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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) 2009 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: Gabe Black
*/
#ifndef __ARCH_ARM_ISA_HH__
#define __ARCH_ARM_ISA_HH__
#include "arch/arm/registers.hh"
#include "arch/arm/tlb.hh"
#include "arch/arm/types.hh"
#include "debug/Checkpoint.hh"
class ThreadContext;
class Checkpoint;
class EventManager;
namespace ArmISA
{
class ISA
{
protected:
MiscReg miscRegs[NumMiscRegs];
const IntRegIndex *intRegMap;
void
updateRegMap(CPSR cpsr)
{
switch (cpsr.mode) {
case MODE_USER:
case MODE_SYSTEM:
intRegMap = IntRegUsrMap;
break;
case MODE_FIQ:
intRegMap = IntRegFiqMap;
break;
case MODE_IRQ:
intRegMap = IntRegIrqMap;
break;
case MODE_SVC:
intRegMap = IntRegSvcMap;
break;
case MODE_MON:
intRegMap = IntRegMonMap;
break;
case MODE_ABORT:
intRegMap = IntRegAbtMap;
break;
case MODE_UNDEFINED:
intRegMap = IntRegUndMap;
break;
default:
panic("Unrecognized mode setting in CPSR.\n");
}
}
public:
void clear();
MiscReg readMiscRegNoEffect(int misc_reg);
MiscReg readMiscReg(int misc_reg, ThreadContext *tc);
void setMiscRegNoEffect(int misc_reg, const MiscReg &val);
void setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc);
int
flattenIntIndex(int reg)
{
assert(reg >= 0);
if (reg < NUM_ARCH_INTREGS) {
return intRegMap[reg];
} else if (reg < NUM_INTREGS) {
return reg;
} else {
int mode = reg / intRegsPerMode;
reg = reg % intRegsPerMode;
switch (mode) {
case MODE_USER:
case MODE_SYSTEM:
return INTREG_USR(reg);
case MODE_FIQ:
return INTREG_FIQ(reg);
case MODE_IRQ:
return INTREG_IRQ(reg);
case MODE_SVC:
return INTREG_SVC(reg);
case MODE_MON:
return INTREG_MON(reg);
case MODE_ABORT:
return INTREG_ABT(reg);
case MODE_UNDEFINED:
return INTREG_UND(reg);
default:
panic("Flattening into an unknown mode.\n");
}
}
}
int
flattenFloatIndex(int reg)
{
return reg;
}
int
flattenMiscIndex(int reg)
{
if (reg == MISCREG_SPSR) {
int spsr_idx = NUM_MISCREGS;
CPSR cpsr = miscRegs[MISCREG_CPSR];
switch (cpsr.mode) {
case MODE_USER:
warn("User mode does not have SPSR\n");
spsr_idx = MISCREG_SPSR;
break;
case MODE_FIQ:
spsr_idx = MISCREG_SPSR_FIQ;
break;
case MODE_IRQ:
spsr_idx = MISCREG_SPSR_IRQ;
break;
case MODE_SVC:
spsr_idx = MISCREG_SPSR_SVC;
break;
case MODE_MON:
spsr_idx = MISCREG_SPSR_MON;
break;
case MODE_ABORT:
spsr_idx = MISCREG_SPSR_ABT;
break;
case MODE_UNDEFINED:
spsr_idx = MISCREG_SPSR_UND;
break;
default:
warn("Trying to access SPSR in an invalid mode: %d\n",
cpsr.mode);
spsr_idx = MISCREG_SPSR;
break;
}
return spsr_idx;
}
return reg;
}
void serialize(EventManager *em, std::ostream &os)
{
DPRINTF(Checkpoint, "Serializing Arm Misc Registers\n");
SERIALIZE_ARRAY(miscRegs, NumMiscRegs);
}
void unserialize(EventManager *em, Checkpoint *cp,
const std::string §ion)
{
DPRINTF(Checkpoint, "Unserializing Arm Misc Registers\n");
UNSERIALIZE_ARRAY(miscRegs, NumMiscRegs);
CPSR tmp_cpsr = miscRegs[MISCREG_CPSR];
updateRegMap(tmp_cpsr);
}
ISA()
{
SCTLR sctlr;
sctlr = 0;
miscRegs[MISCREG_SCTLR_RST] = sctlr;
clear();
}
};
}
#endif
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