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https://github.com/zephyrproject-rtos/zephyr
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818a2e2975
Add a generic API for drivers to start workqueues and submit work items. This is needed by drivers which need to schedule code that might sleep from an ISR to run in fiber context. Also add the option to start a system-wide workqueue. Both additions are optional. They can be deactivated for systems that do not need them. Change-Id: Ia843568fde5daf6d4279ef7bf241c26c1e3dcfb7 Signed-off-by: Vlad Dogaru <vlad.dogaru@intel.com>
145 lines
4.0 KiB
Plaintext
145 lines
4.0 KiB
Plaintext
# Kconfig - nanokernel configuration options
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#
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# Copyright (c) 2014-2015 Wind River Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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menu "Nanokernel Options"
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config BOOT_BANNER
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bool
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prompt "Boot banner"
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default n
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select PRINTK
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depends on EARLY_CONSOLE
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help
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This option outputs a banner to the console device during boot up. It
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also embeds a date & time stamp in the kernel and in each USAP image.
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config BUILD_TIMESTAMP
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bool
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prompt "Build Timestamp"
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help
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Build timestamp and add it to the boot banner.
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config INT_LATENCY_BENCHMARK
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bool
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prompt "Interrupt latency metrics [EXPERIMENTAL]"
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default n
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depends on ARCH="x86"
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help
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This option enables the tracking of interrupt latency metrics;
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the exact set of metrics being tracked is platform-dependent.
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Tracking begins when int_latency_init() is invoked by an application.
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The metrics are displayed (and a new sampling interval is started)
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each time int_latency_show() is called thereafter.
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config MAIN_STACK_SIZE
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int
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prompt "Background task stack size (in bytes)"
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default 1024
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help
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This option specifies the size of the stack used by the kernel's
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background task, whose entry point is main().
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config ISR_STACK_SIZE
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int
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prompt "ISR and initialization stack size (in bytes)"
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default 2048
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help
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This option specifies the size of the stack used by interrupt
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service routines (ISRs), and during nanokernel initialization.
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config THREAD_CUSTOM_DATA
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bool
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prompt "Task and fiber custom data"
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default n
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help
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This option allows each task and fiber to store 32 bits of custom data,
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which can be accessed using the sys_thread_custom_data_xxx() APIs.
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config NANO_TIMEOUTS
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bool
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prompt "Enable timeouts on nanokernel objects"
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default n
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depends on SYS_CLOCK_EXISTS
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help
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Allow fibers and tasks to wait on nanokernel objects with a timeout, by
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enabling the nano_xxx_wait_timeout APIs, and allow fibers to sleep for a
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period of time, by enabling the fiber_sleep API.
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config NANO_TIMERS
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bool
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prompt "Enable nanokernel timers"
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default y if NANOKERNEL
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default n
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depends on SYS_CLOCK_EXISTS
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help
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Allow fibers and tasks to wait on nanokernel timers, which can be
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accessed using the nano_timer_xxx() APIs.
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config NANOKERNEL_TICKLESS_IDLE_SUPPORTED
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bool
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default n
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help
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To be selected by an architecture if it does support tickless idle in
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nanokernel systems.
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config ERRNO
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bool
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prompt "Enable errno support"
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default y
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help
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Enable per-thread errno in the kernel. Application and library code must
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include errno.h provided by the C library (libc) to use the errno symbol.
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The C library must access the per-thread errno via the _get_errno() symbol.
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config ATOMIC_OPERATIONS_C
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bool
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default n
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help
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Use atomic operations routines that are implemented entirely
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in C by locking interrupts. Selected by architectures which either
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do not have support for atomic operations in their instruction
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set, or haven't been implemented yet during bring-up.
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config NANO_WORKQUEUE
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bool "Enable nano workqueue support"
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default n
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help
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Nano workqueues allow scheduling work items to be executed in a fiber
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context. Typically such work items are scheduled from ISRs, when the
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work cannot be executed in interrupt context.
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config SYSTEM_WORKQUEUE
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bool "Start a system workqueue"
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default y
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depends on NANO_WORKQUEUE
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help
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Start a system-wide nano_workqueue that can be used by any system
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component.
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config SYSTEM_WORKQUEUE_STACK_SIZE
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int "System workqueue stack size"
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default 1024
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depends on SYSTEM_WORKQUEUE
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config SYSTEM_WORKQUEUE_PRIORITY
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int "System workqueue priority"
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default 10
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depends on SYSTEM_WORKQUEUE
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endmenu
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