SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
appl-config-option-type: integer
constraints: {}
copyrights:
- Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
default-value: |
  The default value is ${bsp-interrupt-stack-size:/name} in case it is defined,
  otherwise the default value is ${../impl/cpu/stack-minimum-size:/name}.
description: |
  The value of this configuration option defines the size of an interrupt stack
  in bytes.
enabled-by: true
index-entries:
- interrupt stack size
interface-type: appl-config-option
links:
- role: appl-config-group-member
  uid: group-general
- role: constraint
  uid: constraint-isrstackalign
- role: constraint
  uid: constraint-isrstackarea
- role: constraint
  uid: constraint-bspappmin
name: CONFIGURE_INTERRUPT_STACK_SIZE
notes: |
  There is one interrupt stack available for each configured processor
  (${max-processors:/name}).  The interrupt stack areas are
  statically allocated in a special linker section (``.rtemsstack.interrupt``).
  The placement of this linker section is BSP-specific.

  Some BSPs use the interrupt stack as the initialization stack which is used
  to perform the sequential system initialization before the multithreading
  is started.

  The interrupt stacks are covered by the stack checker, see
  ${stack-checker-enabled:/name}.  However, using a too small interrupt stack
  size may still result in undefined behaviour.

  In releases before RTEMS 5.1 the default value was
  ${min-task-stack-size:/name} instead of
  ${../impl/cpu/stack-minimum-size:/name}.
text: ''
type: interface