| /* |
| * Copyright (c) 2010-2020 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. |
| */ |
| |
| #include "arch/arm/isa.hh" |
| |
| #include "arch/arm/faults.hh" |
| #include "arch/arm/interrupts.hh" |
| #include "arch/arm/pmu.hh" |
| #include "arch/arm/system.hh" |
| #include "arch/arm/tlb.hh" |
| #include "arch/arm/tlbi_op.hh" |
| #include "cpu/base.hh" |
| #include "cpu/checker/cpu.hh" |
| #include "debug/Arm.hh" |
| #include "debug/MiscRegs.hh" |
| #include "dev/arm/generic_timer.hh" |
| #include "dev/arm/gic_v3.hh" |
| #include "dev/arm/gic_v3_cpu_interface.hh" |
| #include "params/ArmISA.hh" |
| #include "sim/faults.hh" |
| #include "sim/stat_control.hh" |
| #include "sim/system.hh" |
| |
| namespace ArmISA |
| { |
| |
| ISA::ISA(Params *p) : BaseISA(p), system(NULL), |
| _decoderFlavor(p->decoderFlavor), _vecRegRenameMode(Enums::Full), |
| pmu(p->pmu), impdefAsNop(p->impdef_nop), |
| afterStartup(false) |
| { |
| miscRegs[MISCREG_SCTLR_RST] = 0; |
| |
| // Hook up a dummy device if we haven't been configured with a |
| // real PMU. By using a dummy device, we don't need to check that |
| // the PMU exist every time we try to access a PMU register. |
| if (!pmu) |
| pmu = &dummyDevice; |
| |
| // Give all ISA devices a pointer to this ISA |
| pmu->setISA(this); |
| |
| system = dynamic_cast<ArmSystem *>(p->system); |
| |
| // Cache system-level properties |
| if (FullSystem && system) { |
| highestELIs64 = system->highestELIs64(); |
| haveSecurity = system->haveSecurity(); |
| haveLPAE = system->haveLPAE(); |
| haveCrypto = system->haveCrypto(); |
| haveVirtualization = system->haveVirtualization(); |
| haveLargeAsid64 = system->haveLargeAsid64(); |
| physAddrRange = system->physAddrRange(); |
| haveSVE = system->haveSVE(); |
| havePAN = system->havePAN(); |
| sveVL = system->sveVL(); |
| haveLSE = system->haveLSE(); |
| } else { |
| highestELIs64 = true; // ArmSystem::highestELIs64 does the same |
| haveSecurity = haveLPAE = haveVirtualization = false; |
| haveCrypto = true; |
| haveLargeAsid64 = false; |
| physAddrRange = 32; // dummy value |
| haveSVE = true; |
| havePAN = false; |
| sveVL = p->sve_vl_se; |
| haveLSE = true; |
| } |
| |
| // Initial rename mode depends on highestEL |
| const_cast<Enums::VecRegRenameMode&>(_vecRegRenameMode) = |
| highestELIs64 ? Enums::Full : Enums::Elem; |
| |
| initializeMiscRegMetadata(); |
| preUnflattenMiscReg(); |
| |
| clear(); |
| } |
| |
| std::vector<struct ISA::MiscRegLUTEntry> ISA::lookUpMiscReg(NUM_MISCREGS); |
| |
| const ArmISAParams * |
| ISA::params() const |
| { |
| return dynamic_cast<const Params *>(_params); |
| } |
| |
| void |
| ISA::clear(ThreadContext *tc) |
| { |
| clear(); |
| // Invalidate cached copies of miscregs in the TLBs |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| } |
| |
| void |
| ISA::clear() |
| { |
| const Params *p(params()); |
| |
| SCTLR sctlr_rst = miscRegs[MISCREG_SCTLR_RST]; |
| memset(miscRegs, 0, sizeof(miscRegs)); |
| |
| initID32(p); |
| |
| // We always initialize AArch64 ID registers even |
| // if we are in AArch32. This is done since if we |
| // are in SE mode we don't know if our ArmProcess is |
| // AArch32 or AArch64 |
| initID64(p); |
| |
| // Start with an event in the mailbox |
| miscRegs[MISCREG_SEV_MAILBOX] = 1; |
| |
| // Separate Instruction and Data TLBs |
| miscRegs[MISCREG_TLBTR] = 1; |
| |
| MVFR0 mvfr0 = 0; |
| mvfr0.advSimdRegisters = 2; |
| mvfr0.singlePrecision = 2; |
| mvfr0.doublePrecision = 2; |
| mvfr0.vfpExceptionTrapping = 0; |
| mvfr0.divide = 1; |
| mvfr0.squareRoot = 1; |
| mvfr0.shortVectors = 1; |
| mvfr0.roundingModes = 1; |
| miscRegs[MISCREG_MVFR0] = mvfr0; |
| |
| MVFR1 mvfr1 = 0; |
| mvfr1.flushToZero = 1; |
| mvfr1.defaultNaN = 1; |
| mvfr1.advSimdLoadStore = 1; |
| mvfr1.advSimdInteger = 1; |
| mvfr1.advSimdSinglePrecision = 1; |
| mvfr1.advSimdHalfPrecision = 1; |
| mvfr1.vfpHalfPrecision = 1; |
| miscRegs[MISCREG_MVFR1] = mvfr1; |
| |
| // Reset values of PRRR and NMRR are implementation dependent |
| |
| // @todo: PRRR and NMRR in secure state? |
| miscRegs[MISCREG_PRRR_NS] = |
| (1 << 19) | // 19 |
| (0 << 18) | // 18 |
| (0 << 17) | // 17 |
| (1 << 16) | // 16 |
| (2 << 14) | // 15:14 |
| (0 << 12) | // 13:12 |
| (2 << 10) | // 11:10 |
| (2 << 8) | // 9:8 |
| (2 << 6) | // 7:6 |
| (2 << 4) | // 5:4 |
| (1 << 2) | // 3:2 |
| 0; // 1:0 |
| |
| miscRegs[MISCREG_NMRR_NS] = |
| (1 << 30) | // 31:30 |
| (0 << 26) | // 27:26 |
| (0 << 24) | // 25:24 |
| (3 << 22) | // 23:22 |
| (2 << 20) | // 21:20 |
| (0 << 18) | // 19:18 |
| (0 << 16) | // 17:16 |
| (1 << 14) | // 15:14 |
| (0 << 12) | // 13:12 |
| (2 << 10) | // 11:10 |
| (0 << 8) | // 9:8 |
| (3 << 6) | // 7:6 |
| (2 << 4) | // 5:4 |
| (0 << 2) | // 3:2 |
| 0; // 1:0 |
| |
| if (FullSystem && system->highestELIs64()) { |
| // Initialize AArch64 state |
| clear64(p); |
| return; |
| } |
| |
| // Initialize AArch32 state... |
| clear32(p, sctlr_rst); |
| } |
| |
| void |
| ISA::clear32(const ArmISAParams *p, const SCTLR &sctlr_rst) |
| { |
| CPSR cpsr = 0; |
| cpsr.mode = MODE_USER; |
| |
| if (FullSystem) { |
| miscRegs[MISCREG_MVBAR] = system->resetAddr(); |
| } |
| |
| miscRegs[MISCREG_CPSR] = cpsr; |
| updateRegMap(cpsr); |
| |
| SCTLR sctlr = 0; |
| sctlr.te = (bool) sctlr_rst.te; |
| sctlr.nmfi = (bool) sctlr_rst.nmfi; |
| sctlr.v = (bool) sctlr_rst.v; |
| sctlr.u = 1; |
| sctlr.xp = 1; |
| sctlr.rao2 = 1; |
| sctlr.rao3 = 1; |
| sctlr.rao4 = 0xf; // SCTLR[6:3] |
| sctlr.uci = 1; |
| sctlr.dze = 1; |
| miscRegs[MISCREG_SCTLR_NS] = sctlr; |
| miscRegs[MISCREG_SCTLR_RST] = sctlr_rst; |
| miscRegs[MISCREG_HCPTR] = 0; |
| |
| miscRegs[MISCREG_CPACR] = 0; |
| |
| miscRegs[MISCREG_FPSID] = p->fpsid; |
| |
| if (haveLPAE) { |
| TTBCR ttbcr = miscRegs[MISCREG_TTBCR_NS]; |
| ttbcr.eae = 0; |
| miscRegs[MISCREG_TTBCR_NS] = ttbcr; |
| // Enforce consistency with system-level settings |
| miscRegs[MISCREG_ID_MMFR0] = (miscRegs[MISCREG_ID_MMFR0] & ~0xf) | 0x5; |
| } |
| |
| if (haveSecurity) { |
| miscRegs[MISCREG_SCTLR_S] = sctlr; |
| miscRegs[MISCREG_SCR] = 0; |
| miscRegs[MISCREG_VBAR_S] = 0; |
| } else { |
| // we're always non-secure |
| miscRegs[MISCREG_SCR] = 1; |
| } |
| |
| //XXX We need to initialize the rest of the state. |
| } |
| |
| void |
| ISA::clear64(const ArmISAParams *p) |
| { |
| CPSR cpsr = 0; |
| Addr rvbar = system->resetAddr(); |
| switch (system->highestEL()) { |
| // Set initial EL to highest implemented EL using associated stack |
| // pointer (SP_ELx); set RVBAR_ELx to implementation defined reset |
| // value |
| case EL3: |
| cpsr.mode = MODE_EL3H; |
| miscRegs[MISCREG_RVBAR_EL3] = rvbar; |
| break; |
| case EL2: |
| cpsr.mode = MODE_EL2H; |
| miscRegs[MISCREG_RVBAR_EL2] = rvbar; |
| break; |
| case EL1: |
| cpsr.mode = MODE_EL1H; |
| miscRegs[MISCREG_RVBAR_EL1] = rvbar; |
| break; |
| default: |
| panic("Invalid highest implemented exception level"); |
| break; |
| } |
| |
| // Initialize rest of CPSR |
| cpsr.daif = 0xf; // Mask all interrupts |
| cpsr.ss = 0; |
| cpsr.il = 0; |
| miscRegs[MISCREG_CPSR] = cpsr; |
| updateRegMap(cpsr); |
| |
| // Initialize other control registers |
| miscRegs[MISCREG_MPIDR_EL1] = 0x80000000; |
| if (haveSecurity) { |
| miscRegs[MISCREG_SCTLR_EL3] = 0x30c50830; |
| miscRegs[MISCREG_SCR_EL3] = 0x00000030; // RES1 fields |
| } else if (haveVirtualization) { |
| // also MISCREG_SCTLR_EL2 (by mapping) |
| miscRegs[MISCREG_HSCTLR] = 0x30c50830; |
| } else { |
| // also MISCREG_SCTLR_EL1 (by mapping) |
| miscRegs[MISCREG_SCTLR_NS] = 0x30d00800 | 0x00050030; // RES1 | init |
| // Always non-secure |
| miscRegs[MISCREG_SCR_EL3] = 1; |
| } |
| } |
| |
| void |
| ISA::initID32(const ArmISAParams *p) |
| { |
| // Initialize configurable default values |
| |
| uint32_t midr; |
| if (p->midr != 0x0) |
| midr = p->midr; |
| else if (highestELIs64) |
| // Cortex-A57 TRM r0p0 MIDR |
| midr = 0x410fd070; |
| else |
| // Cortex-A15 TRM r0p0 MIDR |
| midr = 0x410fc0f0; |
| |
| miscRegs[MISCREG_MIDR] = midr; |
| miscRegs[MISCREG_MIDR_EL1] = midr; |
| miscRegs[MISCREG_VPIDR] = midr; |
| |
| miscRegs[MISCREG_ID_ISAR0] = p->id_isar0; |
| miscRegs[MISCREG_ID_ISAR1] = p->id_isar1; |
| miscRegs[MISCREG_ID_ISAR2] = p->id_isar2; |
| miscRegs[MISCREG_ID_ISAR3] = p->id_isar3; |
| miscRegs[MISCREG_ID_ISAR4] = p->id_isar4; |
| miscRegs[MISCREG_ID_ISAR5] = p->id_isar5; |
| |
| miscRegs[MISCREG_ID_MMFR0] = p->id_mmfr0; |
| miscRegs[MISCREG_ID_MMFR1] = p->id_mmfr1; |
| miscRegs[MISCREG_ID_MMFR2] = p->id_mmfr2; |
| miscRegs[MISCREG_ID_MMFR3] = p->id_mmfr3; |
| |
| miscRegs[MISCREG_ID_ISAR5] = insertBits( |
| miscRegs[MISCREG_ID_ISAR5], 19, 4, |
| haveCrypto ? 0x1112 : 0x0); |
| } |
| |
| void |
| ISA::initID64(const ArmISAParams *p) |
| { |
| // Initialize configurable id registers |
| miscRegs[MISCREG_ID_AA64AFR0_EL1] = p->id_aa64afr0_el1; |
| miscRegs[MISCREG_ID_AA64AFR1_EL1] = p->id_aa64afr1_el1; |
| miscRegs[MISCREG_ID_AA64DFR0_EL1] = |
| (p->id_aa64dfr0_el1 & 0xfffffffffffff0ffULL) | |
| (p->pmu ? 0x0000000000000100ULL : 0); // Enable PMUv3 |
| |
| miscRegs[MISCREG_ID_AA64DFR1_EL1] = p->id_aa64dfr1_el1; |
| miscRegs[MISCREG_ID_AA64ISAR0_EL1] = p->id_aa64isar0_el1; |
| miscRegs[MISCREG_ID_AA64ISAR1_EL1] = p->id_aa64isar1_el1; |
| miscRegs[MISCREG_ID_AA64MMFR0_EL1] = p->id_aa64mmfr0_el1; |
| miscRegs[MISCREG_ID_AA64MMFR1_EL1] = p->id_aa64mmfr1_el1; |
| miscRegs[MISCREG_ID_AA64MMFR2_EL1] = p->id_aa64mmfr2_el1; |
| |
| miscRegs[MISCREG_ID_DFR0_EL1] = |
| (p->pmu ? 0x03000000ULL : 0); // Enable PMUv3 |
| |
| miscRegs[MISCREG_ID_DFR0] = miscRegs[MISCREG_ID_DFR0_EL1]; |
| |
| // SVE |
| miscRegs[MISCREG_ID_AA64ZFR0_EL1] = 0; // SVEver 0 |
| if (haveSecurity) { |
| miscRegs[MISCREG_ZCR_EL3] = sveVL - 1; |
| } else if (haveVirtualization) { |
| miscRegs[MISCREG_ZCR_EL2] = sveVL - 1; |
| } else { |
| miscRegs[MISCREG_ZCR_EL1] = sveVL - 1; |
| } |
| |
| // Enforce consistency with system-level settings... |
| |
| // EL3 |
| miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64PFR0_EL1], 15, 12, |
| haveSecurity ? 0x2 : 0x0); |
| // EL2 |
| miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64PFR0_EL1], 11, 8, |
| haveVirtualization ? 0x2 : 0x0); |
| // SVE |
| miscRegs[MISCREG_ID_AA64PFR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64PFR0_EL1], 35, 32, |
| haveSVE ? 0x1 : 0x0); |
| // Large ASID support |
| miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64MMFR0_EL1], 7, 4, |
| haveLargeAsid64 ? 0x2 : 0x0); |
| // Physical address size |
| miscRegs[MISCREG_ID_AA64MMFR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64MMFR0_EL1], 3, 0, |
| encodePhysAddrRange64(physAddrRange)); |
| // Crypto |
| miscRegs[MISCREG_ID_AA64ISAR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64ISAR0_EL1], 19, 4, |
| haveCrypto ? 0x1112 : 0x0); |
| // LSE |
| miscRegs[MISCREG_ID_AA64ISAR0_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64ISAR0_EL1], 23, 20, |
| haveLSE ? 0x2 : 0x0); |
| // PAN |
| miscRegs[MISCREG_ID_AA64MMFR1_EL1] = insertBits( |
| miscRegs[MISCREG_ID_AA64MMFR1_EL1], 23, 20, |
| havePAN ? 0x1 : 0x0); |
| } |
| |
| void |
| ISA::startup(ThreadContext *tc) |
| { |
| pmu->setThreadContext(tc); |
| |
| if (system) { |
| Gicv3 *gicv3 = dynamic_cast<Gicv3 *>(system->getGIC()); |
| if (gicv3) { |
| gicv3CpuInterface.reset(gicv3->getCPUInterface(tc->contextId())); |
| gicv3CpuInterface->setISA(this); |
| gicv3CpuInterface->setThreadContext(tc); |
| } |
| } |
| |
| afterStartup = true; |
| } |
| |
| void |
| ISA::takeOverFrom(ThreadContext *new_tc, ThreadContext *old_tc) |
| { |
| pmu->setThreadContext(new_tc); |
| |
| if (system && gicv3CpuInterface) { |
| gicv3CpuInterface->setISA(this); |
| gicv3CpuInterface->setThreadContext(new_tc); |
| } |
| } |
| |
| RegVal |
| ISA::readMiscRegNoEffect(int misc_reg) const |
| { |
| assert(misc_reg < NumMiscRegs); |
| |
| const auto ® = lookUpMiscReg[misc_reg]; // bit masks |
| const auto &map = getMiscIndices(misc_reg); |
| int lower = map.first, upper = map.second; |
| // NB!: apply architectural masks according to desired register, |
| // despite possibly getting value from different (mapped) register. |
| auto val = !upper ? miscRegs[lower] : ((miscRegs[lower] & mask(32)) |
| |(miscRegs[upper] << 32)); |
| if (val & reg.res0()) { |
| DPRINTF(MiscRegs, "Reading MiscReg %s with set res0 bits: %#x\n", |
| miscRegName[misc_reg], val & reg.res0()); |
| } |
| if ((val & reg.res1()) != reg.res1()) { |
| DPRINTF(MiscRegs, "Reading MiscReg %s with clear res1 bits: %#x\n", |
| miscRegName[misc_reg], (val & reg.res1()) ^ reg.res1()); |
| } |
| return (val & ~reg.raz()) | reg.rao(); // enforce raz/rao |
| } |
| |
| |
| RegVal |
| ISA::readMiscReg(int misc_reg, ThreadContext *tc) |
| { |
| CPSR cpsr = 0; |
| PCState pc = 0; |
| SCR scr = 0; |
| |
| if (misc_reg == MISCREG_CPSR) { |
| cpsr = miscRegs[misc_reg]; |
| pc = tc->pcState(); |
| cpsr.j = pc.jazelle() ? 1 : 0; |
| cpsr.t = pc.thumb() ? 1 : 0; |
| return cpsr; |
| } |
| |
| #ifndef NDEBUG |
| if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) { |
| if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL]) |
| warn("Unimplemented system register %s read.\n", |
| miscRegName[misc_reg]); |
| else |
| panic("Unimplemented system register %s read.\n", |
| miscRegName[misc_reg]); |
| } |
| #endif |
| |
| switch (unflattenMiscReg(misc_reg)) { |
| case MISCREG_HCR: |
| case MISCREG_HCR2: |
| if (!haveVirtualization) |
| return 0; |
| break; |
| case MISCREG_CPACR: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| CPACR cpacrMask = 0; |
| // Only cp10, cp11, and ase are implemented, nothing else should |
| // be readable? (straight copy from the write code) |
| cpacrMask.cp10 = ones; |
| cpacrMask.cp11 = ones; |
| cpacrMask.asedis = ones; |
| |
| // Security Extensions may limit the readability of CPACR |
| if (haveSecurity) { |
| scr = readMiscRegNoEffect(MISCREG_SCR); |
| cpsr = readMiscRegNoEffect(MISCREG_CPSR); |
| if (scr.ns && (cpsr.mode != MODE_MON) && ELIs32(tc, EL3)) { |
| NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR); |
| // NB: Skipping the full loop, here |
| if (!nsacr.cp10) cpacrMask.cp10 = 0; |
| if (!nsacr.cp11) cpacrMask.cp11 = 0; |
| } |
| } |
| RegVal val = readMiscRegNoEffect(MISCREG_CPACR); |
| val &= cpacrMask; |
| DPRINTF(MiscRegs, "Reading misc reg %s: %#x\n", |
| miscRegName[misc_reg], val); |
| return val; |
| } |
| case MISCREG_MPIDR: |
| case MISCREG_MPIDR_EL1: |
| return readMPIDR(system, tc); |
| case MISCREG_VMPIDR: |
| case MISCREG_VMPIDR_EL2: |
| // top bit defined as RES1 |
| return readMiscRegNoEffect(misc_reg) | 0x80000000; |
| case MISCREG_ID_AFR0: // not implemented, so alias MIDR |
| case MISCREG_REVIDR: // not implemented, so alias MIDR |
| case MISCREG_MIDR: |
| cpsr = readMiscRegNoEffect(MISCREG_CPSR); |
| scr = readMiscRegNoEffect(MISCREG_SCR); |
| if ((cpsr.mode == MODE_HYP) || inSecureState(scr, cpsr)) { |
| return readMiscRegNoEffect(misc_reg); |
| } else { |
| return readMiscRegNoEffect(MISCREG_VPIDR); |
| } |
| break; |
| case MISCREG_JOSCR: // Jazelle trivial implementation, RAZ/WI |
| case MISCREG_JMCR: // Jazelle trivial implementation, RAZ/WI |
| case MISCREG_JIDR: // Jazelle trivial implementation, RAZ/WI |
| case MISCREG_AIDR: // AUX ID set to 0 |
| case MISCREG_TCMTR: // No TCM's |
| return 0; |
| |
| case MISCREG_CLIDR: |
| warn_once("The clidr register always reports 0 caches.\n"); |
| warn_once("clidr LoUIS field of 0b001 to match current " |
| "ARM implementations.\n"); |
| return 0x00200000; |
| case MISCREG_CCSIDR: |
| warn_once("The ccsidr register isn't implemented and " |
| "always reads as 0.\n"); |
| break; |
| case MISCREG_CTR: // AArch32, ARMv7, top bit set |
| case MISCREG_CTR_EL0: // AArch64 |
| { |
| //all caches have the same line size in gem5 |
| //4 byte words in ARM |
| unsigned lineSizeWords = |
| tc->getSystemPtr()->cacheLineSize() / 4; |
| unsigned log2LineSizeWords = 0; |
| |
| while (lineSizeWords >>= 1) { |
| ++log2LineSizeWords; |
| } |
| |
| CTR ctr = 0; |
| //log2 of minimun i-cache line size (words) |
| ctr.iCacheLineSize = log2LineSizeWords; |
| //b11 - gem5 uses pipt |
| ctr.l1IndexPolicy = 0x3; |
| //log2 of minimum d-cache line size (words) |
| ctr.dCacheLineSize = log2LineSizeWords; |
| //log2 of max reservation size (words) |
| ctr.erg = log2LineSizeWords; |
| //log2 of max writeback size (words) |
| ctr.cwg = log2LineSizeWords; |
| //b100 - gem5 format is ARMv7 |
| ctr.format = 0x4; |
| |
| return ctr; |
| } |
| case MISCREG_ACTLR: |
| warn("Not doing anything for miscreg ACTLR\n"); |
| break; |
| |
| case MISCREG_PMXEVTYPER_PMCCFILTR: |
| case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0: |
| case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0: |
| case MISCREG_PMCR ... MISCREG_PMOVSSET: |
| return pmu->readMiscReg(misc_reg); |
| |
| case MISCREG_CPSR_Q: |
| panic("shouldn't be reading this register seperately\n"); |
| case MISCREG_FPSCR_QC: |
| return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrQcMask; |
| case MISCREG_FPSCR_EXC: |
| return readMiscRegNoEffect(MISCREG_FPSCR) & ~FpscrExcMask; |
| case MISCREG_FPSR: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| FPSCR fpscrMask = 0; |
| fpscrMask.ioc = ones; |
| fpscrMask.dzc = ones; |
| fpscrMask.ofc = ones; |
| fpscrMask.ufc = ones; |
| fpscrMask.ixc = ones; |
| fpscrMask.idc = ones; |
| fpscrMask.qc = ones; |
| fpscrMask.v = ones; |
| fpscrMask.c = ones; |
| fpscrMask.z = ones; |
| fpscrMask.n = ones; |
| return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask; |
| } |
| case MISCREG_FPCR: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| FPSCR fpscrMask = 0; |
| fpscrMask.len = ones; |
| fpscrMask.fz16 = ones; |
| fpscrMask.stride = ones; |
| fpscrMask.rMode = ones; |
| fpscrMask.fz = ones; |
| fpscrMask.dn = ones; |
| fpscrMask.ahp = ones; |
| return readMiscRegNoEffect(MISCREG_FPSCR) & (uint32_t)fpscrMask; |
| } |
| case MISCREG_NZCV: |
| { |
| CPSR cpsr = 0; |
| cpsr.nz = tc->readCCReg(CCREG_NZ); |
| cpsr.c = tc->readCCReg(CCREG_C); |
| cpsr.v = tc->readCCReg(CCREG_V); |
| return cpsr; |
| } |
| case MISCREG_DAIF: |
| { |
| CPSR cpsr = 0; |
| cpsr.daif = (uint8_t) ((CPSR) miscRegs[MISCREG_CPSR]).daif; |
| return cpsr; |
| } |
| case MISCREG_SP_EL0: |
| { |
| return tc->readIntReg(INTREG_SP0); |
| } |
| case MISCREG_SP_EL1: |
| { |
| return tc->readIntReg(INTREG_SP1); |
| } |
| case MISCREG_SP_EL2: |
| { |
| return tc->readIntReg(INTREG_SP2); |
| } |
| case MISCREG_SPSEL: |
| { |
| return miscRegs[MISCREG_CPSR] & 0x1; |
| } |
| case MISCREG_CURRENTEL: |
| { |
| return miscRegs[MISCREG_CPSR] & 0xc; |
| } |
| case MISCREG_PAN: |
| { |
| return miscRegs[MISCREG_CPSR] & 0x400000; |
| } |
| case MISCREG_L2CTLR: |
| { |
| // mostly unimplemented, just set NumCPUs field from sim and return |
| L2CTLR l2ctlr = 0; |
| // b00:1CPU to b11:4CPUs |
| l2ctlr.numCPUs = tc->getSystemPtr()->numContexts() - 1; |
| return l2ctlr; |
| } |
| case MISCREG_DBGDIDR: |
| /* For now just implement the version number. |
| * ARMv7, v7.1 Debug architecture (0b0101 --> 0x5) |
| */ |
| return 0x5 << 16; |
| case MISCREG_DBGDSCRint: |
| return 0; |
| case MISCREG_ISR: |
| { |
| auto ic = dynamic_cast<ArmISA::Interrupts *>( |
| tc->getCpuPtr()->getInterruptController(tc->threadId())); |
| return ic->getISR( |
| readMiscRegNoEffect(MISCREG_HCR), |
| readMiscRegNoEffect(MISCREG_CPSR), |
| readMiscRegNoEffect(MISCREG_SCR)); |
| } |
| case MISCREG_ISR_EL1: |
| { |
| auto ic = dynamic_cast<ArmISA::Interrupts *>( |
| tc->getCpuPtr()->getInterruptController(tc->threadId())); |
| return ic->getISR( |
| readMiscRegNoEffect(MISCREG_HCR_EL2), |
| readMiscRegNoEffect(MISCREG_CPSR), |
| readMiscRegNoEffect(MISCREG_SCR_EL3)); |
| } |
| case MISCREG_DCZID_EL0: |
| return 0x04; // DC ZVA clear 64-byte chunks |
| case MISCREG_HCPTR: |
| { |
| RegVal val = readMiscRegNoEffect(misc_reg); |
| // The trap bit associated with CP14 is defined as RAZ |
| val &= ~(1 << 14); |
| // If a CP bit in NSACR is 0 then the corresponding bit in |
| // HCPTR is RAO/WI |
| bool secure_lookup = haveSecurity && |
| inSecureState(readMiscRegNoEffect(MISCREG_SCR), |
| readMiscRegNoEffect(MISCREG_CPSR)); |
| if (!secure_lookup) { |
| RegVal mask = readMiscRegNoEffect(MISCREG_NSACR); |
| val |= (mask ^ 0x7FFF) & 0xBFFF; |
| } |
| // Set the bits for unimplemented coprocessors to RAO/WI |
| val |= 0x33FF; |
| return (val); |
| } |
| case MISCREG_HDFAR: // alias for secure DFAR |
| return readMiscRegNoEffect(MISCREG_DFAR_S); |
| case MISCREG_HIFAR: // alias for secure IFAR |
| return readMiscRegNoEffect(MISCREG_IFAR_S); |
| |
| case MISCREG_ID_PFR0: |
| // !ThumbEE | !Jazelle | Thumb | ARM |
| return 0x00000031; |
| case MISCREG_ID_PFR1: |
| { // Timer | Virti | !M Profile | TrustZone | ARMv4 |
| bool haveTimer = (system->getGenericTimer() != NULL); |
| return 0x00000001 |
| | (haveSecurity ? 0x00000010 : 0x0) |
| | (haveVirtualization ? 0x00001000 : 0x0) |
| | (haveTimer ? 0x00010000 : 0x0); |
| } |
| case MISCREG_ID_AA64PFR0_EL1: |
| return 0x0000000000000002 | // AArch{64,32} supported at EL0 |
| 0x0000000000000020 | // EL1 |
| (haveVirtualization ? 0x0000000000000200 : 0) | // EL2 |
| (haveSecurity ? 0x0000000000002000 : 0) | // EL3 |
| (haveSVE ? 0x0000000100000000 : 0) | // SVE |
| (gicv3CpuInterface ? 0x0000000001000000 : 0); |
| case MISCREG_ID_AA64PFR1_EL1: |
| return 0; // bits [63:0] RES0 (reserved for future use) |
| |
| // Generic Timer registers |
| case MISCREG_CNTFRQ ... MISCREG_CNTVOFF: |
| case MISCREG_CNTFRQ_EL0 ... MISCREG_CNTVOFF_EL2: |
| return getGenericTimer(tc).readMiscReg(misc_reg); |
| |
| case MISCREG_ICC_AP0R0 ... MISCREG_ICH_LRC15: |
| case MISCREG_ICC_PMR_EL1 ... MISCREG_ICC_IGRPEN1_EL3: |
| case MISCREG_ICH_AP0R0_EL2 ... MISCREG_ICH_LR15_EL2: |
| return getGICv3CPUInterface(tc).readMiscReg(misc_reg); |
| |
| default: |
| break; |
| |
| } |
| return readMiscRegNoEffect(misc_reg); |
| } |
| |
| void |
| ISA::setMiscRegNoEffect(int misc_reg, RegVal val) |
| { |
| assert(misc_reg < NumMiscRegs); |
| |
| const auto ® = lookUpMiscReg[misc_reg]; // bit masks |
| const auto &map = getMiscIndices(misc_reg); |
| int lower = map.first, upper = map.second; |
| |
| auto v = (val & ~reg.wi()) | reg.rao(); |
| if (upper > 0) { |
| miscRegs[lower] = bits(v, 31, 0); |
| miscRegs[upper] = bits(v, 63, 32); |
| DPRINTF(MiscRegs, "Writing to misc reg %d (%d:%d) : %#x\n", |
| misc_reg, lower, upper, v); |
| } else { |
| miscRegs[lower] = v; |
| DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n", |
| misc_reg, lower, v); |
| } |
| } |
| |
| void |
| ISA::setMiscReg(int misc_reg, RegVal val, ThreadContext *tc) |
| { |
| |
| RegVal newVal = val; |
| bool secure_lookup; |
| SCR scr; |
| |
| if (misc_reg == MISCREG_CPSR) { |
| updateRegMap(val); |
| |
| |
| CPSR old_cpsr = miscRegs[MISCREG_CPSR]; |
| int old_mode = old_cpsr.mode; |
| CPSR cpsr = val; |
| if (old_mode != cpsr.mode || cpsr.il != old_cpsr.il) { |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| } |
| |
| if (cpsr.pan != old_cpsr.pan) { |
| getDTBPtr(tc)->invalidateMiscReg(); |
| } |
| |
| DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n", |
| miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode); |
| PCState pc = tc->pcState(); |
| pc.nextThumb(cpsr.t); |
| pc.nextJazelle(cpsr.j); |
| pc.illegalExec(cpsr.il == 1); |
| |
| tc->getDecoderPtr()->setSveLen((getCurSveVecLenInBits(tc) >> 7) - 1); |
| |
| // Follow slightly different semantics if a CheckerCPU object |
| // is connected |
| CheckerCPU *checker = tc->getCheckerCpuPtr(); |
| if (checker) { |
| tc->pcStateNoRecord(pc); |
| } else { |
| tc->pcState(pc); |
| } |
| } else { |
| #ifndef NDEBUG |
| if (!miscRegInfo[misc_reg][MISCREG_IMPLEMENTED]) { |
| if (miscRegInfo[misc_reg][MISCREG_WARN_NOT_FAIL]) |
| warn("Unimplemented system register %s write with %#x.\n", |
| miscRegName[misc_reg], val); |
| else |
| panic("Unimplemented system register %s write with %#x.\n", |
| miscRegName[misc_reg], val); |
| } |
| #endif |
| switch (unflattenMiscReg(misc_reg)) { |
| case MISCREG_CPACR: |
| { |
| |
| const uint32_t ones = (uint32_t)(-1); |
| CPACR cpacrMask = 0; |
| // Only cp10, cp11, and ase are implemented, nothing else should |
| // be writable |
| cpacrMask.cp10 = ones; |
| cpacrMask.cp11 = ones; |
| cpacrMask.asedis = ones; |
| |
| // Security Extensions may limit the writability of CPACR |
| if (haveSecurity) { |
| scr = readMiscRegNoEffect(MISCREG_SCR); |
| CPSR cpsr = readMiscRegNoEffect(MISCREG_CPSR); |
| if (scr.ns && (cpsr.mode != MODE_MON) && ELIs32(tc, EL3)) { |
| NSACR nsacr = readMiscRegNoEffect(MISCREG_NSACR); |
| // NB: Skipping the full loop, here |
| if (!nsacr.cp10) cpacrMask.cp10 = 0; |
| if (!nsacr.cp11) cpacrMask.cp11 = 0; |
| } |
| } |
| |
| RegVal old_val = readMiscRegNoEffect(MISCREG_CPACR); |
| newVal &= cpacrMask; |
| newVal |= old_val & ~cpacrMask; |
| DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", |
| miscRegName[misc_reg], newVal); |
| } |
| break; |
| case MISCREG_CPACR_EL1: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| CPACR cpacrMask = 0; |
| cpacrMask.tta = ones; |
| cpacrMask.fpen = ones; |
| if (haveSVE) { |
| cpacrMask.zen = ones; |
| } |
| newVal &= cpacrMask; |
| DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", |
| miscRegName[misc_reg], newVal); |
| } |
| break; |
| case MISCREG_CPTR_EL2: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| CPTR cptrMask = 0; |
| cptrMask.tcpac = ones; |
| cptrMask.tta = ones; |
| cptrMask.tfp = ones; |
| if (haveSVE) { |
| cptrMask.tz = ones; |
| } |
| newVal &= cptrMask; |
| cptrMask = 0; |
| cptrMask.res1_13_12_el2 = ones; |
| cptrMask.res1_7_0_el2 = ones; |
| if (!haveSVE) { |
| cptrMask.res1_8_el2 = ones; |
| } |
| cptrMask.res1_9_el2 = ones; |
| newVal |= cptrMask; |
| DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", |
| miscRegName[misc_reg], newVal); |
| } |
| break; |
| case MISCREG_CPTR_EL3: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| CPTR cptrMask = 0; |
| cptrMask.tcpac = ones; |
| cptrMask.tta = ones; |
| cptrMask.tfp = ones; |
| if (haveSVE) { |
| cptrMask.ez = ones; |
| } |
| newVal &= cptrMask; |
| DPRINTF(MiscRegs, "Writing misc reg %s: %#x\n", |
| miscRegName[misc_reg], newVal); |
| } |
| break; |
| case MISCREG_CSSELR: |
| warn_once("The csselr register isn't implemented.\n"); |
| return; |
| |
| case MISCREG_DC_ZVA_Xt: |
| warn("Calling DC ZVA! Not Implemeted! Expect WEIRD results\n"); |
| return; |
| |
| case MISCREG_FPSCR: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| FPSCR fpscrMask = 0; |
| fpscrMask.ioc = ones; |
| fpscrMask.dzc = ones; |
| fpscrMask.ofc = ones; |
| fpscrMask.ufc = ones; |
| fpscrMask.ixc = ones; |
| fpscrMask.idc = ones; |
| fpscrMask.ioe = ones; |
| fpscrMask.dze = ones; |
| fpscrMask.ofe = ones; |
| fpscrMask.ufe = ones; |
| fpscrMask.ixe = ones; |
| fpscrMask.ide = ones; |
| fpscrMask.len = ones; |
| fpscrMask.fz16 = ones; |
| fpscrMask.stride = ones; |
| fpscrMask.rMode = ones; |
| fpscrMask.fz = ones; |
| fpscrMask.dn = ones; |
| fpscrMask.ahp = ones; |
| fpscrMask.qc = ones; |
| fpscrMask.v = ones; |
| fpscrMask.c = ones; |
| fpscrMask.z = ones; |
| fpscrMask.n = ones; |
| newVal = (newVal & (uint32_t)fpscrMask) | |
| (readMiscRegNoEffect(MISCREG_FPSCR) & |
| ~(uint32_t)fpscrMask); |
| tc->getDecoderPtr()->setContext(newVal); |
| } |
| break; |
| case MISCREG_FPSR: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| FPSCR fpscrMask = 0; |
| fpscrMask.ioc = ones; |
| fpscrMask.dzc = ones; |
| fpscrMask.ofc = ones; |
| fpscrMask.ufc = ones; |
| fpscrMask.ixc = ones; |
| fpscrMask.idc = ones; |
| fpscrMask.qc = ones; |
| fpscrMask.v = ones; |
| fpscrMask.c = ones; |
| fpscrMask.z = ones; |
| fpscrMask.n = ones; |
| newVal = (newVal & (uint32_t)fpscrMask) | |
| (readMiscRegNoEffect(MISCREG_FPSCR) & |
| ~(uint32_t)fpscrMask); |
| misc_reg = MISCREG_FPSCR; |
| } |
| break; |
| case MISCREG_FPCR: |
| { |
| const uint32_t ones = (uint32_t)(-1); |
| FPSCR fpscrMask = 0; |
| fpscrMask.len = ones; |
| fpscrMask.fz16 = ones; |
| fpscrMask.stride = ones; |
| fpscrMask.rMode = ones; |
| fpscrMask.fz = ones; |
| fpscrMask.dn = ones; |
| fpscrMask.ahp = ones; |
| newVal = (newVal & (uint32_t)fpscrMask) | |
| (readMiscRegNoEffect(MISCREG_FPSCR) & |
| ~(uint32_t)fpscrMask); |
| misc_reg = MISCREG_FPSCR; |
| } |
| break; |
| case MISCREG_CPSR_Q: |
| { |
| assert(!(newVal & ~CpsrMaskQ)); |
| newVal = readMiscRegNoEffect(MISCREG_CPSR) | newVal; |
| misc_reg = MISCREG_CPSR; |
| } |
| break; |
| case MISCREG_FPSCR_QC: |
| { |
| newVal = readMiscRegNoEffect(MISCREG_FPSCR) | |
| (newVal & FpscrQcMask); |
| misc_reg = MISCREG_FPSCR; |
| } |
| break; |
| case MISCREG_FPSCR_EXC: |
| { |
| newVal = readMiscRegNoEffect(MISCREG_FPSCR) | |
| (newVal & FpscrExcMask); |
| misc_reg = MISCREG_FPSCR; |
| } |
| break; |
| case MISCREG_FPEXC: |
| { |
| // vfpv3 architecture, section B.6.1 of DDI04068 |
| // bit 29 - valid only if fpexc[31] is 0 |
| const uint32_t fpexcMask = 0x60000000; |
| newVal = (newVal & fpexcMask) | |
| (readMiscRegNoEffect(MISCREG_FPEXC) & ~fpexcMask); |
| } |
| break; |
| case MISCREG_HCR: |
| case MISCREG_HCR2: |
| if (!haveVirtualization) |
| return; |
| break; |
| case MISCREG_IFSR: |
| { |
| // ARM ARM (ARM DDI 0406C.b) B4.1.96 |
| const uint32_t ifsrMask = |
| mask(31, 13) | mask(11, 11) | mask(8, 6); |
| newVal = newVal & ~ifsrMask; |
| } |
| break; |
| case MISCREG_DFSR: |
| { |
| // ARM ARM (ARM DDI 0406C.b) B4.1.52 |
| const uint32_t dfsrMask = mask(31, 14) | mask(8, 8); |
| newVal = newVal & ~dfsrMask; |
| } |
| break; |
| case MISCREG_AMAIR0: |
| case MISCREG_AMAIR1: |
| { |
| // ARM ARM (ARM DDI 0406C.b) B4.1.5 |
| // Valid only with LPAE |
| if (!haveLPAE) |
| return; |
| DPRINTF(MiscRegs, "Writing AMAIR: %#x\n", newVal); |
| } |
| break; |
| case MISCREG_SCR: |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| break; |
| case MISCREG_SCTLR: |
| { |
| DPRINTF(MiscRegs, "Writing SCTLR: %#x\n", newVal); |
| scr = readMiscRegNoEffect(MISCREG_SCR); |
| |
| MiscRegIndex sctlr_idx; |
| if (haveSecurity && !highestELIs64 && !scr.ns) { |
| sctlr_idx = MISCREG_SCTLR_S; |
| } else { |
| sctlr_idx = MISCREG_SCTLR_NS; |
| } |
| |
| SCTLR sctlr = miscRegs[sctlr_idx]; |
| SCTLR new_sctlr = newVal; |
| new_sctlr.nmfi = ((bool)sctlr.nmfi) && !haveVirtualization; |
| miscRegs[sctlr_idx] = (RegVal)new_sctlr; |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| } |
| case MISCREG_MIDR: |
| case MISCREG_ID_PFR0: |
| case MISCREG_ID_PFR1: |
| case MISCREG_ID_DFR0: |
| case MISCREG_ID_MMFR0: |
| case MISCREG_ID_MMFR1: |
| case MISCREG_ID_MMFR2: |
| case MISCREG_ID_MMFR3: |
| case MISCREG_ID_ISAR0: |
| case MISCREG_ID_ISAR1: |
| case MISCREG_ID_ISAR2: |
| case MISCREG_ID_ISAR3: |
| case MISCREG_ID_ISAR4: |
| case MISCREG_ID_ISAR5: |
| |
| case MISCREG_MPIDR: |
| case MISCREG_FPSID: |
| case MISCREG_TLBTR: |
| case MISCREG_MVFR0: |
| case MISCREG_MVFR1: |
| |
| case MISCREG_ID_AA64AFR0_EL1: |
| case MISCREG_ID_AA64AFR1_EL1: |
| case MISCREG_ID_AA64DFR0_EL1: |
| case MISCREG_ID_AA64DFR1_EL1: |
| case MISCREG_ID_AA64ISAR0_EL1: |
| case MISCREG_ID_AA64ISAR1_EL1: |
| case MISCREG_ID_AA64MMFR0_EL1: |
| case MISCREG_ID_AA64MMFR1_EL1: |
| case MISCREG_ID_AA64MMFR2_EL1: |
| case MISCREG_ID_AA64PFR0_EL1: |
| case MISCREG_ID_AA64PFR1_EL1: |
| // ID registers are constants. |
| return; |
| |
| // TLB Invalidate All |
| case MISCREG_TLBIALL: // TLBI all entries, EL0&1, |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate All, Inner Shareable |
| case MISCREG_TLBIALLIS: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // Instruction TLB Invalidate All |
| case MISCREG_ITLBIALL: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| ITLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); |
| tlbiOp(tc); |
| return; |
| } |
| // Data TLB Invalidate All |
| case MISCREG_DTLBIALL: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| DTLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate by VA |
| // mcr tlbimval(is) is invalidating all matching entries |
| // regardless of the level of lookup, since in gem5 we cache |
| // in the tlb the last level of lookup only. |
| case MISCREG_TLBIMVA: |
| case MISCREG_TLBIMVAL: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVA tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| mbits(newVal, 31, 12), |
| bits(newVal, 7,0)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate by VA, Inner Shareable |
| case MISCREG_TLBIMVAIS: |
| case MISCREG_TLBIMVALIS: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVA tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| mbits(newVal, 31, 12), |
| bits(newVal, 7,0)); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // TLB Invalidate by ASID match |
| case MISCREG_TLBIASID: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIASID tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| bits(newVal, 7,0)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate by ASID match, Inner Shareable |
| case MISCREG_TLBIASIDIS: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIASID tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| bits(newVal, 7,0)); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // mcr tlbimvaal(is) is invalidating all matching entries |
| // regardless of the level of lookup, since in gem5 we cache |
| // in the tlb the last level of lookup only. |
| // TLB Invalidate by VA, All ASID |
| case MISCREG_TLBIMVAA: |
| case MISCREG_TLBIMVAAL: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, |
| mbits(newVal, 31,12)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate by VA, All ASID, Inner Shareable |
| case MISCREG_TLBIMVAAIS: |
| case MISCREG_TLBIMVAALIS: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, |
| mbits(newVal, 31,12)); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // mcr tlbimvalh(is) is invalidating all matching entries |
| // regardless of the level of lookup, since in gem5 we cache |
| // in the tlb the last level of lookup only. |
| // TLB Invalidate by VA, Hyp mode |
| case MISCREG_TLBIMVAH: |
| case MISCREG_TLBIMVALH: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVAA tlbiOp(EL2, haveSecurity && !scr.ns, |
| mbits(newVal, 31,12)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate by VA, Hyp mode, Inner Shareable |
| case MISCREG_TLBIMVAHIS: |
| case MISCREG_TLBIMVALHIS: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVAA tlbiOp(EL2, haveSecurity && !scr.ns, |
| mbits(newVal, 31,12)); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // mcr tlbiipas2l(is) is invalidating all matching entries |
| // regardless of the level of lookup, since in gem5 we cache |
| // in the tlb the last level of lookup only. |
| // TLB Invalidate by Intermediate Physical Address, Stage 2 |
| case MISCREG_TLBIIPAS2: |
| case MISCREG_TLBIIPAS2L: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIIPA tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 35, 0)) << 12); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate by Intermediate Physical Address, Stage 2, |
| // Inner Shareable |
| case MISCREG_TLBIIPAS2IS: |
| case MISCREG_TLBIIPAS2LIS: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIIPA tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 35, 0)) << 12); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // Instruction TLB Invalidate by VA |
| case MISCREG_ITLBIMVA: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| ITLBIMVA tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| mbits(newVal, 31, 12), |
| bits(newVal, 7,0)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // Data TLB Invalidate by VA |
| case MISCREG_DTLBIMVA: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| DTLBIMVA tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| mbits(newVal, 31, 12), |
| bits(newVal, 7,0)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // Instruction TLB Invalidate by ASID match |
| case MISCREG_ITLBIASID: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| ITLBIASID tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| bits(newVal, 7,0)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // Data TLB Invalidate by ASID match |
| case MISCREG_DTLBIASID: |
| { |
| assert32(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| DTLBIASID tlbiOp(EL1, |
| haveSecurity && !scr.ns, |
| bits(newVal, 7,0)); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate All, Non-Secure Non-Hyp |
| case MISCREG_TLBIALLNSNH: |
| { |
| assert32(tc); |
| |
| TLBIALLN tlbiOp(EL1); |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate All, Non-Secure Non-Hyp, Inner Shareable |
| case MISCREG_TLBIALLNSNHIS: |
| { |
| assert32(tc); |
| |
| TLBIALLN tlbiOp(EL1); |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // TLB Invalidate All, Hyp mode |
| case MISCREG_TLBIALLH: |
| { |
| assert32(tc); |
| |
| TLBIALLN tlbiOp(EL2); |
| tlbiOp(tc); |
| return; |
| } |
| // TLB Invalidate All, Hyp mode, Inner Shareable |
| case MISCREG_TLBIALLHIS: |
| { |
| assert32(tc); |
| |
| TLBIALLN tlbiOp(EL2); |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate All, EL3 |
| case MISCREG_TLBI_ALLE3: |
| { |
| assert64(tc); |
| |
| TLBIALL tlbiOp(EL3, true); |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate All, EL3, Inner Shareable |
| case MISCREG_TLBI_ALLE3IS: |
| { |
| assert64(tc); |
| |
| TLBIALL tlbiOp(EL3, true); |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate All, EL2, Inner Shareable |
| case MISCREG_TLBI_ALLE2: |
| case MISCREG_TLBI_ALLE2IS: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIALL tlbiOp(EL2, haveSecurity && !scr.ns); |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate All, EL1 |
| case MISCREG_TLBI_ALLE1: |
| case MISCREG_TLBI_VMALLE1: |
| case MISCREG_TLBI_VMALLS12E1: |
| // @todo: handle VMID and stage 2 to enable Virtualization |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate All, EL1, Inner Shareable |
| case MISCREG_TLBI_ALLE1IS: |
| case MISCREG_TLBI_VMALLE1IS: |
| case MISCREG_TLBI_VMALLS12E1IS: |
| // @todo: handle VMID and stage 2 to enable Virtualization |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIALL tlbiOp(EL1, haveSecurity && !scr.ns); |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // VAEx(IS) and VALEx(IS) are the same because TLBs |
| // only store entries |
| // from the last level of translation table walks |
| // @todo: handle VMID to enable Virtualization |
| // AArch64 TLB Invalidate by VA, EL3 |
| case MISCREG_TLBI_VAE3_Xt: |
| case MISCREG_TLBI_VALE3_Xt: |
| { |
| assert64(tc); |
| |
| TLBIMVA tlbiOp(EL3, true, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12, |
| 0xbeef); |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by VA, EL3, Inner Shareable |
| case MISCREG_TLBI_VAE3IS_Xt: |
| case MISCREG_TLBI_VALE3IS_Xt: |
| { |
| assert64(tc); |
| |
| TLBIMVA tlbiOp(EL3, true, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12, |
| 0xbeef); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by VA, EL2 |
| case MISCREG_TLBI_VAE2_Xt: |
| case MISCREG_TLBI_VALE2_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12, |
| 0xbeef); |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by VA, EL2, Inner Shareable |
| case MISCREG_TLBI_VAE2IS_Xt: |
| case MISCREG_TLBI_VALE2IS_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVA tlbiOp(EL2, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12, |
| 0xbeef); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by VA, EL1 |
| case MISCREG_TLBI_VAE1_Xt: |
| case MISCREG_TLBI_VALE1_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : |
| bits(newVal, 55, 48); |
| |
| TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12, |
| asid); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by VA, EL1, Inner Shareable |
| case MISCREG_TLBI_VAE1IS_Xt: |
| case MISCREG_TLBI_VALE1IS_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : |
| bits(newVal, 55, 48); |
| |
| TLBIMVA tlbiOp(EL1, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12, |
| asid); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by ASID, EL1 |
| // @todo: handle VMID to enable Virtualization |
| case MISCREG_TLBI_ASIDE1_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : |
| bits(newVal, 55, 48); |
| |
| TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid); |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by ASID, EL1, Inner Shareable |
| case MISCREG_TLBI_ASIDE1IS_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| auto asid = haveLargeAsid64 ? bits(newVal, 63, 48) : |
| bits(newVal, 55, 48); |
| |
| TLBIASID tlbiOp(EL1, haveSecurity && !scr.ns, asid); |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // VAAE1(IS) and VAALE1(IS) are the same because TLBs only store |
| // entries from the last level of translation table walks |
| // AArch64 TLB Invalidate by VA, All ASID, EL1 |
| case MISCREG_TLBI_VAAE1_Xt: |
| case MISCREG_TLBI_VAALE1_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by VA, All ASID, EL1, Inner Shareable |
| case MISCREG_TLBI_VAAE1IS_Xt: |
| case MISCREG_TLBI_VAALE1IS_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIMVAA tlbiOp(EL1, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 43, 0)) << 12); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by Intermediate Physical Address, |
| // Stage 2, EL1 |
| case MISCREG_TLBI_IPAS2E1_Xt: |
| case MISCREG_TLBI_IPAS2LE1_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 35, 0)) << 12); |
| |
| tlbiOp(tc); |
| return; |
| } |
| // AArch64 TLB Invalidate by Intermediate Physical Address, |
| // Stage 2, EL1, Inner Shareable |
| case MISCREG_TLBI_IPAS2E1IS_Xt: |
| case MISCREG_TLBI_IPAS2LE1IS_Xt: |
| { |
| assert64(tc); |
| scr = readMiscReg(MISCREG_SCR, tc); |
| |
| TLBIIPA tlbiOp(EL1, haveSecurity && !scr.ns, |
| static_cast<Addr>(bits(newVal, 35, 0)) << 12); |
| |
| tlbiOp.broadcast(tc); |
| return; |
| } |
| case MISCREG_ACTLR: |
| warn("Not doing anything for write of miscreg ACTLR\n"); |
| break; |
| |
| case MISCREG_PMXEVTYPER_PMCCFILTR: |
| case MISCREG_PMINTENSET_EL1 ... MISCREG_PMOVSSET_EL0: |
| case MISCREG_PMEVCNTR0_EL0 ... MISCREG_PMEVTYPER5_EL0: |
| case MISCREG_PMCR ... MISCREG_PMOVSSET: |
| pmu->setMiscReg(misc_reg, newVal); |
| break; |
| |
| |
| case MISCREG_HSTR: // TJDBX, now redifined to be RES0 |
| { |
| HSTR hstrMask = 0; |
| hstrMask.tjdbx = 1; |
| newVal &= ~((uint32_t) hstrMask); |
| break; |
| } |
| case MISCREG_HCPTR: |
| { |
| // If a CP bit in NSACR is 0 then the corresponding bit in |
| // HCPTR is RAO/WI. Same applies to NSASEDIS |
| secure_lookup = haveSecurity && |
| inSecureState(readMiscRegNoEffect(MISCREG_SCR), |
| readMiscRegNoEffect(MISCREG_CPSR)); |
| if (!secure_lookup) { |
| RegVal oldValue = readMiscRegNoEffect(MISCREG_HCPTR); |
| RegVal mask = |
| (readMiscRegNoEffect(MISCREG_NSACR) ^ 0x7FFF) & 0xBFFF; |
| newVal = (newVal & ~mask) | (oldValue & mask); |
| } |
| break; |
| } |
| case MISCREG_HDFAR: // alias for secure DFAR |
| misc_reg = MISCREG_DFAR_S; |
| break; |
| case MISCREG_HIFAR: // alias for secure IFAR |
| misc_reg = MISCREG_IFAR_S; |
| break; |
| case MISCREG_ATS1CPR: |
| case MISCREG_ATS1CPW: |
| case MISCREG_ATS1CUR: |
| case MISCREG_ATS1CUW: |
| case MISCREG_ATS12NSOPR: |
| case MISCREG_ATS12NSOPW: |
| case MISCREG_ATS12NSOUR: |
| case MISCREG_ATS12NSOUW: |
| case MISCREG_ATS1HR: |
| case MISCREG_ATS1HW: |
| { |
| Request::Flags flags = 0; |
| BaseTLB::Mode mode = BaseTLB::Read; |
| TLB::ArmTranslationType tranType = TLB::NormalTran; |
| Fault fault; |
| switch(misc_reg) { |
| case MISCREG_ATS1CPR: |
| tranType = TLB::S1CTran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_ATS1CPW: |
| tranType = TLB::S1CTran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_ATS1CUR: |
| flags = TLB::UserMode; |
| tranType = TLB::S1CTran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_ATS1CUW: |
| flags = TLB::UserMode; |
| tranType = TLB::S1CTran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_ATS12NSOPR: |
| if (!haveSecurity) |
| panic("Security Extensions required for ATS12NSOPR"); |
| tranType = TLB::S1S2NsTran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_ATS12NSOPW: |
| if (!haveSecurity) |
| panic("Security Extensions required for ATS12NSOPW"); |
| tranType = TLB::S1S2NsTran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_ATS12NSOUR: |
| if (!haveSecurity) |
| panic("Security Extensions required for ATS12NSOUR"); |
| flags = TLB::UserMode; |
| tranType = TLB::S1S2NsTran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_ATS12NSOUW: |
| if (!haveSecurity) |
| panic("Security Extensions required for ATS12NSOUW"); |
| flags = TLB::UserMode; |
| tranType = TLB::S1S2NsTran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_ATS1HR: // only really useful from secure mode. |
| tranType = TLB::HypMode; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_ATS1HW: |
| tranType = TLB::HypMode; |
| mode = BaseTLB::Write; |
| break; |
| } |
| // If we're in timing mode then doing the translation in |
| // functional mode then we're slightly distorting performance |
| // results obtained from simulations. The translation should be |
| // done in the same mode the core is running in. NOTE: This |
| // can't be an atomic translation because that causes problems |
| // with unexpected atomic snoop requests. |
| warn("Translating via %s in functional mode! Fix Me!\n", |
| miscRegName[misc_reg]); |
| |
| auto req = std::make_shared<Request>( |
| val, 0, flags, Request::funcMasterId, |
| tc->pcState().pc(), tc->contextId()); |
| |
| fault = getDTBPtr(tc)->translateFunctional( |
| req, tc, mode, tranType); |
| |
| TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); |
| HCR hcr = readMiscRegNoEffect(MISCREG_HCR); |
| |
| RegVal newVal; |
| if (fault == NoFault) { |
| Addr paddr = req->getPaddr(); |
| if (haveLPAE && (ttbcr.eae || tranType & TLB::HypMode || |
| ((tranType & TLB::S1S2NsTran) && hcr.vm) )) { |
| newVal = (paddr & mask(39, 12)) | |
| (getDTBPtr(tc)->getAttr()); |
| } else { |
| newVal = (paddr & 0xfffff000) | |
| (getDTBPtr(tc)->getAttr()); |
| } |
| DPRINTF(MiscRegs, |
| "MISCREG: Translated addr 0x%08x: PAR: 0x%08x\n", |
| val, newVal); |
| } else { |
| ArmFault *armFault = static_cast<ArmFault *>(fault.get()); |
| armFault->update(tc); |
| // Set fault bit and FSR |
| FSR fsr = armFault->getFsr(tc); |
| |
| newVal = ((fsr >> 9) & 1) << 11; |
| if (newVal) { |
| // LPAE - rearange fault status |
| newVal |= ((fsr >> 0) & 0x3f) << 1; |
| } else { |
| // VMSA - rearange fault status |
| newVal |= ((fsr >> 0) & 0xf) << 1; |
| newVal |= ((fsr >> 10) & 0x1) << 5; |
| newVal |= ((fsr >> 12) & 0x1) << 6; |
| } |
| newVal |= 0x1; // F bit |
| newVal |= ((armFault->iss() >> 7) & 0x1) << 8; |
| newVal |= armFault->isStage2() ? 0x200 : 0; |
| DPRINTF(MiscRegs, |
| "MISCREG: Translated addr 0x%08x fault fsr %#x: PAR: 0x%08x\n", |
| val, fsr, newVal); |
| } |
| setMiscRegNoEffect(MISCREG_PAR, newVal); |
| return; |
| } |
| case MISCREG_TTBCR: |
| { |
| TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); |
| const uint32_t ones = (uint32_t)(-1); |
| TTBCR ttbcrMask = 0; |
| TTBCR ttbcrNew = newVal; |
| |
| // ARM DDI 0406C.b, ARMv7-32 |
| ttbcrMask.n = ones; // T0SZ |
| if (haveSecurity) { |
| ttbcrMask.pd0 = ones; |
| ttbcrMask.pd1 = ones; |
| } |
| ttbcrMask.epd0 = ones; |
| ttbcrMask.irgn0 = ones; |
| ttbcrMask.orgn0 = ones; |
| ttbcrMask.sh0 = ones; |
| ttbcrMask.ps = ones; // T1SZ |
| ttbcrMask.a1 = ones; |
| ttbcrMask.epd1 = ones; |
| ttbcrMask.irgn1 = ones; |
| ttbcrMask.orgn1 = ones; |
| ttbcrMask.sh1 = ones; |
| if (haveLPAE) |
| ttbcrMask.eae = ones; |
| |
| if (haveLPAE && ttbcrNew.eae) { |
| newVal = newVal & ttbcrMask; |
| } else { |
| newVal = (newVal & ttbcrMask) | (ttbcr & (~ttbcrMask)); |
| } |
| // Invalidate TLB MiscReg |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| break; |
| } |
| case MISCREG_TTBR0: |
| case MISCREG_TTBR1: |
| { |
| TTBCR ttbcr = readMiscRegNoEffect(MISCREG_TTBCR); |
| if (haveLPAE) { |
| if (ttbcr.eae) { |
| // ARMv7 bit 63-56, 47-40 reserved, UNK/SBZP |
| // ARMv8 AArch32 bit 63-56 only |
| uint64_t ttbrMask = mask(63,56) | mask(47,40); |
| newVal = (newVal & (~ttbrMask)); |
| } |
| } |
| // Invalidate TLB MiscReg |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| break; |
| } |
| case MISCREG_SCTLR_EL1: |
| case MISCREG_CONTEXTIDR: |
| case MISCREG_PRRR: |
| case MISCREG_NMRR: |
| case MISCREG_MAIR0: |
| case MISCREG_MAIR1: |
| case MISCREG_DACR: |
| case MISCREG_VTTBR: |
| case MISCREG_SCR_EL3: |
| case MISCREG_HCR_EL2: |
| case MISCREG_TCR_EL1: |
| case MISCREG_TCR_EL2: |
| case MISCREG_TCR_EL3: |
| case MISCREG_SCTLR_EL2: |
| case MISCREG_SCTLR_EL3: |
| case MISCREG_HSCTLR: |
| case MISCREG_TTBR0_EL1: |
| case MISCREG_TTBR1_EL1: |
| case MISCREG_TTBR0_EL2: |
| case MISCREG_TTBR1_EL2: |
| case MISCREG_TTBR0_EL3: |
| getITBPtr(tc)->invalidateMiscReg(); |
| getDTBPtr(tc)->invalidateMiscReg(); |
| break; |
| case MISCREG_NZCV: |
| { |
| CPSR cpsr = val; |
| |
| tc->setCCReg(CCREG_NZ, cpsr.nz); |
| tc->setCCReg(CCREG_C, cpsr.c); |
| tc->setCCReg(CCREG_V, cpsr.v); |
| } |
| break; |
| case MISCREG_DAIF: |
| { |
| CPSR cpsr = miscRegs[MISCREG_CPSR]; |
| cpsr.daif = (uint8_t) ((CPSR) newVal).daif; |
| newVal = cpsr; |
| misc_reg = MISCREG_CPSR; |
| } |
| break; |
| case MISCREG_SP_EL0: |
| tc->setIntReg(INTREG_SP0, newVal); |
| break; |
| case MISCREG_SP_EL1: |
| tc->setIntReg(INTREG_SP1, newVal); |
| break; |
| case MISCREG_SP_EL2: |
| tc->setIntReg(INTREG_SP2, newVal); |
| break; |
| case MISCREG_SPSEL: |
| { |
| CPSR cpsr = miscRegs[MISCREG_CPSR]; |
| cpsr.sp = (uint8_t) ((CPSR) newVal).sp; |
| newVal = cpsr; |
| misc_reg = MISCREG_CPSR; |
| } |
| break; |
| case MISCREG_CURRENTEL: |
| { |
| CPSR cpsr = miscRegs[MISCREG_CPSR]; |
| cpsr.el = (uint8_t) ((CPSR) newVal).el; |
| newVal = cpsr; |
| misc_reg = MISCREG_CPSR; |
| } |
| break; |
| case MISCREG_PAN: |
| { |
| // PAN is affecting data accesses |
| getDTBPtr(tc)->invalidateMiscReg(); |
| |
| CPSR cpsr = miscRegs[MISCREG_CPSR]; |
| cpsr.pan = (uint8_t) ((CPSR) newVal).pan; |
| newVal = cpsr; |
| misc_reg = MISCREG_CPSR; |
| } |
| break; |
| case MISCREG_AT_S1E1R_Xt: |
| case MISCREG_AT_S1E1W_Xt: |
| case MISCREG_AT_S1E0R_Xt: |
| case MISCREG_AT_S1E0W_Xt: |
| case MISCREG_AT_S1E2R_Xt: |
| case MISCREG_AT_S1E2W_Xt: |
| case MISCREG_AT_S12E1R_Xt: |
| case MISCREG_AT_S12E1W_Xt: |
| case MISCREG_AT_S12E0R_Xt: |
| case MISCREG_AT_S12E0W_Xt: |
| case MISCREG_AT_S1E3R_Xt: |
| case MISCREG_AT_S1E3W_Xt: |
| { |
| RequestPtr req = std::make_shared<Request>(); |
| Request::Flags flags = 0; |
| BaseTLB::Mode mode = BaseTLB::Read; |
| TLB::ArmTranslationType tranType = TLB::NormalTran; |
| Fault fault; |
| switch(misc_reg) { |
| case MISCREG_AT_S1E1R_Xt: |
| tranType = TLB::S1E1Tran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_AT_S1E1W_Xt: |
| tranType = TLB::S1E1Tran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_AT_S1E0R_Xt: |
| flags = TLB::UserMode; |
| tranType = TLB::S1E0Tran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_AT_S1E0W_Xt: |
| flags = TLB::UserMode; |
| tranType = TLB::S1E0Tran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_AT_S1E2R_Xt: |
| tranType = TLB::S1E2Tran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_AT_S1E2W_Xt: |
| tranType = TLB::S1E2Tran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_AT_S12E0R_Xt: |
| flags = TLB::UserMode; |
| tranType = TLB::S12E0Tran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_AT_S12E0W_Xt: |
| flags = TLB::UserMode; |
| tranType = TLB::S12E0Tran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_AT_S12E1R_Xt: |
| tranType = TLB::S12E1Tran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_AT_S12E1W_Xt: |
| tranType = TLB::S12E1Tran; |
| mode = BaseTLB::Write; |
| break; |
| case MISCREG_AT_S1E3R_Xt: |
| tranType = TLB::S1E3Tran; |
| mode = BaseTLB::Read; |
| break; |
| case MISCREG_AT_S1E3W_Xt: |
| tranType = TLB::S1E3Tran; |
| mode = BaseTLB::Write; |
| break; |
| } |
| // If we're in timing mode then doing the translation in |
| // functional mode then we're slightly distorting performance |
| // results obtained from simulations. The translation should be |
| // done in the same mode the core is running in. NOTE: This |
| // can't be an atomic translation because that causes problems |
| // with unexpected atomic snoop requests. |
| warn("Translating via %s in functional mode! Fix Me!\n", |
| miscRegName[misc_reg]); |
| |
| req->setVirt(val, 0, flags, Request::funcMasterId, |
| tc->pcState().pc()); |
| req->setContext(tc->contextId()); |
| fault = getDTBPtr(tc)->translateFunctional(req, tc, mode, |
| tranType); |
| |
| RegVal newVal; |
| if (fault == NoFault) { |
| Addr paddr = req->getPaddr(); |
| uint64_t attr = getDTBPtr(tc)->getAttr(); |
| uint64_t attr1 = attr >> 56; |
| if (!attr1 || attr1 ==0x44) { |
| attr |= 0x100; |
| attr &= ~ uint64_t(0x80); |
| } |
| newVal = (paddr & mask(47, 12)) | attr; |
| DPRINTF(MiscRegs, |
| "MISCREG: Translated addr %#x: PAR_EL1: %#xx\n", |
| val, newVal); |
| } else { |
| ArmFault *armFault = static_cast<ArmFault *>(fault.get()); |
| armFault->update(tc); |
| // Set fault bit and FSR |
| FSR fsr = armFault->getFsr(tc); |
| |
| CPSR cpsr = tc->readMiscReg(MISCREG_CPSR); |
| if (cpsr.width) { // AArch32 |
| newVal = ((fsr >> 9) & 1) << 11; |
| // rearrange fault status |
| newVal |= ((fsr >> 0) & 0x3f) << 1; |
| newVal |= 0x1; // F bit |
| newVal |= ((armFault->iss() >> 7) & 0x1) << 8; |
| newVal |= armFault->isStage2() ? 0x200 : 0; |
| } else { // AArch64 |
| newVal = 1; // F bit |
| newVal |= fsr << 1; // FST |
| // TODO: DDI 0487A.f D7-2083, AbortFault's s1ptw bit. |
| newVal |= armFault->isStage2() ? 1 << 8 : 0; // PTW |
| newVal |= armFault->isStage2() ? 1 << 9 : 0; // S |
| newVal |= 1 << 11; // RES1 |
| } |
| DPRINTF(MiscRegs, |
| "MISCREG: Translated addr %#x fault fsr %#x: PAR: %#x\n", |
| val, fsr, newVal); |
| } |
| setMiscRegNoEffect(MISCREG_PAR_EL1, newVal); |
| return; |
| } |
| case MISCREG_SPSR_EL3: |
| case MISCREG_SPSR_EL2: |
| case MISCREG_SPSR_EL1: |
| { |
| RegVal spsr_mask = havePAN ? |
| ~(0x5 << 21) : ~(0x7 << 21); |
| |
| newVal = val & spsr_mask; |
| break; |
| } |
| case MISCREG_L2CTLR: |
| warn("miscreg L2CTLR (%s) written with %#x. ignored...\n", |
| miscRegName[misc_reg], uint32_t(val)); |
| break; |
| |
| // Generic Timer registers |
| case MISCREG_CNTFRQ ... MISCREG_CNTVOFF: |
| case MISCREG_CNTFRQ_EL0 ... MISCREG_CNTVOFF_EL2: |
| getGenericTimer(tc).setMiscReg(misc_reg, newVal); |
| break; |
| case MISCREG_ICC_AP0R0 ... MISCREG_ICH_LRC15: |
| case MISCREG_ICC_PMR_EL1 ... MISCREG_ICC_IGRPEN1_EL3: |
| case MISCREG_ICH_AP0R0_EL2 ... MISCREG_ICH_LR15_EL2: |
| getGICv3CPUInterface(tc).setMiscReg(misc_reg, newVal); |
| return; |
| case MISCREG_ZCR_EL3: |
| case MISCREG_ZCR_EL2: |
| case MISCREG_ZCR_EL1: |
| tc->getDecoderPtr()->setSveLen( |
| (getCurSveVecLenInBits(tc) >> 7) - 1); |
| break; |
| } |
| } |
| setMiscRegNoEffect(misc_reg, newVal); |
| } |
| |
| BaseISADevice & |
| ISA::getGenericTimer(ThreadContext *tc) |
| { |
| // We only need to create an ISA interface the first time we try |
| // to access the timer. |
| if (timer) |
| return *timer.get(); |
| |
| assert(system); |
| GenericTimer *generic_timer(system->getGenericTimer()); |
| if (!generic_timer) { |
| panic("Trying to get a generic timer from a system that hasn't " |
| "been configured to use a generic timer.\n"); |
| } |
| |
| timer.reset(new GenericTimerISA(*generic_timer, tc->contextId())); |
| timer->setThreadContext(tc); |
| |
| return *timer.get(); |
| } |
| |
| BaseISADevice & |
| ISA::getGICv3CPUInterface(ThreadContext *tc) |
| { |
| panic_if(!gicv3CpuInterface, "GICV3 cpu interface is not registered!"); |
| return *gicv3CpuInterface.get(); |
| } |
| |
| unsigned |
| ISA::getCurSveVecLenInBits(ThreadContext *tc) const |
| { |
| if (!FullSystem) { |
| return sveVL * 128; |
| } |
| |
| panic_if(!tc, |
| "A ThreadContext is needed to determine the SVE vector length " |
| "in full-system mode"); |
| |
| CPSR cpsr = miscRegs[MISCREG_CPSR]; |
| ExceptionLevel el = (ExceptionLevel) (uint8_t) cpsr.el; |
| |
| unsigned len = 0; |
| |
| if (el == EL1 || (el == EL0 && !ELIsInHost(tc, el))) { |
| len = static_cast<ZCR>(miscRegs[MISCREG_ZCR_EL1]).len; |
| } |
| |
| if (el == EL2 || (el == EL0 && ELIsInHost(tc, el))) { |
| len = static_cast<ZCR>(miscRegs[MISCREG_ZCR_EL2]).len; |
| } else if (haveVirtualization && !inSecureState(tc) && |
| (el == EL0 || el == EL1)) { |
| len = std::min( |
| len, |
| static_cast<unsigned>( |
| static_cast<ZCR>(miscRegs[MISCREG_ZCR_EL2]).len)); |
| } |
| |
| if (el == EL3) { |
| len = static_cast<ZCR>(miscRegs[MISCREG_ZCR_EL3]).len; |
| } else if (haveSecurity) { |
| len = std::min( |
| len, |
| static_cast<unsigned>( |
| static_cast<ZCR>(miscRegs[MISCREG_ZCR_EL3]).len)); |
| } |
| |
| len = std::min(len, sveVL - 1); |
| |
| return (len + 1) * 128; |
| } |
| |
| void |
| ISA::zeroSveVecRegUpperPart(VecRegContainer &vc, unsigned eCount) |
| { |
| auto vv = vc.as<uint64_t>(); |
| for (int i = 2; i < eCount; ++i) { |
| vv[i] = 0; |
| } |
| } |
| |
| ISA::MiscRegLUTEntryInitializer::chain |
| ISA::MiscRegLUTEntryInitializer::highest(ArmSystem *const sys) const |
| { |
| switch (FullSystem ? sys->highestEL() : EL1) { |
| case EL0: |
| case EL1: priv(); break; |
| case EL2: hyp(); break; |
| case EL3: mon(); break; |
| } |
| return *this; |
| } |
| |
| } // namespace ArmISA |
| |
| ArmISA::ISA * |
| ArmISAParams::create() |
| { |
| return new ArmISA::ISA(this); |
| } |
