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

 /*
  * Copyright (c) 2010, 2012-2013, 2015-2018 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.
  *
  * Authors: Ali Saidi
  */

 #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 "params/GenericArmSystem.hh"
 #include "sim/sim_object.hh"
 #include "sim/system.hh"

 class GenericTimer;
 class ThreadContext;

 class ArmSystem : public System
 {
   protected:
     /**
      * PC based event to skip the dprink() call and emulate its
      * functionality
      */
     Linux::DebugPrintkEvent *debugPrintkEvent;

     /** Bootloaders */
     std::vector<std::unique_ptr<ObjectFile>> bootLoaders;

     /**
      * Pointer to the bootloader object
      */
     ObjectFile *bootldr;

     /**
      * 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;

     /**
      * Pointer to the Generic Timer wrapper.
      */
     GenericTimer *_genericTimer;

     /**
      * True if the register width of the highest implemented exception level is
      * 64 bits (ARMv8)
      */
     bool _highestELIs64;

     /**
      * Reset address if the highest implemented exception level is 64 bits
      * (ARMv8)
      */
     const Addr _resetAddr64;

     /**
      * 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;

     /**
      * Range for memory-mapped m5 pseudo ops. The range will be
      * invalid/empty if disabled.
      */
     const AddrRange _m5opRange;

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

   protected:
     /**
      * Get a boot loader that matches the kernel.
      *
      * @param obj Kernel binary
      * @return Pointer to boot loader ObjectFile or nullptr if there
      *         is no matching boot loader.
      */
     ObjectFile *getBootLoader(ObjectFile *const obj);

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

     ArmSystem(Params *p);
     ~ArmSystem();

     /**
      * Initialise the system
      */
     virtual void initState();

     virtual Addr fixFuncEventAddr(Addr addr)
     {
         // Remove the low bit that thumb symbols have set
         // but that aren't actually odd aligned
         if (addr & 0x1)
             return addr & ~1;
         return addr;
     }

     /** 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; }

     /** Sets the pointer to the Generic Timer. */
     void setGenericTimer(GenericTimer *generic_timer)
     {
         _genericTimer = generic_timer;
     }

     /** Get a pointer to the system's generic timer model */
     GenericTimer *getGenericTimer() const { return _genericTimer; }

     /** 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 resetAddr64() const { return _resetAddr64; }

     /** Returns true if ASID is 16 bits in AArch64 (ARMv8) */
     bool haveLargeAsid64() const { return _haveLargeAsid64; }

     /** 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());
     }

     /**
      * Range used by memory-mapped m5 pseudo-ops if enabled. Returns
      * an invalid/empty range if disabled.
      */
     const AddrRange &m5opRange() const { return _m5opRange; }

     /** 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);

     /** 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 resetAddr64(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 uint64_t callSemihosting64(ThreadContext *tc,
                                       uint32_t op, uint64_t param);

     /** Make a Semihosting call from aarch32 */
     static uint32_t callSemihosting32(ThreadContext *tc,
                                       uint32_t op, uint32_t param);
 };

 class GenericArmSystem : public ArmSystem
 {
   public:
     typedef GenericArmSystemParams Params;
     const Params *
     params() const
     {
         return dynamic_cast<const Params *>(_params);
     }

     GenericArmSystem(Params *p) : ArmSystem(p) {};
     virtual ~GenericArmSystem() {};

     /**
      * Initialise the system
      */
     virtual void initState();
 };

 #endif
	/*
	* Copyright (c) 2010, 2012-2013, 2015-2018 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.
	*
	* Authors: Ali Saidi
	*/

	#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 "params/GenericArmSystem.hh"
	#include "sim/sim_object.hh"
	#include "sim/system.hh"

	class GenericTimer;
	class ThreadContext;

	class ArmSystem : public System
	{
	protected:
	/**
	* PC based event to skip the dprink() call and emulate its
	* functionality
	*/
	Linux::DebugPrintkEvent *debugPrintkEvent;

	/** Bootloaders */
	std::vector<std::unique_ptr<ObjectFile>> bootLoaders;

	/**
	* Pointer to the bootloader object
	*/
	ObjectFile *bootldr;

	/**
	* 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;

	/**
	* Pointer to the Generic Timer wrapper.
	*/
	GenericTimer *_genericTimer;

	/**
	* True if the register width of the highest implemented exception level is
	* 64 bits (ARMv8)
	*/
	bool _highestELIs64;

	/**
	* Reset address if the highest implemented exception level is 64 bits
	* (ARMv8)
	*/
	const Addr _resetAddr64;

	/**
	* 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;

	/**
	* Range for memory-mapped m5 pseudo ops. The range will be
	* invalid/empty if disabled.
	*/
	const AddrRange _m5opRange;

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

	protected:
	/**
	* Get a boot loader that matches the kernel.
	*
	* @param obj Kernel binary
	* @return Pointer to boot loader ObjectFile or nullptr if there
	* is no matching boot loader.
	*/
	ObjectFile getBootLoader(ObjectFile const obj);

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

	ArmSystem(Params *p);
	~ArmSystem();

	/**
	* Initialise the system
	*/
	virtual void initState();

	virtual Addr fixFuncEventAddr(Addr addr)
	{
	// Remove the low bit that thumb symbols have set
	// but that aren't actually odd aligned
	if (addr & 0x1)
	return addr & ~1;
	return addr;
	}

	/** 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; }

	/** Sets the pointer to the Generic Timer. */
	void setGenericTimer(GenericTimer *generic_timer)
	{
	_genericTimer = generic_timer;
	}

	/** Get a pointer to the system's generic timer model */
	GenericTimer *getGenericTimer() const { return _genericTimer; }

	/** 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 resetAddr64() const { return _resetAddr64; }

	/** Returns true if ASID is 16 bits in AArch64 (ARMv8) */
	bool haveLargeAsid64() const { return _haveLargeAsid64; }

	/** 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());
	}

	/**
	* Range used by memory-mapped m5 pseudo-ops if enabled. Returns
	* an invalid/empty range if disabled.
	*/
	const AddrRange &m5opRange() const { return _m5opRange; }

	/** 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);

	/** 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 resetAddr64(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 uint64_t callSemihosting64(ThreadContext *tc,
	uint32_t op, uint64_t param);

	/** Make a Semihosting call from aarch32 */
	static uint32_t callSemihosting32(ThreadContext *tc,
	uint32_t op, uint32_t param);
	};

	class GenericArmSystem : public ArmSystem
	{
	public:
	typedef GenericArmSystemParams Params;
	const Params *
	params() const
	{
	return dynamic_cast<const Params *>(_params);
	}

	GenericArmSystem(Params *p) : ArmSystem(p) {};
	virtual ~GenericArmSystem() {};

	/**
	* Initialise the system
	*/
	virtual void initState();
	};

	#endif