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dev: Added new Lupio-IPI device

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Added the LupIO inter-processor interrupt controller
device which will allow for us to use an SMP system
with the LupIO devices.

Change-Id: Iceab7446b36fb4d9b7605f3ba28665fca509d55d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53041
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
This commit is contained in:
Melissa Jost
2021-11-05 16:28:01 -07:00
committed by melissa jost
parent 72b5ed0543
commit 9f39ea136a
4 changed files with 244 additions and 0 deletions
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36
src/dev/lupio/LupioIPI.py Normal file
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# Copyright (c) 2021 The Regents of the University of California
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from m5.objects.Device import BasicPioDevice
from m5.params import Param
class LupioIPI(BasicPioDevice):
type = 'LupioIPI'
cxx_class='gem5::LupioIPI'
cxx_header = 'dev/lupio/lupio_ipi.hh'
pio_size = Param.Addr(0x1000, "PIO Size")
int_type = Param.Int("Type of interrupt")
num_threads = Param.Int("Number of threads")

3
src/dev/lupio/SConscript
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@@ -27,6 +27,7 @@
Import('*')
SimObject('LupioBLK.py', tags='riscv isa')
SimObject('LupioIPI.py', tags='riscv isa')
SimObject('LupioPIC.py', tags='riscv isa')
SimObject('LupioRNG.py', tags='riscv isa')
SimObject('LupioRTC.py', tags='riscv isa')
@@ -34,6 +35,7 @@ SimObject('LupioTMR.py', tags='riscv isa')
SimObject('LupioTTY.py', tags='riscv isa')
DebugFlag('LupioBLK')
DebugFlag('LupioIPI')
DebugFlag('LupioPIC')
DebugFlag('LupioRNG')
DebugFlag('LupioRTC')
@@ -41,6 +43,7 @@ DebugFlag('LupioTMR')
DebugFlag('LupioTTY')
Source('lupio_blk.cc', tags='riscv isa')
Source('lupio_ipi.cc', tags='riscv isa')
Source('lupio_pic.cc', tags='riscv isa')
Source('lupio_rng.cc', tags='riscv isa')
Source('lupio_rtc.cc', tags='riscv isa')

112
src/dev/lupio/lupio_ipi.cc Normal file
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/*
* Copyright (c) 2021 The Regents of the University of California
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "dev/lupio/lupio_ipi.hh"
#include "cpu/base.hh"
#include "debug/LupioIPI.hh"
#include "mem/packet_access.hh"
#include "params/LupioIPI.hh"
namespace gem5
{
LupioIPI::LupioIPI(const Params &params) :
BasicPioDevice(params, params.pio_size),
system(params.system),
intType(params.int_type),
nThread(params.num_threads)
{
word.resize(nThread, 0);
DPRINTF(LupioIPI, "LupioIPI initalized--number of CPUs: %d\n", nThread);
}
uint64_t
LupioIPI::lupioIPIRead(uint8_t addr, int size)
{
int cpu = addr >> 2;
uint32_t r = 0;
// Reading automatically lowers corresponding IRQ
r = word[cpu];
auto tc = system->threads[cpu];
tc->getCpuPtr()->clearInterrupt(tc->threadId(), intType, 0);
// Also reset value after reading
word[cpu] = 0;
return r;
}
void
LupioIPI::lupioIPIWrite(uint8_t addr, uint64_t val64, int size)
{
int cpu = addr >> 2;;
uint32_t val = val64;
word[cpu] = val;
// Raise IRQ
auto tc = system->threads[cpu];
tc->getCpuPtr()->postInterrupt(tc->threadId(), intType, 0);
}
Tick
LupioIPI::read(PacketPtr pkt)
{
Addr ipi_addr = pkt->getAddr() - pioAddr;
DPRINTF(LupioIPI,
"Read request - addr: %#x, size: %#x\n", ipi_addr, pkt->getSize());
uint64_t read_val = lupioIPIRead(ipi_addr, pkt->getSize());
DPRINTF(LupioIPI, "Packet Read: %#x\n", read_val);
pkt->setUintX(read_val, byteOrder);
pkt->makeResponse();
return pioDelay;
}
Tick
LupioIPI::write(PacketPtr pkt)
{
Addr ipi_addr = pkt->getAddr() - pioAddr;
DPRINTF(LupioIPI, "Write register %#x value %#x\n", ipi_addr,
pkt->getUintX(byteOrder));
lupioIPIWrite(ipi_addr, pkt->getUintX(byteOrder), pkt->getSize());
DPRINTF(LupioIPI, "Packet Write Value: %d\n", pkt->getUintX(byteOrder));
pkt->makeResponse();
return pioDelay;
}
} // namespace gem5

93
src/dev/lupio/lupio_ipi.hh Normal file
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/*
* Copyright (c) 2021 The Regents of the University of California
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __DEV_LUPIO_LUPIO_IPI_HH__
#define __DEV_LUPIO_LUPIO_IPI_HH__
#include "arch/riscv/interrupts.hh"
#include "dev/io_device.hh"
#include "dev/platform.hh"
#include "params/LupioIPI.hh"
namespace gem5
{
/**
* LupioIPI:
* An inter-processor interrupt virtual device
*/
class LupioIPI : public BasicPioDevice
{
private:
const ByteOrder byteOrder = ByteOrder::little;
System *system;
int intType;
// Register map
enum
{
LUPIO_IPI_WORD,
// Max offset
LUPIO_IPI_MAX,
};
uint32_t nThread;
/**
* Set of registers corresponding to each CPU for sending
* inter-processor interrupts
*/
std::vector<uint32_t> word;
/**
* Function to return the value in the word register of the corresponding
* CPU and lower the IRQ
*/
uint64_t lupioIPIRead(const uint8_t addr, int size);
/**
* Function to write to the word register of the corresponding CPU and
* raise the IRQ
*/
void lupioIPIWrite(const uint8_t addr, uint64_t val64, int size);
public:
PARAMS(LupioIPI);
LupioIPI(const Params &params);
/**
* Implement BasicPioDevice virtual functions
*/
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
};
} // namespace gem5
#endif // __DEV_LUPIO_LUPIO_IPI_HH