/*
- * Copyright (c) 2012-2018 ARM Limited
+ * Copyright (c) 2012-2019 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
#include <cassert>
#include <list>
+#include "base/addr_range.hh"
#include "base/cast.hh"
#include "base/compiler.hh"
#include "base/flags.hh"
#include "base/logging.hh"
#include "base/printable.hh"
#include "base/types.hh"
+#include "config/the_isa.hh"
#include "mem/request.hh"
#include "sim/core.hh"
WriteClean, // writes dirty data below without evicting
CleanEvict,
SoftPFReq,
+ SoftPFExReq,
HardPFReq,
SoftPFResp,
HardPFResp,
// Flags to transfer across when copying a packet
COPY_FLAGS = 0x0000003F,
+ // Flags that are used to create reponse packets
+ RESPONDER_FLAGS = 0x00000009,
+
// Does this packet have sharers (which means it should not be
// considered writable) or not. See setHasSharers below.
HAS_SHARERS = 0x00000001,
*/
std::vector<bool> bytesValid;
+ // Quality of Service priority value
+ uint8_t _qosValue;
+
public:
/**
/**
* A virtual base opaque structure used to hold state associated
- * with the packet (e.g., an MSHR), specific to a MemObject that
+ * with the packet (e.g., an MSHR), specific to a SimObject that
* sees the packet. A pointer to this state is returned in the
- * packet's response so that the MemObject in question can quickly
+ * packet's response so that the SimObject in question can quickly
* look up the state needed to process it. A specific subclass
* would be derived from this to carry state specific to a
* particular sending device.
*
- * As multiple MemObjects may add their SenderState throughout the
+ * As multiple SimObjects may add their SenderState throughout the
* memory system, the SenderStates create a stack, where a
- * MemObject can add a new Senderstate, as long as the
+ * SimObject can add a new Senderstate, as long as the
* predecessing SenderState is restored when the response comes
* back. For this reason, the predecessor should always be
* populated with the current SenderState of a packet before
bool isPrint() const { return cmd.isPrint(); }
bool isFlush() const { return cmd.isFlush(); }
+ bool isWholeLineWrite(unsigned blk_size)
+ {
+ return (cmd == MemCmd::WriteReq || cmd == MemCmd::WriteLineReq) &&
+ getOffset(blk_size) == 0 && getSize() == blk_size;
+ }
+
//@{
/// Snoop flags
/**
bool responderHadWritable() const
{ return flags.isSet(RESPONDER_HAD_WRITABLE); }
+ /**
+ * Copy the reponse flags from an input packet to this packet. The
+ * reponse flags determine whether a responder has been found and
+ * the state at which the block will be at the destination.
+ *
+ * @pkt The packet that we will copy flags from
+ */
+ void copyResponderFlags(const PacketPtr pkt);
+
/**
* A writeback/writeclean cmd gets propagated further downstream
* by the receiver when the flag is set.
bool isBlockCached() const { return flags.isSet(BLOCK_CACHED); }
void clearBlockCached() { flags.clear(BLOCK_CACHED); }
+ /**
+ * QoS Value getter
+ * Returns 0 if QoS value was never set (constructor default).
+ *
+ * @return QoS priority value of the packet
+ */
+ inline uint8_t qosValue() const { return _qosValue; }
+
+ /**
+ * QoS Value setter
+ * Interface for setting QoS priority value of the packet.
+ *
+ * @param qos_value QoS priority value
+ */
+ inline void qosValue(const uint8_t qos_value)
+ { _qosValue = qos_value; }
+
+ inline MasterID masterId() const { return req->masterId(); }
+
// Network error conditions... encapsulate them as methods since
// their encoding keeps changing (from result field to command
// field, etc.)
unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; }
+ /**
+ * Get address range to which this packet belongs.
+ *
+ * @return Address range of this packet.
+ */
+ AddrRange getAddrRange() const;
+
Addr getOffset(unsigned int blk_size) const
{
return getAddr() & Addr(blk_size - 1);
* not be valid. The command must be supplied.
*/
Packet(const RequestPtr &_req, MemCmd _cmd)
- : cmd(_cmd), id((PacketId)_req.get()), req(_req), data(nullptr),
- addr(0), _isSecure(false), size(0), headerDelay(0), snoopDelay(0),
+ : cmd(_cmd), id((PacketId)_req.get()), req(_req),
+ data(nullptr), addr(0), _isSecure(false), size(0),
+ _qosValue(0), headerDelay(0), snoopDelay(0),
payloadDelay(0), senderState(NULL)
{
if (req->hasPaddr()) {
*/
Packet(const RequestPtr &_req, MemCmd _cmd, int _blkSize, PacketId _id = 0)
: cmd(_cmd), id(_id ? _id : (PacketId)_req.get()), req(_req),
- data(nullptr), addr(0), _isSecure(false), headerDelay(0),
+ data(nullptr), addr(0), _isSecure(false),
+ _qosValue(0), headerDelay(0),
snoopDelay(0), payloadDelay(0), senderState(NULL)
{
if (req->hasPaddr()) {
data(nullptr),
addr(pkt->addr), _isSecure(pkt->_isSecure), size(pkt->size),
bytesValid(pkt->bytesValid),
+ _qosValue(pkt->qosValue()),
headerDelay(pkt->headerDelay),
snoopDelay(0),
payloadDelay(pkt->payloadDelay),
{
if (req->isLLSC())
return MemCmd::LoadLockedReq;
+ else if (req->isPrefetchEx())
+ return MemCmd::SoftPFExReq;
else if (req->isPrefetch())
return MemCmd::SoftPFReq;
else
flags.set(VALID_SIZE);
}
+ /**
+ * Check if packet corresponds to a given block-aligned address and
+ * address space.
+ *
+ * @param addr The address to compare against.
+ * @param is_secure Whether addr belongs to the secure address space.
+ * @param blk_size Block size in bytes.
+ * @return Whether packet matches description.
+ */
+ bool matchBlockAddr(const Addr addr, const bool is_secure,
+ const int blk_size) const;
+
+ /**
+ * Check if this packet refers to the same block-aligned address and
+ * address space as another packet.
+ *
+ * @param pkt The packet to compare against.
+ * @param blk_size Block size in bytes.
+ * @return Whether packet matches description.
+ */
+ bool matchBlockAddr(const PacketPtr pkt, const int blk_size) const;
+
+ /**
+ * Check if packet corresponds to a given address and address space.
+ *
+ * @param addr The address to compare against.
+ * @param is_secure Whether addr belongs to the secure address space.
+ * @return Whether packet matches description.
+ */
+ bool matchAddr(const Addr addr, const bool is_secure) const;
+
+ /**
+ * Check if this packet refers to the same address and address space as
+ * another packet.
+ *
+ * @param pkt The packet to compare against.
+ * @return Whether packet matches description.
+ */
+ bool matchAddr(const PacketPtr pkt) const;
public:
/**
getPtr()
{
assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA));
+ assert(!isMaskedWrite());
return (T*)data;
}
template <typename T>
T get(ByteOrder endian) const;
+#if THE_ISA != NULL_ISA
/**
* Get the data in the packet byte swapped from guest to host
* endian.
*/
template <typename T>
- T get() const;
+ T get() const
+ M5_DEPRECATED_MSG("The memory system should be ISA independent.");
+#endif
/** Set the value in the data pointer to v as big endian. */
template <typename T>
template <typename T>
void set(T v, ByteOrder endian);
+#if THE_ISA != NULL_ISA
/** Set the value in the data pointer to v as guest endian. */
template <typename T>
- void set(T v);
-
+ void set(T v)
+ M5_DEPRECATED_MSG("The memory system should be ISA independent.");
+#endif
/**
* Get the data in the packet byte swapped from the specified
// same pointer from source to destination and back
assert(p != getPtr<uint8_t>() || flags.isSet(STATIC_DATA));
- if (p != getPtr<uint8_t>())
+ if (p != getPtr<uint8_t>()) {
// for packet with allocated dynamic data, we copy data from
// one to the other, e.g. a forwarded response to a response
std::memcpy(getPtr<uint8_t>(), p, getSize());
+ }
}
/**
void
writeData(uint8_t *p) const
{
- std::memcpy(p, getConstPtr<uint8_t>(), getSize());
+ if (!isMaskedWrite()) {
+ std::memcpy(p, getConstPtr<uint8_t>(), getSize());
+ } else {
+ assert(req->getByteEnable().size() == getSize());
+ // Write only the enabled bytes
+ const uint8_t *base = getConstPtr<uint8_t>();
+ for (int i = 0; i < getSize(); i++) {
+ if (req->getByteEnable()[i]) {
+ p[i] = *(base + i);
+ }
+ // Disabled bytes stay untouched
+ }
+ }
}
/**
/** @} */
- private: // Private data accessor methods
/** Get the data in the packet without byte swapping. */
template <typename T>
T getRaw() const;
bool
trySatisfyFunctional(PacketPtr other)
{
+ if (other->isMaskedWrite()) {
+ // Do not forward data if overlapping with a masked write
+ if (_isSecure == other->isSecure() &&
+ getAddr() <= (other->getAddr() + other->getSize() - 1) &&
+ other->getAddr() <= (getAddr() + getSize() - 1)) {
+ warn("Trying to check against a masked write, skipping."
+ " (addr: 0x%x, other addr: 0x%x)", getAddr(),
+ other->getAddr());
+ }
+ return false;
+ }
// all packets that are carrying a payload should have a valid
// data pointer
return trySatisfyFunctional(other, other->getAddr(), other->isSecure(),
return cmd == MemCmd::CleanEvict || cmd == MemCmd::WritebackClean;
}
+ bool
+ isMaskedWrite() const
+ {
+ return (cmd == MemCmd::WriteReq && !req->getByteEnable().empty());
+ }
+
/**
* Check a functional request against a memory value represented
* by a base/size pair and an associated data array. If the
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