#define __MEM_REQUEST_HH__
#include <cassert>
+#include <climits>
-#include "base/fast_alloc.hh"
#include "base/flags.hh"
#include "base/misc.hh"
-#include "sim/host.hh"
+#include "base/types.hh"
#include "sim/core.hh"
class Request;
typedef Request* RequestPtr;
+typedef uint16_t MasterID;
-class Request : public FastAlloc
+class Request
{
- friend class Packet;
-
public:
typedef uint32_t FlagsType;
typedef ::Flags<FlagsType> Flags;
/** ASI information for this request if it exists. */
static const FlagsType ASI_BITS = 0x000000FF;
- /** The request is a Load locked/store conditional. */
- static const FlagsType LOCKED = 0x00000100;
+ /** The request was an instruction fetch. */
+ static const FlagsType INST_FETCH = 0x00000100;
/** The virtual address is also the physical address. */
static const FlagsType PHYSICAL = 0x00000200;
/** The request is an ALPHA VPTE pal access (hw_ld). */
static const FlagsType ALTMODE = 0x00000800;
/** The request is to an uncacheable address. */
static const FlagsType UNCACHEABLE = 0x00001000;
- /** The request should not cause a page fault. */
- static const FlagsType NO_FAULT = 0x00002000;
+ /** This request is to a memory mapped register. */
+ static const FlagsType MMAPPED_IPR = 0x00002000;
+ /** This request is a clear exclusive. */
+ static const FlagsType CLEAR_LL = 0x00004000;
+
/** The request should not cause a memory access. */
- static const FlagsType NO_ACCESS = 0x00004000;
+ static const FlagsType NO_ACCESS = 0x00080000;
+ /** This request will lock or unlock the accessed memory. When used with
+ * a load, the access locks the particular chunk of memory. When used
+ * with a store, it unlocks. The rule is that locked accesses have to be
+ * made up of a locked load, some operation on the data, and then a locked
+ * store.
+ */
+ static const FlagsType LOCKED = 0x00100000;
+ /** The request is a Load locked/store conditional. */
+ static const FlagsType LLSC = 0x00200000;
+ /** This request is for a memory swap. */
+ static const FlagsType MEM_SWAP = 0x00400000;
+ static const FlagsType MEM_SWAP_COND = 0x00800000;
+
+ /** The request is a prefetch. */
+ static const FlagsType PREFETCH = 0x01000000;
/** The request should be prefetched into the exclusive state. */
- static const FlagsType PF_EXCLUSIVE = 0x00010000;
+ static const FlagsType PF_EXCLUSIVE = 0x02000000;
/** The request should be marked as LRU. */
- static const FlagsType EVICT_NEXT = 0x00020000;
- /** The request should ignore unaligned access faults */
- static const FlagsType NO_ALIGN_FAULT = 0x00040000;
- /** The request was an instruction read. */
- static const FlagsType INST_READ = 0x00080000;
- /** This request is for a memory swap. */
- static const FlagsType MEM_SWAP = 0x00100000;
- static const FlagsType MEM_SWAP_COND = 0x00200000;
- /** The request should ignore unaligned access faults */
- static const FlagsType NO_HALF_WORD_ALIGN_FAULT = 0x00400000;
- /** This request is to a memory mapped register. */
- static const FlagsType MMAPED_IPR = 0x00800000;
+ static const FlagsType EVICT_NEXT = 0x04000000;
+
+ /** These flags are *not* cleared when a Request object is reused
+ (assigned a new address). */
+ static const FlagsType STICKY_FLAGS = INST_FETCH;
+
+ /** Request Ids that are statically allocated
+ * @{*/
+ /** This request id is used for writeback requests by the caches */
+ static const MasterID wbMasterId = 0;
+ /** This request id is used for functional requests that don't come from a
+ * particular device
+ */
+ static const MasterID funcMasterId = 1;
+ /** This request id is used for message signaled interrupts */
+ static const MasterID intMasterId = 2;
+ /** Invalid request id for assertion checking only. It is invalid behavior
+ * to ever send this id as part of a request.
+ * @todo C++1x replace with numeric_limits when constexpr is added */
+ static const MasterID invldMasterId = USHRT_MAX;
+ /** @} */
private:
- static const FlagsType PUBLIC_FLAGS = 0x00FF3FFF;
- static const FlagsType PRIVATE_FLAGS = 0xFF000000;
+ typedef uint8_t PrivateFlagsType;
+ typedef ::Flags<PrivateFlagsType> PrivateFlags;
/** Whether or not the size is valid. */
- static const FlagsType VALID_SIZE = 0x01000000;
+ static const PrivateFlagsType VALID_SIZE = 0x00000001;
/** Whether or not paddr is valid (has been written yet). */
- static const FlagsType VALID_PADDR = 0x02000000;
+ static const PrivateFlagsType VALID_PADDR = 0x00000002;
/** Whether or not the vaddr & asid are valid. */
- static const FlagsType VALID_VADDR = 0x04000000;
+ static const PrivateFlagsType VALID_VADDR = 0x00000004;
/** Whether or not the pc is valid. */
- static const FlagsType VALID_PC = 0x10000000;
+ static const PrivateFlagsType VALID_PC = 0x00000010;
/** Whether or not the context ID is valid. */
- static const FlagsType VALID_CONTEXT_ID = 0x20000000;
- static const FlagsType VALID_THREAD_ID = 0x40000000;
+ static const PrivateFlagsType VALID_CONTEXT_ID = 0x00000020;
+ static const PrivateFlagsType VALID_THREAD_ID = 0x00000040;
/** Whether or not the sc result is valid. */
- static const FlagsType VALID_EXTRA_DATA = 0x80000000;
+ static const PrivateFlagsType VALID_EXTRA_DATA = 0x00000080;
+
+ /** These flags are *not* cleared when a Request object is reused
+ (assigned a new address). */
+ static const PrivateFlagsType STICKY_PRIVATE_FLAGS =
+ VALID_CONTEXT_ID | VALID_THREAD_ID;
private:
/**
* The physical address of the request. Valid only if validPaddr
* is set.
*/
- Addr paddr;
+ Addr _paddr;
/**
* The size of the request. This field must be set when vaddr or
* paddr is written via setVirt() or setPhys(), so it is always
* valid as long as one of the address fields is valid.
*/
- int size;
+ int _size;
+
+ /** The requestor ID which is unique in the system for all ports
+ * that are capable of issuing a transaction
+ */
+ MasterID _masterId;
/** Flag structure for the request. */
- Flags flags;
+ Flags _flags;
+
+ /** Private flags for field validity checking. */
+ PrivateFlags privateFlags;
/**
* The time this request was started. Used to calculate
- * latencies. This field is set to curTick any time paddr or vaddr
+ * latencies. This field is set to curTick() any time paddr or vaddr
* is written.
*/
- Tick time;
+ Tick _time;
/** The address space ID. */
- int asid;
+ int _asid;
/** The virtual address of the request. */
- Addr vaddr;
+ Addr _vaddr;
/**
* Extra data for the request, such as the return value of
* store conditional or the compare value for a CAS. */
- uint64_t extraData;
+ uint64_t _extraData;
/** The context ID (for statistics, typically). */
int _contextId;
int _threadId;
/** program counter of initiating access; for tracing/debugging */
- Addr pc;
+ Addr _pc;
public:
- /** Minimal constructor. No fields are initialized. */
+ /** Minimal constructor. No fields are initialized.
+ * (Note that _flags and privateFlags are cleared by Flags
+ * default constructor.)
+ */
Request()
{}
/**
* Constructor for physical (e.g. device) requests. Initializes
- * just physical address, size, flags, and timestamp (to curTick).
+ * just physical address, size, flags, and timestamp (to curTick()).
* These fields are adequate to perform a request.
*/
- Request(Addr paddr, int size, Flags flags)
+ Request(Addr paddr, int size, Flags flags, MasterID mid)
+ {
+ setPhys(paddr, size, flags, mid);
+ }
+
+ Request(Addr paddr, int size, Flags flags, MasterID mid, Tick time)
+ {
+ setPhys(paddr, size, flags, mid, time);
+ }
+
+ Request(Addr paddr, int size, Flags flags, MasterID mid, Tick time, Addr pc)
{
- setPhys(paddr, size, flags);
+ setPhys(paddr, size, flags, mid, time);
+ privateFlags.set(VALID_PC);
+ _pc = pc;
}
- Request(int asid, Addr vaddr, int size, Flags flags, Addr pc,
- int cid, int tid)
+ Request(int asid, Addr vaddr, int size, Flags flags, MasterID mid, Addr pc,
+ int cid, ThreadID tid)
{
+ setVirt(asid, vaddr, size, flags, mid, pc);
setThreadContext(cid, tid);
- setVirt(asid, vaddr, size, flags, pc);
}
- ~Request() {} // for FastAlloc
+ ~Request() {}
/**
* Set up CPU and thread numbers.
*/
void
- setThreadContext(int context_id, int thread_id)
+ setThreadContext(int context_id, ThreadID tid)
{
_contextId = context_id;
- _threadId = thread_id;
- flags.set(VALID_CONTEXT_ID|VALID_THREAD_ID);
+ _threadId = tid;
+ privateFlags.set(VALID_CONTEXT_ID|VALID_THREAD_ID);
}
/**
* allocated Request object.
*/
void
- setPhys(Addr _paddr, int _size, Flags _flags)
+ setPhys(Addr paddr, int size, Flags flags, MasterID mid, Tick time)
+ {
+ assert(size >= 0);
+ _paddr = paddr;
+ _size = size;
+ _time = time;
+ _masterId = mid;
+ _flags.clear(~STICKY_FLAGS);
+ _flags.set(flags);
+ privateFlags.clear(~STICKY_PRIVATE_FLAGS);
+ privateFlags.set(VALID_PADDR|VALID_SIZE);
+ }
+
+ void
+ setPhys(Addr paddr, int size, Flags flags, MasterID mid)
{
- assert(_size >= 0);
- paddr = _paddr;
- size = _size;
- time = curTick;
-
- flags.set(VALID_PADDR|VALID_SIZE);
- flags.clear(VALID_VADDR|VALID_PC|VALID_EXTRA_DATA|MMAPED_IPR);
- flags.update(_flags, PUBLIC_FLAGS);
+ setPhys(paddr, size, flags, mid, curTick());
}
/**
* allocated Request object.
*/
void
- setVirt(int _asid, Addr _vaddr, int _size, Flags _flags, Addr _pc)
+ setVirt(int asid, Addr vaddr, int size, Flags flags, MasterID mid, Addr pc)
{
- assert(_size >= 0);
- asid = _asid;
- vaddr = _vaddr;
- size = _size;
- pc = _pc;
- time = curTick;
-
- flags.set(VALID_VADDR|VALID_SIZE|VALID_PC);
- flags.clear(VALID_PADDR|VALID_EXTRA_DATA|MMAPED_IPR);
- flags.update(_flags, PUBLIC_FLAGS);
+ assert(size >= 0);
+ _asid = asid;
+ _vaddr = vaddr;
+ _size = size;
+ _masterId = mid;
+ _pc = pc;
+ _time = curTick();
+
+ _flags.clear(~STICKY_FLAGS);
+ _flags.set(flags);
+ privateFlags.clear(~STICKY_PRIVATE_FLAGS);
+ privateFlags.set(VALID_VADDR|VALID_SIZE|VALID_PC);
}
/**
* to guarantee that the size and flags are also set.
*/
void
- setPaddr(Addr _paddr)
+ setPaddr(Addr paddr)
{
- assert(flags.isSet(VALID_VADDR));
- paddr = _paddr;
- flags.set(VALID_PADDR);
+ assert(privateFlags.isSet(VALID_VADDR));
+ _paddr = paddr;
+ privateFlags.set(VALID_PADDR);
}
/**
*/
void splitOnVaddr(Addr split_addr, RequestPtr &req1, RequestPtr &req2)
{
- assert(flags.isSet(VALID_VADDR));
- assert(flags.noneSet(VALID_PADDR));
- assert(split_addr > vaddr && split_addr < vaddr + size);
+ assert(privateFlags.isSet(VALID_VADDR));
+ assert(privateFlags.noneSet(VALID_PADDR));
+ assert(split_addr > _vaddr && split_addr < _vaddr + _size);
req1 = new Request;
*req1 = *this;
req2 = new Request;
*req2 = *this;
- req1->size = split_addr - vaddr;
- req2->vaddr = split_addr;
- req2->size = size - req1->size;
+ req1->_size = split_addr - _vaddr;
+ req2->_vaddr = split_addr;
+ req2->_size = _size - req1->_size;
}
/**
* Accessor for paddr.
*/
+ bool
+ hasPaddr()
+ {
+ return privateFlags.isSet(VALID_PADDR);
+ }
+
Addr
getPaddr()
{
- assert(flags.isSet(VALID_PADDR));
- return paddr;
+ assert(privateFlags.isSet(VALID_PADDR));
+ return _paddr;
}
/**
* Accessor for size.
*/
+ bool
+ hasSize()
+ {
+ return privateFlags.isSet(VALID_SIZE);
+ }
+
int
getSize()
{
- assert(flags.isSet(VALID_SIZE));
- return size;
+ assert(privateFlags.isSet(VALID_SIZE));
+ return _size;
}
/** Accessor for time. */
Tick
- getTime()
+ time() const
{
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- return time;
+ assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR));
+ return _time;
}
void
- setTime(Tick when)
+ time(Tick time)
{
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- time = when;
+ assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR));
+ _time = time;
}
/** Accessor for flags. */
Flags
getFlags()
{
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- return flags & PUBLIC_FLAGS;
- }
-
- Flags
- anyFlags(Flags _flags)
- {
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- assert(_flags.noneSet(~PUBLIC_FLAGS));
- return flags.isSet(_flags);
- }
-
- Flags
- allFlags(Flags _flags)
- {
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- assert(_flags.noneSet(~PUBLIC_FLAGS));
- return flags.allSet(_flags);
- }
-
- /** Accessor for flags. */
- void
- setFlags(Flags _flags)
- {
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- assert(_flags.noneSet(~PUBLIC_FLAGS));
- flags.set(_flags);
+ assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR));
+ return _flags;
}
+ /** Note that unlike other accessors, this function sets *specific
+ flags* (ORs them in); it does not assign its argument to the
+ _flags field. Thus this method should rightly be called
+ setFlags() and not just flags(). */
void
- clearFlags(Flags _flags)
+ setFlags(Flags flags)
{
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- assert(_flags.noneSet(~PUBLIC_FLAGS));
- flags.clear(_flags);
- }
-
- void
- clearFlags()
- {
- assert(flags.isSet(VALID_PADDR|VALID_VADDR));
- flags.clear(PUBLIC_FLAGS);
+ assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR));
+ _flags.set(flags);
}
/** Accessor function for vaddr.*/
Addr
getVaddr()
{
- assert(flags.isSet(VALID_VADDR));
- return vaddr;
+ assert(privateFlags.isSet(VALID_VADDR));
+ return _vaddr;
}
- /** Accessor function for asid.*/
- int
- getAsid()
+ /** Accesssor for the requestor id. */
+ MasterID
+ masterId()
{
- assert(flags.isSet(VALID_VADDR));
- return asid;
+ return _masterId;
}
- /** Accessor function for asi.*/
- uint8_t
- getAsi()
+ /** Accessor function for asid.*/
+ int
+ getAsid()
{
- assert(flags.isSet(VALID_VADDR));
- return flags & ASI_BITS;
+ assert(privateFlags.isSet(VALID_VADDR));
+ return _asid;
}
- /** Accessor function for asi.*/
+ /** Accessor function for asid.*/
void
- setAsi(uint8_t a)
- {
- assert(flags.isSet(VALID_VADDR));
- flags.update(a, ASI_BITS);
- }
-
- /** Accessor function for asi.*/
- bool
- isMmapedIpr()
+ setAsid(int asid)
{
- assert(flags.isSet(VALID_PADDR));
- return flags.isSet(MMAPED_IPR);
+ _asid = asid;
}
/** Accessor function for asi.*/
- void
- setMmapedIpr(bool r)
+ uint8_t
+ getAsi()
{
- assert(VALID_VADDR);
- flags.set(MMAPED_IPR);
+ assert(privateFlags.isSet(VALID_VADDR));
+ return _flags & ASI_BITS;
}
/** Accessor function to check if sc result is valid. */
bool
extraDataValid()
{
- return flags.isSet(VALID_EXTRA_DATA);
+ return privateFlags.isSet(VALID_EXTRA_DATA);
}
/** Accessor function for store conditional return value.*/
uint64_t
getExtraData() const
{
- assert(flags.isSet(VALID_EXTRA_DATA));
- return extraData;
+ assert(privateFlags.isSet(VALID_EXTRA_DATA));
+ return _extraData;
}
/** Accessor function for store conditional return value.*/
void
- setExtraData(uint64_t _extraData)
+ setExtraData(uint64_t extraData)
+ {
+ _extraData = extraData;
+ privateFlags.set(VALID_EXTRA_DATA);
+ }
+
+ bool
+ hasContextId() const
{
- extraData = _extraData;
- flags.set(VALID_EXTRA_DATA);
+ return privateFlags.isSet(VALID_CONTEXT_ID);
}
/** Accessor function for context ID.*/
int
contextId() const
{
- assert(flags.isSet(VALID_CONTEXT_ID));
+ assert(privateFlags.isSet(VALID_CONTEXT_ID));
return _contextId;
}
int
threadId() const
{
- assert(flags.isSet(VALID_THREAD_ID));
+ assert(privateFlags.isSet(VALID_THREAD_ID));
return _threadId;
}
- /** Accessor function for pc.*/
bool
hasPC() const
{
- return flags.isSet(VALID_PC);
+ return privateFlags.isSet(VALID_PC);
}
+ /** Accessor function for pc.*/
Addr
getPC() const
{
- assert(flags.isSet(VALID_PC));
- return pc;
+ assert(privateFlags.isSet(VALID_PC));
+ return _pc;
}
- /** Accessor Function to Check Cacheability. */
- bool isUncacheable() const { return flags.isSet(UNCACHEABLE); }
- bool isInstRead() const { return flags.isSet(INST_READ); }
- bool isLocked() const { return flags.isSet(LOCKED); }
- bool isSwap() const { return flags.isSet(MEM_SWAP|MEM_SWAP_COND); }
- bool isCondSwap() const { return flags.isSet(MEM_SWAP_COND); }
-
- bool
- isMisaligned() const
- {
- if (flags.isSet(NO_ALIGN_FAULT))
- return false;
-
- if ((vaddr & 0x1))
- return true;
-
- if (flags.isSet(NO_HALF_WORD_ALIGN_FAULT))
- return false;
-
- if ((vaddr & 0x2))
- return true;
-
- return false;
- }
+ /** 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); }
+ bool isInstFetch() const { return _flags.isSet(INST_FETCH); }
+ bool isPrefetch() const { return _flags.isSet(PREFETCH); }
+ bool isLLSC() const { return _flags.isSet(LLSC); }
+ bool isLocked() const { return _flags.isSet(LOCKED); }
+ bool isSwap() const { return _flags.isSet(MEM_SWAP|MEM_SWAP_COND); }
+ bool isCondSwap() const { return _flags.isSet(MEM_SWAP_COND); }
+ bool isMmappedIpr() const { return _flags.isSet(MMAPPED_IPR); }
+ bool isClearLL() const { return _flags.isSet(CLEAR_LL); }
};
#endif // __MEM_REQUEST_HH__
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