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/*
* Copyright (c) 2010, 2012-2021 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.
*/
#ifndef __ARCH_ARM_ISA_HH__
#define __ARCH_ARM_ISA_HH__
#include "arch/arm/isa_device.hh"
#include "arch/arm/miscregs.hh"
#include "arch/arm/registers.hh"
#include "arch/arm/self_debug.hh"
#include "arch/arm/system.hh"
#include "arch/arm/tlb.hh"
#include "arch/arm/types.hh"
#include "arch/arm/utility.hh"
#include "arch/generic/isa.hh"
#include "arch/generic/traits.hh"
#include "debug/Checkpoint.hh"
#include "enums/DecoderFlavor.hh"
#include "enums/VecRegRenameMode.hh"
#include "sim/sim_object.hh"
struct ArmISAParams;
struct DummyArmISADeviceParams;
class Checkpoint;
class EventManager;
namespace ArmISA
{
class ISA : public BaseISA
{
protected:
// Parent system
ArmSystem *system;
// Micro Architecture
const Enums::DecoderFlavor _decoderFlavor;
const Enums::VecRegRenameMode _vecRegRenameMode;
/** Dummy device for to handle non-existing ISA devices */
DummyISADevice dummyDevice;
// PMU belonging to this ISA
BaseISADevice *pmu;
// Generic timer interface belonging to this ISA
std::unique_ptr<BaseISADevice> timer;
// GICv3 CPU interface belonging to this ISA
std::unique_ptr<BaseISADevice> gicv3CpuInterface;
// Cached copies of system-level properties
bool highestELIs64;
bool haveSecurity;
bool haveLPAE;
bool haveVirtualization;
bool haveCrypto;
bool haveLargeAsid64;
uint8_t physAddrRange;
bool haveSVE;
bool haveLSE;
bool haveVHE;
bool havePAN;
bool haveSecEL2;
bool haveTME;
/** SVE vector length in quadwords */
unsigned sveVL;
/**
* If true, accesses to IMPLEMENTATION DEFINED registers are treated
* as NOP hence not causing UNDEFINED INSTRUCTION.
*/
bool impdefAsNop;
bool afterStartup;
SelfDebug * selfDebug;
/** MiscReg metadata **/
struct MiscRegLUTEntry {
uint32_t lower; // Lower half mapped to this register
uint32_t upper; // Upper half mapped to this register
uint64_t _reset; // value taken on reset (i.e. initialization)
uint64_t _res0; // reserved
uint64_t _res1; // reserved
uint64_t _raz; // read as zero (fixed at 0)
uint64_t _rao; // read as one (fixed at 1)
public:
MiscRegLUTEntry() :
lower(0), upper(0),
_reset(0), _res0(0), _res1(0), _raz(0), _rao(0) {}
uint64_t reset() const { return _reset; }
uint64_t res0() const { return _res0; }
uint64_t res1() const { return _res1; }
uint64_t raz() const { return _raz; }
uint64_t rao() const { return _rao; }
// raz/rao implies writes ignored
uint64_t wi() const { return _raz | _rao; }
};
/** Metadata table accessible via the value of the register */
static std::vector<struct MiscRegLUTEntry> lookUpMiscReg;
class MiscRegLUTEntryInitializer {
struct MiscRegLUTEntry &entry;
std::bitset<NUM_MISCREG_INFOS> &info;
typedef const MiscRegLUTEntryInitializer& chain;
public:
chain mapsTo(uint32_t l, uint32_t u = 0) const {
entry.lower = l;
entry.upper = u;
return *this;
}
chain res0(uint64_t mask) const {
entry._res0 = mask;
return *this;
}
chain res1(uint64_t mask) const {
entry._res1 = mask;
return *this;
}
chain raz(uint64_t mask) const {
entry._raz = mask;
return *this;
}
chain rao(uint64_t mask) const {
entry._rao = mask;
return *this;
}
chain implemented(bool v = true) const {
info[MISCREG_IMPLEMENTED] = v;
return *this;
}
chain unimplemented() const {
return implemented(false);
}
chain unverifiable(bool v = true) const {
info[MISCREG_UNVERIFIABLE] = v;
return *this;
}
chain warnNotFail(bool v = true) const {
info[MISCREG_WARN_NOT_FAIL] = v;
return *this;
}
chain mutex(bool v = true) const {
info[MISCREG_MUTEX] = v;
return *this;
}
chain banked(bool v = true) const {
info[MISCREG_BANKED] = v;
return *this;
}
chain banked64(bool v = true) const {
info[MISCREG_BANKED64] = v;
return *this;
}
chain bankedChild(bool v = true) const {
info[MISCREG_BANKED_CHILD] = v;
return *this;
}
chain userNonSecureRead(bool v = true) const {
info[MISCREG_USR_NS_RD] = v;
return *this;
}
chain userNonSecureWrite(bool v = true) const {
info[MISCREG_USR_NS_WR] = v;
return *this;
}
chain userSecureRead(bool v = true) const {
info[MISCREG_USR_S_RD] = v;
return *this;
}
chain userSecureWrite(bool v = true) const {
info[MISCREG_USR_S_WR] = v;
return *this;
}
chain user(bool v = true) const {
userNonSecureRead(v);
userNonSecureWrite(v);
userSecureRead(v);
userSecureWrite(v);
return *this;
}
chain privNonSecureRead(bool v = true) const {
info[MISCREG_PRI_NS_RD] = v;
return *this;
}
chain privNonSecureWrite(bool v = true) const {
info[MISCREG_PRI_NS_WR] = v;
return *this;
}
chain privNonSecure(bool v = true) const {
privNonSecureRead(v);
privNonSecureWrite(v);
return *this;
}
chain privSecureRead(bool v = true) const {
info[MISCREG_PRI_S_RD] = v;
return *this;
}
chain privSecureWrite(bool v = true) const {
info[MISCREG_PRI_S_WR] = v;
return *this;
}
chain privSecure(bool v = true) const {
privSecureRead(v);
privSecureWrite(v);
return *this;
}
chain priv(bool v = true) const {
privSecure(v);
privNonSecure(v);
return *this;
}
chain privRead(bool v = true) const {
privSecureRead(v);
privNonSecureRead(v);
return *this;
}
chain hypE2HSecureRead(bool v = true) const {
info[MISCREG_HYP_E2H_S_RD] = v;
return *this;
}
chain hypE2HNonSecureRead(bool v = true) const {
info[MISCREG_HYP_E2H_NS_RD] = v;
return *this;
}
chain hypE2HRead(bool v = true) const {
hypE2HSecureRead(v);
hypE2HNonSecureRead(v);
return *this;
}
chain hypE2HSecureWrite(bool v = true) const {
info[MISCREG_HYP_E2H_S_WR] = v;
return *this;
}
chain hypE2HNonSecureWrite(bool v = true) const {
info[MISCREG_HYP_E2H_NS_WR] = v;
return *this;
}
chain hypE2HWrite(bool v = true) const {
hypE2HSecureWrite(v);
hypE2HNonSecureWrite(v);
return *this;
}
chain hypE2H(bool v = true) const {
hypE2HRead(v);
hypE2HWrite(v);
return *this;
}
chain hypSecureRead(bool v = true) const {
info[MISCREG_HYP_S_RD] = v;
return *this;
}
chain hypNonSecureRead(bool v = true) const {
info[MISCREG_HYP_NS_RD] = v;
return *this;
}
chain hypRead(bool v = true) const {
hypE2HRead(v);
hypSecureRead(v);
hypNonSecureRead(v);
return *this;
}
chain hypSecureWrite(bool v = true) const {
info[MISCREG_HYP_S_WR] = v;
return *this;
}
chain hypNonSecureWrite(bool v = true) const {
info[MISCREG_HYP_NS_WR] = v;
return *this;
}
chain hypWrite(bool v = true) const {
hypE2HWrite(v);
hypSecureWrite(v);
hypNonSecureWrite(v);
return *this;
}
chain hypSecure(bool v = true) const {
hypE2HSecureRead(v);
hypE2HSecureWrite(v);
hypSecureRead(v);
hypSecureWrite(v);
return *this;
}
chain hyp(bool v = true) const {
hypRead(v);
hypWrite(v);
return *this;
}
chain monE2HRead(bool v = true) const {
info[MISCREG_MON_E2H_RD] = v;
return *this;
}
chain monE2HWrite(bool v = true) const {
info[MISCREG_MON_E2H_WR] = v;
return *this;
}
chain monE2H(bool v = true) const {
monE2HRead(v);
monE2HWrite(v);
return *this;
}
chain monSecureRead(bool v = true) const {
monE2HRead(v);
info[MISCREG_MON_NS0_RD] = v;
return *this;
}
chain monSecureWrite(bool v = true) const {
monE2HWrite(v);
info[MISCREG_MON_NS0_WR] = v;
return *this;
}
chain monNonSecureRead(bool v = true) const {
monE2HRead(v);
info[MISCREG_MON_NS1_RD] = v;
return *this;
}
chain monNonSecureWrite(bool v = true) const {
monE2HWrite(v);
info[MISCREG_MON_NS1_WR] = v;
return *this;
}
chain mon(bool v = true) const {
monSecureRead(v);
monSecureWrite(v);
monNonSecureRead(v);
monNonSecureWrite(v);
return *this;
}
chain monSecure(bool v = true) const {
monSecureRead(v);
monSecureWrite(v);
return *this;
}
chain monNonSecure(bool v = true) const {
monNonSecureRead(v);
monNonSecureWrite(v);
return *this;
}
chain allPrivileges(bool v = true) const {
userNonSecureRead(v);
userNonSecureWrite(v);
userSecureRead(v);
userSecureWrite(v);
privNonSecureRead(v);
privNonSecureWrite(v);
privSecureRead(v);
privSecureWrite(v);
hypRead(v);
hypWrite(v);
monSecureRead(v);
monSecureWrite(v);
monNonSecureRead(v);
monNonSecureWrite(v);
return *this;
}
chain nonSecure(bool v = true) const {
userNonSecureRead(v);
userNonSecureWrite(v);
privNonSecureRead(v);
privNonSecureWrite(v);
hypRead(v);
hypWrite(v);
monNonSecureRead(v);
monNonSecureWrite(v);
return *this;
}
chain secure(bool v = true) const {
userSecureRead(v);
userSecureWrite(v);
privSecureRead(v);
privSecureWrite(v);
monSecureRead(v);
monSecureWrite(v);
return *this;
}
chain reads(bool v) const {
userNonSecureRead(v);
userSecureRead(v);
privNonSecureRead(v);
privSecureRead(v);
hypRead(v);
monSecureRead(v);
monNonSecureRead(v);
return *this;
}
chain writes(bool v) const {
userNonSecureWrite(v);
userSecureWrite(v);
privNonSecureWrite(v);
privSecureWrite(v);
hypWrite(v);
monSecureWrite(v);
monNonSecureWrite(v);
return *this;
}
chain exceptUserMode() const {
user(0);
return *this;
}
chain highest(ArmSystem *const sys) const;
MiscRegLUTEntryInitializer(struct MiscRegLUTEntry &e,
std::bitset<NUM_MISCREG_INFOS> &i)
: entry(e),
info(i)
{
// force unimplemented registers to be thusly declared
implemented(1);
}
};
const MiscRegLUTEntryInitializer InitReg(uint32_t reg) {
return MiscRegLUTEntryInitializer(lookUpMiscReg[reg],
miscRegInfo[reg]);
}
void initializeMiscRegMetadata();
RegVal miscRegs[NumMiscRegs];
const IntRegIndex *intRegMap;
void
updateRegMap(CPSR cpsr)
{
if (cpsr.width == 0) {
intRegMap = IntReg64Map;
} else {
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_HYP:
intRegMap = IntRegHypMap;
break;
case MODE_UNDEFINED:
intRegMap = IntRegUndMap;
break;
default:
panic("Unrecognized mode setting in CPSR.\n");
}
}
}
BaseISADevice &getGenericTimer();
BaseISADevice &getGICv3CPUInterface();
private:
void assert32() { assert(((CPSR)readMiscReg(MISCREG_CPSR)).width); }
void assert64() { assert(!((CPSR)readMiscReg(MISCREG_CPSR)).width); }
public:
void clear();
protected:
void clear32(const ArmISAParams &p, const SCTLR &sctlr_rst);
void clear64(const ArmISAParams &p);
void initID32(const ArmISAParams &p);
void initID64(const ArmISAParams &p);
void addressTranslation(TLB::ArmTranslationType tran_type,
BaseTLB::Mode mode, Request::Flags flags, RegVal val);
void addressTranslation64(TLB::ArmTranslationType tran_type,
BaseTLB::Mode mode, Request::Flags flags, RegVal val);
public:
SelfDebug*
getSelfDebug() const
{
return selfDebug;
}
static SelfDebug*
getSelfDebug(ThreadContext *tc)
{
auto *arm_isa = static_cast<ArmISA::ISA *>(tc->getIsaPtr());
return arm_isa->getSelfDebug();
}
RegVal readMiscRegNoEffect(int misc_reg) const;
RegVal readMiscReg(int misc_reg);
void setMiscRegNoEffect(int misc_reg, RegVal val);
void setMiscReg(int misc_reg, RegVal val);
RegId
flattenRegId(const RegId& regId) const
{
switch (regId.classValue()) {
case IntRegClass:
return RegId(IntRegClass, flattenIntIndex(regId.index()));
case FloatRegClass:
return RegId(FloatRegClass, flattenFloatIndex(regId.index()));
case VecRegClass:
return RegId(VecRegClass, flattenVecIndex(regId.index()));
case VecElemClass:
return RegId(VecElemClass, flattenVecElemIndex(regId.index()),
regId.elemIndex());
case VecPredRegClass:
return RegId(VecPredRegClass,
flattenVecPredIndex(regId.index()));
case CCRegClass:
return RegId(CCRegClass, flattenCCIndex(regId.index()));
case MiscRegClass:
return RegId(MiscRegClass, flattenMiscIndex(regId.index()));
}
return RegId();
}
int
flattenIntIndex(int reg) const
{
assert(reg >= 0);
if (reg < NUM_ARCH_INTREGS) {
return intRegMap[reg];
} else if (reg < NUM_INTREGS) {
return reg;
} else if (reg == INTREG_SPX) {
CPSR cpsr = miscRegs[MISCREG_CPSR];
ExceptionLevel el = opModeToEL(
(OperatingMode) (uint8_t) cpsr.mode);
if (!cpsr.sp && el != EL0)
return INTREG_SP0;
switch (el) {
case EL3:
return INTREG_SP3;
case EL2:
return INTREG_SP2;
case EL1:
return INTREG_SP1;
case EL0:
return INTREG_SP0;
default:
panic("Invalid exception level");
return 0; // Never happens.
}
} else {
return flattenIntRegModeIndex(reg);
}
}
int
flattenFloatIndex(int reg) const
{
assert(reg >= 0);
return reg;
}
int
flattenVecIndex(int reg) const
{
assert(reg >= 0);
return reg;
}
int
flattenVecElemIndex(int reg) const
{
assert(reg >= 0);
return reg;
}
int
flattenVecPredIndex(int reg) const
{
assert(reg >= 0);
return reg;
}
int
flattenCCIndex(int reg) const
{
assert(reg >= 0);
return reg;
}
int
flattenMiscIndex(int reg) const
{
assert(reg >= 0);
int flat_idx = reg;
if (reg == MISCREG_SPSR) {
CPSR cpsr = miscRegs[MISCREG_CPSR];
switch (cpsr.mode) {
case MODE_EL0T:
warn("User mode does not have SPSR\n");
flat_idx = MISCREG_SPSR;
break;
case MODE_EL1T:
case MODE_EL1H:
flat_idx = MISCREG_SPSR_EL1;
break;
case MODE_EL2T:
case MODE_EL2H:
flat_idx = MISCREG_SPSR_EL2;
break;
case MODE_EL3T:
case MODE_EL3H:
flat_idx = MISCREG_SPSR_EL3;
break;
case MODE_USER:
warn("User mode does not have SPSR\n");
flat_idx = MISCREG_SPSR;
break;
case MODE_FIQ:
flat_idx = MISCREG_SPSR_FIQ;
break;
case MODE_IRQ:
flat_idx = MISCREG_SPSR_IRQ;
break;
case MODE_SVC:
flat_idx = MISCREG_SPSR_SVC;
break;
case MODE_MON:
flat_idx = MISCREG_SPSR_MON;
break;
case MODE_ABORT:
flat_idx = MISCREG_SPSR_ABT;
break;
case MODE_HYP:
flat_idx = MISCREG_SPSR_HYP;
break;
case MODE_UNDEFINED:
flat_idx = MISCREG_SPSR_UND;
break;
default:
warn("Trying to access SPSR in an invalid mode: %d\n",
cpsr.mode);
flat_idx = MISCREG_SPSR;
break;
}
} else if (miscRegInfo[reg][MISCREG_MUTEX]) {
// Mutually exclusive CP15 register
switch (reg) {
case MISCREG_PRRR_MAIR0:
case MISCREG_PRRR_MAIR0_NS:
case MISCREG_PRRR_MAIR0_S:
{
TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
// If the muxed reg has been flattened, work out the
// offset and apply it to the unmuxed reg
int idxOffset = reg - MISCREG_PRRR_MAIR0;
if (ttbcr.eae)
flat_idx = flattenMiscIndex(MISCREG_MAIR0 +
idxOffset);
else
flat_idx = flattenMiscIndex(MISCREG_PRRR +
idxOffset);
}
break;
case MISCREG_NMRR_MAIR1:
case MISCREG_NMRR_MAIR1_NS:
case MISCREG_NMRR_MAIR1_S:
{
TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR);
// If the muxed reg has been flattened, work out the
// offset and apply it to the unmuxed reg
int idxOffset = reg - MISCREG_NMRR_MAIR1;
if (ttbcr.eae)
flat_idx = flattenMiscIndex(MISCREG_MAIR1 +
idxOffset);
else
flat_idx = flattenMiscIndex(MISCREG_NMRR +
idxOffset);
}
break;
case MISCREG_PMXEVTYPER_PMCCFILTR:
{
PMSELR pmselr = miscRegs[MISCREG_PMSELR];
if (pmselr.sel == 31)
flat_idx = flattenMiscIndex(MISCREG_PMCCFILTR);
else
flat_idx = flattenMiscIndex(MISCREG_PMXEVTYPER);
}
break;
default:
panic("Unrecognized misc. register.\n");
break;
}
} else {
if (miscRegInfo[reg][MISCREG_BANKED]) {
bool secureReg = haveSecurity && !highestELIs64 &&
inSecureState(miscRegs[MISCREG_SCR],
miscRegs[MISCREG_CPSR]);
flat_idx += secureReg ? 2 : 1;
} else {
flat_idx = snsBankedIndex64((MiscRegIndex)reg,
!inSecureState(miscRegs[MISCREG_SCR],
miscRegs[MISCREG_CPSR]));
}
}
return flat_idx;
}
/**
* Returns the enconcing equivalent when VHE is implemented and
* HCR_EL2.E2H is enabled and executing at EL2
*/
int
redirectRegVHE(ThreadContext * tc, int misc_reg)
{
const HCR hcr = readMiscRegNoEffect(MISCREG_HCR_EL2);
if (hcr.e2h == 0x0 || currEL(tc) != EL2)
return misc_reg;
SCR scr = readMiscRegNoEffect(MISCREG_SCR_EL3);
bool sec_el2 = scr.eel2 && haveSecEL2;
switch(misc_reg) {
case MISCREG_SPSR_EL1:
return MISCREG_SPSR_EL2;
case MISCREG_ELR_EL1:
return MISCREG_ELR_EL2;
case MISCREG_SCTLR_EL1:
return MISCREG_SCTLR_EL2;
case MISCREG_CPACR_EL1:
return MISCREG_CPTR_EL2;
// case :
// return MISCREG_TRFCR_EL2;
case MISCREG_TTBR0_EL1:
return MISCREG_TTBR0_EL2;
case MISCREG_TTBR1_EL1:
return MISCREG_TTBR1_EL2;
case MISCREG_TCR_EL1:
return MISCREG_TCR_EL2;
case MISCREG_AFSR0_EL1:
return MISCREG_AFSR0_EL2;
case MISCREG_AFSR1_EL1:
return MISCREG_AFSR1_EL2;
case MISCREG_ESR_EL1:
return MISCREG_ESR_EL2;
case MISCREG_FAR_EL1:
return MISCREG_FAR_EL2;
case MISCREG_MAIR_EL1:
return MISCREG_MAIR_EL2;
case MISCREG_AMAIR_EL1:
return MISCREG_AMAIR_EL2;
case MISCREG_VBAR_EL1:
return MISCREG_VBAR_EL2;
case MISCREG_CONTEXTIDR_EL1:
return MISCREG_CONTEXTIDR_EL2;
case MISCREG_CNTKCTL_EL1:
return MISCREG_CNTHCTL_EL2;
case MISCREG_CNTP_TVAL_EL0:
return sec_el2? MISCREG_CNTHPS_TVAL_EL2:
MISCREG_CNTHP_TVAL_EL2;
case MISCREG_CNTP_CTL_EL0:
return sec_el2? MISCREG_CNTHPS_CTL_EL2:
MISCREG_CNTHP_CTL_EL2;
case MISCREG_CNTP_CVAL_EL0:
return sec_el2? MISCREG_CNTHPS_CVAL_EL2:
MISCREG_CNTHP_CVAL_EL2;
case MISCREG_CNTV_TVAL_EL0:
return sec_el2? MISCREG_CNTHVS_TVAL_EL2:
MISCREG_CNTHV_TVAL_EL2;
case MISCREG_CNTV_CTL_EL0:
return sec_el2? MISCREG_CNTHVS_CTL_EL2:
MISCREG_CNTHV_CTL_EL2;
case MISCREG_CNTV_CVAL_EL0:
return sec_el2? MISCREG_CNTHVS_CVAL_EL2:
MISCREG_CNTHV_CVAL_EL2;
default:
return misc_reg;
}
/*should not be accessible */
return misc_reg;
}
int
snsBankedIndex64(MiscRegIndex reg, bool ns) const
{
int reg_as_int = static_cast<int>(reg);
if (miscRegInfo[reg][MISCREG_BANKED64]) {
reg_as_int += (haveSecurity && !ns) ? 2 : 1;
}
return reg_as_int;
}
std::pair<int,int> getMiscIndices(int misc_reg) const
{
// Note: indexes of AArch64 registers are left unchanged
int flat_idx = flattenMiscIndex(misc_reg);
if (lookUpMiscReg[flat_idx].lower == 0) {
return std::make_pair(flat_idx, 0);
}
// do additional S/NS flattenings if mapped to NS while in S
bool S = haveSecurity && !highestELIs64 &&
inSecureState(miscRegs[MISCREG_SCR],
miscRegs[MISCREG_CPSR]);
int lower = lookUpMiscReg[flat_idx].lower;
int upper = lookUpMiscReg[flat_idx].upper;
// upper == 0, which is CPSR, is not MISCREG_BANKED_CHILD (no-op)
lower += S && miscRegInfo[lower][MISCREG_BANKED_CHILD];
upper += S && miscRegInfo[upper][MISCREG_BANKED_CHILD];
return std::make_pair(lower, upper);
}
unsigned getCurSveVecLenInBits() const;
unsigned getCurSveVecLenInBitsAtReset() const { return sveVL * 128; }
static void zeroSveVecRegUpperPart(VecRegContainer &vc,
unsigned eCount);
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
void startup() override;
void setupThreadContext();
void takeOverFrom(ThreadContext *new_tc,
ThreadContext *old_tc) override;
Enums::DecoderFlavor decoderFlavor() const { return _decoderFlavor; }
/** Returns true if the ISA has a GICv3 cpu interface */
bool haveGICv3CpuIfc() const
{
// gicv3CpuInterface is initialized at startup time, hence
// trying to read its value before the startup stage will lead
// to an error
assert(afterStartup);
return gicv3CpuInterface != nullptr;
}
Enums::VecRegRenameMode
vecRegRenameMode() const
{
return _vecRegRenameMode;
}
PARAMS(ArmISA);
ISA(const Params &p);
uint64_t
getExecutingAsid() const override
{
return readMiscRegNoEffect(MISCREG_CONTEXTIDR);
}
bool
inUserMode() const override
{
CPSR cpsr = miscRegs[MISCREG_CPSR];
return ArmISA::inUserMode(cpsr);
}
};
}
template<>
struct RenameMode<ArmISA::ISA>
{
static Enums::VecRegRenameMode
init(const BaseISA* isa)
{
auto arm_isa = dynamic_cast<const ArmISA::ISA *>(isa);
assert(arm_isa);
return arm_isa->vecRegRenameMode();
}
static Enums::VecRegRenameMode
mode(const ArmISA::PCState& pc)
{
if (pc.aarch64()) {
return Enums::Full;
} else {
return Enums::Elem;
}
}
static bool
equalsInit(const BaseISA* isa1, const BaseISA* isa2)
{
return init(isa1) == init(isa2);
}
};
#endif