add ASICPlatform override of toolchain_prepare and some notes

[pinmux.git] / src / spec / testing_stage1.py

diff --git a/src/spec/testing_stage1.py b/src/spec/testing_stage1.py
index c9151aa08930c1c2762c220ebdb8ed20956a23bf..1a6873b250296ce4eaed4d3b39db4f445c938799 100644 (file)
--- a/src/spec/testing_stage1.py
+++ b/src/spec/testing_stage1.py
@@ -11,7 +11,7 @@ from copy import deepcopy
 from soc.bus.sram import SRAM
 
 from nmigen import Memory
-from nmigen.pysim import Simulator, Delay, Settle, Tick
+from nmigen.sim import Simulator, Delay, Settle, Tick
 
 from nmutil.util import wrap
 
@@ -19,6 +19,12 @@ from soc.debug.jtagutils import (jtag_read_write_reg,
                                  jtag_srv, jtag_set_reset,
                                  jtag_set_ir, jtag_set_get_dr)
 
+from c4m.nmigen.jtag.tap import TAP, IOType
+from c4m.nmigen.jtag.bus import Interface as JTAGInterface
+from soc.debug.dmi import DMIInterface, DBGCore
+from soc.debug.test.dmi_sim import dmi_sim
+from soc.debug.test.jtagremote import JTAGServer, JTAGClient
+
 # Was thinking of using these functions, but skipped for simplicity for now
 # XXX nope.  the output from JSON file.
 #from pinfunctions import (i2s, lpc, emmc, sdmmc, mspi, mquadspi, spi,
@@ -394,6 +400,12 @@ class ASICPlatform(TemplatedPlatform):
         m.d.comb += padpin.oe.eq(padport_oe)
         return m
 
+    def toolchain_prepare(self, fragment, name, **kwargs):
+        """override toolchain_prepare in order to grab the fragment
+        """
+        self.fragment = fragment
+        return super().toolchain_prepare(fragment, name, **kwargs)
+
 
 """
 and to create a Platform instance with that list, and build
@@ -409,6 +421,15 @@ print(pinset)
 resources = create_resources(pinset)
 p = ASICPlatform (resources, top.jtag)
 p.build(top)
+# this is what needs to gets treated as "top", after "main module" top
+# is augmented with IO pads with JTAG tacked on.  the expectation that
+# the get_input() etc functions will be called magically by some other
+# function is unrealistic.
+top_fragment = p.fragment
+
+# XXX these modules are all being added *AFTER* the build process links
+# everything together.  the expectation that this would work is... unrealistic.
+# ordering, clearly, is important.
 
 # dut = JTAG(test_pinset(), wb_data_wid=64, domain="sync")
 top.jtag.stop = False
@@ -420,31 +441,35 @@ cdut.cbus = JTAGInterface()
 
 # set up client-server on port 44843-something
 top.jtag.s = JTAGServer()
-if len(sys.argv) != 2 or sys.argv[1] != 'server':
-    cdut.c = JTAGClient()
-    top.jtag.s.get_connection()
-else:
-    print ("running server only as requested, use openocd remote to test")
-    sys.stdout.flush()
-    top.jtag.s.get_connection(None) # block waiting for connection
+cdut.c = JTAGClient()
+top.jtag.s.get_connection()
+#else:
+#    print ("running server only as requested, use openocd remote to test")
+#    sys.stdout.flush()
+#    top.jtag.s.get_connection(None) # block waiting for connection
 
 # take copy of ir_width and scan_len
 cdut._ir_width = top.jtag._ir_width
 cdut.scan_len = top.jtag.scan_len
 
 memory = Memory(width=64, depth=16)
-sram = SRAM(memory=memory, bus=dut.wb)
+sram = SRAM(memory=memory, bus=top.jtag.wb)
 
 #m = Module()
 #m.submodules.ast = dut
 #m.submodules.sram = sram
 
+# XXX simulating top (the module that does not itself contain IO pads
+# because that's covered by build) cannot possibly be expected to work
+# particularly when modules have been added *after* the platform build()
+# function has been called.
+
 sim = Simulator(top)
 sim.add_clock(1e-6, domain="sync")      # standard clock
 
 sim.add_sync_process(wrap(jtag_srv(top))) #? jtag server
-if len(sys.argv) != 2 or sys.argv[1] != 'server':
-    sim.add_sync_process(wrap(jtag_sim(cdut, top.jtag))) # actual jtag tester
+#if len(sys.argv) != 2 or sys.argv[1] != 'server':
+sim.add_sync_process(wrap(jtag_sim(cdut, top.jtag))) # actual jtag tester
 sim.add_sync_process(wrap(dmi_sim(top.jtag)))  # handles (pretends to be) DMI
 
 with sim.write_vcd("dmi2jtag_test_srv.vcd"):