src/arch/arm/system.hh - public/gem5 - Git at Google

 /*
  * 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 "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
	/*
	* 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 "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