cortex_m: Do additional initialization during reset

SAM4L requires additional steps to be taken right after SYSRESETREQ is
issued in order to function robustly:

       - CMSIS-DAP DAP driver needs to explicitly check for sticky bit
         errors since it is possible for adapter to perform successful
         write opration, report no errors and then, under the hood, do
         some other things that will result in sticky bit being set.

       - Debugger needs to wait for security system to finish
         intialization and assert CDBGPWRUPACK before proceeding

This change is related to commit http://openocd.zylin.com/#/c/1995/

Change-Id: I741c95a809bfd60d930cec9482239e4796a62326
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-on: http://openocd.zylin.com/2088
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-by: Andrey Yurovsky <yurovsky@gmail.com>

This commit is contained in:

Andrey Smirnov

2014-04-03 14:59:44 -07:00

committed by

Andreas Fritiofson

parent d6fd5d0f9b

commit ccf4d6d648

3 changed files with 43 additions and 6 deletions

									
										tcl/target/at91sam4lXX.cfg
									
		-4
	
												View File
												
				@@ -5,7 +5,3 @@ source [find target/at91sam4XXX.cfg]

				set _FLASHNAME $_CHIPNAME.flash

				flash bank $_FLASHNAME at91sam4l 0x00000000 0 1 1 $_TARGETNAME

				# if srst is not fitted use VECTRESET to perform a soft reset

				# this will only reset the core, not the peripherals

				cortex_m reset_config vectreset