base: Declare a type for context IDs

Context IDs used to be declared as ad hoc (usually as int). This
changeset introduces a typedef for ContextIDs and a constant for
invalid context IDs.

6 files changed, 11 insertions, 11 deletions

diff --git a/src/cpu/base_dyn_inst.hh b/src/cpu/base_dyn_inst.hh
index 5b54679c9..aae3af495 100644
--- a/src/cpu/base_dyn_inst.hh
+++ b/src/cpu/base_dyn_inst.hh
@@ -460,7 +460,7 @@ class BaseDynInst : public ExecContext, public RefCounted
     MasterID masterId() const { return cpu->dataMasterId(); }
 
     /** Read this context's system-wide ID **/
-    int contextId() const { return thread->contextId(); }
+    ContextID contextId() const { return thread->contextId(); }
 
     /** Returns the fault type. */
     Fault getFault() const { return fault; }
diff --git a/src/cpu/checker/thread_context.hh b/src/cpu/checker/thread_context.hh
index 71c231ba0..5fcb82f6d 100644
--- a/src/cpu/checker/thread_context.hh
+++ b/src/cpu/checker/thread_context.hh
@@ -96,9 +96,9 @@ class CheckerThreadContext : public ThreadContext
 
     int cpuId() const { return actualTC->cpuId(); }
 
-    int contextId() const { return actualTC->contextId(); }
+    ContextID contextId() const { return actualTC->contextId(); }
 
-    void setContextId(int id)
+    void setContextId(ContextID id)
     {
        actualTC->setContextId(id);
        checkerTC->setContextId(id);
diff --git a/src/cpu/minor/exec_context.hh b/src/cpu/minor/exec_context.hh
index 80d5d9872..3e4ea5ea9 100644
--- a/src/cpu/minor/exec_context.hh
+++ b/src/cpu/minor/exec_context.hh
@@ -254,7 +254,7 @@ class ExecContext : public ::ExecContext
     unsigned int readStCondFailures() const { return 0; }
     void setStCondFailures(unsigned int st_cond_failures) {}
 
-    int contextId() { return thread.contextId(); }
+    ContextID contextId() { return thread.contextId(); }
     /* ISA-specific (or at least currently ISA singleton) functions */
 
     /* X86: TLB twiddling */
diff --git a/src/cpu/o3/thread_context.hh b/src/cpu/o3/thread_context.hh
index 87d87900c..87b7d9198 100755
--- a/src/cpu/o3/thread_context.hh
+++ b/src/cpu/o3/thread_context.hh
@@ -101,7 +101,7 @@ class O3ThreadContext : public ThreadContext
     /** Reads this CPU's Socket ID. */
     virtual uint32_t socketId() const { return cpu->socketId(); }
 
-    virtual int contextId() const { return thread->contextId(); }
+    virtual ContextID contextId() const { return thread->contextId(); }
 
     virtual void setContextId(int id) { thread->setContextId(id); }
 
diff --git a/src/cpu/thread_context.cc b/src/cpu/thread_context.cc
index fe1ae69dd..01ea51f26 100644
--- a/src/cpu/thread_context.cc
+++ b/src/cpu/thread_context.cc
@@ -95,9 +95,9 @@ ThreadContext::compare(ThreadContext *one, ThreadContext *two)
     if (id1 != id2)
         panic("CPU ids don't match, one: %d, two: %d", id1, id2);
 
-    id1 = one->contextId();
-    id2 = two->contextId();
-    if (id1 != id2)
+    const ContextID cid1 = one->contextId();
+    const ContextID cid2 = two->contextId();
+    if (cid1 != cid2)
         panic("Context ids don't match, one: %d, two: %d", id1, id2);
 
 
diff --git a/src/cpu/thread_state.hh b/src/cpu/thread_state.hh
index 485c9306f..bd471e13a 100644
--- a/src/cpu/thread_state.hh
+++ b/src/cpu/thread_state.hh
@@ -71,9 +71,9 @@ struct ThreadState : public Serializable {
 
     uint32_t socketId() const { return baseCpu->socketId(); }
 
-    int contextId() const { return _contextId; }
+    ContextID contextId() const { return _contextId; }
 
-    void setContextId(int id) { _contextId = id; }
+    void setContextId(ContextID id) { _contextId = id; }
 
     void setThreadId(ThreadID id) { _threadId = id; }
 
@@ -153,7 +153,7 @@ struct ThreadState : public Serializable {
     BaseCPU *baseCpu;
 
     // system wide HW context id
-    int _contextId;
+    ContextID _contextId;
 
     // Index of hardware thread context on the CPU that this represents.
     ThreadID _threadId;