23 lines
630 B
Tcl
23 lines
630 B
Tcl
|
# Helper for common memory read/modify/write procedures
|
||
|
|
|
||
|
|
# mrw: "memory read word", returns value of $reg
|
||
|
|
proc mrw {reg} {
|
||
|
|
set value ""
|
||
|
|
ocd_mem2array value 32 $reg 1
|
||
|
|
return $value(0)
|
||
|
|
}
|
||
|
|
|
||
|
|
add_usage_text mrw "address"
|
||
|
|
add_help_text mrw "Returns value of word in memory."
|
||
|
|
|
||
|
|
# mmw: "memory modify word", updates value of $reg
|
||
|
|
# $reg <== ((value & ~$clearbits) | $setbits)
|
||
|
|
proc mmw {reg setbits clearbits} {
|
||
|
|
set old [mrw $reg]
|
||
|
|
set new [expr ($old & ~$clearbits) | $setbits]
|
||
|
|
mww $reg $new
|
||
|
|
}
|
||
|
|
|
||
|
|
add_usage_text mmw "address setbits clearbits"
|
||
|
|
add_help_text mmw "Modify word in memory. new_val = (old_val & ~clearbits) | setbits;"
|