Region 2 functions implementation
//
//<AMI_FHDR_END>
//*************************************************************************
#include <efi.h>
#include <AmiDxeLib.h>
#include <AmiCspLib.h>
#include <Protocol\LegacyRegion.h>
#include <Protocol\LegacyRegion2.h>
EFI_LEGACY_REGION_PROTOCOL *gLegacyRegionProtocol = NULL;
//*************************************************************************
//<AMI_PHDR_START>
//
// Procedure: LegacyRegionDecode
//
// Description: Program chipset to allow decoding of 0xc0000 - 0xfffff.
//
// Input:
// IN EFI_LEGACY_REGION_PROTOCOL *This,
// IN UINT32 Start,
// IN UINT32 Length,
// OUT UINT32 *Granularity,
// IN BOOLEAN *On
//
// Output:
// Status of the operation
//
//<AMI_PHDR_END>
//*************************************************************************
EFI_STATUS LegacyRegionDecode(
IN EFI_LEGACY_REGION2_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity,
IN BOOLEAN *On
)
{
return gLegacyRegionProtocol->Decode( gLegacyRegionProtocol, Start, Length, On);
}
//*************************************************************************
//<AMI_PHDR_START>
//
// Procedure: LegacyRegionLock
//
// Description: To disallow writes to memory 0xc0000 - 0xfffff.
//
// Input:
// IN EFI_LEGACY_REGION_PROTOCOL *This,
// IN UINT32 Start,
// IN UINT32 Length,
// OUT UINT32 *Granularity OPTIONAL
//
// Output:
// Status of the operation
//
//<AMI_PHDR_END>
//*************************************************************************
EFI_STATUS LegacyRegionLock(
IN EFI_LEGACY_REGION2_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity OPTIONAL
)
{
return gLegacyRegionProtocol->Lock( gLegacyRegionProtocol, Start, Length, Granularity);
}
//*************************************************************************
//<AMI_PHDR_START>
//
// Procedure: LegacyRegionBootLock
//
// Description: To permanently disallow writes to memory 0xc0000 - 0xffff.
//
// Input:
// IN EFI_LEGACY_REGION_PROTOCOL *This,
// IN UINT32 Start,
// IN UINT32 Length,
// OUT UINT32 *Granularity OPTIONAL
//
// Output:
// Status of the operation
//
//<AMI_PHDR_END>
//*************************************************************************
EFI_STATUS LegacyRegionBootLock(
IN EFI_LEGACY_REGION2_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity OPTIONAL
)
{
return gLegacyRegionProtocol->BootLock( gLegacyRegionProtocol, Start, Length, Granularity);
}
//*************************************************************************
//<AMI_PHDR_START>
//
// Procedure: LegacyRegionUnlock
//
// Description: To allow read/write of memory 0xc0000-0xfffff.
//
// Input:
// IN EFI_LEGACY_REGION_PROTOCOL *This,
// IN UINT32 Start,
// IN UINT32 Length,
// OUT UINT32 *Granularity OPTIONAL
//
// Output:
// Status of the operation
//
//<AMI_PHDR_END>
//*************************************************************************
EFI_STATUS LegacyRegionUnlock(
IN EFI_LEGACY_REGION2_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity OPTIONAL
)
{
return gLegacyRegionProtocol->UnLock(gLegacyRegionProtocol, Start, Length, Granularity);
}
//*************************************************************************
//<AMI_PHDR_START>
//
// Procedure: GetLegacyRegionInfo
//
// Description:
// 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.
//
// Input:
// IN EFI_LEGACY_REGION_PROTOCOL *This
// -- Indicates the EFI_LEGACY_REGION_PROTOCOL instance.
//
// Output:
// EFI_UNSUPPORTED - This function is not supported
// EFI_SUCCESS - The following information structure is returned:
// OUT UINT32 *DescriptorCount
// -- The number of region descriptor entries returned in the Descriptor
// buffer. See EFI_LEGACY_REGION_DESCRIPTOR definition for reference.
// OUT EFI_LEGACY_REGION_DESCRIPTOR **Descriptor
// -- 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.
//
//<AMI_PHDR_END>
//*************************************************************************
EFI_STATUS GetLegacyRegionInfo(
IN EFI_LEGACY_REGION2_PROTOCOL *This,
OUT UINT32 *DescriptorCount,
OUT EFI_LEGACY_REGION_DESCRIPTOR **Descriptor
)
{
return EFI_UNSUPPORTED; // Note: to support this function there is a need
// to update NB template.
}
EFI_LEGACY_REGION2_PROTOCOL gLegacyRegion2Protocol =
{
LegacyRegionDecode, LegacyRegionLock,
LegacyRegionBootLock, LegacyRegionUnlock,
GetLegacyRegionInfo
};
//*************************************************************************
//<AMI_PHDR_START>
//
// Procedure: InitializeLegacyRegion2
//
// Description: Install the legacy region 2 protocol.
//
// Input:
// IN EFI_HANDLE ImageHandle,
// IN EFI_SYSTEM_TABLE *SystemTable
//
// Output:
// Status of the operation
//
// Notes:
// Here is the control flow of this function:
// 1. Get root bridge io protocol.
// 2. Install legacy region protocol.
//
//<AMI_PHDR_END>
//*************************************************************************
EFI_STATUS InitializeLegacyRegion2(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
InitAmiLib(ImageHandle, SystemTable);
Status = pBS->LocateProtocol(
&gEfiLegacyRegionProtocolGuid,
NULL,
&gLegacyRegionProtocol);
if(!EFI_ERROR(Status)) {
Status = pBS->InstallProtocolInterface (
&ImageHandle,
&gEfiLegacyRegion2ProtocolGuid,
EFI_NATIVE_INTERFACE,
&gLegacyRegion2Protocol
);
}
return Status;
}
//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2012, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
|
