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source [find target/icepick.cfg]
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME am335x
}
# set the taps to be enabled by default. this can be overridden
# by setting DEFAULT_TAPS in a separate configuration file
# or directly on the command line.
if { [info exists DEFAULT_TAPS] } {
set _DEFAULT_TAPS "$DEFAULT_TAPS"
} else {
set _DEFAULT_TAPS "$_CHIPNAME.dap"
}
#
# Main DAP
#
if { [info exists DAP_TAPID] } {
set _DAP_TAPID $DAP_TAPID
} else {
set _DAP_TAPID 0x4b6b902f
}
jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID -disable
jtag configure $_CHIPNAME.dap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 12 0"
#
# M3 DAP
#
if { [info exists M3_DAP_TAPID] } {
set _M3_DAP_TAPID $M3_DAP_TAPID
} else {
set _M3_DAP_TAPID 0x4b6b902f
}
jtag newtap $_CHIPNAME m3_dap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_M3_DAP_TAPID -disable
jtag configure $_CHIPNAME.m3_dap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 11 0"
#
# ICEpick-D (JTAG route controller)
#
if { [info exists JRC_TAPID] } {
set _JRC_TAPID $JRC_TAPID
} else {
set _JRC_TAPID 0x0b94402f
}
jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f -expected-id $_JRC_TAPID -ignore-version
jtag configure $_CHIPNAME.jrc -event setup {
global _DEFAULT_TAPS
enable_default_taps $_DEFAULT_TAPS
}
# some TCK tycles are required to activate the DEBUG power domain
jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
#
# helper function that enables all taps passed as argument
#
proc enable_default_taps { taps } {
foreach tap $taps {
jtag tapenable $tap
}
}
#
# Cortex-M3 target
#
set _TARGETNAME_2 $_CHIPNAME.m3
target create $_TARGETNAME_2 cortex_m -chain-position $_CHIPNAME.m3_dap
#
# Cortex-A8 target
#
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_a -chain-position $_CHIPNAME.dap -dbgbase 0x80001000
# SRAM: 64K at 0x4030.0000; use the first 16K
$_TARGETNAME configure -work-area-phys 0x40300000 -work-area-size 0x4000
# when putting the target into 'reset halt', we need to disable the watchdog as
# it would otherwise trigger while we're in JTAG
# FIXME: unify with target/am437x.cfg
source [find mem_helper.tcl]
set WDT1_BASE_ADDR 0x44e35000
set WDT1_W_PEND_WSPR [expr $WDT1_BASE_ADDR + 0x0034]
set WDT1_WSPR [expr $WDT1_BASE_ADDR + 0x0048]
proc disable_watchdog { } {
global WDT1_WSPR
global WDT1_W_PEND_WSPR
global _TARGETNAME
set curstate [$_TARGETNAME curstate]
if { [string compare $curstate halted] == 0 } {
set WDT_DISABLE_SEQ1 0xaaaa
set WDT_DISABLE_SEQ2 0x5555
mww phys $WDT1_WSPR $WDT_DISABLE_SEQ1
# Empty body to make sure this executes as fast as possible.
# We don't want any delays here otherwise romcode might start
# executing and end up changing state of certain IPs.
while { [expr [mrw $WDT1_W_PEND_WSPR] & 0x10] } { }
mww phys $WDT1_WSPR $WDT_DISABLE_SEQ2
while { [expr [mrw $WDT1_W_PEND_WSPR] & 0x10] } { }
}
}
$_TARGETNAME configure -event reset-end { disable_watchdog }
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