1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
# SPDX-License-Identifier: GPL-2.0-or-later
# Helper for common memory read/modify/write procedures
# mrw: "memory read word", returns value of $reg
proc mrw {reg} {
return [read_memory $reg 32 1]
}
add_usage_text mrw "address"
add_help_text mrw "Returns value of word in memory."
# mrh: "memory read halfword", returns value of $reg
proc mrh {reg} {
return [read_memory $reg 16 1]
}
add_usage_text mrh "address"
add_help_text mrh "Returns value of halfword in memory."
# mrb: "memory read byte", returns value of $reg
proc mrb {reg} {
return [read_memory $reg 8 1]
}
add_usage_text mrb "address"
add_help_text mrb "Returns value of byte 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;"
|
