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, 97 insertions, 0 deletions

diff --git a/ext/systemc/src/tlm_core/tlm_1/README.txt b/ext/systemc/src/tlm_core/tlm_1/README.txt
new file mode 100644
index 000000000..c7e1c5e1f
--- /dev/null
+++ b/ext/systemc/src/tlm_core/tlm_1/README.txt
@@ -0,0 +1,97 @@
+TLM-1.0 header files
+====================
+
+Dir: include/tlm_core/tlm_1/
+
+SubDirs: tlm_analysis/
+	 tlm_req_rsp/
+
+Files: README.txt
+
+
+Comments
+========
+
+User code should only #include the tlm or tlm.h header file in the include/
+directory and avoid including any of the include files in this directory
+directly.  All objects defined in this file hierarchy are in the tlm namespace.
+
+The header files are organizated, by subdirectory, as follows:
+
+
+tlm_analysis/ 
+--------------
+
+This contains the analysis interfaces, ports, and fifos. These files were not
+part of the original TLM-1.0 release, but have been grouped with TLM-1.0 in this
+release of TLM-2.0
+
+Files:
+  tlm_analysis.h        (includes the other header files in this directory )
+  tlm_analysis_fifo.h   (defines tlm_analysis_fifo )
+  tlm_analysis_if.h     (defines tlm_analysis_if and tlm_delayed_analysis_if )
+  tlm_analysis_port.h   (defines tlm_analysis_port )
+  tlm_analysis_triple.h (defines tlm_analysis_triple )
+  tlm_write_if.h        (defines tlm_write_if and tlm_delayed_write_if )
+
+
+tlm_req_rsp/
+------------
+
+This provides support for TLM modeling based on a request/response pair that 
+are passed by value. This is the original TLM 1.0 standard, with the addition 
+of an overloading of the blocking transport method with pass-by-reference arguments.
+
+Files:
+  tlm_req_rsp.h  (includes the key header files from the other directories)
+
+  tlm_1_interfaces/
+      tlm_core_ifs.h          (defines the TLM 1.0 core interfaces:
+					tlm_transport_if
+					tlm_blocking_get_if
+					tlm_blocking_put_if
+					tlm_nonblocking_get_if
+					tlm_nonblocking_put_if
+					tlm_get_if 
+					tlm_put_if 
+					tlm_blocking_peek_if
+					tlm_nonblocking_peek_if
+					tlm_peek_if 
+					tlm_blocking_get_peek_if 
+					tlm_nonblocking_get_peek_if 
+					tlm_get_peek_if              )     
+      tlm_fifo_ifs.h	     ( defines the TLM1.0 fifo interfaces:
+					tlm_fifo_debug_if			
+					tlm_fifo_put_if
+					tlm_fifo_get_if
+					tlm_fifo_config_size_if )
+      tlm_master_slave_ifs.h ( defines the TLM1.0 master slave interfaces:
+					tlm_blocking_master_if
+					tlm_blocking_slave_if
+					tlm_nonblocking_master_if
+					tlm_nonblocking_slave_if 
+					tlm_master_if 
+					tlm_slave_if )
+      tlm_tag.h	             ( defines tlm_tag )
+
+  tlm_ports/
+      tlm_nonblocking_port.h (defines tlm_nonblocking_put_port, 
+                                      tlm_nonblocking_get_port and
+				      tlm_nonblocking_peek_port )
+      tlm_event_finder.h     (defines tlm_event_finder_t )
+
+  tlm_channels/
+      tlm_fifo/
+          tlm_fifo.h         (defines tlm_fifo, includes the other files )
+          tlm_fifo_peek.h    (defines peek and poke interfaces for tlm_fifo )
+          tlm_fifo_put_get.h (defines put and get interfaces for tlm_fifo )
+          tlm_fifo_resize.h  (defines expand, reduce, bound and unbound
+	                      interfaces for tlm_fifo )
+          circular_buffer.h  (defines circular buffer used by tlm_fifo )
+      tlm_req_rsp_channels/
+          tlm_req_rsp_channels.h (defines tlm_req_rsp_channel and
+	  			          tlm_transport_channel )
+          tlm_put_get_imp.h      (contains implementatins used by the channels)
+
+  tlm_adapters/
+  	tlm_adapters.h  (defines transport_to_master and tlm_slave_to_transport)