* Authors: Ron Dreslinski
* Steve Reinhardt
* Ali Saidi
+ * Andreas Hansson
*/
/**
#include "base/cast.hh"
#include "base/compiler.hh"
-#include "base/fast_alloc.hh"
#include "base/flags.hh"
#include "base/misc.hh"
#include "base/printable.hh"
// @TODO these should be classified as responses rather than
// requests; coding them as requests initially for backwards
// compatibility
- NetworkNackError, // nacked at network layer (not by protocol)
InvalidDestError, // packet dest field invalid
BadAddressError, // memory address invalid
FunctionalReadError, // unable to fulfill functional read
* ultimate destination and back, possibly being conveyed by several
* different Packets along the way.)
*/
-class Packet : public FastAlloc, public Printable
+class Packet : public Printable
{
public:
typedef uint32_t FlagsType;
typedef ::Flags<FlagsType> Flags;
- typedef short NodeID;
private:
static const FlagsType PUBLIC_FLAGS = 0x00000000;
/// Are the 'addr' and 'size' fields valid?
static const FlagsType VALID_ADDR = 0x00000100;
static const FlagsType VALID_SIZE = 0x00000200;
- /// Is the 'src' field valid?
- static const FlagsType VALID_SRC = 0x00000400;
- static const FlagsType VALID_DST = 0x00000800;
/// Is the data pointer set to a value that shouldn't be freed
/// when the packet is destroyed?
static const FlagsType STATIC_DATA = 0x00001000;
* for example by using an appropriate sender state. The latter is
* done in the cache and bridge.
*/
- NodeID src;
+ PortID src;
/**
* Destination port identifier that is present on all response
* response, and the destination is used, e.g. by the bus, to
* select the appropriate path through the interconnect.
*/
- NodeID dest;
+ PortID dest;
/**
* The original value of the command field. Only valid when the
* Object used to maintain state of a PrintReq. The senderState
* field of a PrintReq should always be of this type.
*/
- class PrintReqState : public SenderState, public FastAlloc
+ class PrintReqState : public SenderState
{
private:
/**
// Network error conditions... encapsulate them as methods since
// their encoding keeps changing (from result field to command
// field, etc.)
- void
- setNacked()
- {
- assert(isResponse());
- cmd = MemCmd::NetworkNackError;
- }
-
void
setBadAddress()
{
cmd = MemCmd::BadAddressError;
}
- bool wasNacked() const { return cmd == MemCmd::NetworkNackError; }
bool hadBadAddress() const { return cmd == MemCmd::BadAddressError; }
void copyError(Packet *pkt) { assert(pkt->isError()); cmd = pkt->cmd; }
- bool isSrcValid() { return flags.isSet(VALID_SRC); }
+ bool isSrcValid() const { return src != InvalidPortID; }
/// Accessor function to get the source index of the packet.
- NodeID getSrc() const { assert(flags.isSet(VALID_SRC)); return src; }
+ PortID getSrc() const { assert(isSrcValid()); return src; }
/// Accessor function to set the source index of the packet.
- void setSrc(NodeID _src) { src = _src; flags.set(VALID_SRC); }
+ void setSrc(PortID _src) { src = _src; }
/// Reset source field, e.g. to retransmit packet on different bus.
- void clearSrc() { flags.clear(VALID_SRC); }
+ void clearSrc() { src = InvalidPortID; }
- bool isDestValid() { return flags.isSet(VALID_DST); }
+ bool isDestValid() const { return dest != InvalidPortID; }
/// Accessor function for the destination index of the packet.
- NodeID getDest() const { assert(flags.isSet(VALID_DST)); return dest; }
+ PortID getDest() const { assert(isDestValid()); return dest; }
/// Accessor function to set the destination index of the packet.
- void setDest(NodeID _dest) { dest = _dest; flags.set(VALID_DST); }
+ void setDest(PortID _dest) { dest = _dest; }
/// Reset destination field, e.g. to turn a response into a request again.
- void clearDest() { flags.clear(VALID_DST); }
+ void clearDest() { dest = InvalidPortID; }
Addr getAddr() const { assert(flags.isSet(VALID_ADDR)); return addr; }
+ /**
+ * Update the address of this packet mid-transaction. This is used
+ * by the address mapper to change an already set address to a new
+ * one based on the system configuration. It is intended to remap
+ * an existing address, so it asserts that the current address is
+ * valid.
+ */
+ void setAddr(Addr _addr) { assert(flags.isSet(VALID_ADDR)); addr = _addr; }
+
unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; }
Addr getOffset(int blkSize) const { return getAddr() & (Addr)(blkSize - 1); }
*/
Packet(Request *_req, MemCmd _cmd)
: cmd(_cmd), req(_req), data(NULL),
+ src(InvalidPortID), dest(InvalidPortID),
bytesValidStart(0), bytesValidEnd(0),
time(curTick()), senderState(NULL)
{
*/
Packet(Request *_req, MemCmd _cmd, int _blkSize)
: cmd(_cmd), req(_req), data(NULL),
+ src(InvalidPortID), dest(InvalidPortID),
bytesValidStart(0), bytesValidEnd(0),
time(curTick()), senderState(NULL)
{
if (!clearFlags)
flags.set(pkt->flags & COPY_FLAGS);
- flags.set(pkt->flags & (VALID_ADDR|VALID_SIZE|VALID_SRC|VALID_DST));
+ flags.set(pkt->flags & (VALID_ADDR|VALID_SIZE));
flags.set(pkt->flags & STATIC_DATA);
}
flags.clear(EXPRESS_SNOOP);
dest = src;
- flags.set(VALID_DST, flags.isSet(VALID_SRC));
- flags.clear(VALID_SRC);
+ clearSrc();
}
void
}
}
- /**
- * Take a request packet that has been returned as NACKED and
- * modify it so that it can be sent out again. Only packets that
- * need a response can be NACKED, so verify that that is true.
- */
- void
- reinitNacked()
- {
- assert(wasNacked());
- cmd = origCmd;
- assert(needsResponse());
- clearDest();
- }
-
void
setSize(unsigned size)
{
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