| /* |
| * Copyright (c) 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 "dev/arm/fvp_base_pwr_ctrl.hh" |
| |
| #include "arch/arm/faults.hh" |
| #include "arch/arm/system.hh" |
| #include "arch/arm/utility.hh" |
| #include "cpu/base.hh" |
| #include "cpu/thread_context.hh" |
| #include "debug/FVPBasePwrCtrl.hh" |
| #include "mem/packet_access.hh" |
| #include "params/FVPBasePwrCtrl.hh" |
| #include "sim/system.hh" |
| |
| FVPBasePwrCtrl::FVPBasePwrCtrl(FVPBasePwrCtrlParams *const params) |
| : BasicPioDevice(params, 0x1000), |
| regs(), |
| system(*static_cast<ArmSystem *>(sys)) |
| { |
| warn_if(sys->multiThread, |
| "Base Power Controller does not support multi-threaded systems\n"); |
| system.setPowerController(this); |
| } |
| |
| void |
| FVPBasePwrCtrl::startup() |
| { |
| // All cores are ON by default (PwrStatus.{l0,l1} = 0b1) |
| corePwrStatus.resize(sys->threads.size(), 0x60000000); |
| for (const auto &tc : sys->threads) |
| poweredCoresPerCluster[tc->socketId()] += 1; |
| BasicPioDevice::startup(); |
| } |
| |
| void |
| FVPBasePwrCtrl::setStandByWfi(ThreadContext *const tc) |
| { |
| PwrStatus *pwrs = getCorePwrStatus(tc); |
| |
| if (!pwrs->pwfi) |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::setStandByWfi: STANDBYWFI " |
| "asserted for core %d\n", tc->contextId()); |
| pwrs->pwfi = 1; |
| if (pwrs->l0 && (pwrs->pp || pwrs->pc)) |
| powerCoreOff(tc, pwrs); |
| } |
| |
| void |
| FVPBasePwrCtrl::clearStandByWfi(ThreadContext *const tc) |
| { |
| PwrStatus *pwrs = getCorePwrStatus(tc); |
| |
| if (pwrs->pwfi) |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::clearStandByWfi: STANDBYWFI " |
| "deasserted for core %d\n", tc->contextId()); |
| pwrs->pwfi = 0; |
| } |
| |
| bool |
| FVPBasePwrCtrl::setWakeRequest(ThreadContext *const tc) |
| { |
| PwrStatus *pwrs = getCorePwrStatus(tc); |
| |
| if (!pwrs->pwk) |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::setWakeRequest: WakeRequest " |
| "asserted for core %d\n", tc->contextId()); |
| pwrs->pwk = 1; |
| if (!pwrs->l0 && pwrs->wen) { |
| pwrs->wk = WK_GICWR; |
| powerCoreOn(tc, pwrs); |
| return true; |
| } |
| return false; |
| } |
| |
| void |
| FVPBasePwrCtrl::clearWakeRequest(ThreadContext *const tc) |
| { |
| PwrStatus *pwrs = getCorePwrStatus(tc); |
| |
| if (pwrs->pwk) |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::clearWakeRequest: " |
| "WakeRequest deasserted for core %d\n", tc->contextId()); |
| pwrs->pwk = 0; |
| } |
| |
| Tick |
| FVPBasePwrCtrl::read(PacketPtr pkt) |
| { |
| const Addr addr = pkt->getAddr() - pioAddr; |
| const size_t size = pkt->getSize(); |
| panic_if(size != 4, "FVPBasePwrCtrl::read: Invalid size %i\n", size); |
| |
| uint64_t resp = 0; |
| switch (addr) { |
| case PPOFFR: |
| resp = regs.ppoffr; |
| break; |
| case PPONR: |
| resp = regs.pponr; |
| break; |
| case PCOFFR: |
| resp = regs.pcoffr; |
| break; |
| case PWKUPR: |
| resp = regs.pwkupr; |
| break; |
| case PSYSR: |
| resp = regs.psysr; |
| break; |
| default: |
| warn("FVPBasePwrCtrl::read: Unexpected address (0x%x:%i), " |
| "assuming RAZ\n", addr, size); |
| } |
| |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::read: 0x%x<-0x%x(%i)\n", resp, |
| addr, size); |
| |
| pkt->setUintX(resp, ByteOrder::little); |
| pkt->makeResponse(); |
| return pioDelay; |
| } |
| |
| Tick |
| FVPBasePwrCtrl::write(PacketPtr pkt) |
| { |
| const Addr addr = pkt->getAddr() - pioAddr; |
| const size_t size = pkt->getSize(); |
| panic_if(size != 4, "FVPBasePwrCtrl::write: Invalid size %i\n", size); |
| |
| uint64_t data = pkt->getUintX(ByteOrder::little); |
| |
| // Software may use the power controller to check for core presence |
| // If core is not present, return an invalid MPID as notification |
| ThreadContext *tc = getThreadContextByMPID(data & MPID_MSK); |
| PwrStatus *pwrs = tc ? getCorePwrStatus(tc) : nullptr; |
| switch (addr) { |
| case PPOFFR: |
| if (!tc) { |
| regs.ppoffr = ~0; |
| } else if (pwrs->l0) { |
| // Set pending power off |
| pwrs->pp = 1; |
| regs.ppoffr = data & MPID_MSK; |
| } else { |
| regs.ppoffr = ~0 & MPID_MSK; |
| } |
| break; |
| case PPONR: |
| if (!tc) { |
| regs.pponr = ~0; |
| } else { |
| if (!pwrs->l0) { |
| pwrs->wk = WK_PPONR; |
| powerCoreOn(tc, pwrs); |
| startCoreUp(tc); |
| regs.pponr = data & MPID_MSK; |
| } else { |
| regs.pponr = ~0 & MPID_MSK; |
| } |
| } |
| break; |
| case PCOFFR: |
| if (!tc) { |
| regs.pcoffr = ~0; |
| } else if (pwrs->l0) { |
| // Power off all cores in the cluster |
| for (const auto &tco : sys->threads) { |
| if (tc->socketId() == tco->socketId()) { |
| PwrStatus *npwrs = getCorePwrStatus(tco); |
| // Set pending cluster power off |
| npwrs->pc = 1; |
| if (npwrs->l0 && npwrs->pwfi) |
| powerCoreOff(tco, npwrs); |
| } |
| } |
| } else { |
| regs.pcoffr = ~0 & MPID_MSK; |
| } |
| break; |
| case PWKUPR: |
| if (!tc) { |
| regs.pwkupr = ~0; |
| } else { |
| // Update WEN value |
| pwrs->wen = bits(data, 31); |
| // Power-on if there is any pending Wakeup Requests |
| if (!pwrs->l0 && pwrs->wen && pwrs->pwk) { |
| pwrs->wk = WK_GICWR; |
| powerCoreOn(tc, pwrs); |
| startCoreUp(tc); |
| } |
| regs.pwkupr = data & (MPID_MSK | (1 << 31)); |
| } |
| break; |
| case PSYSR: |
| if (!tc) |
| regs.psysr = ~0; |
| else |
| regs.psysr = (data & MPID_MSK) | (((uint32_t) *pwrs) & ~MPID_MSK); |
| break; |
| default: |
| warn("FVPBasePwrCtrl::write: Unexpected address (0x%x:%i), " |
| "assuming WI\n", addr, size); |
| } |
| |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::write: 0x%x->0x%x(%i)\n", data, |
| addr, size); |
| |
| pkt->makeResponse(); |
| return pioDelay; |
| } |
| |
| FVPBasePwrCtrl::PwrStatus * |
| FVPBasePwrCtrl::getCorePwrStatus(ThreadContext *const tc) |
| { |
| PwrStatus *pwrs = &corePwrStatus[tc->contextId()]; |
| pwrs->l1 = poweredCoresPerCluster[tc->socketId()] > 0; |
| return pwrs; |
| } |
| |
| ThreadContext * |
| FVPBasePwrCtrl::getThreadContextByMPID(uint32_t mpid) const |
| { |
| for (auto &tc : sys->threads) { |
| if (mpid == ArmISA::getAffinity(&system, tc)) |
| return tc; |
| } |
| return nullptr; |
| } |
| |
| void |
| FVPBasePwrCtrl::powerCoreOn(ThreadContext *const tc, PwrStatus *const pwrs) |
| { |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::powerCoreOn: Powering ON " |
| "core %d\n", tc->contextId()); |
| pwrs->l0 = 1; |
| poweredCoresPerCluster[tc->socketId()]++; |
| // Clear pending power-offs to the core |
| pwrs->pp = 0; |
| // Clear pending power-offs to the core's cluster |
| for (const auto &tco : sys->threads) { |
| if (tc->socketId() == tco->socketId()) { |
| PwrStatus *npwrs = getCorePwrStatus(tco); |
| npwrs->pc = 0; |
| } |
| } |
| tc->getCpuPtr()->powerState->set(Enums::PwrState::ON); |
| } |
| |
| void |
| FVPBasePwrCtrl::powerCoreOff(ThreadContext *const tc, PwrStatus *const pwrs) |
| { |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::powerCoreOff: Powering OFF " |
| "core %d\n", tc->contextId()); |
| pwrs->l0 = 0; |
| poweredCoresPerCluster[tc->socketId()]--; |
| // Clear pending power-offs to the core |
| pwrs->pp = 0; |
| pwrs->pc = 0; |
| // Clear power-on reason |
| pwrs->wk = 0; |
| tc->getCpuPtr()->powerState->set(Enums::PwrState::OFF); |
| } |
| |
| void |
| FVPBasePwrCtrl::startCoreUp(ThreadContext *const tc) |
| { |
| DPRINTF(FVPBasePwrCtrl, "FVPBasePwrCtrl::startCoreUp: Starting core %d " |
| "from the power controller\n", tc->contextId()); |
| clearStandByWfi(tc); |
| clearWakeRequest(tc); |
| |
| // InitCPU |
| ArmISA::Reset().invoke(tc); |
| tc->activate(); |
| } |
| |
| FVPBasePwrCtrl * |
| FVPBasePwrCtrlParams::create() |
| { |
| return new FVPBasePwrCtrl(this); |
| } |
