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# Copyright 2022 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
source [find mem_helper.tcl]
set _ENDIAN little
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME NPCX99nF
}
if { [info exists WORKAREAADDR] } {
set _WORKAREAADDR $WORKAREAADDR
} else {
set _WORKAREAADDR 0
}
if { [info exists WORKAREASIZE] } {
set _WORKAREASIZE $WORKAREASIZE
} else {
set _WORKAREASIZE 0
}
if { [info exists CPUTAPID ] } {
set _CPUTAPID $CPUTAPID
} else {
set _CPUTAPID 0x2ba01477
}
if { [info exists FLASHADDR] } {
set _FLASHADDR $FLASHADDR
} else {
set _FLASHADDR 0x64000000
}
adapter speed 600
swd newdap $_CHIPNAME cpu -enable
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
# Work area in RAM used during flashing
$_TARGETNAME configure -work-area-phys $_WORKAREAADDR -work-area-size $_WORKAREASIZE -work-area-backup 0
# The npcx driver detects and autoconfigures various flash parameters
set _FLASHNAME $_CHIPNAME.internal_flash
flash bank $_FLASHNAME npcx $_FLASHADDR 0 0 0 $_TARGETNAME
# use sysresetreq to perform a system reset
cortex_m reset_config sysresetreq
adapter srst delay 100
# Freeze various clocks, counters and destructive reads
# Otherwise something like the watchdog time can interfere with debugging/flashing
proc debug_freeze { } {
mwb 0x400C3078 0x7F
}
proc handle_gdb_attach { } {
halt
debug_freeze
# Read the address of the reset handler from the vector table
# The bootloader runs first, but it's not a good place to halt
# as it sets up various things, including debug support
set RESET_HANDLER [mrw 0x10080004]
bp $RESET_HANDLER 2 hw
reset run
# Wait to hit the reset handler bp
wait_halt 250
# OpenOCD can get stuck in the reset handler
# removing the BP prevents that
rbp $RESET_HANDLER
}
proc handle_gdb_detach { } {
shutdown
}
proc flash_target { image verify } {
global _FLASHADDR
echo "Resetting and halting target..."
reset halt
echo "Flashing image..."
flash write_image erase $image $_FLASHADDR bin
if { $verify == 1} {
echo "Verifying image..."
flash verify_image $image $_FLASHADDR bin
}
echo "Resuming target..."
reset run
}
$_TARGETNAME configure -event halted debug_freeze
# GDB connection config
$_TARGETNAME configure -event gdb-attach handle_gdb_attach
$_TARGETNAME configure -event gdb-detach handle_gdb_detach
gdb_memory_map enable
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