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ARM: Add snoop control unit device.

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This commit is contained in:
Ali Saidi 2011-05-04 20:38:27 -05:00
parent afd08879d7
commit 5f73d4ac97
4 changed files with 193 additions and 0 deletions
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5
src/dev/arm/RealView.py
View file

@ -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

1
src/dev/arm/SConscript
View file

@ -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')

102
src/dev/arm/a9scu.cc Normal file
View file

@ -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);
}

85
src/dev/arm/a9scu.hh Normal file
View file

@ -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__