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