VBoxAcpi.cpp revision f998395fdb2412040bc4d458e2b87e899c0cd3eb
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * VBoxAcpi - VirtualBox ACPI maniputation functionality.
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * Copyright (C) 2009 Sun Microsystems, Inc.
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * This file is part of VirtualBox Open Source Edition (OSE), as
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * available from http://www.virtualbox.org. This file is free software;
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * you can redistribute it and/or modify it under the terms of the GNU
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * General Public License (GPL) as published by the Free Software
0662ed52e814f8f08ef0e09956413a792584eddffuankg * Foundation, in version 2 as it comes in the "COPYING" file of the
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * Clara, CA 95054 USA or visit http://www.sun.com if you need
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * additional information or have any questions.
96e08422d46465ebd7105bf48e475f77e60250d7wrowe#if !defined(IN_RING3)
96e08422d46465ebd7105bf48e475f77e60250d7wrowe/* vbox.dsl - input to generate proper DSDT on the fly */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe/* Statically compiled AML */
96e08422d46465ebd7105bf48e475f77e60250d7wrowestatic int patchAml(PPDMDEVINS pDevIns, uint8_t* pAml, size_t uAmlLen)
96e08422d46465ebd7105bf48e475f77e60250d7wrowe rc = CFGMR3QueryU16Def(pDevIns->pCfgHandle, "NumCPUs", &cNumCpus, 1);
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* Clear CPU objects at all, if needed */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe rc = CFGMR3QueryBoolDef(pDevIns->pCfgHandle, "ShowCpu", &fShowCpu, false);
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * Now search AML for:
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * AML_PROCESSOR_OP (UINT16) 0x5b83
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * and replace whole block with
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * AML_NOOP_OP (UINT16) 0xa3
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * for VCPU not configured
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * AML_PROCESSOR_OP
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * DefProcessor := ProcessorOp PkgLength NameString ProcID
96e08422d46465ebd7105bf48e475f77e60250d7wrowe PblkAddr PblkLen ObjectList
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * ProcessorOp := ExtOpPrefix 0x83
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * ProcID := ByteData
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * PblkAddr := DwordData
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * PblkLen := ByteData
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* false alarm, not named starting CP */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* Processor ID */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* Will fill unwanted CPU block with NOOPs */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * See 18.2.4 Package Length Encoding in ACPI spec
96e08422d46465ebd7105bf48e475f77e60250d7wrowe * for full format
96e08422d46465ebd7105bf48e475f77e60250d7wrowe ("So far, we only understand simple package length"));
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* including AML_PROCESSOR_OP itself */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* Can increase i by cBytes + 1, but not really worth it */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* now recompute checksum, whole file byte sum must be 0 */
96e08422d46465ebd7105bf48e475f77e60250d7wrowe/* Two only public functions */
0662ed52e814f8f08ef0e09956413a792584eddffuankgint acpiPrepareDsdt(PPDMDEVINS pDevIns, void * *ppPtr, size_t *puDsdtLen)
96e08422d46465ebd7105bf48e475f77e60250d7wrowe /* Do nothing */