rename store conditional stuff as extra data so it can be used for conditional swaps as well

Add support for a twin 64 bit int load
Add Memory barrier and write barrier flags as appropriate
Make atomic memory ops atomic

src/arch/alpha/isa/mem.isa:
src/arch/alpha/locked_mem.hh:
src/cpu/base_dyn_inst.hh:
src/mem/cache/cache_blk.hh:
src/mem/cache/cache_impl.hh:
    rename store conditional stuff as extra data so it can be used for conditional swaps as well
src/arch/alpha/types.hh:
src/arch/mips/types.hh:
src/arch/sparc/types.hh:
    add a largest read data type for statically allocating read buffers in atomic simple cpu
src/arch/isa_parser.py:
    Add support for a twin 64 bit int load
src/arch/sparc/isa/decoder.isa:
    Make atomic memory ops atomic
    Add Memory barrier and write barrier flags as appropriate
src/arch/sparc/isa/formats/mem/basicmem.isa:
    add post access code block and define a twinload format for twin loads
src/arch/sparc/isa/formats/mem/blockmem.isa:
    remove old microcoded twin load coad
src/arch/sparc/isa/formats/mem/mem.isa:
    swap.isa replaces the code in loadstore.isa
src/arch/sparc/isa/formats/mem/util.isa:
    add a post access code block
src/arch/sparc/isa/includes.isa:
    need bigint.hh for Twin64_t
src/arch/sparc/isa/operands.isa:
    add a twin 64 int type
src/cpu/simple/atomic.cc:
src/cpu/simple/atomic.hh:
src/cpu/simple/base.hh:
src/cpu/simple/timing.cc:
    add support for twinloads
    add support for swap and conditional swap instructions
    rename store conditional stuff as extra data so it can be used for conditional swaps as well
src/mem/packet.cc:
src/mem/packet.hh:
    Add support for atomic swap memory commands
src/mem/packet_access.hh:
    Add endian conversion function for Twin64_t type
src/mem/physical.cc:
src/mem/physical.hh:
src/mem/request.hh:
    Add support for atomic swap memory commands
    Rename sc code to extradata

--HG--
extra : convert_revision : 69d908512fb34a4e28b29a6e58b807fb1a6b1656

1 files changed, 25 insertions, 3 deletions

diff --git a/src/cpu/simple/atomic.cc b/src/cpu/simple/atomic.cc
index fa47b0eee..6904ed936 100644
--- a/src/cpu/simple/atomic.cc
+++ b/src/cpu/simple/atomic.cc
@@ -31,6 +31,7 @@
 #include "arch/locked_mem.hh"
 #include "arch/mmaped_ipr.hh"
 #include "arch/utility.hh"
+#include "base/bigint.hh"
 #include "cpu/exetrace.hh"
 #include "cpu/simple/atomic.hh"
 #include "mem/packet.hh"
@@ -151,6 +152,8 @@ AtomicSimpleCPU::AtomicSimpleCPU(Params *p)
     data_write_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too
     data_write_pkt = new Packet(data_write_req, MemCmd::WriteReq,
                                 Packet::Broadcast);
+    data_swap_pkt = new Packet(data_write_req, MemCmd::SwapReq,
+                                Packet::Broadcast);
 }
 
 
@@ -318,6 +321,10 @@ AtomicSimpleCPU::read(Addr addr, T &data, unsigned flags)
 
 template
 Fault
+AtomicSimpleCPU::read(Addr addr, Twin64_t &data, unsigned flags);
+
+template
+Fault
 AtomicSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags);
 
 template
@@ -363,10 +370,15 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
 {
     // use the CPU's statically allocated write request and packet objects
     Request *req = data_write_req;
-    PacketPtr pkt = data_write_pkt;
+    PacketPtr pkt;
 
     req->setVirt(0, addr, sizeof(T), flags, thread->readPC());
 
+    if (req->isSwap())
+        pkt = data_swap_pkt;
+    else
+        pkt = data_write_pkt;
+
     if (traceData) {
         traceData->setAddr(addr);
     }
@@ -381,6 +393,11 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
         if (req->isLocked()) {
             do_access = TheISA::handleLockedWrite(thread, req);
         }
+        if (req->isCondSwap()) {
+             assert(res);
+             req->setExtraData(*res);
+        }
+
 
         if (do_access) {
             pkt->reinitFromRequest();
@@ -401,14 +418,19 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
 #endif
         }
 
+        if (req->isSwap()) {
+            assert(res);
+            *res = pkt->get<T>();
+        }
+
         if (req->isLocked()) {
-            uint64_t scResult = req->getScResult();
+            uint64_t scResult = req->getExtraData();
             if (scResult != 0) {
                 // clear failure counter
                 thread->setStCondFailures(0);
             }
             if (res) {
-                *res = req->getScResult();
+                *res = req->getExtraData();
             }
         }
     }