PDMAll.cpp revision 7521bd76d764c3c9534c162e2a37fefb446f2071
/* $Id$ */
/** @file
* PDM Critical Sections
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_PDM
#include "PDMInternal.h"
#include <VBox/pdm.h>
#include <VBox/mm.h>
#include <VBox/vm.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <iprt/asm.h>
#include <iprt/assert.h>
/**
* Gets the pending interrupt.
*
* @returns VBox status code.
* @param pVM VM handle.
* @param pu8Interrupt Where to store the interrupt on success.
*/
PDMDECL(int) PDMGetInterrupt(PVM pVM, uint8_t *pu8Interrupt)
{
pdmLock(pVM);
/*
* The local APIC has a higer priority than the PIC.
*/
if (VM_FF_ISSET(pVM, VM_FF_INTERRUPT_APIC))
{
VM_FF_CLEAR(pVM, VM_FF_INTERRUPT_APIC);
Assert(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnGetInterrupt));
int i = pVM->pdm.s.Apic.CTX_SUFF(pfnGetInterrupt)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
AssertMsg(i <= 255 && i >= 0, ("i=%d\n", i));
if (i >= 0)
{
pdmUnlock(pVM);
*pu8Interrupt = (uint8_t)i;
return VINF_SUCCESS;
}
}
/*
* Check the PIC.
*/
if (VM_FF_ISSET(pVM, VM_FF_INTERRUPT_PIC))
{
VM_FF_CLEAR(pVM, VM_FF_INTERRUPT_PIC);
Assert(pVM->pdm.s.Pic.CTXALLSUFF(pDevIns));
Assert(pVM->pdm.s.Pic.CTXALLSUFF(pfnGetInterrupt));
int i = pVM->pdm.s.Pic.CTXALLSUFF(pfnGetInterrupt)(pVM->pdm.s.Pic.CTXALLSUFF(pDevIns));
AssertMsg(i <= 255 && i >= 0, ("i=%d\n", i));
if (i >= 0)
{
pdmUnlock(pVM);
*pu8Interrupt = (uint8_t)i;
return VINF_SUCCESS;
}
}
/** @todo Figure out exactly why we can get here without anything being set. (REM) */
pdmUnlock(pVM);
return VERR_NO_DATA;
}
/**
* Sets the pending interrupt.
*
* @returns VBox status code.
* @param pVM VM handle.
* @param u8Irq The IRQ line.
* @param u8Level The new level.
*/
PDMDECL(int) PDMIsaSetIrq(PVM pVM, uint8_t u8Irq, uint8_t u8Level)
{
pdmLock(pVM);
int rc = VERR_PDM_NO_PIC_INSTANCE;
if (pVM->pdm.s.Pic.CTXALLSUFF(pDevIns))
{
Assert(pVM->pdm.s.Pic.CTXALLSUFF(pfnSetIrq));
pVM->pdm.s.Pic.CTXALLSUFF(pfnSetIrq)(pVM->pdm.s.Pic.CTXALLSUFF(pDevIns), u8Irq, u8Level);
rc = VINF_SUCCESS;
}
if (pVM->pdm.s.IoApic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq));
pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq)(pVM->pdm.s.IoApic.CTX_SUFF(pDevIns), u8Irq, u8Level);
rc = VINF_SUCCESS;
}
pdmUnlock(pVM);
return rc;
}
/**
* Sets the pending I/O APIC interrupt.
*
* @returns VBox status code.
* @param pVM VM handle.
* @param u8Irq The IRQ line.
* @param u8Level The new level.
*/
PDMDECL(int) PDMIoApicSetIrq(PVM pVM, uint8_t u8Irq, uint8_t u8Level)
{
if (pVM->pdm.s.IoApic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq));
pdmLock(pVM);
pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq)(pVM->pdm.s.IoApic.CTX_SUFF(pDevIns), u8Irq, u8Level);
pdmUnlock(pVM);
return VINF_SUCCESS;
}
return VERR_PDM_NO_PIC_INSTANCE;
}
/**
* Set the APIC base.
*
* @returns VBox status code.
* @param pVM VM handle.
* @param u64Base The new base.
*/
PDMDECL(int) PDMApicSetBase(PVM pVM, uint64_t u64Base)
{
if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnSetBase));
pdmLock(pVM);
pVM->pdm.s.Apic.CTX_SUFF(pfnSetBase)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns), u64Base);
pdmUnlock(pVM);
return VINF_SUCCESS;
}
return VERR_PDM_NO_APIC_INSTANCE;
}
/**
* Get the APIC base.
*
* @returns VBox status code.
* @param pVM VM handle.
* @param pu64Base Where to store the APIC base.
*/
PDMDECL(int) PDMApicGetBase(PVM pVM, uint64_t *pu64Base)
{
if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnGetBase));
pdmLock(pVM);
*pu64Base = pVM->pdm.s.Apic.CTX_SUFF(pfnGetBase)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
pdmUnlock(pVM);
return VINF_SUCCESS;
}
*pu64Base = 0;
return VERR_PDM_NO_APIC_INSTANCE;
}
/**
* Check if the APIC has a pending interrupt/if a TPR change would active one.
*
* @returns VINF_SUCCESS or VERR_PDM_NO_APIC_INSTANCE.
* @param pDevIns Device instance of the APIC.
* @param pfPending Pending state (out).
*/
PDMDECL(int) PDMApicHasPendingIrq(PVM pVM, bool *pfPending)
{
if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnSetTPR));
pdmLock(pVM);
*pfPending = pVM->pdm.s.Apic.CTX_SUFF(pfnHasPendingIrq)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
pdmUnlock(pVM);
return VINF_SUCCESS;
}
return VERR_PDM_NO_APIC_INSTANCE;
}
/**
* Set the TPR (task priority register?).
*
* @returns VBox status code.
* @param pVM VM handle.
* @param u8TPR The new TPR.
*/
PDMDECL(int) PDMApicSetTPR(PVM pVM, uint8_t u8TPR)
{
if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnSetTPR));
pdmLock(pVM);
pVM->pdm.s.Apic.CTX_SUFF(pfnSetTPR)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns), u8TPR);
pdmUnlock(pVM);
return VINF_SUCCESS;
}
return VERR_PDM_NO_APIC_INSTANCE;
}
/**
* Get the TPR (task priority register).
*
* @returns The current TPR.
* @param pVM VM handle.
* @param pu8TPR Where to store the TRP.
* @param pfPending Pending interrupt state (out).
*/
PDMDECL(int) PDMApicGetTPR(PVM pVM, uint8_t *pu8TPR, bool *pfPending)
{
if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
{
Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnGetTPR));
pdmLock(pVM);
*pu8TPR = pVM->pdm.s.Apic.CTX_SUFF(pfnGetTPR)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
if (pfPending)
*pfPending = pVM->pdm.s.Apic.CTX_SUFF(pfnHasPendingIrq)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
pdmUnlock(pVM);
return VINF_SUCCESS;
}
*pu8TPR = 0;
return VERR_PDM_NO_APIC_INSTANCE;
}
/**
* Locks PDM.
* This might call back to Ring-3 in order to deal with lock contention in GC and R3.
*
* @param pVM The VM handle.
*/
void pdmLock(PVM pVM)
{
#ifdef IN_RING3
int rc = PDMCritSectEnter(&pVM->pdm.s.CritSect, VERR_INTERNAL_ERROR);
#else
int rc = PDMCritSectEnter(&pVM->pdm.s.CritSect, VERR_GENERAL_FAILURE);
if (rc == VERR_GENERAL_FAILURE)
{
# ifdef IN_GC
rc = VMMGCCallHost(pVM, VMMCALLHOST_PDM_LOCK, 0);
# else
rc = VMMR0CallHost(pVM, VMMCALLHOST_PDM_LOCK, 0);
# endif
}
#endif
AssertRC(rc);
}
/**
* Locks PDM but don't go to ring-3 if it's owned by someone.
*
* @returns VINF_SUCCESS on success.
* @returns rc if we're in GC or R0 and can't get the lock.
* @param pVM The VM handle.
* @param rc The RC to return in GC or R0 when we can't get the lock.
*/
int pdmLockEx(PVM pVM, int rc)
{
return PDMCritSectEnter(&pVM->pdm.s.CritSect, rc);
}
/**
* Unlocks PDM.
*
* @param pVM The VM handle.
*/
void pdmUnlock(PVM pVM)
{
PDMCritSectLeave(&pVM->pdm.s.CritSect);
}