VBoxAcpi.cpp revision 616c4e73368513b3c835881ff9f2386083afad01
616c4e73368513b3c835881ff9f2386083afad01vboxsync/* $Id$ */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync/** @file
616c4e73368513b3c835881ff9f2386083afad01vboxsync * VBoxAcpi - VirtualBox ACPI maniputation functionality.
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync/*
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * Copyright (C) 2009 Sun Microsystems, Inc.
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync *
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * available from http://www.virtualbox.org. This file is free software;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * you can redistribute it and/or modify it under the terms of the GNU
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * General Public License (GPL) as published by the Free Software
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync *
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync * additional information or have any questions.
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#if !defined(IN_RING3)
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#error Pure R3 code
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#endif
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <VBox/pdmdev.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <VBox/pgm.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <VBox/log.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <VBox/param.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <iprt/assert.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <iprt/alloc.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#include <iprt/string.h>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#ifdef VBOX_WITH_DYNAMIC_DSDT
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync/* vbox.dsl - input to generate proper DSDT on the fly */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync# include <vboxdsl.hex>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#else
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync/* Statically compiled AML */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync# include <vboxaml.hex>
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#endif
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#ifdef VBOX_WITH_DYNAMIC_DSDT
616c4e73368513b3c835881ff9f2386083afad01vboxsyncstatic int prepareDynamicDsdt(PPDMDEVINS pDevIns,
616c4e73368513b3c835881ff9f2386083afad01vboxsync void* *ppPtr,
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync size_t *puDsdtLen)
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync{
990f120996c99b7f384c0d84f7465cd6f2d77f3dvboxsync //LogRel(("file is %s\n", g_abVboxDslSource));
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync *ppPtr = NULL;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync *puDsdtLen = 0;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync return 0;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync}
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
616c4e73368513b3c835881ff9f2386083afad01vboxsyncstatic int cleanupDynamicDsdt(PPDMDEVINS pDevIns,
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync void* pPtr)
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync{
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync return 0;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync}
ecb074924ed761fe89e91113482db5b7374441b0vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync#else
ecb074924ed761fe89e91113482db5b7374441b0vboxsyncstatic int patchAml(PPDMDEVINS pDevIns, uint8_t* pAml, size_t uAmlLen)
ecb074924ed761fe89e91113482db5b7374441b0vboxsync{
ecb074924ed761fe89e91113482db5b7374441b0vboxsync uint16_t cNumCpus;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync int rc;
616c4e73368513b3c835881ff9f2386083afad01vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync rc = CFGMR3QueryU16Def(pDevIns->pCfgHandle, "NumCPUs", &cNumCpus, 1);
616c4e73368513b3c835881ff9f2386083afad01vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync if (RT_FAILURE(rc))
ecb074924ed761fe89e91113482db5b7374441b0vboxsync return rc;
616c4e73368513b3c835881ff9f2386083afad01vboxsync
616c4e73368513b3c835881ff9f2386083afad01vboxsync /**
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * Now search AML for:
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * AML_PROCESSOR_OP (UINT16) 0x5b83
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * and replace whole block with
616c4e73368513b3c835881ff9f2386083afad01vboxsync * AML_NOOP_OP (UINT16) 0xa3
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * for VCPU not configured
ecb074924ed761fe89e91113482db5b7374441b0vboxsync */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync uint16_t cAcpiCpus = 0;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync for (uint32_t i = 0; i < uAmlLen - 5; i++)
ecb074924ed761fe89e91113482db5b7374441b0vboxsync {
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /*
616c4e73368513b3c835881ff9f2386083afad01vboxsync * AML_PROCESSOR_OP
ecb074924ed761fe89e91113482db5b7374441b0vboxsync *
616c4e73368513b3c835881ff9f2386083afad01vboxsync * DefProcessor := ProcessorOp PkgLength NameString ProcID
ecb074924ed761fe89e91113482db5b7374441b0vboxsync PblkAddr PblkLen ObjectList
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * ProcessorOp := ExtOpPrefix 0x83
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * ProcID := ByteData
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * PblkAddr := DwordData
ecb074924ed761fe89e91113482db5b7374441b0vboxsync * PblkLen := ByteData
ecb074924ed761fe89e91113482db5b7374441b0vboxsync */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync if ((pAml[i] == 0x5b) && (pAml[i+1] == 0x83))
ecb074924ed761fe89e91113482db5b7374441b0vboxsync {
ecb074924ed761fe89e91113482db5b7374441b0vboxsync if ((pAml[i+3] != 'C') || (pAml[i+4] != 'P'))
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /* false alarm, not named starting CP */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync continue;
616c4e73368513b3c835881ff9f2386083afad01vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /* Maybe use ProcID instead? */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync cAcpiCpus++;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync if (cAcpiCpus <= cNumCpus)
ecb074924ed761fe89e91113482db5b7374441b0vboxsync continue;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /* Will fill unwanted CPU block with NOOPs */
616c4e73368513b3c835881ff9f2386083afad01vboxsync /*
616c4e73368513b3c835881ff9f2386083afad01vboxsync * See 18.2.4 Package Length Encoding in ACPI spec
616c4e73368513b3c835881ff9f2386083afad01vboxsync * for full format
ecb074924ed761fe89e91113482db5b7374441b0vboxsync */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync uint32_t cBytes = pAml[i + 2];
616c4e73368513b3c835881ff9f2386083afad01vboxsync AssertReleaseMsg((cBytes >> 6) == 0,
ecb074924ed761fe89e91113482db5b7374441b0vboxsync ("So far, we only understand simple package length"));
616c4e73368513b3c835881ff9f2386083afad01vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /* including AML_PROCESSOR_OP itself */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync for (uint32_t j = 0; j < cBytes + 2; j++)
ecb074924ed761fe89e91113482db5b7374441b0vboxsync pAml[i+j] = 0xa3;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /* Can increase i by cBytes + 1, but not really worth it */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync }
ecb074924ed761fe89e91113482db5b7374441b0vboxsync }
ecb074924ed761fe89e91113482db5b7374441b0vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync /* now recompute checksum, whole file byte sum must be 0 */
ecb074924ed761fe89e91113482db5b7374441b0vboxsync pAml[9] = 0;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync uint8_t aSum = 0;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync for (uint32_t i = 0; i < uAmlLen; i++)
ecb074924ed761fe89e91113482db5b7374441b0vboxsync aSum = aSum + (uint8_t)pAml[i];
ecb074924ed761fe89e91113482db5b7374441b0vboxsync pAml[9] = (uint8_t) (0 - aSum);
616c4e73368513b3c835881ff9f2386083afad01vboxsync
ecb074924ed761fe89e91113482db5b7374441b0vboxsync return 0;
ecb074924ed761fe89e91113482db5b7374441b0vboxsync}
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#endif
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync/* Two only public functions */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsyncint acpiPrepareDsdt(PPDMDEVINS pDevIns, void * *ppPtr, size_t *puDsdtLen)
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync{
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#ifdef VBOX_WITH_DYNAMIC_DSDT
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync return prepareDynamicDsdt(pDevIns, ppPtr, puDsdtLen);
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#else
990f120996c99b7f384c0d84f7465cd6f2d77f3dvboxsync *ppPtr = AmlCode;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync *puDsdtLen = sizeof(AmlCode);
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync return 0;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#endif
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync}
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsyncint acpiCleanupDsdt(PPDMDEVINS pDevIns, void * pPtr)
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync{
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#ifdef VBOX_WITH_DYNAMIC_DSDT
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync return cleanupDynamicDsdt(pDevIns, pPtr);
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#else
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync /* Do nothing */
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync return 0;
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync#endif
7f8a04081173dbe3c72bddd0ffeb237e7f9070b0vboxsync}
616c4e73368513b3c835881ff9f2386083afad01vboxsync