amba_device.cc revision 9808 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#include "base/trace.hh"
44#include "debug/AMBA.hh"
45#include "dev/arm/amba_device.hh"
46#include "dev/arm/amba_fake.hh"
47#include "mem/packet.hh"
48#include "mem/packet_access.hh"
49
50const uint64_t AmbaVendor = ULL(0xb105f00d00000000);
51
52AmbaPioDevice::AmbaPioDevice(const Params *p, Addr pio_size)
53    : BasicPioDevice(p, pio_size), ambaId(AmbaVendor | p->amba_id)
54{
55}
56
57AmbaIntDevice::AmbaIntDevice(const Params *p, Addr pio_size)
58    : AmbaPioDevice(p, pio_size),
59      intNum(p->int_num), gic(p->gic), intDelay(p->int_delay)
60{
61}
62
63
64
65AmbaDmaDevice::AmbaDmaDevice(const Params *p)
66    : DmaDevice(p), ambaId(AmbaVendor | p->amba_id),
67      pioAddr(p->pio_addr), pioSize(0),
68      pioDelay(p->pio_latency),intNum(p->int_num), gic(p->gic)
69{
70}
71
72bool
73AmbaDevice::readId(PacketPtr pkt, uint64_t amba_id, Addr pio_addr)
74{
75    Addr daddr = pkt->getAddr() - pio_addr;
76    if (daddr < AMBA_PER_ID0 || daddr > AMBA_CEL_ID3)
77        return false;
78
79    pkt->allocate();
80
81    int byte = (daddr - AMBA_PER_ID0) << 1;
82    // Too noisy right now
83    DPRINTF(AMBA, "Returning %#x for offset %#x(%d)\n",
84            (amba_id >> byte) & 0xFF,
85            pkt->getAddr() - pio_addr, byte);
86    assert(pkt->getSize() == 4);
87    pkt->set<uint32_t>((amba_id >> byte) & 0xFF);
88    return true;
89}
90