add-openocd-script.patch

This is the script for gta03 load by openocd.  We use the single qi
image for all purposes now so U-Boot lowlevel_foo style crap is dead.

We have to run the first part of init before copying qi image to
TEXT_BASE (0x33000000) because DRAM is not functional until then.

Fixed branchthrough at 0x8 is used as a place to hang the breakpoint.

Signed-off-by: Andy Green <andy@openmoko.com>

qiboot/gta03-qi.ocd

@@ -0,0 +1,33 @@
+# gta03 Qi script
+# Andy Green <andy@openmoko.com>
+
+reset halt
+wait_halt
+
+# bring the steppingstone part of qi image into steppingstone
+#
+load_binary /projects/openmoko/bootloader/image/qi 0x0
+#
+# mark ourselves as JTAG load
+#
+mww 0x4 0xffffffff
+
+#
+# we have to run that so SDRAM exists in a usable way
+# fixed jumpthrough at 0x8 is executed after steppingstone
+# init (including RAM) has completed
+#
+bp 0x8 4 hw
+resume 0x0
+wait_halt
+rbp 0x8
+
+#
+# now prep the SDRAM
+#
+load_binary /projects/openmoko/bootloader/image/qi 0x33000000
+#
+# and continue...
+resume 0x8
+#
+

qiboot/src/start.S

@@ -28,6 +28,17 @@ _start:	b       start_code
 _is_jtag:
 	.word	0
 
+/* it's at a fixed address (+0x8) so we can breakpoint it in the JTAG script
+ * we need to go through this hassle because before this moment, SDRAM is not
+ * working so we can't prep it from JTAG
+ */
+
+_steppingstone_done:
+	ldr	pc, _start_armboot
+
+_start_armboot:
+	.word 	start_qi
+
 _TEXT_BASE:
 	.word	TEXT_BASE
 
@@ -192,10 +203,7 @@ clbss_l:
 
 /* we are going to jump into the C part of the init now */
 spin:
-	ldr	pc, _start_armboot
+	b	_steppingstone_done
-
-_start_armboot:	
-	.word 	start_qi
 
 /*
  *************************************************************************