source [find target/icepick.cfg] if { [info exists CHIPNAME] } { set _CHIPNAME $CHIPNAME } else { set _CHIPNAME am335x } # set the taps to be enabled by default. this can be overridden # by setting DEFAULT_TAPS in a separate configuration file # or directly on the command line. if { [info exists DEFAULT_TAPS] } { set _DEFAULT_TAPS "$DEFAULT_TAPS" } else { set _DEFAULT_TAPS "$_CHIPNAME.tap" } # # Main DAP # if { [info exists DAP_TAPID] } { set _DAP_TAPID $DAP_TAPID } else { set _DAP_TAPID 0x4b6b902f } jtag newtap $_CHIPNAME tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_DAP_TAPID -disable jtag configure $_CHIPNAME.tap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 12 0" dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.tap # # M3 DAP # if { [info exists M3_DAP_TAPID] } { set _M3_DAP_TAPID $M3_DAP_TAPID } else { set _M3_DAP_TAPID 0x4b6b902f } jtag newtap $_CHIPNAME m3_tap -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_M3_DAP_TAPID -disable jtag configure $_CHIPNAME.m3_tap -event tap-enable "icepick_d_tapenable $_CHIPNAME.jrc 11 0" dap create $_CHIPNAME.m3_dap -chain-position $_CHIPNAME.m3_tap # # ICEpick-D (JTAG route controller) # if { [info exists JRC_TAPID] } { set _JRC_TAPID $JRC_TAPID } else { set _JRC_TAPID 0x0b94402f } jtag newtap $_CHIPNAME jrc -irlen 6 -ircapture 0x1 -irmask 0x3f -expected-id $_JRC_TAPID -ignore-version jtag configure $_CHIPNAME.jrc -event setup { global _DEFAULT_TAPS enable_default_taps $_DEFAULT_TAPS } # some TCK tycles are required to activate the DEBUG power domain jtag configure $_CHIPNAME.jrc -event post-reset "runtest 100" # # helper function that enables all taps passed as argument # proc enable_default_taps { taps } { foreach tap $taps { jtag tapenable $tap } } # # Cortex-M3 target # set _TARGETNAME_2 $_CHIPNAME.m3 target create $_TARGETNAME_2 cortex_m -dap $_CHIPNAME.m3_dap # # Cortex-A8 target # set _TARGETNAME $_CHIPNAME.cpu target create $_TARGETNAME cortex_a -dap $_CHIPNAME.dap -dbgbase 0x80001000 # SRAM: 64K at 0x4030.0000; use the first 16K $_TARGETNAME configure -work-area-phys 0x40300000 -work-area-size 0x4000 # when putting the target into 'reset halt', we need to disable the watchdog as # it would otherwise trigger while we're in JTAG # FIXME: unify with target/am437x.cfg source [find mem_helper.tcl] set WDT1_BASE_ADDR 0x44e35000 set WDT1_W_PEND_WSPR [expr $WDT1_BASE_ADDR + 0x0034] set WDT1_WSPR [expr $WDT1_BASE_ADDR + 0x0048] proc disable_watchdog { } { global WDT1_WSPR global WDT1_W_PEND_WSPR global _TARGETNAME set curstate [$_TARGETNAME curstate] if { [string compare $curstate halted] == 0 } { set WDT_DISABLE_SEQ1 0xaaaa set WDT_DISABLE_SEQ2 0x5555 mww phys $WDT1_WSPR $WDT_DISABLE_SEQ1 # Empty body to make sure this executes as fast as possible. # We don't want any delays here otherwise romcode might start # executing and end up changing state of certain IPs. while { [expr [mrw $WDT1_W_PEND_WSPR] & 0x10] } { } mww phys $WDT1_WSPR $WDT_DISABLE_SEQ2 while { [expr [mrw $WDT1_W_PEND_WSPR] & 0x10] } { } } } $_TARGETNAME configure -event reset-end { disable_watchdog }