* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
+ * Copyright (c) 2010,2015 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
typedef uint8_t ArchFlagsType;
typedef ::Flags<FlagsType> Flags;
- /**
- * Architecture specific flags.
- *
- * These bits int the flag field are reserved for
- * architecture-specific code. For example, SPARC uses them to
- * represent ASIs.
- */
- static const FlagsType ARCH_BITS = 0x000000FF;
- /** 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 VPTE = 0x00000400;
- /** Use the alternate mode bits in ALPHA. */
- static const FlagsType ALTMODE = 0x00000800;
- /** The request is to an uncacheable address. */
- static const FlagsType UNCACHEABLE = 0x00001000;
- /** 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;
- /** This request is made in privileged mode. */
- static const FlagsType PRIVILEGED = 0x00008000;
-
- /** This is a write that is targeted and zeroing an entire cache block.
- * There is no need for a read/modify/write
- */
- static const FlagsType CACHE_BLOCK_ZERO = 0x00010000;
-
- /** The request should not cause a memory access. */
- 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 = 0x02000000;
- /** The request should be marked as LRU. */
- static const FlagsType EVICT_NEXT = 0x04000000;
-
- /** The request should be handled by the generic IPR code (only
- * valid together with MMAPPED_IPR) */
- static const FlagsType GENERIC_IPR = 0x08000000;
-
- /** The request targets the secure memory space. */
- static const FlagsType SECURE = 0x10000000;
- /** The request is a page table walk */
- static const FlagsType PT_WALK = 0x20000000;
-
- /** 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
+ enum : FlagsType {
+ /**
+ * Architecture specific flags.
+ *
+ * These bits int the flag field are reserved for
+ * architecture-specific code. For example, SPARC uses them to
+ * represent ASIs.
+ */
+ ARCH_BITS = 0x000000FF,
+ /** The request was an instruction fetch. */
+ INST_FETCH = 0x00000100,
+ /** The virtual address is also the physical address. */
+ PHYSICAL = 0x00000200,
+ /**
+ * The request is to an uncacheable address.
+ *
+ * @note Uncacheable accesses may be reordered by CPU models. The
+ * STRICT_ORDER flag should be set if such reordering is
+ * undesirable.
+ */
+ UNCACHEABLE = 0x00000400,
+ /**
+ * The request is required to be strictly ordered by <i>CPU
+ * models</i> and is non-speculative.
+ *
+ * A strictly ordered request is guaranteed to never be
+ * re-ordered or executed speculatively by a CPU model. The
+ * memory system may still reorder requests in caches unless
+ * the UNCACHEABLE flag is set as well.
+ */
+ STRICT_ORDER = 0x00000800,
+ /** This request is to a memory mapped register. */
+ MMAPPED_IPR = 0x00002000,
+ /** This request is made in privileged mode. */
+ PRIVILEGED = 0x00008000,
+
+ /**
+ * This is a write that is targeted and zeroing an entire
+ * cache block. There is no need for a read/modify/write
+ */
+ CACHE_BLOCK_ZERO = 0x00010000,
+
+ /** The request should not cause a memory access. */
+ 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.
+ */
+ LOCKED_RMW = 0x00100000,
+ /** The request is a Load locked/store conditional. */
+ LLSC = 0x00200000,
+ /** This request is for a memory swap. */
+ MEM_SWAP = 0x00400000,
+ MEM_SWAP_COND = 0x00800000,
+
+ /** The request is a prefetch. */
+ PREFETCH = 0x01000000,
+ /** The request should be prefetched into the exclusive state. */
+ PF_EXCLUSIVE = 0x02000000,
+ /** The request should be marked as LRU. */
+ EVICT_NEXT = 0x04000000,
+
+ /**
+ * The request should be handled by the generic IPR code (only
+ * valid together with MMAPPED_IPR)
+ */
+ GENERIC_IPR = 0x08000000,
+
+ /** The request targets the secure memory space. */
+ SECURE = 0x10000000,
+ /** The request is a page table walk */
+ PT_WALK = 0x20000000,
+
+ /**
+ * These flags are *not* cleared when a Request object is
+ * reused (assigned a new address).
+ */
+ STICKY_FLAGS = INST_FETCH
+ };
+
+ /** Master 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;
+ enum : MasterID {
+ /** This master id is used for writeback requests by the caches */
+ wbMasterId = 0,
+ /**
+ * This master id is used for functional requests that
+ * don't come from a particular device
+ */
+ funcMasterId = 1,
+ /** This master id is used for message signaled interrupts */
+ intMasterId = 2,
+ /**
+ * Invalid master id for assertion checking only. It is
+ * invalid behavior to ever send this id as part of a request.
+ */
+ invldMasterId = std::numeric_limits<MasterID>::max()
+ };
/** @} */
- /** Invalid or unknown Pid. Possible when operating system is not present
- * or has not assigned a pid yet */
- static const uint32_t invldPid = UINT_MAX;
-
private:
typedef uint8_t PrivateFlagsType;
typedef ::Flags<PrivateFlagsType> PrivateFlags;
- /** Whether or not the size is valid. */
- static const PrivateFlagsType VALID_SIZE = 0x00000001;
- /** Whether or not paddr is valid (has been written yet). */
- static const PrivateFlagsType VALID_PADDR = 0x00000002;
- /** Whether or not the vaddr & asid are valid. */
- static const PrivateFlagsType VALID_VADDR = 0x00000004;
- /** Whether or not the pc is valid. */
- static const PrivateFlagsType VALID_PC = 0x00000010;
- /** Whether or not the context ID is valid. */
- static const PrivateFlagsType VALID_CONTEXT_ID = 0x00000020;
- static const PrivateFlagsType VALID_THREAD_ID = 0x00000040;
- /** Whether or not the sc result is valid. */
- 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;
+ enum : PrivateFlagsType {
+ /** Whether or not the size is valid. */
+ VALID_SIZE = 0x00000001,
+ /** Whether or not paddr is valid (has been written yet). */
+ VALID_PADDR = 0x00000002,
+ /** Whether or not the vaddr & asid are valid. */
+ VALID_VADDR = 0x00000004,
+ /** Whether or not the pc is valid. */
+ VALID_PC = 0x00000010,
+ /** Whether or not the context ID is valid. */
+ VALID_CONTEXT_ID = 0x00000020,
+ 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).
+ */
+ STICKY_PRIVATE_FLAGS = VALID_CONTEXT_ID | VALID_THREAD_ID
+ };
private:
uint64_t _extraData;
/** The context ID (for statistics, typically). */
- int _contextId;
+ ContextID _contextId;
/** The thread ID (id within this CPU) */
- int _threadId;
+ ThreadID _threadId;
/** program counter of initiating access; for tracing/debugging */
Addr _pc;
}
Request(int asid, Addr vaddr, unsigned size, Flags flags, MasterID mid,
- Addr pc,
- int cid, ThreadID tid)
+ Addr pc, 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),
* Set up CPU and thread numbers.
*/
void
- setThreadContext(int context_id, ThreadID tid)
+ setThreadContext(ContextID context_id, ThreadID tid)
{
_contextId = context_id;
_threadId = tid;
setVirt(int asid, Addr vaddr, unsigned size, Flags flags, MasterID mid,
Addr pc)
{
- assert(size >= 0);
_asid = asid;
_vaddr = vaddr;
_size = size;
return privateFlags.isSet(VALID_SIZE);
}
- int
+ unsigned
getSize() const
{
assert(privateFlags.isSet(VALID_SIZE));
return _time;
}
- void
- time(Tick time)
- {
- assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR));
- _time = time;
- }
-
/** Accessor for flags. */
Flags
getFlags()
}
/** 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(). */
+ 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
setFlags(Flags flags)
{
_flags.set(flags);
}
- void
- setArchFlags(Flags flags)
- {
- assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR));
- _flags.set(flags & ARCH_BITS);
- }
-
/** Accessor function for vaddr.*/
bool
hasVaddr() const
}
/** Accessor function for context ID.*/
- int
+ ContextID
contextId() const
{
assert(privateFlags.isSet(VALID_CONTEXT_ID));
}
/** Accessor function for thread ID. */
- int
+ ThreadID
threadId() const
{
assert(privateFlags.isSet(VALID_THREAD_ID));
Tick getAccessLatency() const { return accessDelta; }
/** Accessor functions for flags. Note that these are for testing
- only; setting flags should be done via setFlags(). */
+ only; setting flags should be done via setFlags(). */
bool isUncacheable() const { return _flags.isSet(UNCACHEABLE); }
+ bool isStrictlyOrdered() const { return _flags.isSet(STRICT_ORDER); }
bool isInstFetch() const { return _flags.isSet(INST_FETCH); }
bool isPrefetch() const { return _flags.isSet(PREFETCH); }
bool isLLSC() const { return _flags.isSet(LLSC); }
bool isPriv() const { return _flags.isSet(PRIVILEGED); }
- bool isLocked() const { return _flags.isSet(LOCKED); }
+ bool isLockedRMW() const { return _flags.isSet(LOCKED_RMW); }
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); }
bool isSecure() const { return _flags.isSet(SECURE); }
bool isPTWalk() const { return _flags.isSet(PT_WALK); }
};
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