src/jtag/startup.tcl

   1 # Defines basic Tcl procs for OpenOCD JTAG module
   2
   3 # Executed during "init". Can be overridden
   4 # by board/target/... scripts
   5 proc jtag_init {} {
   6         if {[catch {jtag arp_init} err]!=0} {
   7                 # try resetting additionally
   8                 init_reset startup
   9         }
  10 }
  11
  12 # This reset logic may be overridden by board/target/... scripts as needed
  13 # to provide a reset that, if possible, is close to a power-up reset.
  14 #
  15 # Exit requirements include:  (a) JTAG must be working, (b) the scan
  16 # chain was validated with "jtag arp_init" (or equivalent), (c) nothing
  17 # stays in reset.  No TAP-specific scans were performed.  It's OK if
  18 # some targets haven't been reset yet; they may need TAP-specific scans.
  19 #
  20 # The "mode" values include:  halt, init, run (from "reset" command);
  21 # startup (at OpenOCD server startup, when JTAG may not yet work); and
  22 # potentially more (for reset types like cold, warm, etc)
  23 proc init_reset { mode } {
  24         jtag arp_init-reset
  25 }
  26
  27 #########
  28
  29 # TODO: power_restore and power_dropout are currently neither
  30 # documented nor supported except on ZY1000.
  31
  32 proc power_restore {} {
  33         puts "Sensed power restore, running reset init and halting GDB."
  34         reset init
  35
  36         # Halt GDB so user can deal with a detected power restore.
  37         #
  38         # After GDB is halted, then output is no longer forwarded
  39         # to the GDB console.
  40         set targets [target names]
  41         foreach t $targets {
  42                 # New event script.
  43                 $t invoke-event arp_halt_gdb
  44         }
  45 }
  46
  47 add_help_text power_restore "Overridable procedure run when power restore is detected. Runs 'reset init' by default."
  48
  49 proc power_dropout {} {
  50         puts "Sensed power dropout."
  51 }
  52
  53 #########
  54
  55 # TODO: srst_deasserted and srst_asserted are currently neither
  56 # documented nor supported except on ZY1000.
  57
  58 proc srst_deasserted {} {
  59         puts "Sensed nSRST deasserted, running reset init and halting GDB."
  60         reset init
  61
  62         # Halt GDB so user can deal with a detected reset.
  63         #
  64         # After GDB is halted, then output is no longer forwarded
  65         # to the GDB console.
  66         set targets [target names]
  67         foreach t $targets {
  68                 # New event script.
  69                 $t invoke-event arp_halt_gdb
  70         }
  71 }
  72
  73 add_help_text srst_deasserted "Overridable procedure run when srst deassert is detected. Runs 'reset init' by default."
  74
  75 proc srst_asserted {} {
  76         puts "Sensed nSRST asserted."
  77 }