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SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
appl-config-option-type: integer
copyrights:
- Copyright (C) 2022 embedded brains GmbH (http://www.embedded-brains.de)
default-value: |
This configuration option has no default value. If it is not specified, then
the task storage area for each ${/glossary/idletask:/term} will allocated
from the RTEMS Workspace or through a custom IDLE task stack allocator.
description: |
If this configuration option is specified, then the task storage areas for
the ${/glossary/idletask:/plural} are statically allocated by
${header-confdefs:/path}. The value of this configuration option defines the
size in bytes of the task storage area of each IDLE task in the system.
enabled-by: true
index-entries:
- IDLE task storage size
interface-type: appl-config-option
links:
- role: interface-placement
uid: domain
- role: interface-ingroup
uid: group-idle
- role: constraint
uid: ../constraint/idle-task-min-stack-size
name: CONFIGURE_IDLE_TASK_STORAGE_SIZE
notes: |
By default, the IDLE task storage areas are allocated from the RTEMS
Workspace. Applications which do not want to use a heap allocator can use
this configuration option to use statically allocated memory for the IDLE
task storage areas. The task storage area contains the task stack, the
thread-local storage, and the floating-point context on architectures with a
separate floating-point context. The size of the thread-local storage area
is defined at link time or by the ${max-thread-local-storage-size:/name}
configuration option. You have to estimate the actual thread-local storage
size if you want to use this configuration option. If the IDLE task stack
size would be less than the value defined by the
${idle-task-stack-size:/name} configuration option, for example because the
thread-local storage size is larger than expected, then the system terminates
with the ${/score/interr/if/internal-error-core:/name} fatal source and the
${/score/interr/if/idle-thread-stack-too-small:/name} fatal code during
system initialization.
The value of this configuration option is passed to
${/rtems/task/if/storage-size:/name} by ${header-confdefs:/path} to determine
the actual size of the statically allocated area to take
architecture-specific overheads into account.
The
* ``CONFIGURE_IDLE_TASK_STORAGE_SIZE``, and
* ${task-stack-allocator-for-idle:/name}
configuration options are mutually exclusive.
type: interface
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