212 lines
7.1 KiB
INI
212 lines
7.1 KiB
INI
#
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# Copyright (C) 2010-2011 by Karl Kurbjun
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# Copyright (C) 2009-2011 by Øyvind Harboe
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# Copyright (C) 2009 by David Brownell
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# Copyright (C) 2009 by Magnus Lundin
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#
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# TI AM/DM37x
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# http://www.ti.com/litv/pdf/sprugn4b
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#
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# This script is based on the AM3517 initialization. It should be considered
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# preliminary since it needs more complete testing and only the basic
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# operations work.
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#
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###############################################################################
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# User modifiable parameters
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###############################################################################
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# This script uses the variable CHIPTYPE to determine whether this is an AM35x
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# or DM37x target. If CHIPTYPE is not set it will error out.
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if { [info exists CHIPTYPE] } {
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if { [info exists CHIPNAME] } {
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set _CHIPNAME $CHIPNAME
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} else {
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set _CHIPNAME $CHIPTYPE
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}
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switch $CHIPTYPE {
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dm37x {
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# Primary TAP: ICEpick-C (JTAG route controller) and boundary scan
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set _JRC_TAPID "-expected-id 0x2b89102f -expected-id 0x1b89102f -expected-id 0x0b89102f"
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}
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am35x {
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# Primary TAP: ICEpick-C (JTAG route controller) and boundary scan
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set _JRC_TAPID "-expected-id 0x0b7ae02f"
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}
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default {
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error "ERROR: CHIPTYPE was set, but it was not set to a valid value. Acceptable values are \"dm37x\" or \"am35x\"."
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}
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}
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} else {
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error "ERROR: CHIPTYPE was not defined. Please set CHIPTYPE to \"am35x\" for the AM35x or \"dm37x\" for the DM37x series in the board configuration."
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}
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# Run the adapter at the fastest acceptable speed with the slowest possible
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# core clock.
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adapter_khz 10
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###############################################################################
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# JTAG setup
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# The OpenOCD commands are described in the TAP Declaration section
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# http://openocd.berlios.de/doc/html/TAP-Declaration.html
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###############################################################################
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# The AM/DM37x has an ICEpick module in it like many of TI's other devices. More
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# can be read about this module in sprugn4b under chapter 27: "Debug and
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# Emulation". The module is used to route the JTAG chain to the various
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# subsystems in the chip.
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source [find target/icepick.cfg]
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# The TAP order should be described from the TDO connection in OpenOCD to the
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# TDI pin. The OpenOCD FAQ describes this in more detail:
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# http://openocd.berlios.de/doc/html/FAQ.html
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# From SPRUGN4B CH27 the available secondary TAPs are in this order from TDO:
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#
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# Device | TAP number
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# ---------|------------
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# DAP | 3
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# Sequencer| 2 Note: The sequencer is an ARM968
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# DSP | 1
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# D2D | 0
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#
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# Right now the only secondary tap enabled is the DAP so the rest are left
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# undescribed.
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######
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# Start of Chain Description
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# The Secondary TAPs all have enable functions defined for use with the ICEpick
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# Only the DAP is enabled. The AM37xx does not have the Sequencer or DSP but
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# the TAP numbers for ICEpick do not change.
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#
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# TODO: A disable function should also be added.
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######
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# Secondary TAP: DAP is closest to the TDO output
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# The TAP enable event also needs to be described
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jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf -disable
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jtag configure $_CHIPNAME.dap -event tap-enable \
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"icepick_c_tapenable $_CHIPNAME.jrc 3"
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# These taps are only present in the DM37x series.
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if { $CHIPTYPE == "dm37x" } {
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# Secondary TAP: Sequencer (ARM968) it is not in the chain by default
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# The ICEpick can be used to enable it in the chain.
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jtag newtap $_CHIPNAME arm2 -irlen 4 -ircapture 0x1 -irmask 0x0f -disable
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jtag configure $_CHIPNAME.arm2 -event tap-enable \
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"icepick_c_tapenable $_CHIPNAME.jrc 2"
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# Secondary TAP: C64x+ DSP - it is not in the chain by default (-disable)
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# The ICEpick can be used to enable it in the chain.
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jtag newtap $_CHIPNAME dsp -irlen 38 -ircapture 0x25 -irmask 0x3f -disable
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jtag configure $_CHIPNAME.dsp -event tap-enable \
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"icepick_c_tapenable $_CHIPNAME.jrc 1"
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}
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# Secondary TAP: D2D it is not in the chain by default (-disable)
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# The ICEpick can be used to enable it in the chain.
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# This IRLEN is probably incorrect - not sure where the documentation is.
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jtag newtap $_CHIPNAME d2d -irlen 4 -ircapture 0x1 -irmask 0x0f -disable
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jtag configure $_CHIPNAME.d2d -event tap-enable \
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"icepick_c_tapenable $_CHIPNAME.jrc 0"
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# Primary TAP: ICEpick - it is closest to TDI so last in the chain
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eval "jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f $_JRC_TAPID"
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######
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# End of Chain Description
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######
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######
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# Start JTAG TAP events
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######
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# some TCK tycles are required to activate the DEBUG power domain
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jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
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# Enable the DAP TAP
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jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap"
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######
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# End JTAG TAP events
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######
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###############################################################################
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# Target Setup:
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# This section is described in the OpenOCD documentation under CPU Configuration
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# http://openocd.berlios.de/doc/html/CPU-Configuration.html
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###############################################################################
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# Create the CPU target to be used with GDB: Cortex-A8, using DAP
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set _TARGETNAME $_CHIPNAME.cpu
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target create $_TARGETNAME cortex_a8 -chain-position $_CHIPNAME.dap
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# The DM37x has 64K of SRAM starting at address 0x4020_0000. Allow the first
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# 16K to be used as a scratchpad for OpenOCD.
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$_TARGETNAME configure -work-area-phys 0x40200000 -work-area-size 0x4000
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######
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# Start Target Reset Event Setup:
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######
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# Set the JTAG clock down to 10 kHz to be sure that it will work with the
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# slowest possible core clock (16.8MHz/2 = 8.4MHz). It is OK to speed up
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# *after* PLL and clock tree setup.
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$_TARGETNAME configure -event "reset-start" { adapter_khz 10 }
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# Describe the reset assert process for openocd - this is asserted with the
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# ICEPick
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$_TARGETNAME configure -event "reset-assert" {
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global _CHIPNAME
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# assert warm system reset through ICEPick
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icepick_c_wreset $_CHIPNAME.jrc
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}
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# After the reset is asserted we need to re-initialize debugging and speed up
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# the JTAG clock.
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$_TARGETNAME configure -event reset-assert-post {
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global _TARGETNAME
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amdm37x_dbginit $_TARGETNAME
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adapter_khz 1000
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}
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$_TARGETNAME configure -event gdb-attach {
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global _TARGETNAME
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amdm37x_dbginit $_TARGETNAME
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echo "Halting target"
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halt
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}
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######
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# End Target Reset Event Setup:
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######
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###############################################################################
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# Target Functions
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# Add any functions needed for the target here
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###############################################################################
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# Run this to enable invasive debugging. This is run automatically in the
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# reset sequence.
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proc amdm37x_dbginit {target} {
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# General Cortex A8 debug initialisation
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cortex_a8 dbginit
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# Enable DBGEN signal. This signal is described in the ARM v7 TRM, but
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# access to the signal appears to be implementation specific. TI does not
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# describe this register much except a quick line that states DBGEM (sic) is
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# at this address and this bit.
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$target mww phys 0x5401d030 0x00002000
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}
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