diff options
Diffstat (limited to 'tcl/target/am335x.cfg')
| -rw-r--r-- | tcl/target/am335x.cfg | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tcl/target/am335x.cfg b/tcl/target/am335x.cfg index 7409615..3ca196b 100644 --- a/tcl/target/am335x.cfg +++ b/tcl/target/am335x.cfg @@ -76,3 +76,35 @@ target create $_TARGETNAME cortex_a -chain-position $_CHIPNAME.dap -dbgbase 0x80 # 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 } |