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
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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"
 
namespace gem5
{
 
const uint64_t AmbaVendor = 0xb105f00d00000000ULL;
 
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),
      interrupt(p.interrupt->get()), 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), interrupt(p.interrupt->get())
{
}
 
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);
 
    pkt->setUintX((amba_id >> byte) & 0xFF, ByteOrder::little);
    return true;
}
 
} // namespace gem5