flash_openocd.cfg

#/****************************************************************************
# *
# *   Copyright (C) 2023 bsvtgc@gmail.com. All rights reserved.
# *   Author: Vincent <bsvtgc@gmail.com>
# *
# ****************************************************************************/

# WORK IN PROGRESS script

#As shipped, the OTP memory at the boot location is preprogrammed to
#jump immediately to the end of the OTP memory, which contains the
#following code to jump to the beginning of the SPI-Flash at 0x2000 0000:

#fence 0,0
#li t0, 0x20000000
#jr t0

# ----------------------------------------------------#
# CONFIGURATION STAGE
# ----------------------------------------------------#

  echo "----------------------WARNING-----------------------------"
  echo "THIS SCRIPT WOULD OVERWRITE FROM ADDR 0x2000_0000 IN FLASH"

  adapter speed 4000

  adapter driver jlink
  transport select jtag

  set _CHIPNAME riscv
  jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id 0x20000913

  set _TARGETNAME $_CHIPNAME.cpu
  target create $_TARGETNAME.0 riscv -chain-position $_TARGETNAME

  # set work area in RAM 0x8000_0000 with size 0x4000
  $_TARGETNAME.0 configure -work-area-phys 0x80000000 -work-area-size 0x4000 -work-area-backup 0

  # No virtual to mem conversion
  riscv set_enable_virt2phys off
  riscv set_enable_virtual off

  # flash bank name driver base size chip_width bus_width target [driver_options]
  flash bank spi0 fespi 0x20000000 0 0 0 riscv.cpu.0 0x10014000

# ----------------------------------------------------#
# RUN STAGE
# ----------------------------------------------------#
init

# set JTAG command version 3 to be used
jlink jtag 3

halt 100

# flash erase sector num first last
echo [flash erase_sector 0 0 1]

riscv.cpu.0 mem2array buf 8 0x20000000 0x1000

foreach idx [array names buf] {
  if {$buf($idx) != 0xff} {
    echo "FLASH not erased"
  }
}

halt