Upload BSD-licensed Vlv2TbltDevicePkg and Vlv2DeviceRefCodePkg to
https://svn.code.sf.net/p/edk2/code/trunk/edk2/, which are for MinnowBoard MAX open source project. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: David Wei <david.wei@intel.com> Reviewed-by: Mike Wu <mike.wu@intel.com> Reviewed-by: Hot Tian <hot.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16599 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
David Wei
zwei4
324
Vlv2TbltDevicePkg/PlatformInitPei/Dimm.c
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324
Vlv2TbltDevicePkg/PlatformInitPei/Dimm.c
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/** @file
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Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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Dimm.c
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Abstract:
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PPI for reading SPD modules on DIMMs.
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--*/
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//
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// Header Files
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//
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#include "Platformearlyinit.h"
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#define DIMM_SOCKETS 4 // Total number of DIMM sockets allowed on
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// the platform
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#define DIMM_SEGMENTS 1 // Total number of Segments Per DIMM.
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#define MEMORY_CHANNELS 2 // Total number of memory channels
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// populated on the system board
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//
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// Prototypes
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//
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EFI_STATUS
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EFIAPI
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GetDimmState (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_PLATFORM_DIMM_PPI *This,
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IN UINT8 Dimm,
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OUT PEI_PLATFORM_DIMM_STATE *State
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);
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EFI_STATUS
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EFIAPI
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SetDimmState (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_PLATFORM_DIMM_PPI *This,
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IN UINT8 Dimm,
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IN PEI_PLATFORM_DIMM_STATE *State
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);
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EFI_STATUS
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EFIAPI
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ReadSpd (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_PLATFORM_DIMM_PPI *This,
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IN UINT8 Dimm,
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IN UINT8 Offset,
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IN UINTN Count,
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IN OUT UINT8 *Buffer
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);
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static PEI_PLATFORM_DIMM_PPI mGchDimmPpi = {
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DIMM_SOCKETS,
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DIMM_SEGMENTS,
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MEMORY_CHANNELS,
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GetDimmState,
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SetDimmState,
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ReadSpd
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};
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static EFI_PEI_PPI_DESCRIPTOR mPpiPlatformDimm = {
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(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
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&gPeiPlatformDimmPpiGuid,
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&mGchDimmPpi
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};
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//
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// Functions
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//
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/**
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This function returns the current state of a single DIMM. Present indicates
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that the DIMM slot is physically populated. Disabled indicates that the DIMM
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should not be used.
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@param PeiServices PEI services table pointer
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@param This PPI pointer
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@param Dimm DIMM to read from
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@param State Pointer to a return buffer to be updated with the current state
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of the DIMM
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@retval EFI_SUCCESS The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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GetDimmState (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_PLATFORM_DIMM_PPI *This,
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IN UINT8 Dimm,
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OUT PEI_PLATFORM_DIMM_STATE *State
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)
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{
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EFI_STATUS Status;
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UINT8 Buffer;
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PEI_ASSERT (PeiServices, (Dimm < This->DimmSockets));
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//
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// A failure here does not necessarily mean that no DIMM is present.
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// Read a single byte. All we care about is the return status.
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//
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Status = ReadSpd (
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PeiServices,
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This,
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Dimm,
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0,
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1,
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&Buffer
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);
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if (EFI_ERROR (Status)) {
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State->Present = 0;
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} else {
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State->Present = 1;
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}
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//
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// BUGBUG: Update to check platform variable when it is available
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//
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State->Disabled = 0;
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State->Reserved = 0;
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return EFI_SUCCESS;
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}
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/**
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This function updates the state of a single DIMM.
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@param PeiServices PEI services table pointer
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@param This PPI pointer
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@param Dimm DIMM to set state for
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@param State Pointer to the state information to set.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_UNSUPPORTED The function is not supported.
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**/
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EFI_STATUS
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EFIAPI
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SetDimmState (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_PLATFORM_DIMM_PPI *This,
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IN UINT8 Dimm,
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IN PEI_PLATFORM_DIMM_STATE *State
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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This function reads SPD information from a DIMM.
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PeiServices PEI services table pointer
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This PPI pointer
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Dimm DIMM to read from
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Offset Offset in DIMM
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Count Number of bytes
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Buffer Return buffer
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@param EFI_SUCCESS The function completed successfully.
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@param EFI_DEVICE_ERROR The DIMM being accessed reported a device error,
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does not have an SPD module, or is not installed in
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the system.
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@retval EFI_TIMEOUT Time out trying to read the SPD module.
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@retval EFI_INVALID_PARAMETER A parameter was outside the legal limits.
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**/
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EFI_STATUS
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EFIAPI
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ReadSpd (
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_PLATFORM_DIMM_PPI *This,
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IN UINT8 Dimm,
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IN UINT8 Offset,
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IN UINTN Count,
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IN OUT UINT8 *Buffer
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)
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{
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EFI_STATUS Status;
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PEI_SMBUS_PPI *Smbus;
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UINTN Index;
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UINTN Index1;
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EFI_SMBUS_DEVICE_ADDRESS SlaveAddress;
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EFI_SMBUS_DEVICE_COMMAND Command;
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UINTN Length;
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Status = (**PeiServices).LocatePpi (
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PeiServices,
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&gPeiSmbusPpiGuid, // GUID
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0, // INSTANCE
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NULL, // EFI_PEI_PPI_DESCRIPTOR
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&Smbus // PPI
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);
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ASSERT_PEI_ERROR (PeiServices, Status);
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switch (Dimm) {
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case 0:
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SlaveAddress.SmbusDeviceAddress = SMBUS_ADDR_CH_A_1 >> 1;
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break;
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case 1:
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SlaveAddress.SmbusDeviceAddress = SMBUS_ADDR_CH_A_2 >> 1;
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break;
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case 2:
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SlaveAddress.SmbusDeviceAddress = SMBUS_ADDR_CH_B_1 >> 1;
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break;
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case 3:
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SlaveAddress.SmbusDeviceAddress = SMBUS_ADDR_CH_B_2 >> 1;
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break;
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default:
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return EFI_INVALID_PARAMETER;
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}
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Index = Count % 4;
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if (Index != 0) {
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//
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// read the first serveral bytes to speed up following reading
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//
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for (Index1 = 0; Index1 < Index; Index1++) {
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Length = 1;
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Command = Offset + Index1;
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Status = Smbus->Execute (
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PeiServices,
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Smbus,
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SlaveAddress,
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Command,
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EfiSmbusReadByte,
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FALSE,
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&Length,
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&Buffer[Index1]
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);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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}
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}
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//
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// Now collect all the remaining bytes on 4 bytes block
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//
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for (; Index < Count; Index += 2) {
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Command = Index + Offset;
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Length = 2;
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Status = Smbus->Execute (
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PeiServices,
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Smbus,
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SlaveAddress,
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Command,
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EfiSmbusReadWord,
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FALSE,
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&Length,
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&Buffer[Index]
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);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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Index += 2;
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Command = Index + Offset;
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Length = 2;
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Status = Smbus->Execute (
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PeiServices,
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Smbus,
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SlaveAddress,
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Command,
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EfiSmbusReadWord,
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FALSE,
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&Length,
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&Buffer[Index]
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);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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}
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return EFI_SUCCESS;
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}
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/**
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This function initializes the PEIM. It simply installs the DIMM PPI.
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@param FfsHeader Not used by this function
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@param PeiServices Pointer to PEI services table
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@retval EFI_SUCCESS The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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PeimInitializeDimm (
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
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IN VOID *SmbusPpi
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)
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{
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EFI_STATUS Status;
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