diff options
Diffstat (limited to 'Chipset/NB/SystemAgentWrap/LegacyRegion2/LegacyRegion2.c')
| -rw-r--r-- | Chipset/NB/SystemAgentWrap/LegacyRegion2/LegacyRegion2.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/Chipset/NB/SystemAgentWrap/LegacyRegion2/LegacyRegion2.c b/Chipset/NB/SystemAgentWrap/LegacyRegion2/LegacyRegion2.c new file mode 100644 index 0000000..3a5a8b4 --- /dev/null +++ b/Chipset/NB/SystemAgentWrap/LegacyRegion2/LegacyRegion2.c @@ -0,0 +1,263 @@ +//************************************************************************* +//************************************************************************* +//** ** +//** (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 ** +//** ** +//************************************************************************* +//************************************************************************* |