openocd for rk3368

openocd-rk3368.cfg

source [find interface/jlink.cfg]

transport select swd
adapter speed 4000
reset_config none

gdb_target_description enable

source [find target/rk3368.cfg]


# reset_config trst_only

rk3368.c

static int
 swd_init(void) {
   struct rk3368_grf *grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
   struct rk3368_cru *cru = rockchip_get_cru();
   rk_setreg(&grf->soc_con15, 1 << 13);
   rk_clrsetreg(&grf->gpio2a_iomux, 1 << 14, 2 << 14);
   rk_clrsetreg(&grf->gpio2b_iomux, 1, 2);
}

rk3368.cfg

# scripts/target/rk3368.cfg
# Rockchip RK3368 Target
source [find target/swj-dp.tcl]

if { [info exists CHIPNAME] } {
  set _CHIPNAME $CHIPNAME
} else {
  set _CHIPNAME rk3368
}

#
# Main DAP
#
if { [info exists DAP_TAPID] } {
   set _DAP_TAPID $DAP_TAPID
} else {
   set _DAP_TAPID 0x5ba02477
}

# declare the one SWD tap to access the DAP
swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID

# create the DAP
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu -ignore-syspwrupack

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

set DBGBASE {0xffc30000 0xffc32000 0xffc34000 0xffc36000 0xffc50000 0xffc52000 0xffc54000 0xffc56000}
set CTIBASE {0xffc38000 0xffc39000 0xffc3a000 0xffc3b000 0xffc58000 0xffc59000 0xffc5a000 0xffc5b000}

set _cores 8

set _smp_command ""

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

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

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

    if { $_core != 0 } {
        set _command "$_command -defer-examine"
        set _smp_command "$_smp_command ${_TARGETNAME}.$_core"
    } else {
        set _smp_command "target smp ${_TARGETNAME}.$_core"
    }

    eval $_command
    $_TARGETNAME.$_core configure -event reset-assert-post "aarch64 dbginit"
}

eval $_smp_command

cti create cti.sys -dap $_CHIPNAME.dap -ap-num 0 -ctibase 0xffc38000

targets $_TARGETNAME.0