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List:       linux-doc
Subject:    [PATCH V5 11/26] coresight: etm3x: changing default trace configuration
From:       Mathieu Poirier <mathieu.poirier () linaro ! org>
Date:       2015-11-30 2:14:32
Message-ID: 1448849687-5724-12-git-send-email-mathieu.poirier () linaro ! org
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Changing default configuration to include the entire address
range rather than just the kernel.  That way traces are more
inclusive and it is easier to narrow down if needed.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 drivers/hwtracing/coresight/coresight-etm.h   |  2 ++
 drivers/hwtracing/coresight/coresight-etm3x.c | 29 ++++++++++++---------------
 2 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm.h \
b/drivers/hwtracing/coresight/coresight-etm.h index a8663780a908..f01862fc98dd 100644
--- a/drivers/hwtracing/coresight/coresight-etm.h
+++ b/drivers/hwtracing/coresight/coresight-etm.h
@@ -146,6 +146,7 @@
  * @startstop_ctrl: setting for register ETMTSSCR.
  * @enable_event: setting for register ETMTEEVR.
  * @enable_ctrl1: setting for register ETMTECR1.
+ * @enable_ctrl2: setting for register ETMTECR2.
  * @fifofull_level: setting for register ETMFFLR.
  * @addr_idx:	index for the address comparator selection.
  * @addr_val:	value for address comparator register.
@@ -179,6 +180,7 @@ struct etm_config {
 	u32				startstop_ctrl;
 	u32				enable_event;
 	u32				enable_ctrl1;
+	u32				enable_ctrl2;
 	u32				fifofull_level;
 	u8				addr_idx;
 	u32				addr_val[ETM_MAX_ADDR_CMP];
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c \
b/drivers/hwtracing/coresight/coresight-etm3x.c index a0252ffb4ba7..cfaf8e840bd6 \
                100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -608,26 +608,23 @@ static void etm_init_arch_data(void *info)
 
 static void etm_init_default_data(struct etm_config *config)
 {
-	u32 flags = (1 << 0 | /* instruction execute*/
-		     3 << 3 | /* ARM instruction */
-		     0 << 5 | /* No data value comparison */
-		     0 << 7 | /* No exact mach */
-		     0 << 8 | /* Ignore context ID */
-		     0 << 10); /* Security ignored */
-
 	if (WARN_ON_ONCE(!config))
 		return;
 
-	config->ctrl = (ETMCR_CYC_ACC | ETMCR_TIMESTAMP_EN);
-	config->enable_ctrl1 = ETMTECR1_ADDR_COMP_1;
-	config->addr_val[0] = (u32) _stext;
-	config->addr_val[1] = (u32) _etext;
-	config->addr_acctype[0] = flags;
-	config->addr_acctype[1] = flags;
-	config->addr_type[0] = ETM_ADDR_TYPE_RANGE;
-	config->addr_type[1] = ETM_ADDR_TYPE_RANGE;
-
 	etm_set_default(config);
+
+	/*
+	 * Taken verbatim from the TRM:
+	 *
+	 * To trace all memory:
+	 *  set bit [24] in register 0x009, the ETMTECR1, to 1
+	 *  set all other bits in register 0x009, the ETMTECR1, to 0
+	 *  set all bits in register 0x007, the ETMTECR2, to 0
+	 *  set register 0x008, the ETMTEEVR, to 0x6F (TRUE).
+	 */
+	config->enable_ctrl1 = BIT(24);
+	config->enable_ctrl2 = 0x0;
+	config->enable_event = ETM_HARD_WIRE_RES_A;
 }
 
 static void etm_init_trace_id(struct etm_drvdata *drvdata)
-- 
2.1.4

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