diff options
Diffstat (limited to 'tcl/target')
| -rw-r--r-- | tcl/target/amdm37x.cfg | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/tcl/target/amdm37x.cfg b/tcl/target/amdm37x.cfg new file mode 100644 index 00000000..ab186815 --- /dev/null +++ b/tcl/target/amdm37x.cfg @@ -0,0 +1,203 @@ +# +# Copyright (C) 2010 by Karl Kurbjun +# Copyright (C) 2009, 2010 by Øyvind Harboe +# Copyright (C) 2009 by David Brownell +# Copyright (C) 2009 by Magnus Lundin +# +# TI AM/DM37x +# http://www.ti.com/litv/pdf/sprugn4b +# +# This script is based on the AM3517 initialization. It should be considered +# preliminary since it needs more complete testing and only the basic +# operations work. +# + +############################################################################### +# User modifiable parameters +############################################################################### + +# This script uses the variable CHIPTYPE to determine whether this is an AM35x +# or DM37x target. If CHIPTYPE is not set it will error out. +if { [info exists CHIPTYPE] } { + + if { [info exists CHIPNAME] } { + set _CHIPNAME $CHIPNAME + } else { + set _CHIPNAME $CHIPTYPE + } + + switch $CHIPTYPE { + dm37x { + # Primary TAP: ICEpick-C (JTAG route controller) and boundary scan + set _JRC_TAPID 0x0b89102f + } + am35x { + # Primary TAP: ICEpick-C (JTAG route controller) and boundary scan + set _JRC_TAPID 0x0b7ae02f + } + default { + error "ERROR: CHIPTYPE was set, but it was not set to a valid value. Acceptable values are \"dm37x\" or \"am35x\"." + } + } +} else { + error "ERROR: CHIPTYPE was not defined. Please set CHIPTYPE to \"am35x\" for the AM35x or \"dm37x\" for the DM37x series in the board configuration." +} + +# Run the adapter at the fastest acceptable speed with the slowest possible +# core clock. +adapter_khz 10 + +############################################################################### +# JTAG setup +# The OpenOCD commands are described in the TAP Declaration section +# http://openocd.berlios.de/doc/html/TAP-Declaration.html +############################################################################### + +# The AM/DM37x has an ICEpick module in it like many of TI's other devices. More +# can be read about this module in sprugn4b under chapter 27: "Debug and +# Emulation". The module is used to route the JTAG chain to the various +# subsystems in the chip. +source [find target/icepick.cfg] + +# The TAP order should be described from the TDO connection in OpenOCD to the +# TDI pin. The OpenOCD FAQ describes this in more detail: +# http://openocd.berlios.de/doc/html/FAQ.html + +# From SPRUGN4B CH27 the available secondary TAPs are in this order from TDO: +# +# Device | TAP number +# ---------|------------ +# DAP | 3 +# Sequencer| 2 Note: The sequencer is an ARM968 +# DSP | 1 +# D2D | 0 +# +# Right now the only secondary tap enabled is the DAP so the rest are left +# undescribed. + +###### +# Start of Chain Description +# The Secondary TAPs all have enable functions defined for use with the ICEpick +# Only the DAP is enabled. The AM37xx does not have the Sequencer or DSP but +# the TAP numbers for ICEpick do not change. +# +# TODO: A disable function should also be added. +###### + +# Secondary TAP: DAP is closest to the TDO output +# The TAP enable event also needs to be described +jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf -disable +jtag configure $_CHIPNAME.dap -event tap-enable \ + "icepick_c_tapenable $_CHIPNAME.jrc 3" + +# These taps are only present in the DM37x series. +if { $CHIPTYPE == "dm37x" } { + # Secondary TAP: Sequencer (ARM968) it is not in the chain by default + # The ICEpick can be used to enable it in the chain. + jtag newtap $_CHIPNAME arm2 -irlen 4 -ircapture 0x1 -irmask 0x0f -disable + jtag configure $_CHIPNAME.arm2 -event tap-enable \ + "icepick_c_tapenable $_CHIPNAME.jrc 2" + + # Secondary TAP: C64x+ DSP - it is not in the chain by default (-disable) + # The ICEpick can be used to enable it in the chain. + jtag newtap $_CHIPNAME dsp -irlen 38 -ircapture 0x25 -irmask 0x3f -disable + jtag configure $_CHIPNAME.dsp -event tap-enable \ + "icepick_c_tapenable $_CHIPNAME.jrc 1" +} + +# Secondary TAP: D2D it is not in the chain by default (-disable) +# The ICEpick can be used to enable it in the chain. +# This IRLEN is probably incorrect - not sure where the documentation is. +jtag newtap $_CHIPNAME d2d -irlen 4 -ircapture 0x1 -irmask 0x0f -disable +jtag configure $_CHIPNAME.d2d -event tap-enable \ + "icepick_c_tapenable $_CHIPNAME.jrc 0" + +# Primary TAP: ICEpick - it is closest to TDI so last in the chain +jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f \ + -expected-id $_JRC_TAPID + +###### +# End of Chain Description +###### + +###### +# Start JTAG TAP events +###### + +# some TCK tycles are required to activate the DEBUG power domain +jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100" + +# Enable the DAP TAP +jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap" + +###### +# End JTAG TAP events +###### + +############################################################################### +# Target Setup: +# This section is described in the OpenOCD documentation under CPU Configuration +# http://openocd.berlios.de/doc/html/CPU-Configuration.html +############################################################################### + +# Create the CPU target to be used with GDB: Cortex-A8, using DAP +set _TARGETNAME $_CHIPNAME.cpu +target create $_TARGETNAME cortex_a8 -chain-position $_CHIPNAME.dap + +# The DM37x has 64K of SRAM starting at address 0x4020_0000. Allow the first +# 16K to be used as a scratchpad for OpenOCD. + +$_TARGETNAME configure -work-area-phys 0x40200000 -work-area-size 0x4000 + +###### +# Start Target Reset Event Setup: +###### + +# Set the JTAG clock down to 10 kHz to be sure that it will work with the +# slowest possible core clock (16.8MHz/2 = 8.4MHz). It is OK to speed up +# *after* PLL and clock tree setup. + +$_TARGETNAME configure -event "reset-start" { adapter_khz 10 } + +# Reset needs to be performed in in software. +# The AM/DM37x TRM (sprugn4b) describes the software reset in detail. +# PRM_RSTCTRL is described in table 3-425 on page 618. We assert RST_GS +# (bit 1 (in 31:0) ) to do a warm reset. + +# Create a vaiable for the register address +set PRM_RSTCTRL 0x48307250 + +# Describe the reset assert process: A value of 2 must be written +# (assert bit 1) to the physical address of PRM_RSTCTRL. + +$_TARGETNAME configure -event \ + reset-assert "$_TARGETNAME mww phys $PRM_RSTCTRL 2" + +# After the reset is asserted we need to re-initialize debugging and speed up +# the JTAG clock. + +$_TARGETNAME configure -event \ + reset-assert-post "amdm37x_dbginit $_TARGETNAME; adapter_khz 1000" + +###### +# End Target Reset Event Setup: +###### + +############################################################################### +# Target Functions +# Add any functions needed for the target here +############################################################################### + +# Run this to enable invasive debugging. This is run automatically in the +# reset sequence. +proc amdm37x_dbginit {target} { + # General Cortex A8 debug initialisation + cortex_a8 dbginit + + # Enable DBGEN signal. This signal is described in the ARM v7 TRM, but + # access to the signal appears to be implementation specific. TI does not + # describe this register much except a quick line that states DBGEM (sic) is + # at this address and this bit. + $target mww phys 0x5401d030 0x00002000 +} + |