riscv-openocd/tcl/target/am335x.cfg

source [find target/icepick.cfg]

if { [info exists CHIPNAME] } {
	set _CHIPNAME $CHIPNAME
} else {
	set _CHIPNAME am335x
}

# 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.dap"
}

#
# Main DAP
#
if { [info exists DAP_TAPID] } {
	set _DAP_TAPID $DAP_TAPID
} else {
	set _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 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)
#
if { [info exists JRC_TAPID] } {
	set _JRC_TAPID $JRC_TAPID
} else {
	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 {
	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
#
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_a -chain-position $_CHIPNAME.dap -dbgbase 0x80001000

# SRAM: 64K at 0x4030.0000; use the first 16K
$_TARGETNAME configure -work-area-phys 0x40300000 -work-area-size 0x4000