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237483aa5c
This driver adds support for the STM CoreSight IP block, allowing any system compoment (HW or SW) to log and aggregate messages via a single entity. The CoreSight STM exposes an application defined number of channels called stimulus port. Configuration is done using entries in sysfs and channels made available to userspace via configfs. Signed-off-by: Pratik Patel <pratikp@codeaurora.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Michael Williams <michael.williams@arm.com> Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
21 lines
611 B
C
21 lines
611 B
C
#ifndef __UAPI_CORESIGHT_STM_H_
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#define __UAPI_CORESIGHT_STM_H_
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#define STM_FLAG_TIMESTAMPED BIT(3)
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#define STM_FLAG_GUARANTEED BIT(7)
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/*
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* The CoreSight STM supports guaranteed and invariant timing
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* transactions. Guaranteed transactions are guaranteed to be
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* traced, this might involve stalling the bus or system to
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* ensure the transaction is accepted by the STM. While invariant
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* timing transactions are not guaranteed to be traced, they
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* will take an invariant amount of time regardless of the
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* state of the STM.
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*/
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enum {
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STM_OPTION_GUARANTEED = 0,
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STM_OPTION_INVARIANT,
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};
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#endif
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