cortex_m: deprecate soft_reset_halt
[openocd.git] / tcl / mem_helper.tcl
1 # Helper for common memory read/modify/write procedures
2
3 # mrw: "memory read word", returns value of $reg
4 proc mrw {reg} {
5 set value ""
6 mem2array value 32 $reg 1
7 return $value(0)
8 }
9
10 add_usage_text mrw "address"
11 add_help_text mrw "Returns value of word in memory."
12
13 # mmw: "memory modify word", updates value of $reg
14 # $reg <== ((value & ~$clearbits) | $setbits)
15 proc mmw {reg setbits clearbits} {
16 set old [mrw $reg]
17 set new [expr ($old & ~$clearbits) | $setbits]
18 mww $reg $new
19 }
20
21 add_usage_text mmw "address setbits clearbits"
22 add_help_text mmw "Modify word in memory. new_val = (old_val & ~clearbits) | setbits;"