ext: Include SystemC 2.3.1 into gem5

In the past it happened several times that some changes in gem5 broke the
SystemC coupling. Recently Accelera has changed the licence for SystemC
from their own licence to Apache2.0, which is compatible with gem5.
However, SystemC usually relies on the Boost library, but I was able to
exchange the boost calls by c++11 alternatives. The recent SystemC version
is placed into /ext and is integrated into gem5's build system. The goal is
to integrate some SystemC tests for the CI in some following patches.

Change-Id: I4b66ec806b5e3cffc1d7c85d3735ff4fa5b31fd0
Reviewed-on: https://gem5-review.googlesource.com/2240
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

1 files changed, 192 insertions, 0 deletions

diff --git a/ext/systemc/src/sysc/qt/qt.h b/ext/systemc/src/sysc/qt/qt.h
new file mode 100644
index 000000000..40a9f531b
--- /dev/null
+++ b/ext/systemc/src/sysc/qt/qt.h
@@ -0,0 +1,192 @@
+/*
+ * QuickThreads -- Threads-building toolkit.
+ * Copyright (c) 1993 by David Keppel
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that the above copyright notice and this notice
+ * appear in all copies.  This software is provided as a
+ * proof-of-concept and for demonstration purposes; there is no
+ * representation about the suitability of this software for any
+ * purpose.
+ */
+
+#ifndef QUICKTHREADS_QT_H
+#define QUICKTHREADS_QT_H
+
+#if !defined(SC_USE_PTHREADS)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sysc/qt/qtmd.h>
+
+
+/* A QuickThreads thread is represented by it's current stack pointer.
+   To restart a thread, you merely need pass the current sp (qt_t*) to
+   a QuickThreads primitive.  `qt_t*' is a location on the stack.  To
+   improve type checking, represent it by a particular struct. */
+
+typedef struct qt_t {
+  char dummy;
+} qt_t;
+
+
+/* Alignment is guaranteed to be a power of two. */
+#ifndef QUICKTHREADS_STKALIGN
+  #error "Need to know the machine-dependent stack alignment."
+#endif
+
+#define QUICKTHREADS_STKROUNDUP(bytes) \
+  (((bytes)+QUICKTHREADS_STKALIGN) & ~(QUICKTHREADS_STKALIGN-1))
+
+
+/* Find ``top'' of the stack, space on the stack. */
+#ifndef QUICKTHREADS_SP
+#ifdef QUICKTHREADS_GROW_DOWN
+#define QUICKTHREADS_SP(sto, size)	((qt_t *)(&((char *)(sto))[(size)]))
+#endif
+#ifdef QUICKTHREADS_GROW_UP
+#define QUICKTHREADS_SP(sto, size)	((qt_t *)(sto))
+#endif
+#if !defined(QUICKTHREADS_SP)
+  #error "QUICKTHREADS_QT_H: Stack must grow up or down!"
+#endif
+#endif
+
+
+/* The type of the user function:
+   For non-varargs, takes one void* function.
+   For varargs, takes some number of arguments. */
+typedef void *(qt_userf_t)(void *pu);
+typedef void *(qt_vuserf_t)(int arg0, ...);
+
+/* For non-varargs, just call a client-supplied function,
+   it does all startup and cleanup, and also calls the user's
+   function. */
+typedef void (qt_only_t)(void *pu, void *pt, qt_userf_t *userf);
+
+/* For varargs, call `startup', then call the user's function,
+   then call `cleanup'. */
+typedef void (qt_startup_t)(void *pt);
+typedef void (qt_cleanup_t)(void *pt, void *vuserf_return);
+
+
+/* Internal helper for putting stuff on stack. */
+#ifndef QUICKTHREADS_SPUT
+#define QUICKTHREADS_SPUT(top, at, val)	\
+    (((qt_word_t *)(top))[(at)] = (qt_word_t)(val))
+#endif
+
+
+/* Push arguments for the non-varargs case. */
+#ifndef QUICKTHREADS_ARGS
+
+#ifndef QUICKTHREADS_ARGS_MD
+#define QUICKTHREADS_ARGS_MD (0)
+#endif
+
+#ifndef QUICKTHREADS_STKBASE
+  #error "Need to know the machine-dependent stack allocation."
+#endif
+
+/* All things are put on the stack relative to the final value of
+   the stack pointer. */
+#ifdef QUICKTHREADS_GROW_DOWN
+#define QUICKTHREADS_ADJ(sp)	(((char *)sp) - QUICKTHREADS_STKBASE)
+#else
+#define QUICKTHREADS_ADJ(sp)	(((char *)sp) + QUICKTHREADS_STKBASE)
+#endif
+
+#define QUICKTHREADS_ARGS(sp, pu, pt, userf, only) \
+    (QUICKTHREADS_ARGS_MD (QUICKTHREADS_ADJ(sp)), \
+     QUICKTHREADS_SPUT (QUICKTHREADS_ADJ(sp), QUICKTHREADS_ONLY_INDEX, only), \
+     QUICKTHREADS_SPUT (QUICKTHREADS_ADJ(sp), QUICKTHREADS_USER_INDEX, userf), \
+     QUICKTHREADS_SPUT (QUICKTHREADS_ADJ(sp), QUICKTHREADS_ARGT_INDEX, pt), \
+     QUICKTHREADS_SPUT (QUICKTHREADS_ADJ(sp), QUICKTHREADS_ARGU_INDEX, pu), \
+     ((qt_t *)QUICKTHREADS_ADJ(sp)))
+
+#endif
+
+
+/* Push arguments for the varargs case.
+   Has to be a function call because initialization is an expression
+   and we need to loop to copy nbytes of stuff on to the stack.
+   But that's probably OK, it's not terribly cheap, anyway. */
+
+#ifdef QUICKTHREADS_VARGS_DEFAULT
+#ifndef QUICKTHREADS_VARGS_MD0
+#define QUICKTHREADS_VARGS_MD0(sp, vasize)	(sp)
+#endif
+#ifndef QUICKTHREADS_VARGS_MD1
+#define QUICKTHREADS_VARGS_MD1(sp)	do { ; } while (0)
+#endif
+
+#ifndef QUICKTHREADS_VSTKBASE
+  #error "Need base stack size for varargs functions."
+#endif
+
+/* Sometimes the stack pointer needs to munged a bit when storing
+   the list of arguments. */
+#ifndef QUICKTHREADS_VARGS_ADJUST
+#define QUICKTHREADS_VARGS_ADJUST(sp)	(sp)
+#endif
+
+/* All things are put on the stack relative to the final value of
+   the stack pointer. */
+#ifdef QUICKTHREADS_GROW_DOWN
+#define QUICKTHREADS_VADJ(sp)	(((char *)sp) - QUICKTHREADS_VSTKBASE)
+#else
+#define QUICKTHREADS_VADJ(sp)	(((char *)sp) + QUICKTHREADS_VSTKBASE)
+#endif
+
+extern qt_t *qt_vargs (qt_t *sp, int nbytes, void *vargs,
+		       void *pt, qt_startup_t *startup,
+		       qt_vuserf_t *vuserf, qt_cleanup_t *cleanup);
+
+#ifndef QUICKTHREADS_VARGS
+#define QUICKTHREADS_VARGS(sp, nbytes, vargs, pt, startup, vuserf, cleanup) \
+      (qt_vargs (sp, nbytes, vargs, pt, startup, vuserf, cleanup))
+#endif
+
+#endif
+
+
+/* Save the state of the thread and call the helper function
+   using the stack of the new thread. */
+typedef void *(qt_helper_t)(qt_t *old, void *a0, void *a1);
+typedef void *(qt_block_t)(qt_helper_t *helper, void *a0, void *a1,
+			  qt_t *newthread);
+
+/* Rearrange the parameters so that things passed to the helper
+   function are already in the right argument registers. */
+#ifndef QUICKTHREADS_ABORT
+extern void *qt_abort (qt_helper_t *h, void *a0, void *a1, qt_t *newthread);
+/* The following does, technically, `return' a value, but the
+   user had better not rely on it, since the function never
+   returns. */ 
+#define QUICKTHREADS_ABORT(h, a0, a1, newthread) \
+    do { qt_abort (h, a0, a1, newthread); } while (0)
+#endif
+
+#ifndef QUICKTHREADS_BLOCK
+extern void *qt_block (qt_helper_t *h, void *a0, void *a1,
+		       qt_t *newthread);
+#define QUICKTHREADS_BLOCK(h, a0, a1, newthread) \
+    (qt_block (h, a0, a1, newthread))
+#endif
+
+#ifndef QUICKTHREADS_BLOCKI
+extern void *qt_blocki (qt_helper_t *h, void *a0, void *a1,
+			qt_t *newthread);
+#define QUICKTHREADS_BLOCKI(h, a0, a1, newthread) \
+    (qt_blocki (h, a0, a1, newthread))
+#endif
+
+#ifdef __cplusplus
+}		/* Match `extern "C" {' at top. */
+#endif
+
+#endif // !defined(SC_USE_PTHREADS)
+#endif /* ndef QUICKTHREADS_H */