* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Ali Saidi
+ * Steve Reinhardt
*/
/**
* Definition of the Packet Class, a packet is a transaction occuring
* between a single level of the memory heirarchy (ie L1->L2).
*/
+
+#include <iostream>
+#include <cstring>
#include "base/misc.hh"
+#include "base/trace.hh"
#include "mem/packet.hh"
-static const std::string ReadReqString("ReadReq");
-static const std::string WriteReqString("WriteReq");
-static const std::string WriteReqNoAckString("WriteReqNoAck");
-static const std::string ReadRespString("ReadResp");
-static const std::string WriteRespString("WriteResp");
-static const std::string OtherCmdString("<other>");
+// The one downside to bitsets is that static initializers can get ugly.
+#define SET1(a1) (1 << (a1))
+#define SET2(a1, a2) (SET1(a1) | SET1(a2))
+#define SET3(a1, a2, a3) (SET2(a1, a2) | SET1(a3))
+#define SET4(a1, a2, a3, a4) (SET3(a1, a2, a3) | SET1(a4))
+#define SET5(a1, a2, a3, a4, a5) (SET4(a1, a2, a3, a4) | SET1(a5))
+#define SET6(a1, a2, a3, a4, a5, a6) (SET5(a1, a2, a3, a4, a5) | SET1(a6))
-const std::string &
-Packet::cmdString() const
+const MemCmd::CommandInfo
+MemCmd::commandInfo[] =
{
- switch (cmd) {
- case ReadReq: return ReadReqString;
- case WriteReq: return WriteReqString;
- case WriteReqNoAck: return WriteReqNoAckString;
- case ReadResp: return ReadRespString;
- case WriteResp: return WriteRespString;
- default: return OtherCmdString;
- }
-}
+ /* InvalidCmd */
+ { 0, InvalidCmd, "InvalidCmd" },
+ /* ReadReq */
+ { SET3(IsRead, IsRequest, NeedsResponse), ReadResp, "ReadReq" },
+ /* ReadResp */
+ { SET3(IsRead, IsResponse, HasData), InvalidCmd, "ReadResp" },
+ /* WriteReq */
+ { SET5(IsWrite, NeedsExclusive, IsRequest, NeedsResponse, HasData),
+ WriteResp, "WriteReq" },
+ /* WriteResp */
+ { SET3(IsWrite, NeedsExclusive, IsResponse), InvalidCmd, "WriteResp" },
+ /* Writeback */
+ { SET4(IsWrite, NeedsExclusive, IsRequest, HasData),
+ InvalidCmd, "Writeback" },
+ /* SoftPFReq */
+ { SET4(IsRead, IsRequest, IsSWPrefetch, NeedsResponse),
+ SoftPFResp, "SoftPFReq" },
+ /* HardPFReq */
+ { SET4(IsRead, IsRequest, IsHWPrefetch, NeedsResponse),
+ HardPFResp, "HardPFReq" },
+ /* SoftPFResp */
+ { SET4(IsRead, IsResponse, IsSWPrefetch, HasData),
+ InvalidCmd, "SoftPFResp" },
+ /* HardPFResp */
+ { SET4(IsRead, IsResponse, IsHWPrefetch, HasData),
+ InvalidCmd, "HardPFResp" },
+ /* WriteInvalidateReq */
+ { SET6(IsWrite, NeedsExclusive, IsInvalidate,
+ IsRequest, HasData, NeedsResponse),
+ WriteInvalidateResp, "WriteInvalidateReq" },
+ /* WriteInvalidateResp */
+ { SET4(IsWrite, NeedsExclusive, IsInvalidate, IsResponse),
+ InvalidCmd, "WriteInvalidateResp" },
+ /* UpgradeReq */
+ { SET4(IsInvalidate, NeedsExclusive, IsRequest, NeedsResponse),
+ UpgradeResp, "UpgradeReq" },
+ /* UpgradeResp */
+ { SET3(IsInvalidate, NeedsExclusive, IsResponse),
+ InvalidCmd, "UpgradeResp" },
+ /* ReadExReq */
+ { SET5(IsRead, NeedsExclusive, IsInvalidate, IsRequest, NeedsResponse),
+ ReadExResp, "ReadExReq" },
+ /* ReadExResp */
+ { SET5(IsRead, NeedsExclusive, IsInvalidate, IsResponse, HasData),
+ InvalidCmd, "ReadExResp" },
+ /* LoadLockedReq */
+ { SET4(IsRead, IsLocked, IsRequest, NeedsResponse),
+ LoadLockedResp, "LoadLockedReq" },
+ /* LoadLockedResp */
+ { SET4(IsRead, IsLocked, IsResponse, HasData),
+ InvalidCmd, "LoadLockedResp" },
+ /* StoreCondReq */
+ { SET6(IsWrite, NeedsExclusive, IsLocked,
+ IsRequest, NeedsResponse, HasData),
+ StoreCondResp, "StoreCondReq" },
+ /* StoreCondResp */
+ { SET4(IsWrite, NeedsExclusive, IsLocked, IsResponse),
+ InvalidCmd, "StoreCondResp" },
+ /* SwapReq -- for Swap ldstub type operations */
+ { SET6(IsRead, IsWrite, NeedsExclusive, IsRequest, HasData, NeedsResponse),
+ SwapResp, "SwapReq" },
+ /* SwapResp -- for Swap ldstub type operations */
+ { SET5(IsRead, IsWrite, NeedsExclusive, IsResponse, HasData),
+ InvalidCmd, "SwapResp" },
+ /* NetworkNackError -- nacked at network layer (not by protocol) */
+ { SET2(IsRequest, IsError), InvalidCmd, "NetworkNackError" },
+ /* InvalidDestError -- packet dest field invalid */
+ { SET2(IsRequest, IsError), InvalidCmd, "InvalidDestError" },
+ /* BadAddressError -- memory address invalid */
+ { SET2(IsRequest, IsError), InvalidCmd, "BadAddressError" }
+};
+
/** delete the data pointed to in the data pointer. Ok to call to matter how
* data was allocted. */
/** Do the packet modify the same addresses. */
bool
-Packet::intersect(Packet *p)
+Packet::intersect(PacketPtr p)
{
Addr s1 = getAddr();
- Addr e1 = getAddr() + getSize();
+ Addr e1 = getAddr() + getSize() - 1;
Addr s2 = p->getAddr();
- Addr e2 = p->getAddr() + p->getSize();
+ Addr e2 = p->getAddr() + p->getSize() - 1;
- if (s1 >= s2 && s1 < e2)
- return true;
- if (e1 >= s2 && e1 < e2)
- return true;
- return false;
+ return !(s1 > e2 || e1 < s2);
}
+
bool
-fixPacket(Packet *func, Packet *timing)
+Packet::checkFunctional(Addr addr, int size, uint8_t *data)
+{
+ Addr func_start = getAddr();
+ Addr func_end = getAddr() + getSize() - 1;
+ Addr val_start = addr;
+ Addr val_end = val_start + size - 1;
+
+ if (func_start > val_end || val_start > func_end) {
+ // no intersection
+ return false;
+ }
+
+ // offset of functional request into supplied value (could be
+ // negative if partial overlap)
+ int offset = func_start - val_start;
+
+ if (isRead()) {
+ if (func_start >= val_start && func_end <= val_end) {
+ allocate();
+ std::memcpy(getPtr<uint8_t>(), data + offset, getSize());
+ makeResponse();
+ return true;
+ } else {
+ // In this case the timing packet only partially satisfies
+ // the request, so we would need more information to make
+ // this work. Like bytes valid in the packet or
+ // something, so the request could continue and get this
+ // bit of possibly newer data along with the older data
+ // not written to yet.
+ panic("Memory value only partially satisfies the functional "
+ "request. Now what?");
+ }
+ } else if (isWrite()) {
+ if (offset >= 0) {
+ std::memcpy(data + offset, getPtr<uint8_t>(),
+ (std::min(func_end, val_end) - func_start) + 1);
+ } else { // val_start > func_start
+ std::memcpy(data, getPtr<uint8_t>() - offset,
+ (std::min(func_end, val_end) - val_start) + 1);
+ }
+ // we always want to keep going with a write
+ return false;
+ } else
+ panic("Don't know how to handle command %s\n", cmdString());
+}
+
+
+std::ostream &
+operator<<(std::ostream &o, const Packet &p)
{
- panic("Need to implement!");
+
+ o << "[0x";
+ o.setf(std::ios_base::hex, std::ios_base::showbase);
+ o << p.getAddr();
+ o.unsetf(std::ios_base::hex| std::ios_base::showbase);
+ o << ":";
+ o.setf(std::ios_base::hex, std::ios_base::showbase);
+ o << p.getAddr() + p.getSize() - 1 << "] ";
+ o.unsetf(std::ios_base::hex| std::ios_base::showbase);
+
+ if (p.isRead())
+ o << "Read ";
+ if (p.isWrite())
+ o << "Write ";
+ if (p.isInvalidate())
+ o << "Invalidate ";
+ if (p.isRequest())
+ o << "Request ";
+ if (p.isResponse())
+ o << "Response ";
+ if (p.hasData())
+ o << "w/Data ";
+
+ o << std::endl;
+ return o;
}
+