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mem: Add instruction sequence number to request

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This patch adds the instruction sequence number to the request and provides a
request constructor that accepts a sequence number for initialization.
This commit is contained in:
Radhika Jagtap 2015-12-07 16:42:15 -06:00
parent de4dc50e95
commit 36bb848104
1 changed files with 40 additions and 6 deletions
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46
src/mem/request.hh
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@ -58,6 +58,7 @@
#include "base/flags.hh"
#include "base/misc.hh"
#include "base/types.hh"
#include "cpu/inst_seq.hh"
#include "sim/core.hh"
/**
@ -204,6 +205,8 @@ class Request
VALID_PADDR = 0x00000002,
/** Whether or not the vaddr & asid are valid. */
VALID_VADDR = 0x00000004,
/** Whether or not the instruction sequence number is valid. */
VALID_INST_SEQ_NUM = 0x00000008,
/** Whether or not the pc is valid. */
VALID_PC = 0x00000010,
/** Whether or not the context ID is valid. */
@ -211,7 +214,6 @@ class Request
VALID_THREAD_ID = 0x00000040,
/** Whether or not the sc result is valid. */
VALID_EXTRA_DATA = 0x00000080,
/**
* These flags are *not* cleared when a Request object is reused
* (assigned a new address).
@ -297,6 +299,9 @@ class Request
/** program counter of initiating access; for tracing/debugging */
Addr _pc;
/** Sequence number of the instruction that creates the request */
const InstSeqNum _reqInstSeqNum;
public:
/**
@ -308,9 +313,21 @@ class Request
: _paddr(0), _size(0), _masterId(invldMasterId), _time(0),
_taskId(ContextSwitchTaskId::Unknown), _asid(0), _vaddr(0),
_extraData(0), _contextId(0), _threadId(0), _pc(0),
translateDelta(0), accessDelta(0), depth(0)
_reqInstSeqNum(0), translateDelta(0), accessDelta(0), depth(0)
{}
Request(Addr paddr, unsigned size, Flags flags, MasterID mid,
InstSeqNum seq_num, ContextID cid, ThreadID tid)
: _paddr(0), _size(0), _masterId(invldMasterId), _time(0),
_taskId(ContextSwitchTaskId::Unknown), _asid(0), _vaddr(0),
_extraData(0), _contextId(0), _threadId(0), _pc(0),
_reqInstSeqNum(seq_num), translateDelta(0), accessDelta(0), depth(0)
{
setPhys(paddr, size, flags, mid, curTick());
setThreadContext(cid, tid);
privateFlags.set(VALID_INST_SEQ_NUM);
}
/**
* Constructor for physical (e.g. device) requests. Initializes
* just physical address, size, flags, and timestamp (to curTick()).
@ -320,7 +337,7 @@ class Request
: _paddr(0), _size(0), _masterId(invldMasterId), _time(0),
_taskId(ContextSwitchTaskId::Unknown), _asid(0), _vaddr(0),
_extraData(0), _contextId(0), _threadId(0), _pc(0),
translateDelta(0), accessDelta(0), depth(0)
_reqInstSeqNum(0), translateDelta(0), accessDelta(0), depth(0)
{
setPhys(paddr, size, flags, mid, curTick());
}
@ -329,7 +346,7 @@ class Request
: _paddr(0), _size(0), _masterId(invldMasterId), _time(0),
_taskId(ContextSwitchTaskId::Unknown), _asid(0), _vaddr(0),
_extraData(0), _contextId(0), _threadId(0), _pc(0),
translateDelta(0), accessDelta(0), depth(0)
_reqInstSeqNum(0), translateDelta(0), accessDelta(0), depth(0)
{
setPhys(paddr, size, flags, mid, time);
}
@ -339,7 +356,7 @@ class Request
: _paddr(0), _size(0), _masterId(invldMasterId), _time(0),
_taskId(ContextSwitchTaskId::Unknown), _asid(0), _vaddr(0),
_extraData(0), _contextId(0), _threadId(0), _pc(0),
translateDelta(0), accessDelta(0), depth(0)
_reqInstSeqNum(0), translateDelta(0), accessDelta(0), depth(0)
{
setPhys(paddr, size, flags, mid, time);
privateFlags.set(VALID_PC);
@ -351,7 +368,7 @@ class Request
: _paddr(0), _size(0), _masterId(invldMasterId), _time(0),
_taskId(ContextSwitchTaskId::Unknown), _asid(0), _vaddr(0),
_extraData(0), _contextId(0), _threadId(0), _pc(0),
translateDelta(0), accessDelta(0), depth(0)
_reqInstSeqNum(0), translateDelta(0), accessDelta(0), depth(0)
{
setVirt(asid, vaddr, size, flags, mid, pc);
setThreadContext(cid, tid);
@ -641,6 +658,23 @@ class Request
void setAccessLatency() { accessDelta = curTick() - _time - translateDelta; }
Tick getAccessLatency() const { return accessDelta; }
/**
* Accessor for the sequence number of instruction that creates the
* request.
*/
bool
hasInstSeqNum() const
{
return privateFlags.isSet(VALID_INST_SEQ_NUM);
}
InstSeqNum
getReqInstSeqNum() const
{
assert(privateFlags.isSet(VALID_INST_SEQ_NUM));
return _reqInstSeqNum;
}
/** Accessor functions for flags. Note that these are for testing
only; setting flags should be done via setFlags(). */
bool isUncacheable() const { return _flags.isSet(UNCACHEABLE); }