| # Kconfig - nanokernel configuration options |
| |
| # |
| # Copyright (c) 2014-2015 Wind River Systems, Inc. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| menu "Nanokernel Options" |
| |
| config BOOT_BANNER |
| bool |
| prompt "Boot banner" |
| default n |
| select PRINTK |
| help |
| This option outputs a banner to the console device during boot up. It |
| also embeds a date & time stamp in the kernel and in each USAP image. |
| |
| config INT_LATENCY_BENCHMARK |
| bool |
| prompt "Interrupt latency metrics [EXPERIMENTAL]" |
| default n |
| depends on ARCH="x86" |
| help |
| This option enables the tracking of interrupt latency metrics; |
| the exact set of metrics being tracked is platform-dependent. |
| Tracking begins when int_latency_init() is invoked by an application. |
| The metrics are displayed (and a new sampling interval is started) |
| each time int_latency_show() is called thereafter. |
| |
| config MAIN_STACK_SIZE |
| int |
| prompt "Background task stack size (in bytes)" |
| default 1024 |
| help |
| This option specifies the size of the stack used by the kernel's |
| background task, whose entry point is main(). |
| |
| config ISR_STACK_SIZE |
| int |
| prompt "ISR and initialization stack size (in bytes)" |
| default 2048 |
| help |
| This option specifies the size of the stack used by interrupt |
| service routines (ISRs), and during nanokernel initialization. |
| |
| config THREAD_CUSTOM_DATA |
| bool |
| prompt "Task and fiber custom data" |
| default n |
| help |
| This option allows each task and fiber to store 32 bits of custom data, |
| which can be accessed using the sys_thread_custom_data_xxx() APIs. |
| |
| config NANO_TIMEOUTS |
| bool |
| prompt "Enable timeouts on nanokernel objects" |
| default n |
| depends on SYS_CLOCK_EXISTS |
| help |
| Allow fibers and tasks to wait on nanokernel objects with a timeout, by |
| enabling the nano_xxx_wait_timeout APIs, and allow fibers to sleep for a |
| period of time, by enabling the fiber_sleep API. |
| |
| config NANO_TIMERS |
| bool |
| prompt "Enable nanokernel timers" |
| default y if NANOKERNEL |
| default n |
| depends on SYS_CLOCK_EXISTS |
| help |
| Allow fibers and tasks to wait on nanokernel timers, which can be |
| accessed using the nano_timer_xxx() APIs. |
| |
| config NANOKERNEL_TICKLESS_IDLE_SUPPORTED |
| bool |
| default n |
| help |
| To be selected by an architecture if it does support tickless idle in |
| nanokernel systems. |
| |
| config ERRNO |
| bool |
| prompt "Enable errno support" |
| default y |
| help |
| Enable per-thread errno in the kernel. Application and library code must |
| include errno.h provided by the C library (libc) to use the errno symbol. |
| The C library must access the per-thread errno via the _get_errno() symbol. |
| |
| endmenu |