-proc ocd_process_reset { MODE } {
-
- # 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";
- }
-
- foreach t [ target names ] {
- # For compatiblity with 'old scripts'
- $t invoke-event old-pre_reset
-
- # New event script.
- $t invoke-event reset-start
- }
-
- # Init the tap controller.
- jtag arp_init-reset
-
- # Examine all targets.
- foreach t [ target names ] {
- $t arp_examine
- }
-
- # Let the C code know we are asserting reset.
- foreach t [ target names ] {
- $t invoke-event reset-assert-pre
- # C code needs to know if we expect to 'halt'
- $t arp_reset assert $halt
- $t invoke-event reset-assert-post
- }
-
- # Now de-assert reset.
- foreach t [ target names ] {
- $t invoke-event reset-deassert-pre
- # Again, de-assert code needs to know..
- $t arp_reset deassert $halt
- $t invoke-event reset-deassert-post
- }
-
-
- # Pass 1 - Now try to halt.
- if { $halt } {
- foreach t [target names] {
-
- # 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 $MODE] } {
- foreach t [target names] {
- set err [catch "$t arp_waitstate halted 5000"]
- # Did it halt?
- if { $err == 0 } {
- $t invoke-event old-post_reset
- $t invoke-event reset-init
- }
- }
- }
-
- foreach t [ target names ] {
- $t invoke-event reset-end
- }