@@ -6,6 +6,7 @@
* Copyright (C) 2014 Sony Mobile Communications AB
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*/
+#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
@@ -15,6 +16,8 @@
#include <linux/remoteproc.h>
#include "qcom_q6v5.h"
+#define Q6V5_PANIC_DELAY_MS 200
+
/**
* qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start
* @q6v5: reference to qcom_q6v5 context to be reinitialized
@@ -162,6 +165,22 @@ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5)
}
EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);
+/**
+ * qcom_q6v5_panic() - panic handler to invoke a stop on the remote
+ * @q6v5: reference to qcom_q6v5 context
+ *
+ * Set the stop bit and sleep in order to allow the remote processor to flush
+ * its caches etc for post mortem debugging.
+ */
+void qcom_q6v5_panic(struct qcom_q6v5 *q6v5)
+{
+ qcom_smem_state_update_bits(q6v5->state,
+ BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
+
+ mdelay(Q6V5_PANIC_DELAY_MS);
+}
+EXPORT_SYMBOL_GPL(qcom_q6v5_panic);
+
/**
* qcom_q6v5_init() - initializer of the q6v5 common struct
* @q6v5: handle to be initialized
@@ -42,5 +42,6 @@ int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5);
int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5);
int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5);
int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout);
+void qcom_q6v5_panic(struct qcom_q6v5 *q6v5);
#endif
Add a common panic handler that invokes a stop request and sleep enough to let the remoteproc flush it's caches etc in order to aid post mortem debugging. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> --- drivers/remoteproc/qcom_q6v5.c | 19 +++++++++++++++++++ drivers/remoteproc/qcom_q6v5.h | 1 + 2 files changed, 20 insertions(+) -- 2.18.0