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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#include "processor.h"
#include "triggers.h"
namespace triggers {
mcontrol_t::mcontrol_t() :
type(2), maskmax(0), select(false), timing(false), chain(false),
match(MATCH_EQUAL), m(false), h(false), s(false), u(false), execute(false),
store(false), load(false)
{
}
reg_t mcontrol_t::tdata1_read(const processor_t *proc) const noexcept {
reg_t v = 0;
auto xlen = proc->get_xlen();
v = set_field(v, MCONTROL_TYPE(xlen), type);
v = set_field(v, MCONTROL_DMODE(xlen), dmode);
v = set_field(v, MCONTROL_MASKMAX(xlen), maskmax);
v = set_field(v, MCONTROL_SELECT, select);
v = set_field(v, MCONTROL_TIMING, timing);
v = set_field(v, MCONTROL_ACTION, action);
v = set_field(v, MCONTROL_CHAIN, chain);
v = set_field(v, MCONTROL_MATCH, match);
v = set_field(v, MCONTROL_M, m);
v = set_field(v, MCONTROL_H, h);
v = set_field(v, MCONTROL_S, s);
v = set_field(v, MCONTROL_U, u);
v = set_field(v, MCONTROL_EXECUTE, execute);
v = set_field(v, MCONTROL_STORE, store);
v = set_field(v, MCONTROL_LOAD, load);
return v;
}
bool mcontrol_t::tdata1_write(processor_t *proc, const reg_t val) noexcept {
if (dmode && !proc->get_state()->debug_mode) {
return false;
}
auto xlen = proc->get_xlen();
dmode = get_field(val, MCONTROL_DMODE(xlen));
select = get_field(val, MCONTROL_SELECT);
timing = get_field(val, MCONTROL_TIMING);
action = (triggers::action_t) get_field(val, MCONTROL_ACTION);
chain = get_field(val, MCONTROL_CHAIN);
unsigned match_value = get_field(val, MCONTROL_MATCH);
switch (match_value) {
case MATCH_EQUAL:
case MATCH_NAPOT:
case MATCH_GE:
case MATCH_LT:
case MATCH_MASK_LOW:
case MATCH_MASK_HIGH:
match = (triggers::mcontrol_t::match_t) match_value;
break;
default:
match = MATCH_EQUAL;
break;
}
m = get_field(val, MCONTROL_M);
h = get_field(val, MCONTROL_H);
s = get_field(val, MCONTROL_S);
u = get_field(val, MCONTROL_U);
execute = get_field(val, MCONTROL_EXECUTE);
store = get_field(val, MCONTROL_STORE);
load = get_field(val, MCONTROL_LOAD);
// Assume we're here because of csrw.
if (execute)
timing = 0;
proc->trigger_updated();
return true;
}
reg_t mcontrol_t::tdata2_read(const processor_t *proc) const noexcept {
return tdata2;
}
bool mcontrol_t::tdata2_write(processor_t *proc, const reg_t val) noexcept {
if (dmode && !proc->get_state()->debug_mode) {
return false;
}
tdata2 = val;
return true;
}
bool mcontrol_t::memory_access_match(processor_t *proc, operation_t operation, reg_t address, reg_t data) {
state_t *state = proc->get_state();
if ((operation == triggers::OPERATION_EXECUTE && !execute) ||
(operation == triggers::OPERATION_STORE && !store) ||
(operation == triggers::OPERATION_LOAD && !load) ||
(state->prv == PRV_M && !m) ||
(state->prv == PRV_S && !s) ||
(state->prv == PRV_U && !u)) {
return false;
}
reg_t value;
if (select) {
value = data;
} else {
value = address;
}
// We need this because in 32-bit mode sometimes the PC bits get sign
// extended.
auto xlen = proc->get_xlen();
if (xlen == 32) {
value &= 0xffffffff;
}
switch (match) {
case triggers::mcontrol_t::MATCH_EQUAL:
return value == tdata2;
case triggers::mcontrol_t::MATCH_NAPOT:
{
reg_t mask = ~((1 << (cto(tdata2)+1)) - 1);
return (value & mask) == (tdata2 & mask);
}
case triggers::mcontrol_t::MATCH_GE:
return value >= tdata2;
case triggers::mcontrol_t::MATCH_LT:
return value < tdata2;
case triggers::mcontrol_t::MATCH_MASK_LOW:
{
reg_t mask = tdata2 >> (xlen/2);
return (value & mask) == (tdata2 & mask);
}
case triggers::mcontrol_t::MATCH_MASK_HIGH:
{
reg_t mask = tdata2 >> (xlen/2);
return ((value >> (xlen/2)) & mask) == (tdata2 & mask);
}
}
assert(0);
}
module_t::module_t(unsigned count) : triggers(count) {
for (unsigned i = 0; i < count; i++) {
triggers[i] = new mcontrol_t();
}
}
// Return the index of a trigger that matched, or -1.
int module_t::memory_access_match(triggers::operation_t operation, reg_t address, reg_t data)
{
state_t *state = proc->get_state();
if (state->debug_mode)
return -1;
bool chain_ok = true;
for (unsigned int i = 0; i < triggers.size(); i++) {
if (!chain_ok) {
chain_ok |= !triggers[i]->chain;
continue;
}
if (triggers[i]->memory_access_match(proc, operation, address, data) &&
!triggers[i]->chain) {
return i;
}
chain_ok = true;
}
return -1;
}
};
|
