summaryrefslogtreecommitdiff
path: root/src/target/etm.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/target/etm.c')
-rw-r--r--src/target/etm.c227
1 files changed, 176 insertions, 51 deletions
diff --git a/src/target/etm.c b/src/target/etm.c
index cc80b685..91c73a23 100644
--- a/src/target/etm.c
+++ b/src/target/etm.c
@@ -71,10 +71,14 @@ struct etm_reg_info {
* Newer versions of ETM make some W/O registers R/W, and
* provide definitions for some previously-unused bits.
*/
-static const struct etm_reg_info reg[] = {
+
+/* basic registers that are always there given the right ETM version */
+static const struct etm_reg_info etm_core[] = {
+ /* NOTE: we "know" ETM_CONFIG is listed first */
+ { ETM_CONFIG, 32, RO, 0x10, "ETM_CONFIG", },
+
/* ETM Trace Registers */
{ ETM_CTRL, 32, RW, 0x10, "ETM_CTRL", },
- { ETM_CONFIG, 32, RO, 0x10, "ETM_CONFIG", },
{ ETM_TRIG_EVENT, 17, WO, 0x10, "ETM_TRIG_EVENT", },
{ ETM_ASIC_CTRL, 8, WO, 0x10, "ETM_ASIC_CTRL", },
{ ETM_STATUS, 3, RO, 0x11, "ETM_STATUS", },
@@ -86,16 +90,25 @@ static const struct etm_reg_info reg[] = {
{ ETM_TRACE_EN_EVENT, 17, WO, 0x10, "ETM_TRACE_EN_EVENT", },
{ ETM_TRACE_EN_CTRL1, 26, WO, 0x10, "ETM_TRACE_EN_CTRL1", },
- /* FIFOFULL configuration */
- { ETM_FIFOFULL_REGION, 25, WO, 0x10, "ETM_FIFOFULL_REGION", },
- { ETM_FIFOFULL_LEVEL, 8, WO, 0x10, "ETM_FIFOFULL_LEVEL", },
-
/* ViewData configuration (data trace) */
{ ETM_VIEWDATA_EVENT, 17, WO, 0x10, "ETM_VIEWDATA_EVENT", },
{ ETM_VIEWDATA_CTRL1, 32, WO, 0x10, "ETM_VIEWDATA_CTRL1", },
{ ETM_VIEWDATA_CTRL2, 32, WO, 0x10, "ETM_VIEWDATA_CTRL2", },
{ ETM_VIEWDATA_CTRL3, 17, WO, 0x10, "ETM_VIEWDATA_CTRL3", },
+ /* REVISIT exclude VIEWDATA_CTRL2 when it's not there */
+
+ { 0x78, 12, WO, 0x20, "ETM_SYNC_FREQ", },
+ { 0x79, 32, RO, 0x20, "ETM_ID", },
+};
+
+static const struct etm_reg_info etm_fifofull[] = {
+ /* FIFOFULL configuration */
+ { ETM_FIFOFULL_REGION, 25, WO, 0x10, "ETM_FIFOFULL_REGION", },
+ { ETM_FIFOFULL_LEVEL, 8, WO, 0x10, "ETM_FIFOFULL_LEVEL", },
+};
+
+static const struct etm_reg_info etm_addr_comp[] = {
/* Address comparator register pairs */
#define ADDR_COMPARATOR(i) \
{ ETM_ADDR_COMPARATOR_VALUE + (i), 32, WO, 0x10, \
@@ -120,7 +133,9 @@ static const struct etm_reg_info reg[] = {
ADDR_COMPARATOR(14),
ADDR_COMPARATOR(15),
#undef ADDR_COMPARATOR
+};
+static const struct etm_reg_info etm_data_comp[] = {
/* Data Value Comparators (NOTE: odd addresses are reserved) */
#define DATA_COMPARATOR(i) \
{ ETM_DATA_COMPARATOR_VALUE + 2*(i), 32, WO, 0x10, \
@@ -136,8 +151,9 @@ static const struct etm_reg_info reg[] = {
DATA_COMPARATOR(6),
DATA_COMPARATOR(7),
#undef DATA_COMPARATOR
+};
- /* Counters */
+static const struct etm_reg_info etm_counters[] = {
#define COUNTER(i) \
{ ETM_COUNTER_RELOAD_VALUE + (i), 16, WO, 0x10, \
"ETM_COUNTER_RELOAD_VALUE" #i, }, \
@@ -152,8 +168,9 @@ static const struct etm_reg_info reg[] = {
COUNTER(2),
COUNTER(3),
#undef COUNTER
+};
- /* Sequencers */
+static const struct etm_reg_info etm_sequencer[] = {
#define SEQ(i) \
{ ETM_SEQUENCER_EVENT + (i), 17, WO, 0x10, \
"ETM_SEQUENCER_EVENT" #i, }
@@ -166,7 +183,9 @@ static const struct etm_reg_info reg[] = {
#undef SEQ
/* 0x66 reserved */
{ ETM_SEQUENCER_STATE, 2, RO, 0x10, "ETM_SEQUENCER_STATE", },
+};
+static const struct etm_reg_info etm_outputs[] = {
#define OUT(i) \
{ ETM_EXTERNAL_OUTPUT + (i), 17, WO, 0x10, \
"ETM_EXTERNAL_OUTPUT" #i, }
@@ -176,6 +195,7 @@ static const struct etm_reg_info reg[] = {
OUT(2),
OUT(3),
#undef OUT
+};
#if 0
/* registers from 0x6c..0x7f were added after ETMv1.3 */
@@ -185,11 +205,7 @@ static const struct etm_reg_info reg[] = {
{ 0x6d, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_VALUE1", }
{ 0x6e, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_VALUE1", }
{ 0x6f, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_MASK", }
-
- { 0x78, 12, WO, 0x20, "ETM_SYNC_FREQ", },
- { 0x79, 32, RO, 0x20, "ETM_ID", },
#endif
-};
static int etm_reg_arch_type = -1;
@@ -224,43 +240,137 @@ static reg_t *etm_reg_lookup(etm_context_t *etm_ctx, unsigned id)
return NULL;
}
+static void etm_reg_add(unsigned bcd_vers, arm_jtag_t *jtag_info,
+ reg_cache_t *cache, etm_reg_t *ereg,
+ const struct etm_reg_info *r, unsigned nreg)
+{
+ reg_t *reg = cache->reg_list;
+
+ reg += cache->num_regs;
+ ereg += cache->num_regs;
+
+ /* add up to "nreg" registers from "r", if supported by this
+ * version of the ETM, to the specified cache.
+ */
+ for (; nreg--; r++) {
+
+ /* this ETM may be too old to have some registers */
+ if (r->bcd_vers > bcd_vers)
+ continue;
+
+ reg->name = r->name;
+ reg->size = r->size;
+ reg->value = &ereg->value;
+ reg->arch_info = ereg;
+ reg->arch_type = etm_reg_arch_type;
+ reg++;
+ cache->num_regs++;
+
+ ereg->reg_info = r;
+ ereg->jtag_info = jtag_info;
+ ereg++;
+ }
+}
+
reg_cache_t *etm_build_reg_cache(target_t *target,
arm_jtag_t *jtag_info, etm_context_t *etm_ctx)
{
reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
reg_t *reg_list = NULL;
etm_reg_t *arch_info = NULL;
- int num_regs = ARRAY_SIZE(reg);
- int i;
+ unsigned bcd_vers, config;
/* register a register arch-type for etm registers only once */
if (etm_reg_arch_type == -1)
- etm_reg_arch_type = register_reg_arch_type(etm_get_reg, etm_set_reg_w_exec);
+ etm_reg_arch_type = register_reg_arch_type(etm_get_reg,
+ etm_set_reg_w_exec);
/* the actual registers are kept in two arrays */
- reg_list = calloc(num_regs, sizeof(reg_t));
- arch_info = calloc(num_regs, sizeof(etm_reg_t));
+ reg_list = calloc(128, sizeof(reg_t));
+ arch_info = calloc(128, sizeof(etm_reg_t));
/* fill in values for the reg cache */
reg_cache->name = "etm registers";
reg_cache->next = NULL;
reg_cache->reg_list = reg_list;
- reg_cache->num_regs = num_regs;
-
- /* set up registers */
- for (i = 0; i < num_regs; i++)
- {
- const struct etm_reg_info *r = reg + i;
-
- reg_list[i].name = r->name;
- reg_list[i].size = r->size;
- reg_list[i].value = &arch_info[i].value;
- reg_list[i].arch_info = &arch_info[i];
- reg_list[i].arch_type = etm_reg_arch_type;
-
- arch_info[i].reg_info = r;
- arch_info[i].jtag_info = jtag_info;
+ reg_cache->num_regs = 0;
+
+ /* add ETM_CONFIG, then parse its values to see
+ * which other registers exist in this ETM
+ */
+ etm_reg_add(0x10, jtag_info, reg_cache, arch_info,
+ etm_core, 1);
+
+ etm_get_reg(reg_list);
+ etm_ctx->config = buf_get_u32((void *)&arch_info->value, 0, 32);
+ config = etm_ctx->config;
+
+ /* figure ETM version then add base registers */
+ if (config & (1 << 31)) {
+ bcd_vers = 0x20;
+ LOG_WARNING("ETMv2+ support is incomplete");
+
+ /* REVISIT read ID register, distinguish ETMv3.3 etc;
+ * don't presume trace start/stop support is present;
+ * and include any context ID comparator registers.
+ */
+ } else {
+ switch (config >> 28) {
+ case 7:
+ case 5:
+ case 3:
+ bcd_vers = 0x13;
+ break;
+ case 4:
+ case 2:
+ bcd_vers = 0x12;
+ break;
+ case 1:
+ bcd_vers = 0x11;
+ break;
+ case 0:
+ bcd_vers = 0x10;
+ break;
+ default:
+ LOG_WARNING("Bad ETMv1 protocol %d", config >> 28);
+ free(reg_cache);
+ free(reg_list);
+ free(arch_info);
+ return ERROR_OK;
+ }
}
+ etm_ctx->bcd_vers = bcd_vers;
+ LOG_INFO("ETM v%d.%d", bcd_vers >> 4, bcd_vers & 0xf);
+
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_core + 1, ARRAY_SIZE(etm_core) - 1);
+
+ /* address and data comparators; counters; outputs */
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_addr_comp, 4 * (0x0f & (config >> 0)));
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_data_comp, 2 * (0x0f & (config >> 4)));
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_counters, 4 * (0x07 & (config >> 13)));
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_outputs, (0x07 & (config >> 20)));
+
+ /* FIFOFULL presence is optional
+ * REVISIT for ETMv1.2 and later, don't bother adding this
+ * unless ETM_SYS_CONFIG says it's also *supported* ...
+ */
+ if (config & (1 << 23))
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_fifofull, ARRAY_SIZE(etm_fifofull));
+
+ /* sequencer is optional (for state-dependant triggering) */
+ if (config & (1 << 16))
+ etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
+ etm_sequencer, ARRAY_SIZE(etm_sequencer));
+
+ /* REVISIT could realloc and likely save half the memory
+ * in the two chunks we allocated...
+ */
/* the ETM might have an ETB connected */
if (strcmp(etm_ctx->capture_driver->name, "etb") == 0)
@@ -271,6 +381,7 @@ reg_cache_t *etm_build_reg_cache(target_t *target,
{
LOG_ERROR("etb selected as etm capture driver, but no ETB configured");
free(reg_cache);
+ free(reg_list);
free(arch_info);
return ERROR_OK;
}
@@ -1362,7 +1473,7 @@ static int handle_etm_info_command(struct command_context_s *cmd_ctx,
target_t *target;
armv4_5_common_t *armv4_5;
arm7_9_common_t *arm7_9;
- reg_t *etm_config_reg;
+ etm_context_t *etm;
reg_t *etm_sys_config_reg;
int max_port_size;
@@ -1375,31 +1486,45 @@ static int handle_etm_info_command(struct command_context_s *cmd_ctx,
return ERROR_OK;
}
- if (!arm7_9->etm_ctx)
+ etm = arm7_9->etm_ctx;
+ if (!etm)
{
command_print(cmd_ctx, "current target doesn't have an ETM configured");
return ERROR_OK;
}
- etm_config_reg = etm_reg_lookup(arm7_9->etm_ctx, ETM_CONFIG);
- if (!etm_config_reg)
- return ERROR_OK;
- etm_sys_config_reg = etm_reg_lookup(arm7_9->etm_ctx, ETM_SYS_CONFIG);
- if (!etm_sys_config_reg)
- return ERROR_OK;
-
- etm_get_reg(etm_config_reg);
- command_print(cmd_ctx, "pairs of address comparators: %i", (int)buf_get_u32(etm_config_reg->value, 0, 4));
- command_print(cmd_ctx, "pairs of data comparators: %i", (int)buf_get_u32(etm_config_reg->value, 4, 4));
- command_print(cmd_ctx, "memory map decoders: %i", (int)buf_get_u32(etm_config_reg->value, 8, 5));
- command_print(cmd_ctx, "number of counters: %i", (int)buf_get_u32(etm_config_reg->value, 13, 3));
+ command_print(cmd_ctx, "ETM v%d.%d",
+ etm->bcd_vers >> 4, etm->bcd_vers & 0xf);
+ command_print(cmd_ctx, "pairs of address comparators: %i",
+ (etm->config >> 0) & 0x0f);
+ command_print(cmd_ctx, "data comparators: %i",
+ (etm->config >> 4) & 0x0f);
+ command_print(cmd_ctx, "memory map decoders: %i",
+ (etm->config >> 8) & 0x1f);
+ command_print(cmd_ctx, "number of counters: %i",
+ (etm->config >> 13) & 0x07);
command_print(cmd_ctx, "sequencer %spresent",
- (buf_get_u32(etm_config_reg->value, 16, 1) == 1) ? "" : "not ");
- command_print(cmd_ctx, "number of ext. inputs: %i", (int)buf_get_u32(etm_config_reg->value, 17, 3));
- command_print(cmd_ctx, "number of ext. outputs: %i",(int) buf_get_u32(etm_config_reg->value, 20, 3));
+ (etm->config & (1 << 16)) ? "" : "not ");
+ command_print(cmd_ctx, "number of ext. inputs: %i",
+ (etm->config >> 17) & 0x07);
+ command_print(cmd_ctx, "number of ext. outputs: %i",
+ (etm->config >> 20) & 0x07);
command_print(cmd_ctx, "FIFO full %spresent",
- (buf_get_u32(etm_config_reg->value, 23, 1) == 1) ? "" : "not ");
- command_print(cmd_ctx, "protocol version: %i", (int)buf_get_u32(etm_config_reg->value, 28, 3));
+ (etm->config & (1 << 23)) ? "" : "not ");
+ if (etm->bcd_vers < 0x20)
+ command_print(cmd_ctx, "protocol version: %i",
+ (etm->config >> 28) & 0x07);
+ else {
+ command_print(cmd_ctx, "trace start/stop %spresent",
+ (etm->config & (1 << 26)) ? "" : "not ");
+ command_print(cmd_ctx, "number of context comparators: %i",
+ (etm->config >> 24) & 0x03);
+ }
+
+ /* SYS_CONFIG isn't present before ETMv1.2 */
+ etm_sys_config_reg = etm_reg_lookup(etm, ETM_SYS_CONFIG);
+ if (!etm_sys_config_reg)
+ return ERROR_OK;
etm_get_reg(etm_sys_config_reg);
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-26 21:14:05 +0000