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/*
* Copyright (c) 2010 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) 2003-2005 The Regents of The University of Michigan
* Copyright (c) 2007-2008 The Florida State University
* 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: Korey Sewell
* Stephen Hines
*/
#ifndef __ARCH_ARM_UTILITY_HH__
#define __ARCH_ARM_UTILITY_HH__
#include "arch/arm/isa_traits.hh"
#include "arch/arm/miscregs.hh"
#include "arch/arm/types.hh"
#include "base/misc.hh"
#include "base/trace.hh"
#include "base/types.hh"
#include "cpu/static_inst.hh"
#include "cpu/thread_context.hh"
namespace ArmISA {
inline PCState
buildRetPC(const PCState &curPC, const PCState &callPC)
{
PCState retPC = callPC;
retPC.uEnd();
return retPC;
}
inline bool
testPredicate(CPSR cpsr, ConditionCode code)
{
switch (code)
{
case COND_EQ: return cpsr.z;
case COND_NE: return !cpsr.z;
case COND_CS: return cpsr.c;
case COND_CC: return !cpsr.c;
case COND_MI: return cpsr.n;
case COND_PL: return !cpsr.n;
case COND_VS: return cpsr.v;
case COND_VC: return !cpsr.v;
case COND_HI: return (cpsr.c && !cpsr.z);
case COND_LS: return !(cpsr.c && !cpsr.z);
case COND_GE: return !(cpsr.n ^ cpsr.v);
case COND_LT: return (cpsr.n ^ cpsr.v);
case COND_GT: return !(cpsr.n ^ cpsr.v || cpsr.z);
case COND_LE: return (cpsr.n ^ cpsr.v || cpsr.z);
case COND_AL: return true;
case COND_UC: return true;
default:
panic("Unhandled predicate condition: %d\n", code);
}
}
/**
* Function to insure ISA semantics about 0 registers.
* @param tc The thread context.
*/
template <class TC>
void zeroRegisters(TC *tc);
inline void startupCPU(ThreadContext *tc, int cpuId)
{
tc->activate(0);
}
static inline void
copyRegs(ThreadContext *src, ThreadContext *dest)
{
panic("Copy Regs Not Implemented Yet\n");
}
static inline void
copyMiscRegs(ThreadContext *src, ThreadContext *dest)
{
panic("Copy Misc. Regs Not Implemented Yet\n");
}
void initCPU(ThreadContext *tc, int cpuId);
static inline bool
inUserMode(CPSR cpsr)
{
return cpsr.mode == MODE_USER;
}
static inline bool
inUserMode(ThreadContext *tc)
{
return inUserMode(tc->readMiscRegNoEffect(MISCREG_CPSR));
}
static inline bool
inPrivilegedMode(CPSR cpsr)
{
return !inUserMode(cpsr);
}
static inline bool
inPrivilegedMode(ThreadContext *tc)
{
return !inUserMode(tc);
}
static inline bool
vfpEnabled(CPACR cpacr, CPSR cpsr)
{
return cpacr.cp10 == 0x3 ||
(cpacr.cp10 == 0x1 && inPrivilegedMode(cpsr));
}
static inline bool
vfpEnabled(CPACR cpacr, CPSR cpsr, FPEXC fpexc)
{
return fpexc.en && vfpEnabled(cpacr, cpsr);
}
static inline bool
neonEnabled(CPACR cpacr, CPSR cpsr, FPEXC fpexc)
{
return !cpacr.asedis && vfpEnabled(cpacr, cpsr, fpexc);
}
uint64_t getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp);
Fault setCp15Register(uint32_t &Rd, int CRn, int opc1, int CRm, int opc2);
Fault readCp15Register(uint32_t &Rd, int CRn, int opc1, int CRm, int opc2);
void skipFunction(ThreadContext *tc);
inline void
advancePC(PCState &pc, const StaticInstPtr inst)
{
inst->advancePC(pc);
}
};
#endif
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