diff options
| -rw-r--r-- | tcl/target/omap3530.cfg | 40 |
1 files changed, 25 insertions, 15 deletions
diff --git a/tcl/target/omap3530.cfg b/tcl/target/omap3530.cfg index 84460705..45f3c01c 100644 --- a/tcl/target/omap3530.cfg +++ b/tcl/target/omap3530.cfg @@ -34,28 +34,38 @@ if { [info exists JRC_TAPID ] } { jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f \ -expected-id $_JRC_TAPID -jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100" - # GDB target: Cortex-A8, using DAP -target create omap3.cpu cortex_a8 -chain-position $_CHIPNAME.dap +set _TARGETNAME $_CHIPNAME.cpu +target create $_TARGETNAME cortex_a8 -chain-position $_CHIPNAME.dap + +################### -# FIXME much of this should be in reset event handlers -proc omap3_dbginit { } { - poll off - sleep 100 +# the reset sequence is event-driven +# and kind of finicky... + +# some TCK tycles are required to activate the DEBUG power domain +jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100" - jtag tapenable omap3530.dap - targets +# have the DAP "always" be active +jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap" + +proc omap3_dbginit {target} { # General Cortex A8 debug initialisation cortex_a8 dbginit # Enable DBGU signal for OMAP353x - omap3.cpu mww 0x5401d030 0x00002000 - poll on + $target mww 0x5401d030 0x00002000 } -set PRM_RSTCTRL 0x48307250 - -omap3.cpu configure -event reset-start "omap3.cpu mww $PRM_RSTCTRL 2" -omap3.cpu configure -event reset-assert-pre "omap3_dbginit" +# be absolutely certain the JTAG clock will work with the worst-case +# 16.8MHz/2 = 8.4MHz core clock, even before a bootloader kicks in. +# OK to speed up *after* PLL and clock tree setup. +jtag_rclk 1000 +$_TARGETNAME configure -event "reset-start" { jtag_rclk 1000 } +# REVISIT This assumes that SRST is unavailable, so we must assert reset +# ourselves using PRM_RSTCTRL. RST_GS (2) is a warm reset, like ICEpick +# would issue. RST_DPLL3 (4) is a cold reset. +set PRM_RSTCTRL 0x48307250 +$_TARGETNAME configure -event reset-assert-pre "$_TARGETNAME mww $PRM_RSTCTRL 2" +$_TARGETNAME configure -event reset-assert-post "omap3_dbginit $_TARGETNAME" |