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/*
* Copyright (c) 2010,2013,2015 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.
*
* Authors: Ali Saidi
*/
#include "dev/arm/rv_ctrl.hh"
#include "base/trace.hh"
#include "debug/RVCTRL.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
#include "sim/power/thermal_model.hh"
#include "sim/system.hh"
#include "sim/voltage_domain.hh"
RealViewCtrl::RealViewCtrl(Params *p)
: BasicPioDevice(p, 0xD4), flags(0), scData(0)
{
}
Tick
RealViewCtrl::read(PacketPtr pkt)
{
assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
assert(pkt->getSize() == 4);
Addr daddr = pkt->getAddr() - pioAddr;
switch(daddr) {
case ProcId0:
pkt->set(params()->proc_id0);
break;
case ProcId1:
pkt->set(params()->proc_id1);
break;
case Clock24:
Tick clk;
clk = SimClock::Float::MHz * curTick() * 24;
pkt->set((uint32_t)(clk));
break;
case Clock100:
Tick clk100;
clk100 = SimClock::Float::MHz * curTick() * 100;
pkt->set((uint32_t)(clk100));
break;
case Flash:
pkt->set<uint32_t>(0);
break;
case Clcd:
pkt->set<uint32_t>(0x00001F00);
break;
case Osc0:
pkt->set<uint32_t>(0x00012C5C);
break;
case Osc1:
pkt->set<uint32_t>(0x00002CC0);
break;
case Osc2:
pkt->set<uint32_t>(0x00002C75);
break;
case Osc3:
pkt->set<uint32_t>(0x00020211);
break;
case Osc4:
pkt->set<uint32_t>(0x00002C75);
break;
case Lock:
pkt->set<uint32_t>(sysLock);
break;
case Flags:
pkt->set<uint32_t>(flags);
break;
case IdReg:
pkt->set<uint32_t>(params()->idreg);
break;
case CfgStat:
pkt->set<uint32_t>(1);
break;
case CfgData:
pkt->set<uint32_t>(scData);
DPRINTF(RVCTRL, "Read %#x from SCReg\n", scData);
break;
case CfgCtrl:
pkt->set<uint32_t>(0); // not busy
DPRINTF(RVCTRL, "Read 0 from CfgCtrl\n");
break;
default:
warn("Tried to read RealView I/O at offset %#x that doesn't exist\n",
daddr);
pkt->set<uint32_t>(0);
break;
}
pkt->makeAtomicResponse();
return pioDelay;
}
Tick
RealViewCtrl::write(PacketPtr pkt)
{
assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
Addr daddr = pkt->getAddr() - pioAddr;
switch (daddr) {
case Flash:
case Clcd:
case Osc0:
case Osc1:
case Osc2:
case Osc3:
case Osc4:
break;
case Lock:
sysLock.lockVal = pkt->get<uint16_t>();
break;
case ResetCtl:
// Ignore writes to reset control
warn_once("Ignoring write to reset control\n");
break;
case Flags:
flags = pkt->get<uint32_t>();
break;
case FlagsClr:
flags = 0;
break;
case CfgData:
scData = pkt->get<uint32_t>();
break;
case CfgCtrl: {
// A request is being submitted to read/write the system control
// registers. See
// http://infocenter.arm.com/help/topic/com.arm.doc.dui0447h/CACDEFGH.html
CfgCtrlReg req = pkt->get<uint32_t>();
if (!req.start) {
DPRINTF(RVCTRL, "SCReg: write %#x to ctrl but not starting\n",
req);
break;
}
auto it_dev(devices.find(req & CFG_CTRL_ADDR_MASK));
if (it_dev == devices.end()) {
warn_once("SCReg: Access to unknown device "
"dcc%d:site%d:pos%d:fn%d:dev%d\n",
req.dcc, req.site, req.pos, req.func, req.dev);
break;
}
// Service the request as a read or write depending on the
// wr bit in the control register.
Device &dev(*it_dev->second);
if (req.wr) {
DPRINTF(RVCTRL, "SCReg: Writing %#x (ctrlWr %#x)\n",
scData, req);
dev.write(scData);
} else {
scData = dev.read();
DPRINTF(RVCTRL, "SCReg: Reading %#x (ctrlRd %#x)\n",
scData, req);
}
} break;
case CfgStat: // Weird to write this
default:
warn("Tried to write RVIO at offset %#x (data %#x) that doesn't exist\n",
daddr, pkt->get<uint32_t>());
break;
}
pkt->makeAtomicResponse();
return pioDelay;
}
void
RealViewCtrl::serialize(CheckpointOut &cp) const
{
SERIALIZE_SCALAR(flags);
}
void
RealViewCtrl::unserialize(CheckpointIn &cp)
{
UNSERIALIZE_SCALAR(flags);
}
void
RealViewCtrl::registerDevice(DeviceFunc func, uint8_t site, uint8_t pos,
uint8_t dcc, uint16_t dev,
Device *handler)
{
CfgCtrlReg addr = 0;
addr.func = func;
addr.site = site;
addr.pos = pos;
addr.dcc = dcc;
addr.dev = dev;
if (devices.find(addr) != devices.end()) {
fatal("Platform device dcc%d:site%d:pos%d:fn%d:dev%d "
"already registered.",
addr.dcc, addr.site, addr.pos, addr.func, addr.dev);
}
devices[addr] = handler;
}
RealViewOsc::RealViewOsc(RealViewOscParams *p)
: ClockDomain(p, p->voltage_domain),
RealViewCtrl::Device(*p->parent, RealViewCtrl::FUNC_OSC,
p->site, p->position, p->dcc, p->device)
{
if (SimClock::Float::s / p->freq > UINT32_MAX) {
fatal("Oscillator frequency out of range: %f\n",
SimClock::Float::s / p->freq / 1E6);
}
_clockPeriod = p->freq;
}
void
RealViewOsc::startup()
{
// Tell dependent object to set their clock frequency
for (auto m : members)
m->updateClockPeriod();
}
void
RealViewOsc::serialize(CheckpointOut &cp) const
{
SERIALIZE_SCALAR(_clockPeriod);
}
void
RealViewOsc::unserialize(CheckpointIn &cp)
{
UNSERIALIZE_SCALAR(_clockPeriod);
}
void
RealViewOsc::clockPeriod(Tick clock_period)
{
panic_if(clock_period == 0, "%s has a clock period of zero\n", name());
// Align all members to the current tick
for (auto m : members)
m->updateClockPeriod();
_clockPeriod = clock_period;
// inform any derived clocks they need to updated their period
for (auto m : children)
m->updateClockPeriod();
}
uint32_t
RealViewOsc::read() const
{
const uint32_t freq(SimClock::Float::s / _clockPeriod);
DPRINTF(RVCTRL, "Reading OSC frequency: %f MHz\n", freq / 1E6);
return freq;
}
void
RealViewOsc::write(uint32_t freq)
{
DPRINTF(RVCTRL, "Setting new OSC frequency: %f MHz\n", freq / 1E6);
clockPeriod(SimClock::Float::s / freq);
}
uint32_t
RealViewTemperatureSensor::read() const
{
// Temperature reported in uC
ThermalModel * tm = system->getThermalModel();
if (tm) {
double t = tm->getTemp();
if (t < 0)
warn("Temperature below zero!\n");
return fmax(0, t) * 1000000;
}
// Report a dummy 25 degrees temperature
return 25000000;
}
RealViewCtrl *
RealViewCtrlParams::create()
{
return new RealViewCtrl(this);
}
RealViewOsc *
RealViewOscParams::create()
{
return new RealViewOsc(this);
}
RealViewTemperatureSensor *
RealViewTemperatureSensorParams::create()
{
return new RealViewTemperatureSensor(this);
}