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AM335x: allow simultaneous debugging of A8 and M3 cores 

This patch fixes the tap order so that it matches the actual jtag
chain when all taps are enabled. It also introduces a variable
DEFAULT_TAPS that can be set outside of this script, e.g. on the
command line, to specify which taps are to be enabled on init.
Lastly, a new debug target "am335x.m3" is added so that the Wakeup-M3
can be selected for debugging.

Change-Id: Iccf177fda8d5e3737b1b2bb8fd1eaa7d3262ed9f
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3013
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
This commit is contained in:
Matthias Welwarsky 2015-10-13 12:02:58 +02:00 committed by Andreas Fritiofson
parent b8be5de75d
commit 0627bc3b43
1 changed files with 43 additions and 16 deletions
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45
tcl/target/am335x.cfg
View File

@ -6,16 +6,14 @@ if { [info exists CHIPNAME] } {
set _CHIPNAME am335x
}
#
# M3 DAP
#
if { [info exists M3_DAP_TAPID] } {
set _M3_DAP_TAPID $M3_DAP_TAPID
# set the taps to be enabled by default. this can be overridden
# by setting DEFAULT_TAPS in a separate configuration file
# or directly on the command line.
if { [info exists DEFAULT_TAPS] } {
set _DEFAULT_TAPS "$DEFAULT_TAPS"
} else {
set _M3_DAP_TAPID 0x4b6b902f
set _DEFAULT_TAPS "$_CHIPNAME.dap"
}
jtag newtap $_CHIPNAME m3_dap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_M3_DAP_TAPID -disable
jtag configure $_CHIPNAME.m3_dap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 11 0"
#
# Main DAP
@ -28,6 +26,17 @@ if { [info exists DAP_TAPID] } {
jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID -disable
jtag configure $_CHIPNAME.dap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 12 0"
#
# M3 DAP
#
if { [info exists M3_DAP_TAPID] } {
set _M3_DAP_TAPID $M3_DAP_TAPID
} else {
set _M3_DAP_TAPID 0x4b6b902f
}
jtag newtap $_CHIPNAME m3_dap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_M3_DAP_TAPID -disable
jtag configure $_CHIPNAME.m3_dap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 11 0"
#
# ICEpick-D (JTAG route controller)
#
@ -37,10 +46,28 @@ if { [info exists JRC_TAPID] } {
set _JRC_TAPID 0x0b94402f
}
jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f -expected-id $_JRC_TAPID -ignore-version
jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap"
jtag configure $_CHIPNAME.jrc -event setup {
global _DEFAULT_TAPS
enable_default_taps $_DEFAULT_TAPS
}
# some TCK tycles are required to activate the DEBUG power domain
jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
#
# helper function that enables all taps passed as argument
#
proc enable_default_taps { taps } {
foreach tap $taps {
jtag tapenable $tap
}
}
#
# Cortex M3 target
#
set _TARGETNAME_2 $_CHIPNAME.m3
target create $_TARGETNAME_2 cortex_m -chain-position $_CHIPNAME.m3_dap
#
# Cortex A8 target
#