amba_device.cc

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/*
 * Copyright (c) 2010 ARM Limited
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 * 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
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 * Copyright (c) 2005 The Regents of The University of Michigan
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#include "dev/arm/amba_device.hh"

#include "base/trace.hh"
#include "debug/AMBA.hh"
#include "dev/arm/amba_fake.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"

const uint64_t AmbaVendor = ULL(0xb105f00d00000000);

AmbaPioDevice::AmbaPioDevice(const Params *p, Addr pio_size)
    : BasicPioDevice(p, pio_size), ambaId(AmbaVendor | p->amba_id)
{
}

AmbaIntDevice::AmbaIntDevice(const Params *p, Addr pio_size)
    : AmbaPioDevice(p, pio_size),
      intNum(p->int_num), gic(p->gic), intDelay(p->int_delay)
{
}



AmbaDmaDevice::AmbaDmaDevice(const Params *p, Addr pio_size)
    : DmaDevice(p), ambaId(AmbaVendor | p->amba_id),
      pioAddr(p->pio_addr), pioSize(pio_size),
      pioDelay(p->pio_latency),intNum(p->int_num), gic(p->gic)
{
}

bool
AmbaDevice::readId(PacketPtr pkt, uint64_t amba_id, Addr pio_addr)
{
    Addr daddr = pkt->getAddr() - pio_addr;
    if (daddr < AMBA_PER_ID0 || daddr > AMBA_CEL_ID3)
        return false;

    int byte = (daddr - AMBA_PER_ID0) << 1;
    // Too noisy right now
    DPRINTF(AMBA, "Returning %#x for offset %#x(%d)\n",
            (amba_id >> byte) & 0xFF,
            pkt->getAddr() - pio_addr, byte);
    assert(pkt->getSize() == 4);
    pkt->setLE<uint32_t>((amba_id >> byte) & 0xFF);
    return true;
}