tcl/target/am335x.cfg

   1 source [find target/icepick.cfg]
   2
   3 if { [info exists CHIPNAME] } {
   4         set _CHIPNAME $CHIPNAME
   5 } else {
   6         set _CHIPNAME am335x
   7 }
   8
   9 # set the taps to be enabled by default. this can be overridden
  10 # by setting DEFAULT_TAPS in a separate configuration file
  11 # or directly on the command line.
  12 if { [info exists DEFAULT_TAPS] } {
  13         set _DEFAULT_TAPS "$DEFAULT_TAPS"
  14 } else {
  15         set _DEFAULT_TAPS "$_CHIPNAME.tap"
  16 }
  17
  18 #
  19 # Main DAP
  20 #
  21 if { [info exists DAP_TAPID] } {
  22         set _DAP_TAPID $DAP_TAPID
  23 } else {
  24         set _DAP_TAPID 0x4b6b902f
  25 }
  26 jtag newtap $_CHIPNAME tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID -disable
  27 jtag configure $_CHIPNAME.tap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 12 0"
  28 dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.tap
  29
  30 #
  31 # M3 DAP
  32 #
  33 if { [info exists M3_DAP_TAPID] } {
  34         set _M3_DAP_TAPID $M3_DAP_TAPID
  35 } else {
  36         set _M3_DAP_TAPID 0x4b6b902f
  37 }
  38 jtag newtap $_CHIPNAME m3_tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_M3_DAP_TAPID -disable
  39 jtag configure $_CHIPNAME.m3_tap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 11 0"
  40 dap create $_CHIPNAME.m3_dap -chain-position $_CHIPNAME.m3_tap
  41
  42 #
  43 # ICEpick-D (JTAG route controller)
  44 #
  45 if { [info exists JRC_TAPID] } {
  46         set _JRC_TAPID $JRC_TAPID
  47 } else {
  48         set _JRC_TAPID 0x0b94402f
  49 }
  50 jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f -expected-id $_JRC_TAPID -ignore-version
  51 jtag configure $_CHIPNAME.jrc -event setup {
  52         global _DEFAULT_TAPS
  53         enable_default_taps $_DEFAULT_TAPS
  54 }
  55 # some TCK tycles are required to activate the DEBUG power domain
  56 jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100"
  57
  58 #
  59 # helper function that enables all taps passed as argument
  60 #
  61 proc enable_default_taps { taps } {
  62         foreach tap $taps {
  63                 jtag tapenable $tap
  64         }
  65 }
  66
  67 #
  68 # Cortex-M3 target
  69 #
  70 set _TARGETNAME_2 $_CHIPNAME.m3
  71 target create $_TARGETNAME_2 cortex_m -dap $_CHIPNAME.m3_dap
  72
  73 #
  74 # Cortex-A8 target
  75 #
  76 set _TARGETNAME $_CHIPNAME.cpu
  77 target create $_TARGETNAME cortex_a -dap $_CHIPNAME.dap -dbgbase 0x80001000
  78
  79 # SRAM: 64K at 0x4030.0000; use the first 16K
  80 $_TARGETNAME configure -work-area-phys 0x40300000 -work-area-size 0x4000
  81
  82
  83 # when putting the target into 'reset halt', we need to disable the watchdog as
  84 # it would otherwise trigger while we're in JTAG
  85 # FIXME: unify with target/am437x.cfg
  86 source [find mem_helper.tcl]
  87 set  WDT1_BASE_ADDR                  0x44e35000
  88 set  WDT1_W_PEND_WSPR                [expr       $WDT1_BASE_ADDR     +  0x0034]
  89 set  WDT1_WSPR                       [expr       $WDT1_BASE_ADDR     +  0x0048]
  90 proc disable_watchdog { } {
  91         global WDT1_WSPR
  92         global WDT1_W_PEND_WSPR
  93         global _TARGETNAME
  94
  95         set curstate [$_TARGETNAME curstate]
  96
  97         if { [string compare $curstate halted] == 0 } {
  98                 set WDT_DISABLE_SEQ1    0xaaaa
  99                 set WDT_DISABLE_SEQ2    0x5555
 100
 101                 mww phys $WDT1_WSPR $WDT_DISABLE_SEQ1
 102
 103                 # Empty body to make sure this executes as fast as possible.
 104                 # We don't want any delays here otherwise romcode might start
 105                 # executing and end up changing state of certain IPs.
 106                 while { [expr [mrw $WDT1_W_PEND_WSPR] & 0x10] } { }
 107
 108                 mww phys $WDT1_WSPR $WDT_DISABLE_SEQ2
 109                 while { [expr [mrw $WDT1_W_PEND_WSPR] & 0x10] } { }
 110         }
 111 }
 112 $_TARGETNAME configure -event reset-end { disable_watchdog }