# HG changeset patch
# User Space Falcon <falcon@ivan.Harhan.ORG>
# Date 1433577156 0
# Node ID 8604a725d883e52b83c6938c66822beb90a2af03
# Parent  73e647918297bace885a007c0209703c34362523
bootloader-disable.patch implemented

diff -r 73e647918297 -r 8604a725d883 patches/Makefile
--- a/patches/Makefile	Sat Jun 06 05:57:32 2015 +0000
+++ b/patches/Makefile	Sat Jun 06 07:52:36 2015 +0000
@@ -1,6 +1,9 @@
 NEWLIBS=tpudrv-quadband.lib
 TOOL=	../tool/ti-libpatch
 
+bootloader-disable.lib:	../libs/bootloader.lib bootloader-disable.patch
+	${TOOL} ../libs/bootloader.lib bootloader-disable.patch $@
+
 main-fchw.lib:	../libs/main.lib main-fchw.patch
 	${TOOL} ../libs/main.lib main-fchw.patch $@
 
diff -r 73e647918297 -r 8604a725d883 patches/bootloader-disable.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/patches/bootloader-disable.patch	Sat Jun 06 07:52:36 2015 +0000
@@ -0,0 +1,19 @@
+# TI's TCS211 firmware includes a component called "bootloader" which executes
+# before the main fw and seems to provide a mechanism for interrupting and
+# diverting the regular boot process by sending some magic into one of the
+# UARTs, replicating the equivalent functionality provided by the Calypso boot
+# ROM.  However, we never got the source for this part, only a binary object
+# library, so it is not immediately apparent exactly what this bootloader does,
+# what the communication protocol is and so forth - and I (Space Falcon) don't
+# feel like reverse-engineering this piece as the needed functionality is
+# provided much more usefully (unbrickable!) by the boot ROM in the chip.
+#
+# If one does not wish to run code for which we have no source and which we
+# therefore don't really understand, the present patch disables the TCS211
+# bootloader by smacking a "bx lr" Thumb instruction at the
+# $sta_select_application entry point to the code for which we have no source.
+
+[start.obj]
+
+.text 16a 70
+.text 16b 47