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

 /*
  * Copyright (c) 2010, 2012-2013, 2015-2020 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 <vector>

 #include "kern/linux/events.hh"
 #include "params/ArmSystem.hh"
 #include "sim/full_system.hh"
 #include "sim/sim_object.hh"
 #include "sim/system.hh"

 class GenericTimer;
 class BaseGic;
 class FVPBasePwrCtrl;
 class ThreadContext;

 class ArmSystem : public System
 {
   protected:
     /**
      * True if this system implements the Security Extensions
      */
     const bool _haveSecurity;

     /**
      * True if this system implements the Large Physical Address Extension
      */
     const bool _haveLPAE;

     /**
      * True if this system implements the virtualization Extensions
      */
     const bool _haveVirtualization;

     /**
      * True if this system implements the Crypto Extension
      */
     const bool _haveCrypto;

     /**
      * 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;

     /**
      * True if SVE is implemented (ARMv8)
      */
     const bool _haveSVE;

     /** SVE vector length at reset, in quadwords */
     const unsigned _sveVL;

     /**
      * True if LSE is implemented (ARMv8.1)
      */
     const bool _haveLSE;

     /** True if Priviledge Access Never is implemented */
     const unsigned _havePAN;

     /** True if Secure EL2 is implemented */
     const unsigned _haveSecEL2;

     /**
      * True if the Semihosting interface is enabled.
      */
     ArmSemihosting *const semihosting;

   public:
     typedef ArmSystemParams Params;
     const Params *
     params() const
     {
         return dynamic_cast<const Params *>(_params);
     }

     ArmSystem(Params *p);

     /** true if this a multiprocessor system */
     bool multiProc;

     /** Returns true if this system implements the Security Extensions */
     bool haveSecurity() const { return _haveSecurity; }

     /** Returns true if this system implements the Large Physical Address
      * Extension */
     bool haveLPAE() const { return _haveLPAE; }

     /** Returns true if this system implements the virtualization
       * Extensions
       */
     bool haveVirtualization() const { return _haveVirtualization; }

     /** Returns true if this system implements the Crypto
       * Extension
       */
     bool haveCrypto() const { return _haveCrypto; }

     /** 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 */
     ExceptionLevel
     highestEL() const
     {
         if (_haveSecurity)
             return EL3;
         if (_haveVirtualization)
             return EL2;
         return 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 true if SVE is implemented (ARMv8) */
     bool haveSVE() const { return _haveSVE; }

     /** Returns the SVE vector length at reset, in quadwords */
     unsigned sveVL() const { return _sveVL; }

     /** Returns true if LSE is implemented (ARMv8.1) */
     bool haveLSE() const { return _haveLSE; }

     /** Returns true if Priviledge Access Never is implemented */
     bool havePAN() const { return _havePAN; }

     /** Returns true if Priviledge Access Never is implemented */
     bool haveSecEL2() const { return _haveSecEL2; }

     /** 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 (_haveLPAE)
             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());
     }

     /** Returns true if the system of a specific thread context implements the
      * Security Extensions
      */
     static bool haveSecurity(ThreadContext *tc);

     /** Returns true if the system of a specific thread context implements the
      * virtualization Extensions
      */
     static bool haveVirtualization(ThreadContext *tc);

     /** Returns true if the system of a specific thread context implements the
      * Large Physical Address Extension
      */
     static bool haveLPAE(ThreadContext *tc);

     /** Returns true if the register width of the highest implemented exception
      * level for the system of a specific thread context is 64 bits (ARMv8)
      */
     static bool highestELIs64(ThreadContext *tc);

     /** Returns the highest implemented exception level for the system of a
      * specific thread context
      */
     static ExceptionLevel highestEL(ThreadContext *tc);

     /** Return true if the system implements a specific exception level */
     static bool haveEL(ThreadContext *tc, 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);
 };

 #endif
	/*
	* Copyright (c) 2010, 2012-2013, 2015-2020 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 <vector>

	#include "kern/linux/events.hh"
	#include "params/ArmSystem.hh"
	#include "sim/full_system.hh"
	#include "sim/sim_object.hh"
	#include "sim/system.hh"

	class GenericTimer;
	class BaseGic;
	class FVPBasePwrCtrl;
	class ThreadContext;

	class ArmSystem : public System
	{
	protected:
	/**
	* True if this system implements the Security Extensions
	*/
	const bool _haveSecurity;

	/**
	* True if this system implements the Large Physical Address Extension
	*/
	const bool _haveLPAE;

	/**
	* True if this system implements the virtualization Extensions
	*/
	const bool _haveVirtualization;

	/**
	* True if this system implements the Crypto Extension
	*/
	const bool _haveCrypto;

	/**
	* 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;

	/**
	* True if SVE is implemented (ARMv8)
	*/
	const bool _haveSVE;

	/** SVE vector length at reset, in quadwords */
	const unsigned _sveVL;

	/**
	* True if LSE is implemented (ARMv8.1)
	*/
	const bool _haveLSE;

	/** True if Priviledge Access Never is implemented */
	const unsigned _havePAN;

	/** True if Secure EL2 is implemented */
	const unsigned _haveSecEL2;

	/**
	* True if the Semihosting interface is enabled.
	*/
	ArmSemihosting *const semihosting;

	public:
	typedef ArmSystemParams Params;
	const Params *
	params() const
	{
	return dynamic_cast<const Params *>(_params);
	}

	ArmSystem(Params *p);

	/** true if this a multiprocessor system */
	bool multiProc;

	/** Returns true if this system implements the Security Extensions */
	bool haveSecurity() const { return _haveSecurity; }

	/** Returns true if this system implements the Large Physical Address
	* Extension */
	bool haveLPAE() const { return _haveLPAE; }

	/** Returns true if this system implements the virtualization
	* Extensions
	*/
	bool haveVirtualization() const { return _haveVirtualization; }

	/** Returns true if this system implements the Crypto
	* Extension
	*/
	bool haveCrypto() const { return _haveCrypto; }

	/** 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 */
	ExceptionLevel
	highestEL() const
	{
	if (_haveSecurity)
	return EL3;
	if (_haveVirtualization)
	return EL2;
	return 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 true if SVE is implemented (ARMv8) */
	bool haveSVE() const { return _haveSVE; }

	/** Returns the SVE vector length at reset, in quadwords */
	unsigned sveVL() const { return _sveVL; }

	/** Returns true if LSE is implemented (ARMv8.1) */
	bool haveLSE() const { return _haveLSE; }

	/** Returns true if Priviledge Access Never is implemented */
	bool havePAN() const { return _havePAN; }

	/** Returns true if Priviledge Access Never is implemented */
	bool haveSecEL2() const { return _haveSecEL2; }

	/** 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 (_haveLPAE)
	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());
	}

	/** Returns true if the system of a specific thread context implements the
	* Security Extensions
	*/
	static bool haveSecurity(ThreadContext *tc);

	/** Returns true if the system of a specific thread context implements the
	* virtualization Extensions
	*/
	static bool haveVirtualization(ThreadContext *tc);

	/** Returns true if the system of a specific thread context implements the
	* Large Physical Address Extension
	*/
	static bool haveLPAE(ThreadContext *tc);

	/** Returns true if the register width of the highest implemented exception
	* level for the system of a specific thread context is 64 bits (ARMv8)
	*/
	static bool highestELIs64(ThreadContext *tc);

	/** Returns the highest implemented exception level for the system of a
	* specific thread context
	*/
	static ExceptionLevel highestEL(ThreadContext *tc);

	/** Return true if the system implements a specific exception level */
	static bool haveEL(ThreadContext *tc, 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);
	};

	#endif