17584SAli.Saidi@arm.com/* 27584SAli.Saidi@arm.com * Copyright (c) 2010 ARM Limited 37584SAli.Saidi@arm.com * All rights reserved 47584SAli.Saidi@arm.com * 57584SAli.Saidi@arm.com * The license below extends only to copyright in the software and shall 67584SAli.Saidi@arm.com * not be construed as granting a license to any other intellectual 77584SAli.Saidi@arm.com * property including but not limited to intellectual property relating 87584SAli.Saidi@arm.com * to a hardware implementation of the functionality of the software 97584SAli.Saidi@arm.com * licensed hereunder. You may use the software subject to the license 107584SAli.Saidi@arm.com * terms below provided that you ensure that this notice is replicated 117584SAli.Saidi@arm.com * unmodified and in its entirety in all distributions of the software, 127584SAli.Saidi@arm.com * modified or unmodified, in source code or in binary form. 137584SAli.Saidi@arm.com * 147584SAli.Saidi@arm.com * Redistribution and use in source and binary forms, with or without 157584SAli.Saidi@arm.com * modification, are permitted provided that the following conditions are 167584SAli.Saidi@arm.com * met: redistributions of source code must retain the above copyright 177584SAli.Saidi@arm.com * notice, this list of conditions and the following disclaimer; 187584SAli.Saidi@arm.com * redistributions in binary form must reproduce the above copyright 197584SAli.Saidi@arm.com * notice, this list of conditions and the following disclaimer in the 207584SAli.Saidi@arm.com * documentation and/or other materials provided with the distribution; 217584SAli.Saidi@arm.com * neither the name of the copyright holders nor the names of its 227584SAli.Saidi@arm.com * contributors may be used to endorse or promote products derived from 237584SAli.Saidi@arm.com * this software without specific prior written permission. 247584SAli.Saidi@arm.com * 257584SAli.Saidi@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 267584SAli.Saidi@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 277584SAli.Saidi@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 287584SAli.Saidi@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 297584SAli.Saidi@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 307584SAli.Saidi@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 317584SAli.Saidi@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 327584SAli.Saidi@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 337584SAli.Saidi@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 347584SAli.Saidi@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 357584SAli.Saidi@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 367584SAli.Saidi@arm.com * 377584SAli.Saidi@arm.com * Authors: Ali Saidi 387584SAli.Saidi@arm.com */ 397584SAli.Saidi@arm.com 4011793Sbrandon.potter@amd.com#include "dev/arm/timer_sp804.hh" 4111793Sbrandon.potter@amd.com 427584SAli.Saidi@arm.com#include "base/intmath.hh" 437584SAli.Saidi@arm.com#include "base/trace.hh" 448245Snate@binkert.org#include "debug/Checkpoint.hh" 458245Snate@binkert.org#include "debug/Timer.hh" 469525SAndreas.Sandberg@ARM.com#include "dev/arm/base_gic.hh" 477584SAli.Saidi@arm.com#include "mem/packet.hh" 487584SAli.Saidi@arm.com#include "mem/packet_access.hh" 497584SAli.Saidi@arm.com 507584SAli.Saidi@arm.comSp804::Sp804(Params *p) 5112772Snikos.nikoleris@arm.com : AmbaPioDevice(p, 0x1000), gic(p->gic), 529808Sstever@gmail.com timer0(name() + ".timer0", this, p->int_num0, p->clock0), 537584SAli.Saidi@arm.com timer1(name() + ".timer1", this, p->int_num1, p->clock1) 547584SAli.Saidi@arm.com{ 557584SAli.Saidi@arm.com} 567584SAli.Saidi@arm.com 577584SAli.Saidi@arm.comSp804::Timer::Timer(std::string __name, Sp804 *_parent, int int_num, Tick _clock) 587584SAli.Saidi@arm.com : _name(__name), parent(_parent), intNum(int_num), clock(_clock), control(0x20), 5912086Sspwilson2@wisc.edu rawInt(false), pendingInt(false), loadValue(0xffffffff), 6012086Sspwilson2@wisc.edu zeroEvent([this]{ counterAtZero(); }, name()) 617584SAli.Saidi@arm.com{ 627584SAli.Saidi@arm.com} 637584SAli.Saidi@arm.com 647584SAli.Saidi@arm.com 657584SAli.Saidi@arm.comTick 667584SAli.Saidi@arm.comSp804::read(PacketPtr pkt) 677584SAli.Saidi@arm.com{ 687584SAli.Saidi@arm.com assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 697584SAli.Saidi@arm.com assert(pkt->getSize() == 4); 707584SAli.Saidi@arm.com Addr daddr = pkt->getAddr() - pioAddr; 717584SAli.Saidi@arm.com DPRINTF(Timer, "Reading from DualTimer at offset: %#x\n", daddr); 727584SAli.Saidi@arm.com 737584SAli.Saidi@arm.com if (daddr < Timer::Size) 747584SAli.Saidi@arm.com timer0.read(pkt, daddr); 757584SAli.Saidi@arm.com else if ((daddr - Timer::Size) < Timer::Size) 767584SAli.Saidi@arm.com timer1.read(pkt, daddr - Timer::Size); 777587SAli.Saidi@arm.com else if (!readId(pkt, ambaId, pioAddr)) 787584SAli.Saidi@arm.com panic("Tried to read SP804 at offset %#x that doesn't exist\n", daddr); 797584SAli.Saidi@arm.com pkt->makeAtomicResponse(); 807584SAli.Saidi@arm.com return pioDelay; 817584SAli.Saidi@arm.com} 827584SAli.Saidi@arm.com 837584SAli.Saidi@arm.com 847584SAli.Saidi@arm.comvoid 857584SAli.Saidi@arm.comSp804::Timer::read(PacketPtr pkt, Addr daddr) 867584SAli.Saidi@arm.com{ 877584SAli.Saidi@arm.com switch(daddr) { 887584SAli.Saidi@arm.com case LoadReg: 8913230Sgabeblack@google.com pkt->setLE<uint32_t>(loadValue); 907584SAli.Saidi@arm.com break; 917584SAli.Saidi@arm.com case CurrentReg: 927584SAli.Saidi@arm.com DPRINTF(Timer, "Event schedule for %d, clock=%d, prescale=%d\n", 937584SAli.Saidi@arm.com zeroEvent.when(), clock, control.timerPrescale); 947584SAli.Saidi@arm.com Tick time; 957823Ssteve.reinhardt@amd.com time = zeroEvent.when() - curTick(); 967584SAli.Saidi@arm.com time = time / clock / power(16, control.timerPrescale); 977584SAli.Saidi@arm.com DPRINTF(Timer, "-- returning counter at %d\n", time); 9813230Sgabeblack@google.com pkt->setLE<uint32_t>(time); 997584SAli.Saidi@arm.com break; 1007584SAli.Saidi@arm.com case ControlReg: 10113230Sgabeblack@google.com pkt->setLE<uint32_t>(control); 1027584SAli.Saidi@arm.com break; 1037584SAli.Saidi@arm.com case RawISR: 10413230Sgabeblack@google.com pkt->setLE<uint32_t>(rawInt); 1057584SAli.Saidi@arm.com break; 1067584SAli.Saidi@arm.com case MaskedISR: 10713230Sgabeblack@google.com pkt->setLE<uint32_t>(pendingInt); 1087584SAli.Saidi@arm.com break; 1097584SAli.Saidi@arm.com case BGLoad: 11013230Sgabeblack@google.com pkt->setLE<uint32_t>(loadValue); 1117584SAli.Saidi@arm.com break; 1127584SAli.Saidi@arm.com default: 1137584SAli.Saidi@arm.com panic("Tried to read SP804 timer at offset %#x\n", daddr); 1147584SAli.Saidi@arm.com break; 1157584SAli.Saidi@arm.com } 11613230Sgabeblack@google.com DPRINTF(Timer, "Reading %#x from Timer at offset: %#x\n", 11713230Sgabeblack@google.com pkt->getLE<uint32_t>(), daddr); 1187584SAli.Saidi@arm.com} 1197584SAli.Saidi@arm.com 1207584SAli.Saidi@arm.comTick 1217584SAli.Saidi@arm.comSp804::write(PacketPtr pkt) 1227584SAli.Saidi@arm.com{ 1237584SAli.Saidi@arm.com assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 1247584SAli.Saidi@arm.com assert(pkt->getSize() == 4); 1257584SAli.Saidi@arm.com Addr daddr = pkt->getAddr() - pioAddr; 1267584SAli.Saidi@arm.com DPRINTF(Timer, "Writing to DualTimer at offset: %#x\n", daddr); 1277584SAli.Saidi@arm.com 1287584SAli.Saidi@arm.com if (daddr < Timer::Size) 1297584SAli.Saidi@arm.com timer0.write(pkt, daddr); 1307584SAli.Saidi@arm.com else if ((daddr - Timer::Size) < Timer::Size) 1317584SAli.Saidi@arm.com timer1.write(pkt, daddr - Timer::Size); 1327587SAli.Saidi@arm.com else if (!readId(pkt, ambaId, pioAddr)) 1337584SAli.Saidi@arm.com panic("Tried to write SP804 at offset %#x that doesn't exist\n", daddr); 1347584SAli.Saidi@arm.com pkt->makeAtomicResponse(); 1357584SAli.Saidi@arm.com return pioDelay; 1367584SAli.Saidi@arm.com} 1377584SAli.Saidi@arm.com 1387584SAli.Saidi@arm.comvoid 1397584SAli.Saidi@arm.comSp804::Timer::write(PacketPtr pkt, Addr daddr) 1407584SAli.Saidi@arm.com{ 14113230Sgabeblack@google.com DPRINTF(Timer, "Writing %#x to Timer at offset: %#x\n", 14213230Sgabeblack@google.com pkt->getLE<uint32_t>(), daddr); 1437584SAli.Saidi@arm.com switch (daddr) { 1447584SAli.Saidi@arm.com case LoadReg: 14513230Sgabeblack@google.com loadValue = pkt->getLE<uint32_t>(); 1467584SAli.Saidi@arm.com restartCounter(loadValue); 1477584SAli.Saidi@arm.com break; 1487584SAli.Saidi@arm.com case CurrentReg: 1497584SAli.Saidi@arm.com // Spec says this value can't be written, but linux writes it anyway 1507584SAli.Saidi@arm.com break; 1517584SAli.Saidi@arm.com case ControlReg: 1527584SAli.Saidi@arm.com bool old_enable; 1537584SAli.Saidi@arm.com old_enable = control.timerEnable; 15413230Sgabeblack@google.com control = pkt->getLE<uint32_t>(); 1557584SAli.Saidi@arm.com if ((old_enable == 0) && control.timerEnable) 1567584SAli.Saidi@arm.com restartCounter(loadValue); 1577584SAli.Saidi@arm.com break; 1587584SAli.Saidi@arm.com case IntClear: 1597584SAli.Saidi@arm.com rawInt = false; 1607584SAli.Saidi@arm.com if (pendingInt) { 1617584SAli.Saidi@arm.com pendingInt = false; 1627584SAli.Saidi@arm.com DPRINTF(Timer, "Clearing interrupt\n"); 1637584SAli.Saidi@arm.com parent->gic->clearInt(intNum); 1647584SAli.Saidi@arm.com } 1657584SAli.Saidi@arm.com break; 1667584SAli.Saidi@arm.com case BGLoad: 16713230Sgabeblack@google.com loadValue = pkt->getLE<uint32_t>(); 1687584SAli.Saidi@arm.com break; 1697584SAli.Saidi@arm.com default: 1707584SAli.Saidi@arm.com panic("Tried to write SP804 timer at offset %#x\n", daddr); 1717584SAli.Saidi@arm.com break; 1727584SAli.Saidi@arm.com } 1737584SAli.Saidi@arm.com} 1747584SAli.Saidi@arm.com 1757584SAli.Saidi@arm.comvoid 1767584SAli.Saidi@arm.comSp804::Timer::restartCounter(uint32_t val) 1777584SAli.Saidi@arm.com{ 1787584SAli.Saidi@arm.com DPRINTF(Timer, "Resetting counter with value %#x\n", val); 1797584SAli.Saidi@arm.com if (!control.timerEnable) 1807584SAli.Saidi@arm.com return; 1817584SAli.Saidi@arm.com 1827943SAli.Saidi@ARM.com Tick time = clock * power(16, control.timerPrescale); 1837584SAli.Saidi@arm.com if (control.timerSize) 1847943SAli.Saidi@ARM.com time *= val; 1857943SAli.Saidi@ARM.com else 1867584SAli.Saidi@arm.com time *= bits(val,15,0); 1877584SAli.Saidi@arm.com 1887584SAli.Saidi@arm.com if (zeroEvent.scheduled()) { 1897584SAli.Saidi@arm.com DPRINTF(Timer, "-- Event was already schedule, de-scheduling\n"); 1907584SAli.Saidi@arm.com parent->deschedule(zeroEvent); 1917584SAli.Saidi@arm.com } 1927823Ssteve.reinhardt@amd.com parent->schedule(zeroEvent, curTick() + time); 1937823Ssteve.reinhardt@amd.com DPRINTF(Timer, "-- Scheduling new event for: %d\n", curTick() + time); 1947584SAli.Saidi@arm.com} 1957584SAli.Saidi@arm.com 1967584SAli.Saidi@arm.comvoid 1977584SAli.Saidi@arm.comSp804::Timer::counterAtZero() 1987584SAli.Saidi@arm.com{ 1997584SAli.Saidi@arm.com if (!control.timerEnable) 2007584SAli.Saidi@arm.com return; 2017584SAli.Saidi@arm.com 2027584SAli.Saidi@arm.com DPRINTF(Timer, "Counter reached zero\n"); 2037584SAli.Saidi@arm.com 2047584SAli.Saidi@arm.com rawInt = true; 2057584SAli.Saidi@arm.com bool old_pending = pendingInt; 2067584SAli.Saidi@arm.com if (control.intEnable) 2077584SAli.Saidi@arm.com pendingInt = true; 2088993SAli.Saidi@ARM.com if (pendingInt && !old_pending) { 2097584SAli.Saidi@arm.com DPRINTF(Timer, "-- Causing interrupt\n"); 2107584SAli.Saidi@arm.com parent->gic->sendInt(intNum); 2117584SAli.Saidi@arm.com } 2127584SAli.Saidi@arm.com 2137584SAli.Saidi@arm.com if (control.oneShot) 2147584SAli.Saidi@arm.com return; 2157584SAli.Saidi@arm.com 2167584SAli.Saidi@arm.com // Free-running 2177584SAli.Saidi@arm.com if (control.timerMode == 0) 2187584SAli.Saidi@arm.com restartCounter(0xffffffff); 2197584SAli.Saidi@arm.com else 2207584SAli.Saidi@arm.com restartCounter(loadValue); 2217584SAli.Saidi@arm.com} 2227584SAli.Saidi@arm.com 2237733SAli.Saidi@ARM.comvoid 22410905Sandreas.sandberg@arm.comSp804::Timer::serialize(CheckpointOut &cp) const 2257733SAli.Saidi@ARM.com{ 2267733SAli.Saidi@ARM.com DPRINTF(Checkpoint, "Serializing Arm Sp804\n"); 2277733SAli.Saidi@ARM.com 2287733SAli.Saidi@ARM.com uint32_t control_serial = control; 2297733SAli.Saidi@ARM.com SERIALIZE_SCALAR(control_serial); 2307733SAli.Saidi@ARM.com 2317733SAli.Saidi@ARM.com SERIALIZE_SCALAR(rawInt); 2327733SAli.Saidi@ARM.com SERIALIZE_SCALAR(pendingInt); 2337733SAli.Saidi@ARM.com SERIALIZE_SCALAR(loadValue); 2347733SAli.Saidi@ARM.com 2357733SAli.Saidi@ARM.com bool is_in_event = zeroEvent.scheduled(); 2367733SAli.Saidi@ARM.com SERIALIZE_SCALAR(is_in_event); 2377733SAli.Saidi@ARM.com 2387733SAli.Saidi@ARM.com Tick event_time; 2397733SAli.Saidi@ARM.com if (is_in_event){ 2407733SAli.Saidi@ARM.com event_time = zeroEvent.when(); 2417733SAli.Saidi@ARM.com SERIALIZE_SCALAR(event_time); 2427733SAli.Saidi@ARM.com } 2437733SAli.Saidi@ARM.com} 2447733SAli.Saidi@ARM.com 2457733SAli.Saidi@ARM.comvoid 24610905Sandreas.sandberg@arm.comSp804::Timer::unserialize(CheckpointIn &cp) 2477733SAli.Saidi@ARM.com{ 2487733SAli.Saidi@ARM.com DPRINTF(Checkpoint, "Unserializing Arm Sp804\n"); 2497733SAli.Saidi@ARM.com 2507733SAli.Saidi@ARM.com uint32_t control_serial; 2517733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(control_serial); 2527733SAli.Saidi@ARM.com control = control_serial; 2537733SAli.Saidi@ARM.com 2547733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(rawInt); 2557733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(pendingInt); 2567733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(loadValue); 2577733SAli.Saidi@ARM.com 2587733SAli.Saidi@ARM.com bool is_in_event; 2597733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(is_in_event); 2607733SAli.Saidi@ARM.com 2617733SAli.Saidi@ARM.com Tick event_time; 2627733SAli.Saidi@ARM.com if (is_in_event){ 2637733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(event_time); 2647733SAli.Saidi@ARM.com parent->schedule(zeroEvent, event_time); 2657733SAli.Saidi@ARM.com } 2667733SAli.Saidi@ARM.com} 2677733SAli.Saidi@ARM.com 2687733SAli.Saidi@ARM.com 2697584SAli.Saidi@arm.com 2707584SAli.Saidi@arm.comvoid 27110905Sandreas.sandberg@arm.comSp804::serialize(CheckpointOut &cp) const 2727584SAli.Saidi@arm.com{ 27310905Sandreas.sandberg@arm.com timer0.serializeSection(cp, "timer0"); 27410905Sandreas.sandberg@arm.com timer1.serializeSection(cp, "timer1"); 2757584SAli.Saidi@arm.com} 2767584SAli.Saidi@arm.com 2777584SAli.Saidi@arm.comvoid 27810905Sandreas.sandberg@arm.comSp804::unserialize(CheckpointIn &cp) 2797584SAli.Saidi@arm.com{ 28010905Sandreas.sandberg@arm.com timer0.unserializeSection(cp, "timer0"); 28110905Sandreas.sandberg@arm.com timer1.unserializeSection(cp, "timer1"); 2827584SAli.Saidi@arm.com} 2837584SAli.Saidi@arm.com 2847584SAli.Saidi@arm.comSp804 * 2857584SAli.Saidi@arm.comSp804Params::create() 2867584SAli.Saidi@arm.com{ 2877584SAli.Saidi@arm.com return new Sp804(this); 2887584SAli.Saidi@arm.com} 289