From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Thu, 8 Apr 2021 12:46:11 +0000 (+0100)
Subject: add openocd jtag script
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=17ba9fe15e6b930f94055597af1187f67c1dbee6;p=soc-cxxrtl-sim.git

add openocd jtag script
---

diff --git a/small_jtag_test/idcode_test2.svf b/small_jtag_test/idcode_test2.svf
new file mode 100644
index 0000000..a7545e0
--- /dev/null
+++ b/small_jtag_test/idcode_test2.svf
@@ -0,0 +1,46 @@
+STATE RESET IDLE;
+TIR 0 ;
+HIR 5 TDI (1f) SMASK (1f) ;
+//HDR 1 TDI (00) SMASK (01) ;
+TDR 0 ;
+//Loading device with 'idcode' instruction.
+SIR 4 TDI (1) SMASK (f) ;
+//SDR 32 TDI (00000000) SMASK (ffffffff) TDO (00000c7f) SMASK (ffffffff) ;
+SDR 32 TDI (00000000) SMASK (ffffffff) TDO (000018ff) MASK (ffffffff) ;
+//
+
+// set to DMI "address"
+SIR 4 TDI (8) SMASK (f) ;
+// set DMI "ctrl" address (0)
+SDR 8 TDI (0) SMASK (ff) ;
+// set to DMI "data read"
+SIR 4 TDI (9) SMASK (f) ;
+// read 64 bit
+SDR 64 TDI (0000000000000000) SMASK (0000000000000000) TDO (0000000000000004) MASK (ffffffffffffffff) ;
+
+// set to DMI "address"
+SIR 4 TDI (8) SMASK (f) ;
+// set DMI "ctrl" address (0)
+SDR 8 TDI (0) SMASK (ff) ;
+// set to DMI "data write-read"
+SIR 4 TDI (a) SMASK (f) ;
+// write-read 64 bit
+SDR 64 TDI (0000000000000002) SMASK (ffffffffffffffff) TDO (0000000000000004) MASK (ffffffffffffffff) ;
+
+// set to DMI "address"
+SIR 4 TDI (8) SMASK (f) ;
+// set DMI "ctrl" address (0)
+SDR 8 TDI (0) SMASK (ff) ;
+// set to DMI "data read"
+SIR 4 TDI (9) SMASK (f) ;
+// read 64 bit
+SDR 64 TDI (0000000000000000) SMASK (0000000000000000) TDO (0000000000000002) MASK (ffffffffffffffff) ;
+
+// set to DMI "address"
+SIR 4 TDI (8) SMASK (f) ;
+// set DMI "MSR" address (3)
+SDR 8 TDI (3) SMASK (ff) ;
+// set to DMI "data read"
+SIR 4 TDI (9) SMASK (f) ;
+// read 64 bit
+SDR 64 TDI (0000000000000000) SMASK (0000000000000000) TDO (00000000deadbeef) MASK (ffffffffffffffff) ;
diff --git a/small_jtag_test/main.cpp b/small_jtag_test/main.cpp
index 73dd45b..d98ae9a 100644
--- a/small_jtag_test/main.cpp
+++ b/small_jtag_test/main.cpp
@@ -158,7 +158,7 @@ int main()
 {
     cxxrtl_design::p_add top;
 
-    bool prev_led = 0;
+    int sock = get_connection();
 
     top.step();
     for(int cycle=0;cycle<1000;++cycle){
diff --git a/small_jtag_test/openocd.cfg b/small_jtag_test/openocd.cfg
new file mode 100644
index 0000000..0f78aa0
--- /dev/null
+++ b/small_jtag_test/openocd.cfg
@@ -0,0 +1,15 @@
+
+interface remote_bitbang
+remote_bitbang_port 5000
+remote_bitbang_host localhost
+
+# this should be irlen=4
+jtag newtap libresoc tap -irlen 4 -irmask 0xf -ircapture 0xf -expected-id 0x000018ff
+
+#set _TARGETNAME libresoc.tap
+#target create $_TARGETNAME.0 ppc64 -chain-position $_TARGETNAME -rtos hwthread
+
+# Configure work area in on-chip SRAM
+#$_TARGETNAME.0 configure -work-area-phys 0x80000000 \
+#               -work-area-size 1000 -work-area-backup 0
+
diff --git a/small_jtag_test/openocd_test.sh b/small_jtag_test/openocd_test.sh
new file mode 100755
index 0000000..dcad497
--- /dev/null
+++ b/small_jtag_test/openocd_test.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+# run make followed by ./tb then run this script.
+
+openocd -f openocd.cfg -c init \
+                                   -c 'svf idcode.svf' \
+                                  -c shutdown