// Called from the processor on a memory write (can be any size with write-through/around)
// Just queues the request.
bool CDMA::Cache::Write(MCID id, MemAddr address, const MemData& data, WClientID wid)
{
assert(address % m_lineSize == 0);
// We need to arbitrate between the different processes on the cache,
// and then between the different clients. There are 2 arbitrators for this.
if (!p_bus.Invoke())
{
// Arbitration failed
DeadlockWrite("Unable to acquire bus for write");
return false;
}
Request req;
req.address = address;
req.write = true;
req.client = id;
req.wid = wid;
COMMIT{
std::copy(data.data, data.data + m_lineSize, req.mdata.data);
std::copy(data.mask, data.mask + m_lineSize, req.mdata.mask);
}
// Client should have been registered
assert(m_clients[req.client] != NULL);
if (!m_requests.Push(req))
{
// Buffer was full
DeadlockWrite("Unable to push write request into buffer");
return false;
}
// Snoop the write back to the other clients
for (size_t i = 0; i < m_clients.size(); ++i)
{
IMemoryCallback* client = m_clients[i];
if (client != NULL && i != req.client)
{
if (!client->OnMemorySnooped(req.address, req.mdata.data, req.mdata.mask))
{
DeadlockWrite("Unable to snoop data to cache clients");
return false;
}
}
}
return true;
}
// Called from the processor on a memory write (can be any size with write-through/around)
// Just queues the request.
bool ZLCDMA::Cache::Write(MCID id, MemAddr address, const MemData& data, WClientID wid)
{
// This method can get called by several 'listeners', so we need
// to arbitrate and store the request in a buffer to handle it.
if (!p_bus.Invoke())
{
// Arbitration failed
DeadlockWrite("Unable to acquire bus for write");
return false;
}
Request req;
req.address = address;
req.write = true;
req.client = id;
req.wid = wid;
COMMIT{
std::copy(data.data, data.data + m_lineSize, req.mdata.data);
std::copy(data.mask, data.mask + m_lineSize, req.mdata.mask);
}
// Client should have been registered
assert(m_clients[req.client] != NULL);
if (!m_requests.Push(req))
{
// Buffer was full
DeadlockWrite("Unable to push write request into buffer");
return false;
}
// Snoop the write back to the other clients
for (size_t i = 0; i < m_clients.size(); ++i)
{
IMemoryCallback* client = m_clients[i];
if (client != NULL && i != req.client)
{
if (!client->OnMemorySnooped(req.address, req.mdata.data, req.mdata.mask))
{
DeadlockWrite("Unable to snoop data to cache clients");
return false;
}
}
}
return true;
}
