From: Ali Saidi Date: Thu, 5 May 2011 01:38:27 +0000 (-0500) Subject: ARM: Add snoop control unit device. X-Git-Tag: stable_2012_02_02~342 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5f73d4ac9741f58fd00ccd03eac92c0c60817658;p=gem5.git ARM: Add snoop control unit device. --- diff --git a/src/dev/arm/RealView.py b/src/dev/arm/RealView.py index 8a43c5b8d..dd694cd45 100644 --- a/src/dev/arm/RealView.py +++ b/src/dev/arm/RealView.py @@ -70,6 +70,9 @@ class AmbaDmaDevice(DmaDevice): int_num = Param.UInt32("Interrupt number that connects to GIC") amba_id = Param.UInt32("ID of AMBA device for kernel detection") +class A9SCU(BasicPioDevice): + type = 'A9SCU' + class RealViewCtrl(BasicPioDevice): type = 'RealViewCtrl' proc_id = Param.UInt32(0x0C000000, "Platform ID") @@ -132,6 +135,7 @@ class RealViewPBX(RealView): clcd = Pl111(pio_addr=0x10020000, int_num=55) kmi0 = Pl050(pio_addr=0x10006000, int_num=52) kmi1 = Pl050(pio_addr=0x10007000, int_num=53, is_mouse=True) + a9scu = A9SCU(pio_addr=0x1f000000) cf_ctrl = IdeController(disks=[], pci_func=0, pci_dev=0, pci_bus=0, io_shift = 1, ctrl_offset = 2, Command = 0x1, BAR0 = 0x18000000, BAR0Size = '16B', @@ -162,6 +166,7 @@ class RealViewPBX(RealView): def attachOnChipIO(self, bus): self.gic.pio = bus.port self.l2x0_fake.pio = bus.port + self.a9scu.pio = bus.port # Attach I/O devices to specified bus object. Can't do this # earlier, since the bus object itself is typically defined at the diff --git a/src/dev/arm/SConscript b/src/dev/arm/SConscript index b53010d77..df4b7f22c 100644 --- a/src/dev/arm/SConscript +++ b/src/dev/arm/SConscript @@ -42,6 +42,7 @@ Import('*') if env['FULL_SYSTEM'] and env['TARGET_ISA'] == 'arm': SimObject('RealView.py') + Source('a9scu.cc') Source('amba_device.cc') Source('amba_fake.cc') Source('gic.cc') diff --git a/src/dev/arm/a9scu.cc b/src/dev/arm/a9scu.cc new file mode 100644 index 000000000..31d38b4ff --- /dev/null +++ b/src/dev/arm/a9scu.cc @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2010 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 "base/intmath.hh" +#include "base/trace.hh" +#include "dev/arm/a9scu.hh" +#include "mem/packet.hh" +#include "mem/packet_access.hh" +#include "sim/system.hh" + +A9SCU::A9SCU(Params *p) + : BasicPioDevice(p) +{ + pioSize = 0x60; +} + +Tick +A9SCU::read(PacketPtr pkt) +{ + assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); + assert(pkt->getSize() == 4); + Addr daddr = pkt->getAddr() - pioAddr; + pkt->allocate(); + + switch(daddr) { + case Control: + pkt->set(1); // SCU already enabled + break; + case Config: + assert(sys->numContexts() <= 4); + int smp_bits, core_cnt; + smp_bits = power(2,sys->numContexts()) - 1; + core_cnt = sys->numContexts() - 1; + pkt->set(smp_bits << 4 | core_cnt); + break; + default: + // Only configuration register is implemented + panic("Tried to read SCU at offset %#x\n", daddr); + break; + } + pkt->makeAtomicResponse(); + return pioDelay; + +} + +Tick +A9SCU::write(PacketPtr pkt) +{ + assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); + + Addr daddr = pkt->getAddr() - pioAddr; + switch (daddr) { + default: + // Nothing implemented at this point + panic("Tried to write SCU at offset %#x\n", daddr); + break; + } + pkt->makeAtomicResponse(); + return pioDelay; +} + +A9SCU * +A9SCUParams::create() +{ + return new A9SCU(this); +} diff --git a/src/dev/arm/a9scu.hh b/src/dev/arm/a9scu.hh new file mode 100644 index 000000000..881401ca6 --- /dev/null +++ b/src/dev/arm/a9scu.hh @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2010 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 + */ + +#ifndef __DEV_ARM_A9SCU_HH__ +#define __DEV_ARM_A9SCU_HH__ + +#include "base/range.hh" +#include "dev/io_device.hh" +#include "params/A9SCU.hh" + +/** @file + * This defines the snoop control unit register on an A9 + */ + +class A9SCU : public BasicPioDevice +{ + protected: + enum { + Control = 0x00, + Config = 0x04, + }; + + public: + typedef A9SCUParams Params; + + /** + * The constructor for RealView just registers itself with the MMU. + * @param p params structure + */ + A9SCU(Params *p); + + /** + * Handle a read to the device + * @param pkt The memory request. + * @param data Where to put the data. + */ + virtual Tick read(PacketPtr pkt); + + /** + * All writes are panic. + * @param pkt The memory request. + * @param data the data + */ + virtual Tick write(PacketPtr pkt); +}; + + +#endif // __DEV_ARM_A9SCU_HH__ +