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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "batch.h"
#include "debug_defines.h"
#include "riscv.h"
#define get_field(reg, mask) (((reg) & (mask)) / ((mask) & ~((mask) << 1)))
#define set_field(reg, mask, val) (((reg) & ~(mask)) | (((val) * ((mask) & ~((mask) << 1))) & (mask)))
#define DTM_DMI_MAX_ADDRESS_LENGTH ((1 << DTM_DTMCS_ABITS_LENGTH) - 1)
#define DMI_SCAN_MAX_BIT_LENGTH (DTM_DMI_MAX_ADDRESS_LENGTH + DTM_DMI_DATA_LENGTH + DTM_DMI_OP_LENGTH)
#define DMI_SCAN_BUF_SIZE (DIV_ROUND_UP(DMI_SCAN_MAX_BIT_LENGTH, 8))
static void dump_field(int idle, const struct scan_field *field);
struct riscv_batch *riscv_batch_alloc(struct target *target, size_t scans, size_t idle)
{
scans += 4;
struct riscv_batch *out = calloc(1, sizeof(*out));
out->target = target;
out->allocated_scans = scans;
out->idle_count = idle;
out->data_out = malloc(sizeof(*out->data_out) * (scans) * DMI_SCAN_BUF_SIZE);
out->data_in = malloc(sizeof(*out->data_in) * (scans) * DMI_SCAN_BUF_SIZE);
out->fields = malloc(sizeof(*out->fields) * (scans));
if (riscv_bscan_tunnel_ir_width != 0)
out->bscan_ctxt = malloc(sizeof(*out->bscan_ctxt) * (scans));
out->last_scan = RISCV_SCAN_TYPE_INVALID;
out->read_keys = malloc(sizeof(*out->read_keys) * (scans));
return out;
}
void riscv_batch_free(struct riscv_batch *batch)
{
free(batch->data_in);
free(batch->data_out);
free(batch->fields);
if (batch->bscan_ctxt)
free(batch->bscan_ctxt);
free(batch->read_keys);
free(batch);
}
bool riscv_batch_full(struct riscv_batch *batch)
{
return batch->used_scans > (batch->allocated_scans - 4);
}
int riscv_batch_run(struct riscv_batch *batch)
{
if (batch->used_scans == 0) {
LOG_DEBUG("Ignoring empty batch.");
return ERROR_OK;
}
keep_alive();
riscv_batch_add_nop(batch);
for (size_t i = 0; i < batch->used_scans; ++i) {
if (riscv_bscan_tunnel_ir_width != 0)
riscv_add_bscan_tunneled_scan(batch->target, batch->fields+i, batch->bscan_ctxt+i);
else
jtag_add_dr_scan(batch->target->tap, 1, batch->fields + i, TAP_IDLE);
if (batch->idle_count > 0)
jtag_add_runtest(batch->idle_count, TAP_IDLE);
}
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("Unable to execute JTAG queue");
return ERROR_FAIL;
}
if (riscv_bscan_tunnel_ir_width != 0) {
/* need to right-shift "in" by one bit, because of clock skew between BSCAN TAP and DM TAP */
for (size_t i = 0; i < batch->used_scans; ++i)
buffer_shr((batch->fields + i)->in_value, DMI_SCAN_BUF_SIZE, 1);
}
for (size_t i = 0; i < batch->used_scans; ++i)
dump_field(batch->idle_count, batch->fields + i);
return ERROR_OK;
}
void riscv_batch_add_dmi_write(struct riscv_batch *batch, unsigned address, uint64_t data)
{
assert(batch->used_scans < batch->allocated_scans);
struct scan_field *field = batch->fields + batch->used_scans;
field->num_bits = riscv_dmi_write_u64_bits(batch->target);
field->out_value = (void *)(batch->data_out + batch->used_scans * DMI_SCAN_BUF_SIZE);
field->in_value = (void *)(batch->data_in + batch->used_scans * DMI_SCAN_BUF_SIZE);
riscv_fill_dmi_write_u64(batch->target, (char *)field->out_value, address, data);
riscv_fill_dmi_nop_u64(batch->target, (char *)field->in_value);
batch->last_scan = RISCV_SCAN_TYPE_WRITE;
batch->used_scans++;
}
size_t riscv_batch_add_dmi_read(struct riscv_batch *batch, unsigned address)
{
assert(batch->used_scans < batch->allocated_scans);
struct scan_field *field = batch->fields + batch->used_scans;
field->num_bits = riscv_dmi_write_u64_bits(batch->target);
field->out_value = (void *)(batch->data_out + batch->used_scans * DMI_SCAN_BUF_SIZE);
field->in_value = (void *)(batch->data_in + batch->used_scans * DMI_SCAN_BUF_SIZE);
riscv_fill_dmi_read_u64(batch->target, (char *)field->out_value, address);
riscv_fill_dmi_nop_u64(batch->target, (char *)field->in_value);
batch->last_scan = RISCV_SCAN_TYPE_READ;
batch->used_scans++;
batch->read_keys[batch->read_keys_used] = batch->used_scans;
return batch->read_keys_used++;
}
unsigned riscv_batch_get_dmi_read_op(struct riscv_batch *batch, size_t key)
{
assert(key < batch->read_keys_used);
size_t index = batch->read_keys[key];
assert(index <= batch->used_scans);
uint8_t *base = batch->data_in + DMI_SCAN_BUF_SIZE * index;
/* extract "op" field from the DMI read result */
return (unsigned)buf_get_u32(base, DTM_DMI_OP_OFFSET, DTM_DMI_OP_LENGTH);
}
uint32_t riscv_batch_get_dmi_read_data(struct riscv_batch *batch, size_t key)
{
assert(key < batch->read_keys_used);
size_t index = batch->read_keys[key];
assert(index <= batch->used_scans);
uint8_t *base = batch->data_in + DMI_SCAN_BUF_SIZE * index;
/* extract "data" field from the DMI read result */
return (uint32_t)buf_get_u32(base, DTM_DMI_DATA_OFFSET, DTM_DMI_DATA_LENGTH);
}
void riscv_batch_add_nop(struct riscv_batch *batch)
{
assert(batch->used_scans < batch->allocated_scans);
struct scan_field *field = batch->fields + batch->used_scans;
field->num_bits = riscv_dmi_write_u64_bits(batch->target);
field->out_value = (void *)(batch->data_out + batch->used_scans * DMI_SCAN_BUF_SIZE);
field->in_value = (void *)(batch->data_in + batch->used_scans * DMI_SCAN_BUF_SIZE);
riscv_fill_dmi_nop_u64(batch->target, (char *)field->out_value);
riscv_fill_dmi_nop_u64(batch->target, (char *)field->in_value);
batch->last_scan = RISCV_SCAN_TYPE_NOP;
batch->used_scans++;
}
void dump_field(int idle, const struct scan_field *field)
{
static const char * const op_string[] = {"-", "r", "w", "?"};
static const char * const status_string[] = {"+", "?", "F", "b"};
if (debug_level < LOG_LVL_DEBUG)
return;
assert(field->out_value != NULL);
uint64_t out = buf_get_u64(field->out_value, 0, field->num_bits);
unsigned int out_op = get_field(out, DTM_DMI_OP);
unsigned int out_data = get_field(out, DTM_DMI_DATA);
unsigned int out_address = out >> DTM_DMI_ADDRESS_OFFSET;
if (field->in_value) {
uint64_t in = buf_get_u64(field->in_value, 0, field->num_bits);
unsigned int in_op = get_field(in, DTM_DMI_OP);
unsigned int in_data = get_field(in, DTM_DMI_DATA);
unsigned int in_address = in >> DTM_DMI_ADDRESS_OFFSET;
log_printf_lf(LOG_LVL_DEBUG,
__FILE__, __LINE__, __PRETTY_FUNCTION__,
"%db %s %08x @%02x -> %s %08x @%02x; %di",
field->num_bits, op_string[out_op], out_data, out_address,
status_string[in_op], in_data, in_address, idle);
} else {
log_printf_lf(LOG_LVL_DEBUG,
__FILE__, __LINE__, __PRETTY_FUNCTION__, "%db %s %08x @%02x -> ?; %di",
field->num_bits, op_string[out_op], out_data, out_address, idle);
}
}
size_t riscv_batch_available_scans(struct riscv_batch *batch)
{
return batch->allocated_scans - batch->used_scans - 4;
}
|
