tcl/target/amdm37x.cfg

   1 #
   2 # Copyright (C)   2010        by Karl Kurbjun
   3 # Copyright (C)   2009, 2010  by Øyvind Harboe
   4 # Copyright (C)   2009        by David Brownell
   5 # Copyright (C)   2009        by Magnus Lundin
   6 #
   7 # TI AM/DM37x
   8 #  http://www.ti.com/litv/pdf/sprugn4b
   9 #
  10 # This script is based on the AM3517 initialization.  It should be considered
  11 # preliminary since it needs more complete testing and only the basic
  12 # operations work.
  13 #
  14
  15 ###############################################################################
  16 # User modifiable parameters
  17 ###############################################################################
  18
  19 # This script uses the variable CHIPTYPE to determine whether this is an AM35x
  20 # or DM37x target. If CHIPTYPE is not set it will error out.
  21 if { [info exists CHIPTYPE] } {
  22
  23    if { [info exists CHIPNAME] } {
  24       set  _CHIPNAME $CHIPNAME
  25    } else {
  26       set  _CHIPNAME $CHIPTYPE
  27    }
  28
  29    switch $CHIPTYPE {
  30       dm37x {
  31          # Primary TAP: ICEpick-C (JTAG route controller) and boundary scan
  32          set _JRC_TAPID 0x0b89102f
  33       }
  34       am35x {
  35          # Primary TAP: ICEpick-C (JTAG route controller) and boundary scan
  36          set _JRC_TAPID 0x0b7ae02f
  37       }
  38       default {
  39          error "ERROR: CHIPTYPE was set, but it was not set to a valid value.  Acceptable values are \"dm37x\" or \"am35x\"."
  40       }
  41    }
  42 } else {
  43   error "ERROR: CHIPTYPE was not defined. Please set CHIPTYPE to \"am35x\" for the AM35x or \"dm37x\" for the DM37x series in the board configuration."
  44 }
  45
  46 # Run the adapter at the fastest acceptable speed with the slowest possible
  47 # core clock.
  48 adapter_khz 10
  49
  50 ###############################################################################
  51 # JTAG setup
  52 # The OpenOCD commands are described in the TAP Declaration section
  53 #  http://openocd.berlios.de/doc/html/TAP-Declaration.html
  54 ###############################################################################
  55
  56 # The AM/DM37x has an ICEpick module in it like many of TI's other devices. More
  57 #  can be read about this module in sprugn4b under chapter 27:  "Debug and
  58 #  Emulation".  The module is used to route the JTAG chain to the various
  59 #  subsystems in the chip.
  60 source [find target/icepick.cfg]
  61
  62 # The TAP order should be described from the TDO connection in OpenOCD to the
  63 #  TDI pin.  The OpenOCD FAQ describes this in more detail:
  64 #  http://openocd.berlios.de/doc/html/FAQ.html
  65
  66 # From SPRUGN4B CH27 the available secondary TAPs are in this order from TDO:
  67 #
  68 #  Device   |  TAP number
  69 #  ---------|------------
  70 #  DAP      |  3
  71 #  Sequencer|  2   Note: The sequencer is an ARM968
  72 #  DSP      |  1
  73 #  D2D      |  0
  74 #
  75 # Right now the only secondary tap enabled is the DAP so the rest are left
  76 # undescribed.
  77
  78 ######
  79 # Start of Chain Description
  80 # The Secondary TAPs all have enable functions defined for use with the ICEpick
  81 # Only the DAP is enabled.  The AM37xx does not have the Sequencer or DSP but
  82 # the TAP numbers for ICEpick do not change.
  83 #
  84 # TODO: A disable function should also be added.
  85 ######
  86
  87 # Secondary TAP: DAP is closest to the TDO output
  88 # The TAP enable event also needs to be described
  89 jtag newtap $_CHIPNAME dap -irlen 4 -ircapture 0x1 -irmask 0xf -disable
  90 jtag configure $_CHIPNAME.dap -event tap-enable \
  91    "icepick_c_tapenable $_CHIPNAME.jrc 3"
  92
  93 # These taps are only present in the DM37x series.
  94 if { $CHIPTYPE == "dm37x" } {
  95    # Secondary TAP: Sequencer (ARM968) it is not in the chain by default
  96    # The ICEpick can be used to enable it in the chain.
  97    jtag newtap $_CHIPNAME arm2 -irlen 4 -ircapture 0x1 -irmask 0x0f -disable
  98    jtag configure $_CHIPNAME.arm2 -event tap-enable \
  99       "icepick_c_tapenable $_CHIPNAME.jrc 2"
 100
 101    # Secondary TAP: C64x+ DSP - it is not in the chain by default (-disable)
 102    # The ICEpick can be used to enable it in the chain.
 103    jtag newtap $_CHIPNAME dsp -irlen 38 -ircapture 0x25 -irmask 0x3f -disable
 104    jtag configure $_CHIPNAME.dsp -event tap-enable \
 105       "icepick_c_tapenable $_CHIPNAME.jrc 1"
 106 }
 107
 108 # Secondary TAP: D2D it is not in the chain by default (-disable)
 109 # The ICEpick can be used to enable it in the chain.
 110 # This IRLEN is probably incorrect - not sure where the documentation is.
 111 jtag newtap $_CHIPNAME d2d -irlen 4 -ircapture 0x1 -irmask 0x0f -disable
 112 jtag configure $_CHIPNAME.d2d -event tap-enable \
 113    "icepick_c_tapenable $_CHIPNAME.jrc 0"
 114
 115 # Primary TAP: ICEpick - it is closest to TDI so last in the chain
 116 jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f \
 117    -expected-id $_JRC_TAPID
 118
 119 ######
 120 # End of Chain Description
 121 ######
 122
 123 ######
 124 # Start JTAG TAP events
 125 ######
 126
 127 # some TCK tycles are required to activate the DEBUG power domain
 128 jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
 129
 130 # Enable the DAP TAP
 131 jtag configure $_CHIPNAME.jrc -event setup "jtag tapenable $_CHIPNAME.dap"
 132
 133 ######
 134 # End JTAG TAP events
 135 ######
 136
 137 ###############################################################################
 138 # Target Setup:
 139 # This section is described in the OpenOCD documentation under CPU Configuration
 140 #  http://openocd.berlios.de/doc/html/CPU-Configuration.html
 141 ###############################################################################
 142
 143 # Create the CPU target to be used with GDB:  Cortex-A8, using DAP
 144 set _TARGETNAME $_CHIPNAME.cpu
 145 target create $_TARGETNAME cortex_a8 -chain-position $_CHIPNAME.dap
 146
 147 # The DM37x has 64K of SRAM starting at address 0x4020_0000.  Allow the first
 148 # 16K to be used as a scratchpad for OpenOCD.
 149
 150 $_TARGETNAME configure -work-area-phys 0x40200000 -work-area-size 0x4000
 151
 152 ######
 153 # Start Target Reset Event Setup:
 154 ######
 155
 156 # Set the JTAG clock down to 10 kHz to be sure that it will work with the
 157 #  slowest possible core clock (16.8MHz/2 = 8.4MHz). It is OK to speed up
 158 #  *after* PLL and clock tree setup.
 159
 160 $_TARGETNAME configure -event "reset-start" { adapter_khz 10 }
 161
 162 # Reset needs to be performed in in software.
 163 # The AM/DM37x TRM (sprugn4b) describes the software reset in detail.
 164 # PRM_RSTCTRL is described in table 3-425 on page 618.  We assert RST_GS
 165 # (bit 1 (in 31:0) ) to do a warm reset.
 166
 167 # Create a vaiable for the register address
 168 set PRM_RSTCTRL 0x48307250
 169
 170 # Describe the reset assert process: A value of 2 must be written
 171 # (assert bit 1) to the physical address of PRM_RSTCTRL.
 172
 173 $_TARGETNAME configure -event \
 174    reset-assert "$_TARGETNAME mww phys $PRM_RSTCTRL 2"
 175
 176 # After the reset is asserted we need to re-initialize debugging and speed up
 177 # the JTAG clock.
 178
 179 $_TARGETNAME configure -event \
 180    reset-assert-post "amdm37x_dbginit $_TARGETNAME; adapter_khz 1000"
 181
 182 ######
 183 # End Target Reset Event Setup:
 184 ######
 185
 186 ###############################################################################
 187 # Target Functions
 188 # Add any functions needed for the target here
 189 ###############################################################################
 190
 191 # Run this to enable invasive debugging.  This is run automatically in the
 192 # reset sequence.
 193 proc amdm37x_dbginit {target} {
 194    # General Cortex A8 debug initialisation
 195    cortex_a8 dbginit
 196
 197    # Enable DBGEN signal.  This signal is described in the ARM v7 TRM, but
 198    # access to the signal appears to be implementation specific.  TI does not
 199    # describe this register much except a quick line that states DBGEM (sic) is
 200    # at this address and this bit.
 201    $target mww phys 0x5401d030 0x00002000
 202 }
 203