-#
-# Defines basic Tcl procs that must be there for
-# OpenOCD to work.
+# Defines basic Tcl procs that must exist for OpenOCD scripts to work.
#
# Embedded into OpenOCD executable
#
-
# Help text list. A list of command + help text pairs.
#
# Commands can be more than one word and they are stored
}
-# Show flash in human readable form
-# This is an example of a human readable form of a low level fn
-proc flash_banks {} {
- set i 0
- set result ""
- foreach {a} [ocd_flash_banks] {
- if {$i > 0} {
- set result "$result\n"
- }
- set result [format "$result#%d: %s at 0x%08x, size 0x%08x, buswidth %d, chipwidth %d" $i $a(name) $a(base) $a(size) $a(bus_width) $a(chip_width)]
- set i [expr $i+1]
- }
- return $result
-}
-
# We need to explicitly redirect this to the OpenOCD command
# as Tcl defines the exit proc
proc exit {} {
add_help_text script "<filename> - filename of OpenOCD script (tcl) to run"
-# Handle GDB 'R' packet. Can be overriden by configuration script,
-# but it's not something one would expect target scripts to do
-# normally
-proc ocd_gdb_restart {target_id} {
- # Fix!!! we're resetting all targets here! Really we should reset only
- # one target
- reset halt
-}
-
-#########
-
-# Temporary migration aid. May be removed starting in January 2011.
-proc armv4_5 params {
- echo "DEPRECATED! use 'arm $params' not 'armv4_5 $params'"
- arm $params
-}
-
-#########
-
-# This reset logic may be overridden by board/target/... scripts as needed
-# to provide a reset that, if possible, is close to a power-up reset.
-#
-# Exit requirements include: (a) JTAG must be working, (b) the scan
-# chain was validated with "jtag arp_init" (or equivalent), (c) nothing
-# stays in reset. No TAP-specific scans were performed. It's OK if
-# some targets haven't been reset yet; they may need TAP-specific scans.
-#
-# The "mode" values include: halt, init, run (from "reset" command);
-# startup (at OpenOCD server startup, when JTAG may not yet work); and
-# potentially more (for reset types like cold, warm, etc)
-proc init_reset { mode } {
- jtag arp_init-reset
-}
-
-
-global in_process_reset
-set in_process_reset 0
-
-# Catch reset recursion
-proc ocd_process_reset { MODE } {
- global in_process_reset
- if {$in_process_reset} {
- set in_process_reset 0
- return -code error "'reset' can not be invoked recursively"
- }
-
- set in_process_reset 1
- set success [expr [catch {ocd_process_reset_inner $MODE} result]==0]
- set in_process_reset 0
-
- if {$success} {
- return $result
- } else {
- return -code error $result
- }
-}
-
-proc ocd_process_reset_inner { MODE } {
- set targets [target names]
-
- # If this target must be halted...
- set halt -1
- if { 0 == [string compare $MODE halt] } {
- set halt 1
- }
- if { 0 == [string compare $MODE init] } {
- set halt 1;
- }
- if { 0 == [string compare $MODE run ] } {
- set halt 0;
- }
- if { $halt < 0 } {
- return -error "Invalid mode: $MODE, must be one of: halt, init, or run";
- }
-
- # Target event handlers *might* change which TAPs are enabled
- # or disabled, so we fire all of them. But don't issue any
- # target "arp_*" commands, which may issue JTAG transactions,
- # unless we know the underlying TAP is active.
- #
- # NOTE: ARP == "Advanced Reset Process" ... "advanced" is
- # relative to a previous restrictive scheme
-
- foreach t $targets {
- # New event script.
- $t invoke-event reset-start
- }
-
- # Use TRST or TMS/TCK operations to reset all the tap controllers.
- # TAP reset events get reported; they might enable some taps.
- init_reset $MODE
-
- # Examine all targets on enabled taps.
- foreach t $targets {
- if {[jtag tapisenabled [$t cget -chain-position]]} {
- $t arp_examine
- }
- }
-
- # Assert SRST, and report the pre/post events.
- # Note: no target sees SRST before "pre" or after "post".
- foreach t $targets {
- $t invoke-event reset-assert-pre
- }
- foreach t $targets {
- # C code needs to know if we expect to 'halt'
- if {[jtag tapisenabled [$t cget -chain-position]]} {
- $t arp_reset assert $halt
- }
- }
- foreach t $targets {
- $t invoke-event reset-assert-post
- }
-
- # Now de-assert SRST, and report the pre/post events.
- # Note: no target sees !SRST before "pre" or after "post".
- foreach t $targets {
- $t invoke-event reset-deassert-pre
- }
- foreach t $targets {
- # Again, de-assert code needs to know if we 'halt'
- if {[jtag tapisenabled [$t cget -chain-position]]} {
- $t arp_reset deassert $halt
- }
- }
- foreach t $targets {
- $t invoke-event reset-deassert-post
- }
-
- # Pass 1 - Now wait for any halt (requested as part of reset
- # assert/deassert) to happen. Ideally it takes effect without
- # first executing any instructions.
- if { $halt } {
- foreach t $targets {
- if {[jtag tapisenabled [$t cget -chain-position]] == 0} {
- continue
- }
-
- # Wait upto 1 second for target to halt. Why 1sec? Cause
- # the JTAG tap reset signal might be hooked to a slow
- # resistor/capacitor circuit - and it might take a while
- # to charge
-
- # Catch, but ignore any errors.
- catch { $t arp_waitstate halted 1000 }
-
- # Did we succeed?
- set s [$t curstate]
-
- if { 0 != [string compare $s "halted" ] } {
- return -error [format "TARGET: %s - Not halted" $t]
- }
- }
- }
-
- #Pass 2 - if needed "init"
- if { 0 == [string compare init $MODE] } {
- foreach t $targets {
- if {[jtag tapisenabled [$t cget -chain-position]] == 0} {
- continue
- }
-
- set err [catch "$t arp_waitstate halted 5000"]
- # Did it halt?
- if { $err == 0 } {
- $t invoke-event reset-init
- }
- }
- }
-
- foreach t $targets {
- $t invoke-event reset-end
- }
-}
-
-#########
-
-# REVISIT power_restore, power_dropout, srst_deasserted, srst_asserted
-# are currently neither documented nor supported except on ZY1000.
-
-proc power_restore {} {
- puts "Sensed power restore."
- reset init
-}
-
-add_help_text power_restore "Overridable procedure run when power restore is detected. Runs 'reset init' by default."
-
-proc power_dropout {} {
- puts "Sensed power dropout."
-}
-
-proc srst_deasserted {} {
- puts "Sensed nSRST deasserted."
- reset init
-}
-add_help_text srst_deasserted "Overridable procedure run when srst deassert is detected. Runs 'reset init' by default."
-
-proc srst_asserted {} {
- puts "Sensed nSRST asserted."
-}
-
#########
# catch any exceptions, capture output and return output
} result
return $result
}
-
-
-# Executed during "init". Can be overridden
-# by board/target/... scripts
-proc jtag_init {} {
- if {[catch {jtag arp_init} err]!=0} {
- # try resetting additionally
- init_reset startup
- }
-}
Code Review / openocd.git / blobdiff