tcl/target: add SPDX tag

[fw/openocd] / tcl / target / am335x.cfg

diff --git a/tcl/target/am335x.cfg b/tcl/target/am335x.cfg
index 9a24ef00e7b26a3bf1eb46f0c920bd5b7371c865..208ebf5610869b50e598e64c867349832ce213e6 100644 (file)
--- a/tcl/target/am335x.cfg
+++ b/tcl/target/am335x.cfg
@@ -1,29 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+source [find target/icepick.cfg]
 
 if { [info exists CHIPNAME] } {
-   set _CHIPNAME $CHIPNAME
+       set _CHIPNAME $CHIPNAME
 } else {
-   set _CHIPNAME am335x
+       set _CHIPNAME am335x
 }
 
-# This chip contains an IcePick-D JTAG router.  The IcePick-C configuration is almost
-# compatible, but it doesn't work.  For now, we will just embed the IcePick-D
-# routines here.
-proc icepick_d_tapenable {jrc port} {
-       # select router
-       irscan $jrc 7 -endstate IRPAUSE
-       drscan $jrc 8 0x89 -endstate DRPAUSE
-
-       # set ip control
-       irscan $jrc 2 -endstate IRPAUSE
-       drscan $jrc 32 [expr 0xa0002108 + ($port << 24)] -endstate DRPAUSE
-
-       # for icepick_D
-       irscan $jrc 2 -endstate IRPAUSE
-       drscan $jrc 32 0xe0002008 -endstate DRPAUSE
+# set the taps to be enabled by default. this can be overridden
+# by setting DEFAULT_TAPS in a separate configuration file
+# or directly on the command line.
+if { [info exists DEFAULT_TAPS] } {
+       set _DEFAULT_TAPS "$DEFAULT_TAPS"
+} else {
+       set _DEFAULT_TAPS "$_CHIPNAME.tap"
+}
 
-       irscan $jrc 0x3F -endstate RUN/IDLE
-       runtest 10
+#
+# Main DAP
+#
+if { [info exists DAP_TAPID] } {
+       set _DAP_TAPID $DAP_TAPID
+} else {
+       set _DAP_TAPID 0x4b6b902f
 }
+jtag newtap $_CHIPNAME tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID -disable
+jtag configure $_CHIPNAME.tap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 12 0"
+dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.tap
 
 #
 # M3 DAP
@@ -33,44 +37,78 @@ if { [info exists 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"
+jtag newtap $_CHIPNAME m3_tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_M3_DAP_TAPID -disable
+jtag configure $_CHIPNAME.m3_tap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 11 0"
+dap create $_CHIPNAME.m3_dap -chain-position $_CHIPNAME.m3_tap
 
 #
-# Main DAP
+# ICEpick-D (JTAG route controller)
 #
-if { [info exists DAP_TAPID ] } {
-   set _DAP_TAPID $DAP_TAPID
+if { [info exists JRC_TAPID] } {
+       set _JRC_TAPID $JRC_TAPID
 } else {
-   set _DAP_TAPID 0x4b6b902f
+       set _JRC_TAPID 0x0b94402f
 }
-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"
+jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f -expected-id $_JRC_TAPID -ignore-version
+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"
 
 #
-# ICEpick-D (JTAG route controller)
+# helper function that enables all taps passed as argument
 #
-if { [info exists JRC_TAPID ] } {
-   set _JRC_TAPID $JRC_TAPID
-} else {
-   set _JRC_TAPID 0x0b94402f
+proc enable_default_taps { taps } {
+       foreach tap $taps {
+               jtag tapenable $tap
+       }
 }
-jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f -expected-id $_JRC_TAPID
-jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap"
-# some TCK tycles are required to activate the DEBUG power domain
-jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
 
 #
-# Cortex A8 target
+# Cortex-M3 target
+#
+set _TARGETNAME_2 $_CHIPNAME.m3
+target create $_TARGETNAME_2 cortex_m -dap $_CHIPNAME.m3_dap
+
+#
+# Cortex-A8 target
 #
 set _TARGETNAME $_CHIPNAME.cpu
-target create $_TARGETNAME cortex_a -chain-position $_CHIPNAME.dap -dbgbase 0x80001000
+target create $_TARGETNAME cortex_a -dap $_CHIPNAME.dap -dbgbase 0x80001000
 
 # SRAM: 64K at 0x4030.0000; use the first 16K
 $_TARGETNAME configure -work-area-phys 0x40300000 -work-area-size 0x4000
 
-$_TARGETNAME configure -event gdb-attach {
-   cortex_a dbginit
-   halt
-}
 
+# when putting the target into 'reset halt', we need to disable the watchdog as
+# it would otherwise trigger while we're in JTAG
+# FIXME: unify with target/am437x.cfg
+source [find mem_helper.tcl]
+set  WDT1_BASE_ADDR                  0x44e35000
+set  WDT1_W_PEND_WSPR                [expr       {$WDT1_BASE_ADDR     +  0x0034}]
+set  WDT1_WSPR                       [expr       {$WDT1_BASE_ADDR     +  0x0048}]
+proc disable_watchdog { } {
+       global WDT1_WSPR
+       global WDT1_W_PEND_WSPR
+       global _TARGETNAME
+
+       set curstate [$_TARGETNAME curstate]
+
+       if { [string compare $curstate halted] == 0 } {
+               set WDT_DISABLE_SEQ1    0xaaaa
+               set WDT_DISABLE_SEQ2    0x5555
+
+               mww phys $WDT1_WSPR $WDT_DISABLE_SEQ1
+
+               # Empty body to make sure this executes as fast as possible.
+               # We don't want any delays here otherwise romcode might start
+               # executing and end up changing state of certain IPs.
+               while { [expr {[mrw $WDT1_W_PEND_WSPR] & 0x10}] } { }
+
+               mww phys $WDT1_WSPR $WDT_DISABLE_SEQ2
+               while { [expr {[mrw $WDT1_W_PEND_WSPR] & 0x10}] } { }
+       }
+}
+$_TARGETNAME configure -event reset-end { disable_watchdog }