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# Quirks to bypass missing SRST on JTAG connector
# EVALSPEAr310 Rev. 2.0
# http://www.st.com/spear
#
# Date: 2010-08-17
# Author: Antonio Borneo <borneo.antonio@gmail.com>
# For boards that have JTAG SRST not connected.
# We use "arm9 vector_catch reset" to catch button reset event.
$_TARGETNAME configure -event reset-assert sp_reset_assert
$_TARGETNAME configure -event reset-deassert-post sp_reset_deassert_post
# keeps the name of the SPEAr target
global sp_target_name
set sp_target_name $_TARGETNAME
# Keeps the argument of "reset" command (run, init, halt).
global sp_reset_mode
set sp_reset_mode ""
# Helper procedure. Returns 0 is target is halted.
proc sp_is_halted {} {
global sp_target_name
return [expr [string compare [$sp_target_name curstate] "halted" ] == 0]
}
# wait for reset button to be pressed, causing CPU to get halted
proc sp_reset_deassert_post {} {
global sp_reset_mode
set bar(0) |
set bar(1) /
set bar(2) -
set bar(3) \\
poll on
puts "====> Press reset button on the board <===="
for {set i 0} { [sp_is_halted] == 0 } { set i [expr $i + 1]} {
puts -nonewline "$bar([expr $i & 3])\r"
sleep 200
}
# Remove catch reset event
arm9 vector_catch none
# CPU is halted, but we typed "reset run" ...
if { [string compare $sp_reset_mode "run"] == 0 } {
resume
}
}
# Override reset-assert, since no SRST available
# Catch reset event
proc sp_reset_assert {} {
arm9 vector_catch reset
}
# Override default init_reset{mode} to catch parameter "mode"
proc init_reset {mode} {
global sp_reset_mode
set sp_reset_mode $mode
# We need to detect CPU get halted, so exit from halt
if { [sp_is_halted] } {
echo "Resuming CPU to detect reset"
resume
}
# Execute default init_reset{mode}
jtag arp_init-reset
}
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