up_down_bridge.cc

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#include "dev/pci/up_down_bridge.hh"
 
#include "base/addr_range.hh"
#include "base/logging.hh"
#include "debug/PciUpstream.hh"
#include "params/PciUpDownBridge.hh"
 
namespace gem5
{
 
PciUpDownBridge::PciUpDownBridge(const Params &p)
    : BridgeBase(p), memSideRanges(), configRange()
{}
 
void
PciUpDownBridge::setConfigRange(AddrRange config_range)
{
    this->configRange = config_range;
    cpuSidePort.sendRangeChange();
}
 
AddrRangeList
PciUpDownBridge::getAddrRanges() const
{
    AddrRangeList ranges = memSideRanges;
 
    if (configRange.valid()) {
        // Add whole configuration range, but avoid range duplication for
        // existing PCI devices.
        ranges -= configRange;
        ranges.push_back(configRange);
    }
 
    return ranges;
}
 
void
PciUpDownBridge::recvRangeChange()
{
    AddrRangeList new_ranges = memSidePort.getAddrRanges();
 
    // Avoid potential loop of range change.
    if (new_ranges != memSideRanges) {
        DPRINTF(PciUpstream, "Received range change\n");
        for (const auto &r : new_ranges) {
            DPRINTF(PciUpstream, "-- %s\n", r.to_string());
        }
 
        memSideRanges = new_ranges;
        cpuSidePort.sendRangeChange();
    }
}
 
} // namespace gem5