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https://git.rtems.org/rtems-docs/
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560 lines
17 KiB
ReStructuredText
560 lines
17 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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.. This file is part of the RTEMS quality process and was automatically
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.. generated. If you find something that needs to be fixed or
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.. worded better please post a report or patch to an RTEMS mailing list
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.. or raise a bug report:
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..
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.. https://www.rtems.org/bugs.html
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..
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.. For information on updating and regenerating please refer to the How-To
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.. section in the Software Requirements Engineering chapter of the
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.. RTEMS Software Engineering manual. The manual is provided as a part of
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.. a release. For development sources please refer to the online
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.. documentation at:
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..
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.. https://docs.rtems.org
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.. Generated from spec:/acfg/if/group-classic
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Classic API Configuration
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=========================
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This section describes configuration options related to the Classic API.
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.. Generated from spec:/acfg/if/max-barriers
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.. index:: CONFIGURE_MAXIMUM_BARRIERS
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.. _CONFIGURE_MAXIMUM_BARRIERS:
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CONFIGURE_MAXIMUM_BARRIERS
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--------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_BARRIERS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Barriers that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. Generated from spec:/acfg/if/max-message-queues
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.. index:: CONFIGURE_MAXIMUM_MESSAGE_QUEUES
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.. _CONFIGURE_MAXIMUM_MESSAGE_QUEUES:
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CONFIGURE_MAXIMUM_MESSAGE_QUEUES
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--------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_MESSAGE_QUEUES``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Message Queues that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`. You have to account for the memory used to
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store the messages of each message queue, see
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:ref:`CONFIGURE_MESSAGE_BUFFER_MEMORY`.
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.. Generated from spec:/acfg/if/max-partitions
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.. index:: CONFIGURE_MAXIMUM_PARTITIONS
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.. _CONFIGURE_MAXIMUM_PARTITIONS:
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CONFIGURE_MAXIMUM_PARTITIONS
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----------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_PARTITIONS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Partitions that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. Generated from spec:/acfg/if/max-periods
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.. index:: CONFIGURE_MAXIMUM_PERIODS
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.. _CONFIGURE_MAXIMUM_PERIODS:
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CONFIGURE_MAXIMUM_PERIODS
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-------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_PERIODS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Periods that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. Generated from spec:/acfg/if/max-ports
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.. index:: CONFIGURE_MAXIMUM_PORTS
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.. _CONFIGURE_MAXIMUM_PORTS:
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CONFIGURE_MAXIMUM_PORTS
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-----------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_PORTS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Ports that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. Generated from spec:/acfg/if/max-regions
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.. index:: CONFIGURE_MAXIMUM_REGIONS
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.. _CONFIGURE_MAXIMUM_REGIONS:
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CONFIGURE_MAXIMUM_REGIONS
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-------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_REGIONS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Regions that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. Generated from spec:/acfg/if/max-semaphores
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.. index:: CONFIGURE_MAXIMUM_SEMAPHORES
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.. _CONFIGURE_MAXIMUM_SEMAPHORES:
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CONFIGURE_MAXIMUM_SEMAPHORES
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----------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_SEMAPHORES``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Semaphore that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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In SMP configurations, the size of a Semaphore Control Block depends on the
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scheduler count (see :ref:`ConfigurationSchedulerTable`). The semaphores
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using the :ref:`MrsP` need a ceiling priority per scheduler.
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.. Generated from spec:/acfg/if/max-tasks
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.. index:: CONFIGURE_MAXIMUM_TASKS
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.. _CONFIGURE_MAXIMUM_TASKS:
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CONFIGURE_MAXIMUM_TASKS
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-----------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_TASKS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It shall be small enough so that the task
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stack space calculation carried out by ``<rtems/confdefs.h>`` does not
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overflow an integer of type `uintptr_t <https://en.cppreference.com/w/c/types/integer>`_.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Tasks that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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The calculations for the required memory in the RTEMS Workspace for tasks
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assume that each task has a minimum stack size and has floating point
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support enabled. The configuration option :ref:`CONFIGURE_EXTRA_TASK_STACKS` is used
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to specify task stack requirements *above* the minimum size required.
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The maximum number of POSIX threads is specified by
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:ref:`CONFIGURE_MAXIMUM_POSIX_THREADS`.
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A future enhancement to ``<rtems/confdefs.h>`` could be to eliminate the
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assumption that all tasks have floating point enabled. This would require
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the addition of a new configuration parameter to specify the number of
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tasks which enable floating point support.
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.. Generated from spec:/acfg/if/max-thread-local-storage-size
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.. index:: CONFIGURE_MAXIMUM_THREAD_LOCAL_STORAGE_SIZE
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.. _CONFIGURE_MAXIMUM_THREAD_LOCAL_STORAGE_SIZE:
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CONFIGURE_MAXIMUM_THREAD_LOCAL_STORAGE_SIZE
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-------------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_THREAD_LOCAL_STORAGE_SIZE``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to `SIZE_MAX <https://en.cppreference.com/w/c/types/limits>`_.
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* It shall be an integral multiple of :c:macro:`RTEMS_TASK_STORAGE_ALIGNMENT`.
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DESCRIPTION:
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If the value of this configuration option is greater than zero, then it
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defines the maximum thread-local storage size, otherwise the thread-local
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storage size is defined by the linker depending on the thread-local storage
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objects used by the application in the statically-linked executable.
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NOTES:
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This configuration option can be used to reserve space for the dynamic linking
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of modules with thread-local storage objects.
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If the thread-local storage size defined by the thread-local storage
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objects used by the application in the statically-linked executable is greater
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than a non-zero value of this configuration option, then a fatal error will
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occur during system initialization.
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Use :c:func:`RTEMS_ALIGN_UP` and
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:c:macro:`RTEMS_TASK_STORAGE_ALIGNMENT` to adjust the size to meet the
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minimum alignment requirement of a thread-local storage area.
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The actual thread-local storage size is determined when the application
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executable is linked. The ``rtems-exeinfo`` command line tool included in
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the RTEMS Tools can be used to obtain the thread-local storage size and
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alignment of an application executable.
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.. Generated from spec:/acfg/if/max-timers
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.. index:: CONFIGURE_MAXIMUM_TIMERS
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.. _CONFIGURE_MAXIMUM_TIMERS:
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CONFIGURE_MAXIMUM_TIMERS
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------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_TIMERS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
|
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BSP-specific and application-specific value which depends on the size of the
|
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memory available to the application.
|
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|
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* It may be defined through
|
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
|
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Timers that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. Generated from spec:/acfg/if/max-user-extensions
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.. index:: CONFIGURE_MAXIMUM_USER_EXTENSIONS
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.. _CONFIGURE_MAXIMUM_USER_EXTENSIONS:
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CONFIGURE_MAXIMUM_USER_EXTENSIONS
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---------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_USER_EXTENSIONS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API User Extensions that can be concurrently active.
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NOTES:
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This object class cannot be configured in unlimited allocation mode.
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.. Generated from spec:/acfg/if/min-tasks-with-user-provided-storage
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.. index:: CONFIGURE_MINIMUM_TASKS_WITH_USER_PROVIDED_STORAGE
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.. _CONFIGURE_MINIMUM_TASKS_WITH_USER_PROVIDED_STORAGE:
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CONFIGURE_MINIMUM_TASKS_WITH_USER_PROVIDED_STORAGE
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--------------------------------------------------
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CONSTANT:
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``CONFIGURE_MINIMUM_TASKS_WITH_USER_PROVIDED_STORAGE``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall be greater than or equal to 0
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and less than or equal to :ref:`CONFIGURE_MAXIMUM_TASKS`.
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DESCRIPTION:
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The value of this configuration option defines the minimum count of Classic
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API Tasks which are constructed by :c:func:`rtems_task_construct`.
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NOTES:
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By default, the calculation for the required memory in the RTEMS Workspace
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for tasks assumes that all Classic API Tasks are created by
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:c:func:`rtems_task_create`. This configuration option can be used to
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reduce the required memory for the system-provided task storage areas since
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tasks constructed by :c:func:`rtems_task_construct` use a user-provided
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task storage area.
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