Giacomo Travaglini has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/34378 )
Change subject: dev-arm: Implement Arm MHU (Message Handling Unit)
......................................................................
dev-arm: Implement Arm MHU (Message Handling Unit)
JIRA: https://gem5.atlassian.net/browse/GEM5-768
Change-Id: I895eba1a3421746a602e6a4f88916da9054169a8
Signed-off-by: Giacomo Travaglini <giacomo.travagl...@arm.com>
---
A src/dev/arm/css/MHU.py
A src/dev/arm/css/SConscript
A src/dev/arm/css/Scp.py
A src/dev/arm/css/mhu.cc
A src/dev/arm/css/mhu.hh
A src/dev/arm/css/scp.hh
6 files changed, 687 insertions(+), 0 deletions(-)
diff --git a/src/dev/arm/css/MHU.py b/src/dev/arm/css/MHU.py
new file mode 100644
index 0000000..878ca22
--- /dev/null
+++ b/src/dev/arm/css/MHU.py
@@ -0,0 +1,113 @@
+# 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.
+
+from m5.objects.Device import BasicPioDevice
+from m5.objects.Doorbell import Doorbell
+from m5.params import *
+from m5.proxy import *
+from m5.util.fdthelper import *
+
+class MhuDoorbell(Doorbell):
+ type = 'MhuDoorbell'
+ abstract = True
+ cxx_header = "dev/arm/css/mhu.hh"
+
+class Scp2ApDoorbell(MhuDoorbell):
+ type = 'Scp2ApDoorbell'
+ cxx_header = "dev/arm/css/mhu.hh"
+
+ interrupt = Param.ArmInterruptPin("Interrupt Pin")
+
+class Ap2ScpDoorbell(MhuDoorbell):
+ type = 'Ap2ScpDoorbell'
+ cxx_header = "dev/arm/css/mhu.hh"
+
+# Message Handling Unit
+class MHU(BasicPioDevice):
+ type = 'MHU'
+ cxx_header = "dev/arm/css/mhu.hh"
+ pio_size = Param.Unsigned(0x1000, "MHU pio size")
+
+ lowp_scp2ap = Param.Scp2ApDoorbell(
+ "Low Priority doorbell channel for communications "
+ "from the System Control Processor (SCP) to the "
+ "Application Processor (AP)")
+ highp_scp2ap = Param.Scp2ApDoorbell(
+ "High Priority doorbell channel for communications "
+ "from the System Control Processor (SCP) to the "
+ "Application Processor (AP)")
+ sec_scp2ap = Param.Scp2ApDoorbell(
+ "Secure doorbell channel for communications "
+ "from the System Control Processor (SCP) to the "
+ "Application Processor (AP)")
+
+ lowp_ap2scp = Param.Ap2ScpDoorbell(
+ "Low Priority doorbell channel for communications "
+ "from the Application Processor (AP) to the "
+ "System Control Processor (SCP)")
+ highp_ap2scp = Param.Ap2ScpDoorbell(
+ "High Priority doorbell channel for communications "
+ "from the Application Processor (AP) to the "
+ "System Control Processor (SCP)")
+ sec_ap2scp = Param.Ap2ScpDoorbell(
+ "Secure doorbell channel for communications "
+ "from the Application Processor (AP) to the "
+ "System Control Processor (SCP)")
+
+ scp = Param.Scp(Parent.any, "System Control Processor")
+
+ def generateDeviceTree(self, state):
+ node = FdtNode("mailbox@%x" % long(self.pio_addr))
+ node.appendCompatible(["arm,mhu", "arm,primecell"])
+ node.append(FdtPropertyWords("reg",
+ state.addrCells(self.pio_addr) +
+ state.sizeCells(self.pio_size) ))
+ node.append(FdtPropertyWords("#mbox-cells", 1))
+
+ node.append(FdtPropertyWords("interrupts", [
+ 0, int(self.lowp_scp2ap.interrupt.num) - 32, 1,
+ 0, int(self.highp_scp2ap.interrupt.num) - 32, 1,
+ 0, int(self.sec_scp2ap.interrupt.num) - 32, 1,
+ ]))
+
+ realview = self._parent.unproxy(self)
+ node.append(FdtPropertyWords("clocks",
+ [state.phandle(realview.mcc.osc_peripheral),
+ state.phandle(realview.dcc.osc_smb)]))
+ node.append(FdtPropertyStrings("clock-names", ["apb_pclk"]))
+
+ node.appendPhandle(self)
+
+ yield node
diff --git a/src/dev/arm/css/SConscript b/src/dev/arm/css/SConscript
new file mode 100644
index 0000000..1c34297
--- /dev/null
+++ b/src/dev/arm/css/SConscript
@@ -0,0 +1,46 @@
+# -*- mode:python -*-
+
+# 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.
+
+Import('*')
+
+if env['TARGET_ISA'] == 'arm':
+ SimObject('MHU.py')
+ SimObject('Scp.py')
+
+ Source('mhu.cc')
+
+ DebugFlag('MHU')
diff --git a/src/dev/arm/css/Scp.py b/src/dev/arm/css/Scp.py
new file mode 100644
index 0000000..3e42e27
--- /dev/null
+++ b/src/dev/arm/css/Scp.py
@@ -0,0 +1,42 @@
+# 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.
+
+from m5.objects.ClockedObject import ClockedObject
+from m5.params import *
+
+class Scp(ClockedObject):
+ type = 'Scp'
+ abstract = True
+ cxx_header = "dev/arm/css/scp.hh"
diff --git a/src/dev/arm/css/mhu.cc b/src/dev/arm/css/mhu.cc
new file mode 100644
index 0000000..4aae91f
--- /dev/null
+++ b/src/dev/arm/css/mhu.cc
@@ -0,0 +1,259 @@
+/*
+ * 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/css/mhu.hh"
+
+#include "debug/MHU.hh"
+#include "dev/arm/base_gic.hh"
+#include "dev/arm/css/scp.hh"
+#include "mem/packet_access.hh"
+#include "params/Ap2ScpDoorbell.hh"
+#include "params/MHU.hh"
+#include "params/Scp2ApDoorbell.hh"
+
+Scp2ApDoorbell::Scp2ApDoorbell(const Scp2ApDoorbellParams *p)
+ : MhuDoorbell(p), interrupt(p->interrupt->get())
+{}
+
+Ap2ScpDoorbell::Ap2ScpDoorbell(const Ap2ScpDoorbellParams *p)
+ : MhuDoorbell(p)
+{}
+
+MHU::MHU(const MHUParams *p)
+ : BasicPioDevice(p, p->pio_size),
+ scpLow(p->lowp_scp2ap),
+ scpHigh(p->highp_scp2ap),
+ scpSec(p->sec_scp2ap),
+ apLow(p->lowp_ap2scp),
+ apHigh(p->highp_ap2scp),
+ apSec(p->sec_ap2scp),
+ pid{ 0x98, 0xb0, 0x1b, 0x0, 0x4 },
+ compid{ 0x0d, 0xf0, 0x05, 0xb1 },
+ scfg(0)
+{
+ apLow->setScp(p->scp);
+ apHigh->setScp(p->scp);
+ apSec->setScp(p->scp);
+}
+
+AddrRangeList
+MHU::getAddrRanges() const
+{
+ return AddrRangeList({ RangeSize(pioAddr, pioSize) });
+}
+
+Tick
+MHU::read(PacketPtr pkt)
+{
+ const Addr addr = pkt->getAddr() - pioAddr;
+ const bool secure = pkt->isSecure();
+
+ uint32_t value = read32(addr, secure);
+
+ DPRINTF(MHU, "Reading %#x at address: %#x\n", value, addr);
+
+ pkt->setUintX(value, ByteOrder::little);
+ pkt->makeAtomicResponse();
+ return pioDelay;
+}
+
+uint32_t
+MHU::read32(const Addr addr, bool secure_access)
+{
+ switch (addr) {
+ case SCP_INTR_L_STAT:
+ return scpLow->channel;
+ case SCP_INTR_H_STAT:
+ return scpHigh->channel;
+ case CPU_INTR_L_STAT:
+ return apLow->channel;
+ case CPU_INTR_H_STAT:
+ return apHigh->channel;
+ case SCP_INTR_S_STAT:
+ if (secure_access) {
+ return scpSec->channel;
+ } else {
+ if (!bits(scfg, 0))
+ scpSec->set(SVI_INT);
+ return 0;
+ }
+ case CPU_INTR_S_STAT:
+ if (secure_access) {
+ return apSec->channel;
+ } else {
+ if (!bits(scfg, 0))
+ scpSec->set(SVI_INT);
+ return 0;
+ }
+ case MHU_SCFG:
+ return scfg;
+ case PID4:
+ return pid[4];
+ case PID0:
+ return pid[0];
+ case PID1:
+ return pid[1];
+ case PID2:
+ return pid[2];
+ case PID3:
+ return pid[3];
+ case COMPID0:
+ return compid[0];
+ case COMPID1:
+ return compid[1];
+ case COMPID2:
+ return compid[2];
+ case COMPID3:
+ return compid[3];
+ default:
+ panic("Invalid register read at address: %#x\n", addr);
+ }
+}
+
+Tick
+MHU::write(PacketPtr pkt)
+{
+ const Addr addr = pkt->getAddr() - pioAddr;
+
+ assert(pkt->getSize() == sizeof(uint32_t));
+ const uint32_t value = pkt->getLE<uint32_t>();
+
+ DPRINTF(MHU, "Writing %#x at address: %#x\n", value, addr);
+
+ switch (addr) {
+ case SCP_INTR_L_SET:
+ scpLow->set(value);
+ break;
+ case SCP_INTR_L_CLEAR:
+ scpLow->clear(value);
+ break;
+ case SCP_INTR_H_SET:
+ scpHigh->set(value);
+ break;
+ case SCP_INTR_H_CLEAR:
+ scpHigh->clear(value);
+ break;
+ case CPU_INTR_L_SET:
+ apLow->set(value);
+ break;
+ case CPU_INTR_L_CLEAR:
+ apLow->clear(value);
+ break;
+ case CPU_INTR_H_SET:
+ apHigh->set(value);
+ break;
+ case CPU_INTR_H_CLEAR:
+ apHigh->clear(value);
+ break;
+ case SCP_INTR_S_SET:
+ scpSec->set(value);
+ break;
+ case SCP_INTR_S_CLEAR:
+ scpSec->clear(value);
+ break;
+ case CPU_INTR_S_SET:
+ apSec->set(value);
+ break;
+ case CPU_INTR_S_CLEAR:
+ apSec->clear(value);
+ break;
+ case MHU_SCFG:
+ scfg = value;
+ break;
+ default:
+ panic("Invalid register write at address: %#x\n", addr);
+ }
+
+ pkt->makeAtomicResponse();
+ return pioDelay;
+}
+
+void
+MhuDoorbell::update(uint32_t new_val)
+{
+ const bool int_old = channel != 0;
+ const bool int_new = new_val != 0;
+
+ channel = new_val;
+ if (int_old && !int_new) {
+ clearInterrupt();
+ } else if (!int_old && int_new) {
+ raiseInterrupt();
+ }
+}
+
+void
+Scp2ApDoorbell::raiseInterrupt()
+{
+ interrupt->raise();
+}
+
+void
+Scp2ApDoorbell::clearInterrupt()
+{
+ interrupt->clear();
+}
+
+void
+Ap2ScpDoorbell::raiseInterrupt()
+{
+ scp->raiseInterrupt(this);
+}
+
+void
+Ap2ScpDoorbell::clearInterrupt()
+{
+ scp->clearInterrupt(this);
+}
+
+Scp2ApDoorbell *
+Scp2ApDoorbellParams::create()
+{
+ return new Scp2ApDoorbell(this);
+}
+
+Ap2ScpDoorbell *
+Ap2ScpDoorbellParams::create()
+{
+ return new Ap2ScpDoorbell(this);
+}
+
+MHU *
+MHUParams::create()
+{
+ return new MHU(this);
+}
diff --git a/src/dev/arm/css/mhu.hh b/src/dev/arm/css/mhu.hh
new file mode 100644
index 0000000..965cbf3
--- /dev/null
+++ b/src/dev/arm/css/mhu.hh
@@ -0,0 +1,169 @@
+/*
+ * 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.
+ */
+
+#ifndef __DEV_ARM_CSS_MHU_H__
+#define __DEV_ARM_CSS_MHU_H__
+
+#include "dev/arm/doorbell.hh"
+#include "dev/io_device.hh"
+
+class Ap2ScpDoorbellParams;
+class ArmInterruptPin;
+class MHU;
+class MHUParams;
+class Scp;
+class Scp2ApDoorbellParams;
+
+class MhuDoorbell : public Doorbell
+{
+ public:
+ friend class MHU;
+
+ MhuDoorbell(const DoorbellParams *p)
+ : Doorbell(p), channel(0)
+ {}
+
+ void set(uint32_t val) override { update(channel | val); }
+ void clear(uint32_t val) override { update(channel & ~val); }
+
+ protected:
+ void update(uint32_t new_val);
+
+ virtual void raiseInterrupt() = 0;
+ virtual void clearInterrupt() = 0;
+
+ uint32_t channel;
+};
+
+class Scp2ApDoorbell : public MhuDoorbell
+{
+ public:
+ Scp2ApDoorbell(const Scp2ApDoorbellParams *p);
+
+ void raiseInterrupt() override;
+ void clearInterrupt() override;
+
+ private:
+ ArmInterruptPin *interrupt;
+};
+
+class Ap2ScpDoorbell : public MhuDoorbell
+{
+ public:
+ Ap2ScpDoorbell(const Ap2ScpDoorbellParams *p);
+
+ void setScp(Scp *_scp) { scp = _scp; }
+
+ void raiseInterrupt() override;
+ void clearInterrupt() override;
+
+ private:
+ Scp *scp;
+};
+
+/** Message Handling Unit */
+class MHU : public BasicPioDevice
+{
+ public:
+ enum
+ {
+ /** From SCP to Application Processor */
+ SCP_INTR_L_STAT = 0x0,
+ SCP_INTR_L_SET = 0x8,
+ SCP_INTR_L_CLEAR = 0x10,
+ SCP_INTR_H_STAT = 0x20,
+ SCP_INTR_H_SET = 0x28,
+ SCP_INTR_H_CLEAR = 0x30,
+
+ /** From Application Processor to SCP */
+ CPU_INTR_L_STAT = 0x100,
+ CPU_INTR_L_SET = 0x108,
+ CPU_INTR_L_CLEAR = 0x110,
+ CPU_INTR_H_STAT = 0x120,
+ CPU_INTR_H_SET = 0x128,
+ CPU_INTR_H_CLEAR = 0x130,
+
+ SCP_INTR_S_STAT = 0x200,
+ SCP_INTR_S_SET = 0x208,
+ SCP_INTR_S_CLEAR = 0x210,
+ CPU_INTR_S_STAT = 0x300,
+ CPU_INTR_S_SET = 0x308,
+ CPU_INTR_S_CLEAR = 0x310,
+
+ MHU_SCFG = 0x400,
+
+ PID4 = 0xfd0,
+ PID0 = 0xfe0,
+ PID1 = 0xfe4,
+ PID2 = 0xfe8,
+ PID3 = 0xfec,
+
+ COMPID0 = 0xff0,
+ COMPID1 = 0xff4,
+ COMPID2 = 0xff8,
+ COMPID3 = 0xffc
+ };
+
+ // Secure Violation Interrupt: used when accessing
+ // a secure channel in non secure mode
+ static const uint32_t SVI_INT = 0x80000000;
+
+ MHU(const MHUParams *p);
+
+ AddrRangeList getAddrRanges() const override;
+
+ Tick read(PacketPtr pkt) override;
+ Tick write(PacketPtr pkt) override;
+
+ uint32_t read32(const Addr addr, bool secure_access);
+
+ Scp2ApDoorbell *scpLow;
+ Scp2ApDoorbell *scpHigh;
+ Scp2ApDoorbell *scpSec;
+
+ Ap2ScpDoorbell *apLow;
+ Ap2ScpDoorbell *apHigh;
+ Ap2ScpDoorbell *apSec;
+
+ // MHU.PIDn, MHU.COMPIDn registers
+ uint32_t pid[5];
+ uint32_t compid[4];
+
+ uint32_t scfg;
+};
+
+#endif // __DEV_ARM_CSS_MHU_H__
diff --git a/src/dev/arm/css/scp.hh b/src/dev/arm/css/scp.hh
new file mode 100644
index 0000000..de1c4ca
--- /dev/null
+++ b/src/dev/arm/css/scp.hh
@@ -0,0 +1,58 @@
+/*
+ * 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.
+ */
+
+#ifndef __DEV_ARM_CSS_SCP_H__
+#define __DEV_ARM_CSS_SCP_H__
+
+#include "sim/clocked_object.hh"
+
+class Doorbell;
+
+class Scp : public ClockedObject
+{
+ public:
+ Scp(const ClockedObjectParams *p)
+ : ClockedObject(p)
+ {}
+
+ virtual ~Scp() {}
+
+ virtual void raiseInterrupt(const Doorbell *doorbell) = 0;
+ virtual void clearInterrupt(const Doorbell *doorbell) = 0;
+};
+
+#endif // __DEV_ARM_CSS_SCP_H__
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I895eba1a3421746a602e6a4f88916da9054169a8
Gerrit-Change-Number: 34378
Gerrit-PatchSet: 1
Gerrit-Owner: Giacomo Travaglini <giacomo.travagl...@arm.com>
Gerrit-MessageType: newchange
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