4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (C) 2012 Oracle Corporation
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * available from http://www.virtualbox.org. This file is free software;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * you can redistribute it and/or modify it under the terms of the GNU
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * General Public License (GPL) as published by the Free Software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The contents of this file may alternatively be used under the terms
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * of the Common Development and Distribution License Version 1.0
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * VirtualBox OSE distribution, in which case the provisions of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CDDL are applicable instead of those of the GPL.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * You may elect to license modified versions of this file under the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * terms and conditions of either the GPL or the CDDL or both.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Memory Detection for Virtual Machines.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync are licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync which accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncModule Name:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync// The package level header files this module uses
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync// The Library classes this module consumes
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // CMOS 0x34/0x35 specifies the system memory above 16 MB.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * CMOS(0x35) is the high byte
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * CMOS(0x34) is the low byte
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * The size is specified in 64kb chunks
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * Since this is memory above 16MB, the 16MB must be added
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // into the calculation to get the total memory size.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // CMOS 0x5b-0x5d specifies the system memory above 4GB MB.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * CMOS(0x5d) is the most significant size byte
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * CMOS(0x5c) is the middle size byte
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * CMOS(0x5b) is the least significant size byte
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // * The size is specified in 64kb chunks
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (CmosIndex = 0x5d; CmosIndex >= 0x5b; CmosIndex--) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Size = (UINT32) (Size << 8) + (UINT32) CmosRead8 (CmosIndex);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Peform Memory Detection
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return EFI_SUCCESS The PEIM initialized successfully.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Determine total memory size available
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Determine the range of memory to use during PEI
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync MemoryBase = PcdGet32 (PcdOvmfMemFvBase) + PcdGet32 (PcdOvmfMemFvSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync MemorySize -= BASE_64KB; /* Reserves 64KB for ACPI tables. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Publish this memory to the PEI Core
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = PublishSystemMemory(MemoryBase, MemorySize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Create memory HOBs
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync MtrrSetMemoryAttribute (BASE_1MB, MemoryBase + MemorySize - BASE_1MB, CacheWriteBack);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync MtrrSetMemoryAttribute (0, BASE_512KB + BASE_128KB, CacheWriteBack);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AddUntestedMemoryBaseSizeHob (BASE_4GB, UpperMemorySize);