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Merge pull request #1136 from en-sc/en-sc/batch-logging 

target/riscv: DMI logging improvements
This commit is contained in:
Evgeniy Naydanov 2024-09-27 17:50:55 +03:00 committed by GitHub
parent f3302653a7 250aa20135
commit 27220e4c85
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
3 changed files with 136 additions and 97 deletions
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149
src/target/riscv/batch.c
View File

@ -6,6 +6,7 @@
#include "batch.h"
#include "debug_defines.h"
#include "debug_reg_printer.h"
#include "riscv.h"
#include "field_helpers.h"
@ -131,15 +132,141 @@ static void add_idle_before_batch(const struct riscv_batch *batch, size_t start_
}
static int get_delay(const struct riscv_batch *batch, size_t scan_idx,
const struct riscv_scan_delays *delays)
const struct riscv_scan_delays *delays, bool resets_delays,
size_t reset_delays_after)
{
assert(batch);
assert(scan_idx < batch->used_scans);
const bool delays_were_reset = resets_delays
&& (scan_idx >= reset_delays_after);
const enum riscv_scan_delay_class delay_class =
batch->delay_classes[scan_idx];
const unsigned int delay = riscv_scan_get_delay(delays, delay_class);
assert(delay <= INT_MAX);
return delay;
return delays_were_reset ? 0 : delay;
}
static unsigned int decode_dmi(const struct riscv_batch *batch, char *text,
uint32_t address, uint32_t data)
{
static const struct {
uint32_t address;
enum riscv_debug_reg_ordinal ordinal;
} description[] = {
{DM_DMCONTROL, DM_DMCONTROL_ORDINAL},
{DM_DMSTATUS, DM_DMSTATUS_ORDINAL},
{DM_ABSTRACTCS, DM_ABSTRACTCS_ORDINAL},
{DM_COMMAND, DM_COMMAND_ORDINAL},
{DM_SBCS, DM_SBCS_ORDINAL}
};
for (unsigned int i = 0; i < ARRAY_SIZE(description); i++) {
if (riscv_get_dmi_address(batch->target, description[i].address)
== address) {
const riscv_debug_reg_ctx_t context = {
.XLEN = { .value = 0, .is_set = false },
.DXLEN = { .value = 0, .is_set = false },
.abits = { .value = 0, .is_set = false },
};
return riscv_debug_reg_to_s(text, description[i].ordinal,
context, data, RISCV_DEBUG_REG_HIDE_ALL_0);
}
}
if (text)
text[0] = '\0';
return 0;
}
static void log_dmi_decoded(const struct riscv_batch *batch, bool write,
uint32_t address, uint32_t data)
{
const size_t size = decode_dmi(batch, /* text */ NULL, address, data) + 1;
char * const decoded = malloc(size);
if (!decoded) {
LOG_ERROR("Not enough memory to allocate %zu bytes.", size);
return;
}
decode_dmi(batch, decoded, address, data);
LOG_DEBUG("%s: %s", write ? "write" : "read", decoded);
free(decoded);
}
static void log_batch(const struct riscv_batch *batch, size_t start_idx,
const struct riscv_scan_delays *delays, bool resets_delays,
size_t reset_delays_after)
{
if (debug_level < LOG_LVL_DEBUG)
return;
const unsigned int scan_bits = batch->fields->num_bits;
assert(scan_bits == (unsigned int)riscv_get_dmi_scan_length(batch->target));
const unsigned int abits = scan_bits - DTM_DMI_OP_LENGTH
- DTM_DMI_DATA_LENGTH;
/* Determine the "op" and "address" of the scan that preceded the first
* executed scan.
* FIXME: The code here assumes that there were no DMI operations between
* the last execution of the batch and the current one.
* Caching the info about the last executed DMI scan in "dm013_info_t"
* would be a more robust solution.
*/
bool last_scan_was_read = false;
uint32_t last_scan_address = -1 /* to silence maybe-uninitialized */;
if (start_idx > 0) {
const struct scan_field * const field = &batch->fields[start_idx - 1];
assert(field->out_value);
last_scan_was_read = buf_get_u32(field->out_value, DTM_DMI_OP_OFFSET,
DTM_DMI_OP_LENGTH) == DTM_DMI_OP_READ;
last_scan_address = buf_get_u32(field->out_value,
DTM_DMI_ADDRESS_OFFSET, abits);
}
/* Decode and log every executed scan */
for (size_t i = start_idx; i < batch->used_scans; ++i) {
static const char * const op_string[] = {"-", "r", "w", "?"};
const int delay = get_delay(batch, i, delays, resets_delays,
reset_delays_after);
const struct scan_field * const field = &batch->fields[i];
assert(field->out_value);
const unsigned int out_op = buf_get_u32(field->out_value,
DTM_DMI_OP_OFFSET, DTM_DMI_OP_LENGTH);
const uint32_t out_data = buf_get_u32(field->out_value,
DTM_DMI_DATA_OFFSET, DTM_DMI_DATA_LENGTH);
const uint32_t out_address = buf_get_u32(field->out_value,
DTM_DMI_ADDRESS_OFFSET, abits);
if (field->in_value) {
static const char * const status_string[] = {
"+", "?", "F", "b"
};
const unsigned int in_op = buf_get_u32(field->in_value,
DTM_DMI_OP_OFFSET, DTM_DMI_OP_LENGTH);
const uint32_t in_data = buf_get_u32(field->in_value,
DTM_DMI_DATA_OFFSET, DTM_DMI_DATA_LENGTH);
const uint32_t in_address = buf_get_u32(field->in_value,
DTM_DMI_ADDRESS_OFFSET, abits);
LOG_DEBUG("%db %s %08" PRIx32 " @%02" PRIx32
" -> %s %08" PRIx32 " @%02" PRIx32 "; %di",
field->num_bits, op_string[out_op], out_data, out_address,
status_string[in_op], in_data, in_address, delay);
if (last_scan_was_read && in_op == DTM_DMI_OP_SUCCESS)
log_dmi_decoded(batch, /*write*/ false,
last_scan_address, in_data);
} else {
LOG_DEBUG("%db %s %08" PRIx32 " @%02" PRIx32 " -> ?; %di",
field->num_bits, op_string[out_op], out_data, out_address,
delay);
}
if (out_op == DTM_DMI_OP_WRITE)
log_dmi_decoded(batch, /*write*/ true, out_address,
out_data);
last_scan_was_read = out_op == DTM_DMI_OP_READ;
last_scan_address = out_address;
}
}
int riscv_batch_run_from(struct riscv_batch *batch, size_t start_idx,
@ -147,6 +274,7 @@ int riscv_batch_run_from(struct riscv_batch *batch, size_t start_idx,
size_t reset_delays_after)
{
assert(batch->used_scans);
assert(start_idx < batch->used_scans);
assert(batch->last_scan == RISCV_SCAN_TYPE_NOP);
assert(!batch->was_run || riscv_batch_was_scan_busy(batch, start_idx));
assert(start_idx == 0 || !riscv_batch_was_scan_busy(batch, start_idx - 1));
@ -157,17 +285,16 @@ int riscv_batch_run_from(struct riscv_batch *batch, size_t start_idx,
LOG_TARGET_DEBUG(batch->target, "Running batch of scans [%zu, %zu)",
start_idx, batch->used_scans);
unsigned int delay = 0 /* to silence maybe-uninitialized */;
for (size_t i = start_idx; i < batch->used_scans; ++i) {
if (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);
const bool delays_were_reset = resets_delays
&& (i >= reset_delays_after);
const int delay = get_delay(batch, i, delays);
if (!delays_were_reset)
delay = get_delay(batch, i, delays, resets_delays,
reset_delays_after);
if (delay > 0)
jtag_add_runtest(delay, TAP_IDLE);
}
@ -188,13 +315,9 @@ int riscv_batch_run_from(struct riscv_batch *batch, size_t start_idx,
}
}
for (size_t i = start_idx; i < batch->used_scans; ++i) {
const int delay = get_delay(batch, i, delays);
riscv_log_dmi_scan(batch->target, delay, batch->fields + i);
}
log_batch(batch, start_idx, delays, resets_delays, reset_delays_after);
batch->was_run = true;
batch->last_scan_delay = get_delay(batch, batch->used_scans - 1, delays);
batch->last_scan_delay = delay;
return ERROR_OK;
}

6
src/target/riscv/batch.h
View File

@ -228,10 +228,4 @@ size_t riscv_batch_available_scans(struct riscv_batch *batch);
/* Return true iff the last scan in the batch returned DMI_OP_BUSY. */
bool riscv_batch_was_batch_busy(const struct riscv_batch *batch);
/* TODO: The function is defined in `riscv-013.c`. This is done to reduce the
* diff of the commit. The intention is to move the function definition to
* a separate module (e.g. `riscv013-jtag-dtm.c/h`) in another commit. */
void riscv_log_dmi_scan(const struct target *target, int idle,
const struct scan_field *field);
#endif /* OPENOCD_TARGET_RISCV_BATCH_H */

78
src/target/riscv/riscv-013.c
View File

@ -349,84 +349,6 @@ static uint32_t set_dmcontrol_hartsel(uint32_t initial, int hart_index)
return initial;
}
static unsigned int decode_dmi(const struct target *target, char *text, uint32_t address, uint32_t data)
{
static const struct {
uint32_t address;
enum riscv_debug_reg_ordinal ordinal;
} description[] = {
{DM_DMCONTROL, DM_DMCONTROL_ORDINAL},
{DM_DMSTATUS, DM_DMSTATUS_ORDINAL},
{DM_ABSTRACTCS, DM_ABSTRACTCS_ORDINAL},
{DM_COMMAND, DM_COMMAND_ORDINAL},
{DM_SBCS, DM_SBCS_ORDINAL}
};
for (unsigned i = 0; i < ARRAY_SIZE(description); i++) {
if (riscv_get_dmi_address(target, description[i].address) == address) {
const riscv_debug_reg_ctx_t context = {
.XLEN = { .value = 0, .is_set = false },
.DXLEN = { .value = 0, .is_set = false },
.abits = { .value = 0, .is_set = false },
};
return riscv_debug_reg_to_s(text, description[i].ordinal,
context, data, RISCV_DEBUG_REG_HIDE_ALL_0);
}
}
if (text)
text[0] = '\0';
return 0;
}
/* TODO: Move this function to "batch.c" and make it static. */
void riscv_log_dmi_scan(const struct target *target, 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);
const uint64_t out = buf_get_u64(field->out_value, 0, field->num_bits);
const unsigned int out_op = get_field(out, DTM_DMI_OP);
const uint32_t out_data = get_field(out, DTM_DMI_DATA);
const uint32_t out_address = out >> DTM_DMI_ADDRESS_OFFSET;
if (field->in_value) {
const uint64_t in = buf_get_u64(field->in_value, 0, field->num_bits);
const unsigned int in_op = get_field(in, DTM_DMI_OP);
const uint32_t in_data = get_field(in, DTM_DMI_DATA);
const uint32_t in_address = in >> DTM_DMI_ADDRESS_OFFSET;
LOG_DEBUG("%db %s %08" PRIx32 " @%02" PRIx32 " -> %s %08" PRIx32 " @%02" PRIx32 "; %di",
field->num_bits, op_string[out_op], out_data, out_address,
status_string[in_op], in_data, in_address, idle);
if (in_op == DTM_DMI_OP_SUCCESS) {
char in_decoded[decode_dmi(target, NULL, in_address, in_data) + 1];
decode_dmi(target, in_decoded, in_address, in_data);
/* FIXME: The current code assumes that the hardware
* provides the read address in the dmi.address field
* when returning the dmi.data. That is however not
* required by the spec, and therefore not guaranteed.
* See https://github.com/riscv-collab/riscv-openocd/issues/1043
*/
LOG_DEBUG("read: %s", in_decoded);
}
} else {
LOG_DEBUG("%db %s %08" PRIx32 " @%02" PRIx32 " -> ?; %di",
field->num_bits, op_string[out_op], out_data, out_address,
idle);
}
if (out_op == DTM_DMI_OP_WRITE) {
char out_decoded[decode_dmi(target, NULL, out_address, out_data) + 1];
decode_dmi(target, out_decoded, out_address, out_data);
LOG_DEBUG("write: %s", out_decoded);
}
}
/*** Utility functions. ***/
static void select_dmi(struct target *target)