From aa8c6e9c959eab4d516bc07593bea20ade9ad80c Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Fri, 13 Aug 2010 06:16:02 -0700
Subject: CPU: Add readBytes and writeBytes functions to the exec contexts.

---
 src/cpu/base_dyn_inst.hh | 57 +++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 44 insertions(+), 13 deletions(-)

(limited to 'src/cpu/base_dyn_inst.hh')

diff --git a/src/cpu/base_dyn_inst.hh b/src/cpu/base_dyn_inst.hh
index a9ba12958..3ecec0f0c 100644
--- a/src/cpu/base_dyn_inst.hh
+++ b/src/cpu/base_dyn_inst.hh
@@ -120,6 +120,8 @@ class BaseDynInst : public FastAlloc, public RefCounted
     template <class T>
     Fault read(Addr addr, T &data, unsigned flags);
 
+    Fault readBytes(Addr addr, uint8_t *data, unsigned size, unsigned flags);
+
     /**
      * Does a write to a given address.
      * @param data The data to be written.
@@ -131,6 +133,9 @@ class BaseDynInst : public FastAlloc, public RefCounted
     template <class T>
     Fault write(T data, Addr addr, unsigned flags, uint64_t *res);
 
+    Fault writeBytes(uint8_t *data, unsigned size,
+                     Addr addr, unsigned flags, uint64_t *res);
+
     /** Splits a request in two if it crosses a dcache block. */
     void splitRequest(RequestPtr req, RequestPtr &sreqLow,
                       RequestPtr &sreqHigh);
@@ -867,12 +872,12 @@ class BaseDynInst : public FastAlloc, public RefCounted
 };
 
 template<class Impl>
-template<class T>
-inline Fault
-BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
+Fault
+BaseDynInst<Impl>::readBytes(Addr addr, uint8_t *data,
+                             unsigned size, unsigned flags)
 {
     reqMade = true;
-    Request *req = new Request(asid, addr, sizeof(T), flags, this->PC,
+    Request *req = new Request(asid, addr, size, flags, this->PC,
                                thread->contextId(), threadNumber);
 
     Request *sreqLow = NULL;
@@ -889,11 +894,6 @@ BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
         effAddrValid = true;
         fault = cpu->read(req, sreqLow, sreqHigh, data, lqIdx);
     } else {
-
-        // Return a fixed value to keep simulation deterministic even
-        // along misspeculated paths.
-        data = (T)-1;
-
         // Commit will have to clean up whatever happened.  Set this
         // instruction as executed.
         this->setExecuted();
@@ -901,7 +901,6 @@ BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
 
     if (traceData) {
         traceData->setAddr(addr);
-        traceData->setData(data);
     }
 
     return fault;
@@ -910,15 +909,35 @@ BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
 template<class Impl>
 template<class T>
 inline Fault
-BaseDynInst<Impl>::write(T data, Addr addr, unsigned flags, uint64_t *res)
+BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags)
 {
+    Fault fault = readBytes(addr, (uint8_t *)&data, sizeof(T), flags);
+
+    if (fault != NoFault) {
+        // Return a fixed value to keep simulation deterministic even
+        // along misspeculated paths.
+        data = (T)-1;
+    }
+    data = TheISA::gtoh(data);
+
     if (traceData) {
-        traceData->setAddr(addr);
         traceData->setData(data);
     }
 
+    return fault;
+}
+
+template<class Impl>
+Fault
+BaseDynInst<Impl>::writeBytes(uint8_t *data, unsigned size,
+                              Addr addr, unsigned flags, uint64_t *res)
+{
+    if (traceData) {
+        traceData->setAddr(addr);
+    }
+
     reqMade = true;
-    Request *req = new Request(asid, addr, sizeof(T), flags, this->PC,
+    Request *req = new Request(asid, addr, size, flags, this->PC,
                                thread->contextId(), threadNumber);
 
     Request *sreqLow = NULL;
@@ -939,6 +958,18 @@ BaseDynInst<Impl>::write(T data, Addr addr, unsigned flags, uint64_t *res)
     return fault;
 }
 
+template<class Impl>
+template<class T>
+inline Fault
+BaseDynInst<Impl>::write(T data, Addr addr, unsigned flags, uint64_t *res)
+{
+    if (traceData) {
+        traceData->setData(data);
+    }
+    data = TheISA::htog(data);
+    return writeBytes((uint8_t *)&data, sizeof(T), addr, flags, res);
+}
+
 template<class Impl>
 inline void
 BaseDynInst<Impl>::splitRequest(RequestPtr req, RequestPtr &sreqLow,
-- 
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