+# SPDX-License-Identifier: GPL-2.0-or-later
+
#
-# Texas Instruments DaVinci family: TMS320DM365
+# Texas Instruments DaVinci family: TMS320DM365
#
if { [info exists CHIPNAME] } {
- set _CHIPNAME $CHIPNAME
+ set _CHIPNAME $CHIPNAME
} else {
- set _CHIPNAME dm365
+ set _CHIPNAME dm365
}
-#
-# For now, expect EMU0/EMU1 jumpered LOW (not TI's default) so ARM and ETB
-# are enabled without making ICEpick route ARM and ETB into the JTAG chain.
-#
-# Also note: when running without RTCK before the PLLs are set up, you
-# may need to slow the JTAG clock down quite a lot (under 2 MHz).
-#
+# TI boards default to EMU0/EMU1 *high* -- ARM and ETB are *disabled*
+# after JTAG reset until ICEpick is used to route them in.
+set EMU01 "-disable"
+
+# With EMU0/EMU1 jumpered *low* ARM and ETB are *enabled* without
+# needing any ICEpick interaction.
+#set EMU01 "-enable"
+
source [find target/icepick.cfg]
-set EMU01 "-enable"
-#set EMU01 "-disable"
# Subsidiary TAP: ARM ETB11, with scan chain for 4K of ETM trace buffer
-if { [info exists ETB_TAPID ] } {
+if { [info exists ETB_TAPID] } {
set _ETB_TAPID $ETB_TAPID
} else {
set _ETB_TAPID 0x2b900f0f
}
-jtag newtap $_CHIPNAME etb -irlen 4 -ircapture 0x1 -irmask 0xf \
- -expected-id $_ETB_TAPID $EMU01
+jtag newtap $_CHIPNAME etb -irlen 4 -irmask 0xf -expected-id $_ETB_TAPID $EMU01
jtag configure $_CHIPNAME.etb -event tap-enable \
"icepick_c_tapenable $_CHIPNAME.jrc 1"
# Subsidiary TAP: ARM926ejs with scan chains for ARM Debug, EmbeddedICE-RT, ETM.
-if { [info exists CPU_TAPID ] } {
+if { [info exists CPU_TAPID] } {
set _CPU_TAPID $CPU_TAPID
} else {
set _CPU_TAPID 0x0792602f
}
-jtag newtap $_CHIPNAME arm -irlen 4 -ircapture 0x1 -irmask 0xf \
- -expected-id $_CPU_TAPID $EMU01
+jtag newtap $_CHIPNAME arm -irlen 4 -irmask 0xf -expected-id $_CPU_TAPID $EMU01
jtag configure $_CHIPNAME.arm -event tap-enable \
"icepick_c_tapenable $_CHIPNAME.jrc 0"
# Primary TAP: ICEpick (JTAG route controller) and boundary scan
-if { [info exists JRC_TAPID ] } {
+if { [info exists JRC_TAPID] } {
set _JRC_TAPID $JRC_TAPID
} else {
set _JRC_TAPID 0x0b83e02f
}
-jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f \
- -expected-id $_JRC_TAPID
+jtag newtap $_CHIPNAME jrc -irlen 6 -irmask 0x3f -expected-id $_JRC_TAPID
+
+jtag configure $_CHIPNAME.jrc -event setup \
+ "jtag tapenable $_CHIPNAME.etb; jtag tapenable $_CHIPNAME.arm"
################
source [find target/davinci.cfg]
################
-# GDB target: the ARM, using SRAM1 for scratch. SRAM0 (also 16K)
+# GDB target: the ARM, using SRAM1 for scratch. SRAM0 (also 16K)
# and the ETB memory (4K) are other options, while trace is unused.
set _TARGETNAME $_CHIPNAME.arm
# NOTE that work-area-virt presumes a Linux 2.6.30-rc2+ kernel,
# and that the work area is used only with a kernel mmu context ...
$_TARGETNAME configure \
- -work-area-virt [expr 0xfffe0000 + 0x4000] \
+ -work-area-virt [expr {0xfffe0000 + 0x4000}] \
-work-area-phys [dict get $dm365 sram1] \
-work-area-size 0x4000 \
-work-area-backup 0
+# be absolutely certain the JTAG clock will work with the worst-case
+# CLKIN = 19.2 MHz (best case: 36 MHz) even when no bootloader turns
+# on the PLL and starts using it. OK to speed up after clock setup.
+adapter speed 1500
+$_TARGETNAME configure -event "reset-start" { adapter speed 1500 }
+
arm7_9 fast_memory_access enable
arm7_9 dcc_downloads enable