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git://git.code.sf.net/p/openocd/code
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0b6f53e94c
Integrate a rescue mode inspired by [1]. The current OpenOCD must be restarted before normal work with the RP2040 because the rescue debug port must not be activated (or the target is reset every 'dap init'). To continue without restarting OpenOCD we would need to switch off the configured rescue dap. Change-Id: Ia05b960f06747063550c166e461939d92e232830 Link: [1] https://github.com/raspberrypi/openocd/blob/rp2040/tcl/target/rp2040-rescue.cfg Signed-off-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-on: https://review.openocd.org/c/openocd/+/7327 Reviewed-by: Jonathan Bell <jonathan@raspberrypi.com> Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com> Tested-by: jenkins
111 lines
3.3 KiB
INI
111 lines
3.3 KiB
INI
# SPDX-License-Identifier: GPL-2.0-or-later
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# RP2040 is a microcontroller with dual Cortex-M0+ core.
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# https://www.raspberrypi.com/documentation/microcontrollers/rp2040.html
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# The device requires multidrop SWD for debug.
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transport select swd
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source [find target/swj-dp.tcl]
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if { [info exists CHIPNAME] } {
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set _CHIPNAME $CHIPNAME
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} else {
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set _CHIPNAME rp2040
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}
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if { [info exists WORKAREASIZE] } {
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set _WORKAREASIZE $WORKAREASIZE
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} else {
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set _WORKAREASIZE 0x10000
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}
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if { [info exists CPUTAPID] } {
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set _CPUTAPID $CPUTAPID
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} else {
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set _CPUTAPID 0x01002927
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}
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# Set to '1' to start rescue mode
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if { [info exists RESCUE] } {
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set _RESCUE $RESCUE
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} else {
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set _RESCUE 0
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}
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# Set to '0' or '1' for single core configuration, 'SMP' for -rtos hwthread
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# handling of both cores, anything else for isolated debugging of both cores
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if { [info exists USE_CORE] } {
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set _USE_CORE $USE_CORE
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} else {
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set _USE_CORE SMP
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}
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set _BOTH_CORES [expr { $_USE_CORE != 0 && $_USE_CORE != 1 }]
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swj_newdap $_CHIPNAME cpu -expected-id $_CPUTAPID
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# The rescue debug port uses the DP CTRL/STAT bit DBGPWRUPREQ to reset the
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# PSM (power on state machine) of the RP2040 with a flag set in the
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# VREG_AND_POR_CHIP_RESET register. Once the reset is released
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# (by clearing the DBGPWRUPREQ flag), the bootrom will run, see this flag,
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# and halt. Allowing the user to load some fresh code, rather than loading
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# the potentially broken code stored in flash
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if { $_RESCUE } {
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dap create $_CHIPNAME.rescue_dap -chain-position $_CHIPNAME.cpu -dp-id $_CPUTAPID -instance-id 0xf -ignore-syspwrupack
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init
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# Clear DBGPWRUPREQ
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$_CHIPNAME.rescue_dap dpreg 0x4 0x00000000
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# Verifying CTRL/STAT is 0
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set _CTRLSTAT [$_CHIPNAME.rescue_dap dpreg 0x4]
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if {[expr {$_CTRLSTAT & 0xf0000000}]} {
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echo "Rescue failed, DP CTRL/STAT readback $_CTRLSTAT"
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} else {
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echo "Now restart OpenOCD without RESCUE flag and load code to RP2040"
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}
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shutdown
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}
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# core 0
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if { $_USE_CORE != 1 } {
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dap create $_CHIPNAME.dap0 -chain-position $_CHIPNAME.cpu -dp-id $_CPUTAPID -instance-id 0
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set _TARGETNAME_0 $_CHIPNAME.core0
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target create $_TARGETNAME_0 cortex_m -dap $_CHIPNAME.dap0 -coreid 0
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# srst does not exist; use SYSRESETREQ to perform a soft reset
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$_TARGETNAME_0 cortex_m reset_config sysresetreq
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}
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# core 1
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if { $_USE_CORE != 0 } {
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dap create $_CHIPNAME.dap1 -chain-position $_CHIPNAME.cpu -dp-id $_CPUTAPID -instance-id 1
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set _TARGETNAME_1 $_CHIPNAME.core1
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target create $_TARGETNAME_1 cortex_m -dap $_CHIPNAME.dap1 -coreid 1
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$_TARGETNAME_1 cortex_m reset_config sysresetreq
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}
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if {[string compare $_USE_CORE SMP] == 0} {
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$_TARGETNAME_0 configure -rtos hwthread
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$_TARGETNAME_1 configure -rtos hwthread
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target smp $_TARGETNAME_0 $_TARGETNAME_1
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}
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if { $_USE_CORE == 1 } {
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set _FLASH_TARGET $_TARGETNAME_1
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} else {
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set _FLASH_TARGET $_TARGETNAME_0
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}
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# Backup the work area. The flash probe runs an algorithm on the target CPU.
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# The flash is probed during gdb connect if gdb_memory_map is enabled (by default).
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$_FLASH_TARGET configure -work-area-phys 0x20010000 -work-area-size $_WORKAREASIZE -work-area-backup 1
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set _FLASHNAME $_CHIPNAME.flash
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flash bank $_FLASHNAME rp2040_flash 0x10000000 0 0 0 $_FLASH_TARGET
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if { $_BOTH_CORES } {
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# Alias to ensure gdb connecting to core 1 gets the correct memory map
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flash bank $_CHIPNAME.alias virtual 0x10000000 0 0 0 $_TARGETNAME_1 $_FLASHNAME
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# Select core 0
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targets $_TARGETNAME_0
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}
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