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/*
* Copyright (c) 2009-2010 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.
*
* 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
*/
#include "arch/arm/faults.hh"
#include "arch/arm/isa_traits.hh"
#include "arch/arm/utility.hh"
#include "cpu/thread_context.hh"
#if FULL_SYSTEM
#include "arch/arm/vtophys.hh"
#include "mem/vport.hh"
#endif
namespace ArmISA {
void
initCPU(ThreadContext *tc, int cpuId)
{
// Reset CP15?? What does that mean -- ali
// FPEXC.EN = 0
static Fault reset = new Reset;
if (cpuId == 0)
reset->invoke(tc);
}
uint64_t
getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp)
{
#if FULL_SYSTEM
if (size == (uint16_t)(-1))
size = ArmISA::MachineBytes;
if (fp)
panic("getArgument(): Floating point arguments not implemented\n");
if (number < NumArgumentRegs) {
// If the argument is 64 bits, it must be in an even regiser number
// Increment the number here if it isn't even
if (size == sizeof(uint64_t)) {
if ((number % 2) != 0)
number++;
// Read the two halves of the data
// number is inc here to get the second half of the 64 bit reg
uint64_t tmp;
tmp = tc->readIntReg(number++);
tmp |= tc->readIntReg(number) << 32;
return tmp;
} else {
return tc->readIntReg(number);
}
} else {
Addr sp = tc->readIntReg(StackPointerReg);
VirtualPort *vp = tc->getVirtPort();
uint64_t arg;
if (size == sizeof(uint64_t)) {
// If the argument is even it must be aligned
if ((number % 2) != 0)
number++;
arg = vp->read<uint64_t>(sp +
(number-NumArgumentRegs) * sizeof(uint32_t));
// since two 32 bit args == 1 64 bit arg, increment number
number++;
} else {
arg = vp->read<uint32_t>(sp +
(number-NumArgumentRegs) * sizeof(uint32_t));
}
return arg;
}
#else
panic("getArgument() only implemented for FULL_SYSTEM\n");
M5_DUMMY_RETURN
#endif
}
Fault
setCp15Register(uint32_t &Rd, int CRn, int opc1, int CRm, int opc2)
{
return new UnimpFault(csprintf("MCR CP15: CRn: %d opc1: %d CRm: %d opc1: %d\n",
CRn, opc1, CRm, opc2));
}
Fault
readCp15Register(uint32_t &Rd, int CRn, int opc1, int CRm, int opc2)
{
return new UnimpFault(csprintf("MRC CP15: CRn: %d opc1: %d CRm: %d opc1: %d\n",
CRn, opc1, CRm, opc2));
}
void
skipFunction(ThreadContext *tc)
{
Addr newpc = tc->readIntReg(ReturnAddressReg);
newpc &= ~ULL(1);
if (isThumb(tc->readPC()))
tc->setPC(newpc | PcTBit);
else
tc->setPC(newpc);
tc->setNextPC(tc->readPC() + sizeof(TheISA::MachInst));
}
}
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