# SPDX-License-Identifier: GPL-2.0-or-later

#Hilscher netX 500 CPU

if { [info exists CHIPNAME] } {
   set _CHIPNAME $CHIPNAME
} else {
   set _CHIPNAME netx500
}

if { [info exists ENDIAN] } {
   set _ENDIAN $ENDIAN
} else {
   set _ENDIAN little
}

if { [info exists CPUTAPID] } {
   set _CPUTAPID $CPUTAPID
} else {
   set _CPUTAPID 0x07926021
}

# jtag scan chain
jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID

# that TAP is associated with a target
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME arm926ejs -endian $_ENDIAN -chain-position $_TARGETNAME

proc mread32 {addr} {
  return [read_memory $addr 32 1]
}

# This function must be called on netX100/500 right after halt
# If it is called later the needed register cannot be written anymore
proc sdram_fix { } {

  set accesskey [mread32 0x00100070]
  mww 0x00100070 $accesskey
  mww 0x0010002c 0x00000001

  if {[expr {[mread32 0x0010002c] & 0x07}] == 0x07} {
	 puts "SDRAM Fix was not executed. Probably your CPU halted too late and the register is already locked!"
  } else {
	 puts "SDRAM Fix succeeded!"
  }
}