-# Copyright (c) 2012 ARM Limited
+# Copyright (c) 2012-2013 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
from m5.params import *
from m5.proxy import *
+from m5.SimObject import SimObject
from Device import PioDevice
from Platform import Platform
cpu_pio_delay = Param.Latency('10ns', "Delay for PIO r/w to cpu interface")
int_latency = Param.Latency('10ns', "Delay for interrupt to get to CPU")
it_lines = Param.UInt32(128, "Number of interrupt lines supported (max = 1020)")
+
+class Gicv2mFrame(SimObject):
+ type = 'Gicv2mFrame'
+ cxx_header = "dev/arm/gic_v2m.hh"
+ spi_base = Param.UInt32(0x0, "Frame SPI base number");
+ spi_len = Param.UInt32(0x0, "Frame SPI total number");
+ addr = Param.Addr("Address for frame PIO")
+
+class Gicv2m(PioDevice):
+ type = 'Gicv2m'
+ cxx_header = "dev/arm/gic_v2m.hh"
+
+ pio_delay = Param.Latency('10ns', "Delay for PIO r/w")
+ gic = Param.BaseGic(Parent.any, "Gic on which to trigger interrupts")
+ frames = VectorParam.Gicv2mFrame([], "Power of two number of frames")
--- /dev/null
+/*
+ * Copyright (c) 2013 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: Matt Evans
+ */
+
+/** @file
+ * Implementiation of a GICv2m MSI shim.
+ *
+ * This shim adds MSI support to GICv2.
+ *
+ * This should be instantiated with the appropriate number of frames,
+ * and SPI numbers thereof, to the system being modelled.
+ *
+ * For example, in RealView.py (or whichever board setup is used), instantiate:
+ *
+ * gicv2m = Gicv2m(frames=[
+ * Gicv2mFrame(addr=0x12340000, spi_base=320, spi_len=64),
+ * Gicv2mFrame(addr=0x12350000, spi_base=100, spi_len=32),
+ * Gicv2mFrame(addr=0x12360000, spi_base=150, spi_len=16),
+ * Gicv2mFrame(addr=0x12370000, spi_base=190, spi_len=8),
+ * ])
+ *
+ */
+
+#include "dev/arm/gic_v2m.hh"
+
+#include "base/bitunion.hh"
+#include "base/intmath.hh"
+#include "debug/Checkpoint.hh"
+#include "debug/GICV2M.hh"
+#include "dev/io_device.hh"
+#include "mem/packet.hh"
+#include "mem/packet_access.hh"
+
+Gicv2m *
+Gicv2mParams::create()
+{
+ return new Gicv2m(this);
+}
+
+Gicv2mFrame *
+Gicv2mFrameParams::create()
+{
+ return new Gicv2mFrame(this);
+}
+
+Gicv2m::Gicv2m(const Params *p)
+ : PioDevice(p), pioDelay(p->pio_delay), frames(p->frames), gic(p->gic)
+{
+ // Assert SPI ranges start at 32
+ for (int i = 0; i < frames.size(); i++) {
+ if (frames[i]->spi_base < 32)
+ fatal("Gicv2m: Frame %d's SPI base (%d) is not in SPI space\n",
+ i, frames[i]->spi_base);
+ }
+ unsigned int x = frames.size();
+ fatal_if(!isPowerOf2(x), "Gicv2m: The v2m shim must be configured with "
+ "a power-of-two number of frames\n");
+ log2framenum = floorLog2(x);
+}
+
+AddrRangeList
+Gicv2m::getAddrRanges() const
+{
+ AddrRangeList ranges;
+ for (int i = 0; i < frames.size(); i++) {
+ ranges.push_back(RangeSize(frames[i]->addr, FRAME_SIZE));
+ }
+ return ranges;
+}
+
+Tick
+Gicv2m::read(PacketPtr pkt)
+{
+ int frame = frameFromAddr(pkt->getAddr());
+
+ assert(frame >= 0);
+
+ Addr offset = pkt->getAddr() - frames[frame]->addr;
+
+ switch (offset) {
+ case MSI_TYPER:
+ pkt->set<uint32_t>((frames[frame]->spi_base << 16) |
+ frames[frame]->spi_len);
+ break;
+
+ case PER_ID4:
+ pkt->set<uint32_t>(0x4 | ((4+log2framenum) << 4));
+ // Nr of 4KB blocks used by component. This is messy as frames are 64K
+ // (16, ie 2^4) and we should assert we're given a Po2 number of frames.
+ break;
+ default:
+ DPRINTF(GICV2M, "GICv2m: Read of unk reg %#x\n", offset);
+ pkt->set<uint32_t>(0);
+ };
+
+ pkt->makeAtomicResponse();
+
+ return pioDelay;
+}
+
+Tick
+Gicv2m::write(PacketPtr pkt)
+{
+ int frame = frameFromAddr(pkt->getAddr());
+
+ assert(frame >= 0);
+
+ Addr offset = pkt->getAddr() - frames[frame]->addr;
+
+ if (offset == MSI_SETSPI_NSR) {
+ /* Is payload SPI number within range? */
+ uint32_t m = pkt->get<uint32_t>();
+ if (m >= frames[frame]->spi_base &&
+ m < (frames[frame]->spi_base + frames[frame]->spi_len)) {
+ DPRINTF(GICV2M, "GICv2m: Frame %d raising MSI %d\n", frame, m);
+ gic->sendInt(m);
+ }
+ } else {
+ DPRINTF(GICV2M, "GICv2m: Write of unk reg %#x\n", offset);
+ }
+
+ pkt->makeAtomicResponse();
+
+ return pioDelay;
+}
+
+int
+Gicv2m::frameFromAddr(Addr a) const
+{
+ for (int i = 0; i < frames.size(); i++) {
+ if (a >= frames[i]->addr && a < (frames[i]->addr + FRAME_SIZE))
+ return i;
+ }
+ return -1;
+}
--- /dev/null
+/*
+ * Copyright (c) 2013 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: Matt Evans
+ */
+
+/** @file
+ * Implementiation of a GICv2m MSI shim.
+ *
+ * See gic_v2m.cc for an instantiation example.
+ */
+
+#ifndef __DEV_ARM_GIC_V2M_H__
+#define __DEV_ARM_GIC_V2M_H__
+
+#include "base/bitunion.hh"
+#include "cpu/intr_control.hh"
+#include "dev/arm/base_gic.hh"
+#include "dev/io_device.hh"
+#include "dev/platform.hh"
+#include "params/Gicv2m.hh"
+#include "params/Gicv2mFrame.hh"
+
+/**
+ * Ultimately this class should be embedded in the Gicv2m class, but
+ * this confuses Python as 'Gicv2m::Frame' gets interpreted as 'Frame'
+ * in namespace Gicv2m.
+ */
+class Gicv2mFrame : public SimObject
+{
+ public:
+ const Addr addr;
+ const unsigned int spi_base;
+ const unsigned int spi_len;
+
+ typedef Gicv2mFrameParams Params;
+ Gicv2mFrame(const Params *p) :
+ SimObject(p), addr(p->addr), spi_base(p->spi_base), spi_len(p->spi_len)
+ {}
+};
+
+class Gicv2m : public PioDevice
+{
+ private:
+ static const int FRAME_SIZE = 0x10000;
+
+ static const int MSI_TYPER = 0x0008;
+ static const int MSI_SETSPI_NSR = 0x0040;
+ static const int PER_ID4 = 0x0fd0;
+
+ /** Latency for an MMIO operation */
+ const Tick pioDelay;
+
+ /** A set of configured hardware frames */
+ std::vector<Gicv2mFrame *> frames;
+
+ /** Gic to which we fire interrupts */
+ BaseGic *gic;
+
+ /** Count of number of configured frames, as log2(frames) */
+ unsigned int log2framenum;
+
+ public:
+ typedef Gicv2mParams Params;
+ Gicv2m(const Params *p);
+
+ /** @{ */
+ /** Return the address ranges used by the Gicv2m
+ * This is the set of frame addresses
+ */
+ virtual AddrRangeList getAddrRanges() const;
+
+ /** A PIO read to the device
+ */
+ virtual Tick read(PacketPtr pkt);
+
+ /** A PIO read to the device
+ */
+ virtual Tick write(PacketPtr pkt);
+ /** @} */
+
+ private:
+ /** Determine which frame a PIO access lands in
+ */
+ int frameFromAddr(Addr a) const;
+};
+
+#endif //__DEV_ARM_GIC_V2M_H__
projects / gem5.git / commitdiff