+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
-
- irscan $jrc 0x3F -endstate RUN/IDLE
- runtest 10
+# set the taps to be enabled by default. this can be overridden
+# by setting DEFAULT_TAPS in a separate configuration file
+# or directly on the command line.
+if { [info exists DEFAULT_TAPS] } {
+ set _DEFAULT_TAPS "$DEFAULT_TAPS"
+} else {
+ set _DEFAULT_TAPS "$_CHIPNAME.tap"
}
#
-# M3 DAP
+# Main DAP
#
-if { [info exists M3_DAP_TAPID] } {
- set _M3_DAP_TAPID $M3_DAP_TAPID
+if { [info exists DAP_TAPID] } {
+ set _DAP_TAPID $DAP_TAPID
} else {
- set _M3_DAP_TAPID 0x4b6b902f
+ set _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 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
#
-# Main DAP
+# M3 DAP
#
-if { [info exists DAP_TAPID] } {
- set _DAP_TAPID $DAP_TAPID
+if { [info exists M3_DAP_TAPID] } {
+ set _M3_DAP_TAPID $M3_DAP_TAPID
} else {
- set _DAP_TAPID 0x4b6b902f
+ set _M3_DAP_TAPID 0x4b6b902f
}
-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 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
#
# ICEpick-D (JTAG route controller)
#
if { [info exists JRC_TAPID] } {
- set _JRC_TAPID $JRC_TAPID
+ set _JRC_TAPID $JRC_TAPID
} else {
- set _JRC_TAPID 0x0b94402f
+ 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"
#
-# Cortex A8 target
+# 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 -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 }