a1a0dd8d97
This patch is allowing non word sized accesses to the AMBA ID registers. Change-Id: I61a7163a3b4120e8dbcdbd6d9b83d33a7996f979 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/31175 Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>
87 lines
3.4 KiB
C++
87 lines
3.4 KiB
C++
/*
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* Copyright (c) 2010 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Copyright (c) 2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "dev/arm/amba_device.hh"
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#include "base/trace.hh"
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#include "debug/AMBA.hh"
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#include "dev/arm/amba_fake.hh"
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#include "mem/packet.hh"
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#include "mem/packet_access.hh"
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const uint64_t AmbaVendor = ULL(0xb105f00d00000000);
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AmbaPioDevice::AmbaPioDevice(const Params *p, Addr pio_size)
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: BasicPioDevice(p, pio_size), ambaId(AmbaVendor | p->amba_id)
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{
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}
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AmbaIntDevice::AmbaIntDevice(const Params *p, Addr pio_size)
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: AmbaPioDevice(p, pio_size),
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interrupt(p->interrupt->get()), intDelay(p->int_delay)
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{
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}
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AmbaDmaDevice::AmbaDmaDevice(const Params *p, Addr pio_size)
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: DmaDevice(p), ambaId(AmbaVendor | p->amba_id),
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pioAddr(p->pio_addr), pioSize(pio_size),
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pioDelay(p->pio_latency), interrupt(p->interrupt->get())
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{
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}
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bool
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AmbaDevice::readId(PacketPtr pkt, uint64_t amba_id, Addr pio_addr)
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{
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Addr daddr = pkt->getAddr() - pio_addr;
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if (daddr < AMBA_PER_ID0 || daddr > AMBA_CEL_ID3)
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return false;
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int byte = (daddr - AMBA_PER_ID0) << 1;
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// Too noisy right now
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DPRINTF(AMBA, "Returning %#x for offset %#x(%d)\n",
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(amba_id >> byte) & 0xFF,
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pkt->getAddr() - pio_addr, byte);
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pkt->setUintX((amba_id >> byte) & 0xFF, LittleEndianByteOrder);
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return true;
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}
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