config.cfg

# config file for generic FT232H based USB-serial adaptor
# TCK:  D0
# TDI:  D1
# TDO:  D2
# TMS:  D3
# TRST: D4
# SRST: D5

#interface ftdi
adapter driver ftdi
ftdi_vid_pid 0x0403 0x6014
ftdi_layout_init 0x0078 0x017b
#adapter_khz 1000
adapter speed 1000
ftdi_layout_signal nTRST -data 0x0010 -noe 0x0040
ftdi_layout_signal nSRST -data 0x0020 -noe 0x0040

# change this to 'transport select swd' if required
transport select jtag

# references
# http://sourceforge.net/p/openocd/mailman/message/31617382/
# http://www.baremetaldesign.com/index.php?section=hardware&hw=jtag

# we need to enable srst even though we don't connect it
reset_config trst_and_srst
jtag_ntrst_delay 500

if { [info exists CHIPNAME] } {
  set _CHIPNAME $CHIPNAME
} else {
  set _CHIPNAME rpi3
}

#
# Main DAP
#
if { [info exists DAP_TAPID] } {
   set _DAP_TAPID $DAP_TAPID
} else {
   set _DAP_TAPID 0x4ba00477
}

jtag newtap $_CHIPNAME tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID -enable
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.tap

set _TARGETNAME $_CHIPNAME.a53
set _CTINAME $_CHIPNAME.cti

set DBGBASE {0x80010000 0x80012000 0x80014000 0x80016000}
set CTIBASE {0x80018000 0x80019000 0x8001a000 0x8001b000}
set _cores 4

for { set _core 0 } { $_core < $_cores } { incr _core } {

    cti create $_CTINAME.$_core -dap $_CHIPNAME.dap -ap-num 0 \
        -ctibase [lindex $CTIBASE $_core]

    target create $_TARGETNAME.$_core aarch64 \
        -dap $_CHIPNAME.dap -coreid $_core \
        -dbgbase [lindex $DBGBASE $_core] -cti $_CTINAME.$_core

    $_TARGETNAME.$_core configure -event reset-assert-post "aarch64 dbginit"
    $_TARGETNAME.$_core configure -event gdb-attach { halt }
}