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/*
* Copyright (c) 2010, 2012-2013, 2015-2021 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ARCH_ARM_SYSTEM_HH__
#define __ARCH_ARM_SYSTEM_HH__
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
#include "arch/arm/page_size.hh"
#include "arch/arm/types.hh"
#include "kern/linux/events.hh"
#include "params/ArmSystem.hh"
#include "sim/full_system.hh"
#include "sim/sim_object.hh"
#include "sim/system.hh"
#include "enums/ArmExtension.hh"
namespace gem5
{
class GenericTimer;
class BaseGic;
class FVPBasePwrCtrl;
class ThreadContext;
struct ArmReleaseParams;
class ArmRelease : public SimObject
{
public:
PARAMS(ArmRelease);
ArmRelease(const Params &p);
bool
has(ArmExtension ext) const
{
if (auto it = _extensions.find(ext); it != _extensions.end()) {
return it->second;
} else {
return false;
}
}
protected:
/**
* List of implemented extensions
*/
std::unordered_map<ArmExtension, bool> _extensions;
};
class ArmSystem : public System
{
protected:
/**
* Pointer to the Generic Timer wrapper.
*/
GenericTimer *_genericTimer;
BaseGic *_gic;
/**
* Pointer to the Power Controller (if any)
*/
FVPBasePwrCtrl *_pwrCtrl;
/**
* Reset address (ARMv8)
*/
Addr _resetAddr;
/**
* True if the register width of the highest implemented exception level is
* 64 bits (ARMv8)
*/
bool _highestELIs64;
/**
* Supported physical address range in bits if the highest implemented
* exception level is 64 bits (ARMv8)
*/
const uint8_t _physAddrRange64;
/**
* True if ASID is 16 bits in AArch64 (ARMv8)
*/
const bool _haveLargeAsid64;
/** SVE vector length at reset, in quadwords */
const unsigned _sveVL;
/**
* True if the Semihosting interface is enabled.
*/
ArmSemihosting *const semihosting;
/**
* Arm Release object: contains a list of implemented
* features
*/
const ArmRelease *release;
public:
static constexpr Addr PageBytes = ArmISA::PageBytes;
static constexpr Addr PageShift = ArmISA::PageShift;
PARAMS(ArmSystem);
ArmSystem(const Params &p);
/** true if this a multiprocessor system */
bool multiProc;
const ArmRelease* releaseFS() const { return release; }
bool has(ArmExtension ext) const { return release->has(ext); }
/** Sets the pointer to the Generic Timer. */
void
setGenericTimer(GenericTimer *generic_timer)
{
_genericTimer = generic_timer;
}
/** Sets the pointer to the GIC. */
void setGIC(BaseGic *gic) { _gic = gic; }
/** Sets the pointer to the Power Controller */
void setPowerController(FVPBasePwrCtrl *pwr_ctrl)
{
_pwrCtrl = pwr_ctrl;
}
/** Get a pointer to the system's generic timer model */
GenericTimer *getGenericTimer() const { return _genericTimer; }
/** Get a pointer to the system's GIC */
BaseGic *getGIC() const { return _gic; }
/** Get a pointer to the system's power controller */
FVPBasePwrCtrl *getPowerController() const { return _pwrCtrl; }
/** Returns true if the register width of the highest implemented exception
* level is 64 bits (ARMv8) */
bool highestELIs64() const { return _highestELIs64; }
/** Returns the highest implemented exception level */
ArmISA::ExceptionLevel
highestEL() const
{
if (has(ArmExtension::SECURITY))
return ArmISA::EL3;
if (has(ArmExtension::VIRTUALIZATION))
return ArmISA::EL2;
return ArmISA::EL1;
}
/** Returns the reset address if the highest implemented exception level is
* 64 bits (ARMv8) */
Addr resetAddr() const { return _resetAddr; }
void setResetAddr(Addr addr) { _resetAddr = addr; }
/** Returns true if ASID is 16 bits in AArch64 (ARMv8) */
bool haveLargeAsid64() const { return _haveLargeAsid64; }
/** Returns the SVE vector length at reset, in quadwords */
unsigned sveVL() const { return _sveVL; }
/** Returns the supported physical address range in bits if the highest
* implemented exception level is 64 bits (ARMv8) */
uint8_t physAddrRange64() const { return _physAddrRange64; }
/** Returns the supported physical address range in bits */
uint8_t
physAddrRange() const
{
if (_highestELIs64)
return _physAddrRange64;
if (has(ArmExtension::LPAE))
return 40;
return 32;
}
/** Returns the physical address mask */
Addr physAddrMask() const { return mask(physAddrRange()); }
/** Is Arm Semihosting support enabled? */
bool haveSemihosting() const { return semihosting != nullptr; }
/**
* Returns a valid ArmSystem pointer if using ARM ISA, it fails
* otherwise.
*/
static ArmSystem*
getArmSystem(ThreadContext *tc)
{
assert(FullSystem);
return static_cast<ArmSystem *>(tc->getSystemPtr());
}
static bool has(ArmExtension ext, ThreadContext *tc);
static bool highestELIs64(ThreadContext *tc);
/** Returns the highest implemented exception level for the system of a
* specific thread context
*/
static ArmISA::ExceptionLevel highestEL(ThreadContext *tc);
/** Return true if the system implements a specific exception level */
static bool haveEL(ThreadContext *tc, ArmISA::ExceptionLevel el);
/** Returns the reset address if the highest implemented exception level
* for the system of a specific thread context is 64 bits (ARMv8)
*/
static Addr resetAddr(ThreadContext *tc);
/** Returns the supported physical address range in bits for the system of a
* specific thread context
*/
static uint8_t physAddrRange(ThreadContext *tc);
/** Returns the physical address mask for the system of a specific thread
* context
*/
static Addr physAddrMask(ThreadContext *tc);
/** Returns true if ASID is 16 bits for the system of a specific thread
* context while in AArch64 (ARMv8) */
static bool haveLargeAsid64(ThreadContext *tc);
/** Is Arm Semihosting support enabled? */
static bool haveSemihosting(ThreadContext *tc);
/** Make a Semihosting call from aarch64 */
static bool callSemihosting64(ThreadContext *tc, bool gem5_ops=false);
/** Make a Semihosting call from aarch32 */
static bool callSemihosting32(ThreadContext *tc, bool gem5_ops=false);
/** Make a Semihosting call from either aarch64 or aarch32 */
static bool callSemihosting(ThreadContext *tc, bool gem5_ops=false);
/** Make a call to notify the power controller of STANDBYWFI assertion */
static void callSetStandByWfi(ThreadContext *tc);
/** Make a call to notify the power controller of STANDBYWFI deassertion */
static void callClearStandByWfi(ThreadContext *tc);
/**
* Notify the power controller of WAKEREQUEST assertion. Returns true
* if WAKEREQUEST is enabled as a power-on mechanism, and the core is now
* powered, false otherwise
*/
static bool callSetWakeRequest(ThreadContext *tc);
/** Notify the power controller of WAKEREQUEST deassertion */
static void callClearWakeRequest(ThreadContext *tc);
};
} // namespace gem5
#endif