From 87aa1e7345dc4fc1d344f551711052a2f50a8022 Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Tue, 6 Sep 2011 11:37:01 -0300
Subject: [PATCH] m1/jtag-boot/: quick hack to boot an M1 with the "regular"
 bitstream (from NOR)

---
 m1/jtag-boot/Makefile  |  10 ++++++++++
 m1/jtag-boot/boot.bit  | Bin 0 -> 34 bytes
 m1/jtag-boot/boot.jtag |   5 +++++
 m1/jtag-boot/mkboot    |  28 ++++++++++++++++++++++++++++
 4 files changed, 43 insertions(+)
 create mode 100644 m1/jtag-boot/Makefile
 create mode 100644 m1/jtag-boot/boot.bit
 create mode 100644 m1/jtag-boot/boot.jtag
 create mode 100755 m1/jtag-boot/mkboot

diff --git a/m1/jtag-boot/Makefile b/m1/jtag-boot/Makefile
new file mode 100644
index 0000000..e50e5d3
--- /dev/null
+++ b/m1/jtag-boot/Makefile
@@ -0,0 +1,10 @@
+.PHONY:		boot clean
+
+boot:		boot.jtag boot.bit
+		jtag boot.jtag
+
+boot.bit:	mkboot
+		./mkboot >$@ || { rm -rf $@; exit 1; }
+
+clean:
+		rm -f boot.bit
diff --git a/m1/jtag-boot/boot.bit b/m1/jtag-boot/boot.bit
new file mode 100644
index 0000000000000000000000000000000000000000..06c53ad4a07137625e89c3cffa5f5253b0bc5fee
GIT binary patch
literal 34
lcmZSJ<o^JH3=E8^3=9kct7e9#86`3>7&S7O8!Tkt0|2K_2-W}q

literal 0
HcmV?d00001

diff --git a/m1/jtag-boot/boot.jtag b/m1/jtag-boot/boot.jtag
new file mode 100644
index 0000000..06295ae
--- /dev/null
+++ b/m1/jtag-boot/boot.jtag
@@ -0,0 +1,5 @@
+cable milkymist
+detect
+instruction CFG_OUT 000100 BYPASS
+instruction CFG_IN 000101 BYPASS
+pld load boot.bit
diff --git a/m1/jtag-boot/mkboot b/m1/jtag-boot/mkboot
new file mode 100755
index 0000000..b3d624f
--- /dev/null
+++ b/m1/jtag-boot/mkboot
@@ -0,0 +1,28 @@
+#!/usr/bin/perl
+#
+# mkboot - generate a bitstream (in .bit format) that boots an M1
+#          with the "regular" bitstream, using UrJTAG
+#
+# Hacked 2001 by Werner Almesberger
+#
+
+# magic, copied from xilinx_bitstream.c:xlx_bitstream_load_bit
+print pack("C*",
+    0x00, 0x09, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0,
+    0x0f, 0xf0, 0x00, 0x00, 0x01);
+
+@seq = (
+#    0xffff,	# DUMMY
+    0xaa99, 	# Sync(1)
+    0x5566,	# Sync(2)
+    0x3261,	# write GENERAL1
+    0x0000,	# start address 15:0
+    0x3281,	# write GENERAL2
+    0x0037,	# start address 23:16
+    0x30a1,	# write CMD
+    0x000e);	# IPROG
+#    0x2000);	# NOP
+
+print pack("aN", "e", 2*@seq);
+
+print pack("n*", @seq);