Some updates to the reference page for the "core" APIs, and associated
follow-ups in the guides:
- centralize documentation of chosen zephyr nodes in a non-legacy
file, provide a reference to them from the intro page in the guide
- review doxygen docstrings and correct errors for generic APIs
- add introductory text to each section in the API reference
- add missing hardware-specific pages
Documentation for layers built on top of these is mostly left to future
commits, but I do have a smattering of fixes in the guides that I
noticed while I was doing this.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
The sidebar for User Mode wasn't set up correctly and
it wasn't obvious that there are linked sub-pages with
design details about memory domains, system calls, kernel
objects, and so forth.
Split the introductory material into its own overview
page and set up the table of contents properly.
The text of the threat model, high level policy details,
and constraints sections is unchanged.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
The device structure definition in the code has drifted from the
displayed version in the documentation. Update the documentation to
match.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
The underlying structure is not suitable for use in API invoked from
user threads for the reasons explained in the edit.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Extend the provided template with annotated examples of API based on
whether the functions must be invokable from user mode threads, since
there are currently no in-tree examples of the specific techniques
required.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Several reviewers agreed that DT_HAS_NODE_STATUS_OKAY(...) was an
undesirable API for the following reasons:
- it's inconsistent with the rest of the DT_NODE_HAS_FOO names
- DT_NODE_HAS_FOO_BAR_BAZ(node) was agreed upon as a shorthand
for macros which are equivalent to
DT_NODE_HAS_FOO(node) && DT_NODE_HAS_BAR(node) &&
- DT_NODE_HAS_BAZ(node), and DT_HAS_NODE_STATUS_OKAY is an odd duck
- DT_NODE_HAS_STATUS(..., okay) was viewed as more readable anyway
- it is seen as a somewhat aesthetically challenged name
Replace all users with DT_NODE_HAS_STATUS(..., okay), which is
semantically equivalent.
This is mostly done with sed, but a few remaining cases were done by
hand, along with whitespace, docs, and comment changes. These special
cases include the Nordic SOC static assert files.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Add more HOWTO information for the two current devicetree-based device
instantiation styles, and a bit more information on how to create
devices that depend on others.
Point to this from the Kconfig tips page, since it is meant as a
replacement for existing Kconfig practice.
Update macros.bnf.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
init_fn is not anymore part of struct device, so let's test instead the
driver's API structure pointer which is also unique per device driver.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit renames the Kconfig `FP_SHARING` symbol to `FPU_SHARING`,
since this symbol specifically refers to the hardware FPU sharing
support by means of FPU context preservation, and the "FP" prefix is
not fully descriptive of that; leaving room for ambiguity.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
We have a new heap implementation replacing mem_pool. Add docs on its
API and internals, and add a deprecation note to the mem_pool section.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The recent work with k_timeout_t has invalidated much of the existing
timing documentation. Rewrite the section focusing on the new API,
adding details on the internals and driver-facing API. Includes a
porting guide for legacy applications and subsystems.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Add some documentation and diagrams for OS library data structures:
dlist/slist, rbtree and ring buffer.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The DS3231 is an I2C real-time clock with internal temperature
compensated oscillator, maintaining civil time to 1 s precision with
nominal 2 ppm accuracy from 0-40 Cel.
The basic functionality is exposed as a counter that is always running
at 1 Hz. Much more functionality is exposed as driver-specific API,
including the ability to translate between the time scale of the DS3231
and the time scale of the Zephyr uptime clock. This allows correlation
of events in the system clock to UTC, TAI, or whatever time scale is
used to maintain the DS3231.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Rename DT_HAS_NODE to DT_HAS_NODE_STATUS_OKAY so the semantics are
clear. As going forward DT_HAS_NODE will report if a NODE exists
regardless of its status.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This library supports stream writes to flash with
optinal progressive erase.
This module is a direct copy of the functionality found in
subsys/dfu/img_util/flash_img.c
Signed-off-by: Håkon Øye Amundsen <haakon.amundsen@nordicsemi.no>
We did not have any reference to queues and doxygen information were not
linked correctly. Add a placeholder and pull in doxygen data so whenever
someone adds a reference, a link is created.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Struct members are not always documented in the zephyr online HTML
documentation. Enable it for all Bluetooth related documentation
groups.
Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
This commit renames the Kconfig `FLOAT` symbol to `FPU`, since this
symbol only indicates that the hardware Floating Point Unit (FPU) is
used and does not imply and/or indicate the general availability of
toolchain-level floating point support (i.e. this symbol is not
selected when building for an FPU-less platform that supports floating
point operations through the toolchain-provided software floating point
library).
Moreover, given that the symbol that indicates the availability of FPU
is named `CPU_HAS_FPU`, it only makes sense to use "FPU" in the name of
the symbol that enables the FPU.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This documentation is well-intentioned but not good advice.
The reason why we have a vtable-like API abstraction at the
driver subsystem level is to introduce object orientation.
The subsystem defintions implement an abstract class that
specific driver implementations all implement, providing
a common interface for end users. Multiple drivers may be
written for a subsystem that are interchangeable to the end
user.
However, there is no point in introducing a vtable-like
abstraction for APIs which are specific to a single driver.
We are not trying to present an interface abstraction which
could support multiple implementations. There is just one.
Simply declare a function in a header, and implement it in
the driver's C file.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Rename internal macros to use Z_ prefix instead of _K..
Those macros were missed when we did the global renaming activities.
Fixes#24645
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This change adds full shared floating point support for the RISCV
architecture with minimal impact on threads with floating point
support not enabled.
Signed-off-by: Corey Wharton <coreyw7@fb.com>
The original description for isr-ok allowed the function to return an
error if called from an interrupt context, rather than doing its job.
This led to complex descriptions like "isr-ok but not sleep" to
indicate that the function could be called from thread or interrupt
context without visible behavior changes, including returning an
error based on calling context.
Remove the special terminology for cases where a function returns an
error (rather than causing undefined behavior) when invoked from an
interrupt or pre-kernel. Redefine isr-ok to indicate that the call
does what it's supposed to do regardless of interrupt or thread
context, delegating the description of allowed behaviors to the API
documentation (which should explicitly note when it's allowed to fail
to perform in non-thread context).
This also makes more clear that isr-ok applies to functions regardless
of whether they can cause an invoking thread to context switch.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
The previous architecture proved unable to support user expectations,
so the API has been rebuilt from first principles. Backward
compatibility cannot be maintained for this change.
Key changes include:
* Formerly the service-provided transition functions were allowed to
sleep, and the manager took care to not invoke them from ISR
context, instead returning an error if unable to initiate a
transition. In the new architecture transition functions are
required to work regardless of calling context: it is the service's
responsibility to guarantee the transition will proceed even if it
needs to be transferred to a thread. This eliminates state machine
complexities related to calling context.
* Constants identifying the visible state of the manager are exposed
to clients through both notification callbacks and a new monitor API
that allows clients to be notified of all state changes.
* Formerly the release operation was async, and would be delayed for the
last release to ensure a client would exist to be notified of any
failures. It is now synchronous.
* Formerly the cancel operation would fail on the last client associated
with a transition. The cancel operation is now synchronous.
* A helper function is provided to safely synchronously release a
request regardless of whether it has completed or is in progress,
satisfying the use case underlying #22974.
* The user-data parameter to asynchronous notification callbacks has
been removed as user data can be retrieved from the CONTAINER_OF
the client data.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This adds USB_PID_BLE_HCI_H4_SAMPLE along with it driver which uses H4
over bulk endpoints.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
DAC (digital to analog converter) peripheral driver with a generic API
suitable for most MCUs (only basic DAC features considered).
Signed-off-by: Martin Jäger <martin@libre.solar>
Add a devicetree/zephyr.h header, which is meant to contain
definitions for /chosen properties specific to Zephyr.
Currently, this just deals with zephyr,entropy. We add a
DT_CHOSEN_ZEPHYR_ENTROPY_LABEL macro which expands to the label for the
node pointed to by zephyr,entropy.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
The original API was misnamed, as the intent was to provide a manager
that decoupled state management from the service that needed to be
turned on or off. Update all the names, shortening them where
appropriate removing unncessary internal components like _service.
Also remove some API that misled developers into believing that onoff
managers are normally expected to be exposed directly to consumers.
While this is a use case, in most situations there are service or
client-specific actions that need to be coupled to transition events.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
k_poll() for a signal is often desired for notification of completion
of asynchronous operations, but there are APIs where it may be
necessary to invoke "asynchronous" operations from contexts where
sleep is disallowed, or before the kernel has been initialized.
Extract the general notification solution from the on-off service into
a utility that can be used for other APIs.
Also move documentation out to a resource management section.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Handler functions are now referred to as verification functions,
update documentation to reflect this.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
In order to de-duplicate 2 macros with the same use,
merge BUILD_ASSERT(), BUILD_ASSERT_MSG() into one macro.
Make BUILD_ASSERT_MSG() deprecated.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
Trivial cleanup: sort the devicetree/foo.h includes and the relevant
sections for them in the documentation.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This is joint work with Kumar Gala (see signed-off-by).
Document the changes to the generated node macros in macros.bnf,
moving the old file to legacy-macros.bnf and putting it in its own
section.
The actual generated macros are now a low-level detail, so rewrite the
foregoing sections as examples in terms of the new <devicetree.h> APIs.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This page has a lot more information about APIs than just stability,
and I believe it's currently our only exhaustive list of APIs.
Rename it to API Overview.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
k_cpu_idle() API does not need to be invoked with interrupts
unlocked; it is actually invoked with interrupts locked by
the kernel CPU idling mechanism. In most architectures, the
function is, actually, un-locking interrupts itself. We need
to remove this comment from the documentation of the CPU
idle API. We add a note about the un-locking of interrupts.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This reverts commit 974aa3add4.
Pull Request #23437 was merged by mistake with an invalid manifest.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
In order to de-duplicate 2 macros with the same use,
merge BUILD_ASSERT(), BUILD_ASSERT_MSG() into one macro.
Make BUILD_ASSERT_MSG() deprecated.
Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
Name all subsystem reference consistently with an '_api' postfix and
clean up naming and folder structure in some cases.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
Move the terminology section to its own page in preparation for
additional sections to be addded later.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
This never needed to be put in a separate gperf table.
Privilege mode stacks can be generated by the main
gen_kobject_list.py logic, which we do here.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Private type, internal to the kernel, not directly associated
with any k_object_* APIs. Is the return value of z_object_find().
Rename to struct z_object.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Rather than stuffing various values in a uintptr_t based on
type using casts, use a union for this instead.
No functional difference, but the semantics of the data member
are now much clearer to the casual observer since it is now
formally defined by this union.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This is a copy of rand32_timer.c that uses
z_do_read_cpu_timestamp32() instead of k_cycle_get_32(),
with some logic to ensure different values when called in
rapid succession missing.
Like the other driver, its reported values are not random,
it's a testing generator only.
This appears to have no advantages over rand32_timer.c,
just remove it. In QEMU emulation, the reported TSC values
tend to have the lowest five bits zeroed.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Improve settings example snippet so that it builds and works as
expected. For usability purposes, add print of stored value.
Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>
Added references to missing settings API groups so them
will be generated in documentation build.
Missing API are doxygen subgroup of already referenced doxygen group,
but subgroups aren't automatically extracted to the documentation
output.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
Add detailed documentation for macros that get generated by
gen_defines.py. Covers properties, interrupts, phandle-arrays, clocks,
buses, flash partitions, SPI, etc.
Should be relatively complete now, though there might be overlooked
details.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Co-Authored-By: Kumar Gala <kumar.gala@linaro.org>
Co-Authored-By: Marti Bolivar <marti.bolivar@nordicsemi.no>
Instead of using a custom offloading interface, users can use
`NET_SOCKET_REGISTER` macro to register custom socket API provider. This
solution removes a limitation, that only one offloaded interface can be
registered and that it cannot be used together with native IP stack.
The only exception remainig are DNS releated operations -
`getaddrinfo`/`freeaddrinfo`, which, when offloaded, have to be
registered specifically.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
There are various situations where it's necessary to support turning
devices on or off at runtime, includin power rails, clocks, other
peripherals, and binary device power management. The complexity of
properly managing multiple consumers of a device in a multithreaded
system suggests that a shared implementation is desirable. This
commit provides an API that supports managing on-off resources.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Define a minimal set of attributes that can be used to indicate the
allowed context for invoking specific Zephyr API and kernel functions,
and the effect of invoking them on thread and other behavior.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This term needs to be defined to support documenting the effect of
various API calls on scheduler selection of the running thread.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Introduce the CMake variable SYSCALL_INCLUDE_DIRS to support
out-of-tree syscall declarations.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Patch introduce references to LittleFS instead of NFFS where it
was suitable. In other places NFFS mentions were removed
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
`TLS_PEER_VERIFY` and `TLS_DTLS_ROLE` options accept specific values,
yet no symbols were defined for them. In result, magic numbers were used
in several places, making the code less readable.
Fix this issue, by adding the missing symbols to the `socket.h` header,
and using them in places where related socket options are set.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Add a simple documentation section for the Zero-Latency
IRQs feature supported by the kernel.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Document that the Dynamic Direct interrupts feature is
implemented and supported as an ARM-only API.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The original implementation left this function hidden in init.h which
prevented it from showing up in documentation. Move it to kernel.h,
and document it consistent with the other functions that allow caller
customization based on context.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
We have a collection of python scripts that are part of our build
system. This PR collects docstring comments added to these scripts into
a summary document. Previous references to just the script name in
other documentation are updated to point to this build tool
documentation.
Some of the scripts needed an update to be processed (via include
directives) consistently.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Before introducing the code for ARM64 (AArch64) we need to relocate the
current ARM code to a new AArch32 sub-directory. For now we can assume
that no code is shared between ARM and ARM64.
There are no functional changes. The code is moved to the new location
and the file paths are fixed to reflect this change.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
This commit complements documentation of Zephyr HCI VS
commands. In particular, it documents the newly introduced
commands
- BT_HCI_OP_VS_WRITE_TX_POWER_LEVEL
- BT_HCI_OP_VS_READ_TX_POWER_LEVEL
These provide HCI-level control over the Tx power of the
BLE radio on a per role/connection basis.
The functionality is enabled upon the Kconfig advanced configuration
triggered by
- BT_CTLR_TX_PWR_DYNAMIC_CONTROL
depending on the enablement of Zephyr HCI vendor-specific command
extensions.
Signed-off-by: Andrei Stoica <stoica.razvan.andrei@gmail.com>
Remove leading/trailing blank lines in .c, .h, .py, .rst, .yml, and
.yaml files.
Will avoid failures with the new CI test in
https://github.com/zephyrproject-rtos/ci-tools/pull/112, though it only
checks changed files.
Move the 'target-notes' target in boards/xtensa/odroid_go/doc/index.rst
to get rid of the trailing blank line there. It was probably misplaced.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Adds a deeper hierarchy to the Bluetooth Mesh documentation by moving
the modules in separate pages with a brief description of the concepts
in each module.
Adds the full list of specification defined Health model faults.
Signed-off-by: Trond Einar Snekvik <Trond.Einar.Snekvik@nordicsemi.no>
All states in the thread state diagram were initial-cap except
"suspended". Make it Suspended for consistency.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Removed some cut/paste from mynewt with references to os_callout,
os_event in example snippets.
code examples were also aligned to current settings handle API.
fixes#20743
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
Add a simple block diagram detailing the SMP initialization flow. Not
pretty, but hopefully reasonable.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Documentation about scheduling options was burried in the Kconfig help.
It has better visibility as part of the scheduling section of the main
kernel reference pages.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
One shows how globals are routed for automatic memory
domains. The other illustrates control flow when making
system calls.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Mark the old time conversion APIs deprecated, leave compatibility
macros in place, and replace all usage with the new API.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Promote the private z_arch_* namespace, which specifies
the interface between the core kernel and the
architecture code, to a new top-level namespace named
arch_*.
This allows our documentation generation to create
online documentation for this set of interfaces,
and this set of interfaces is worth treating in a
more formal way anyway.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
We need to pass system call args using a register-width
data type and not hard-code this to u32_t.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
1) Add cryptographically secure random functions to provide
FIPS 140-2 compliant random functions.
2) Add name to random function choice selectors to ease
selection in SOC .defconfig files
3) Add bulk fill random functions.
Signed-off-by: David Leach <david.leach@nxp.com>
This commit allows a more dynamic approach for specifying that a zephyr
library must be placed in a dedicated app memomory partition.
This is still done by defining the partition in code using
K_APPMEM_PARTITION_DEFINE, but now the zephyr library can be added to
the generation of partition table using zephyr_library_app_memory
instead of modifying the overall zephyr/CMakeLists.txt file.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Settings documentation was placed under storage paragraph
in documentation tree, which suggested that it was another
storage solution. In fact settings uses storage modules as
its persistent storage back-end.
This patch creates dedicated run-time configuration paragraph
which aim to explain existence (and emphasize) of common run-time
configuration system in Zephyr-RTOS and rationale for using it.
The Settings paragraph is placed under this paragraph as it is only
sub-module which implements the solution.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
This generic video API can be used to capture/output video frames.
Once a video buffer is enqueued to a video device endpoint, device owns
the buffer and can process to capture (camera), output (disk, display),
convert (hw encoder)... User can then call dequeue to retrieve
the processed buffer (video driver ensure cache coherency).
Once dequeued, video buffer is owned by user (e.g. for frame
processing, display buffer update, write to media, etc...).
For each video-buffer, user needs allocate the associated frame buffer
via video_buffer_alloc. Buffer format is defined by video device
endpoint configuration. Video device can be controlled (e.g. contrast,
brightness, flip...) via controls.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Add documentation for the Websocket API, also add information how
to use the Websocket as a transport for other high level protocols
like MQTT.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit updates the settings backend documentation
to clearly state that it cannot provide old entities
before the final one.
Signed-off-by: Radoslaw Koppel <radoslaw.koppel@nordicsemi.no>
DTSpec writes this as a single word, presumably to make it easier to
grep for / more precise. Follow along in the rest of the docs now that
our main DT docs page agrees with this usage.
Signed-off-by: Marti Bolivar <marti.bolivar@nordicsemi.no>
SMP had API-level docs, but no architecture-level description.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Changed return parameter description from
"@retval filter id on success" to
"@retval filter_id on success".
This change suppresses the doxy warnings.
Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
This commit adds a lot more documentation to the Controller Area
Netwok API. The documentation is move to the networking section.
Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
This commit adds new k_work_poll interface. It allows to
submit given work to a workqueue automatically when one of the
watched pollable objects changes its state.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Add diagram showing the current system power management and the central
method of device power management.
The diagrams were made using draw.io and can be edit using draw.io.y
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Moving all thread docs into 1 page was a bit too much. Split the section
a bit and remove redundant and useless sections and move some thread
related documentation from the scheduling page to threads (thread states
and priorities).
Add a new figure for thread states.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Added CONIFG_LOG_BLOCK_IN_THREAD option to block until buffer for
log message is available. When log message is called in the thread
and there is no buffer available in the pool, thread will block with
configurable timeout (CONFIG_LOG_BLOCK_IN_THREAD_TIMEOUT_MS). If
buffer cannot be allocated by that time, message will be dropped.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
We don't really have docs on how fatal errors are induced
or handled. Provide some documentation that covers:
- Assertions (runtime and build)
- Kernel panic and oops conditions
- Stack overflows
- Other exceptions
- Exception handling policy
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
We now more throroughly discuss memory domains, thread
resource pools, and automatic memory domains.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
System call arguments, at the arch layer, are single words. So
passing wider values requires splitting them into two registers at
call time. This gets even more complicated for values (e.g
k_timeout_t) that may have different sizes depending on configuration.
This patch adds a feature to gen_syscalls.py to detect functions with
wide arguments and automatically generates code to split/unsplit them.
Unfortunately the current scheme of Z_SYSCALL_DECLARE_* macros won't
work with functions like this, because for N arguments (our current
maximum N is 10) there are 2^N possible configurations of argument
widths. So this generates the complete functions for each handler and
wrapper, effectively doing in python what was originally done in the
preprocessor.
Another complexity is that traditional the z_hdlr_*() function for a
system call has taken the raw list of word arguments, which does not
work when some of those arguments must be 64 bit types. So instead of
using a single Z_SYSCALL_HANDLER macro, this splits the job of
z_hdlr_*() into two steps: An automatically-generated unmarshalling
function, z_mrsh_*(), which then calls a user-supplied verification
function z_vrfy_*(). The verification function is typesafe, and is a
simple C function with exactly the same argument and return signature
as the syscall impl function. It is also not responsible for
validating the pointers to the extra parameter array or a wide return
value, that code gets automatically generated.
This commit includes new vrfy/msrh handling for all syscalls invoked
during CI runs. Future commits will port the less testable code.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This fixes some typos. Also fix the meaning of a struct field
where the confusion caused by copy-and-paste from another
field.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Add a table summarizing the key characteristics of each
of the data passing objects.
It is useful for readers to have an overview they can skim without
having to read each section in detail.
Signed-off-by: Marti Bolivar <marti.bolivar@nordicsemi.no>
Splitting these up by area helps make the sidebar a bit easier to
navigate, and will also let us insert additional overview information
about each area.
Signed-off-by: Marti Bolivar <marti.bolivar@nordicsemi.no>
Add a simple diagram on the device driver model.
Instead of saying "this device driver", spell out that the note
is for the random number generator driver, as the visual
presentation does not have clear distinction.
Also update some formatting.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This PR updates the documentation to cover a technical solution to
providing a driver instance that extends the functionality of a
subsystem API. The solution described was mooted in Zephyr PR #17072
and approved by the Technical Steering Committee during its 2019-08-07
meeting.
Relates-to: #11993
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
When init level hierarchy was reworked the documentation was switched to
describe the new levels, but the count of relevant levels was not
changed.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Add information about supported protocols in PPP and link to
net-tools that contains information how to test ppp against
pppd running in Linux.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Code snippets show misleading example of read_callback usage
in h_set handlers.
This patch aligns snippets to implemented behavior.
fixes#15451
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
There had been some changes applied on the API after that documentation
was made. Reflect the API behavior change and correct a minor issue.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Add some diagrams showing the different scheduling algorithms we
support.
The diagrams were made using draw.io and can be edit using draw.io.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit adds a short note in reference/kernel/other/float.
The note instructs to apply pre-tagging of ARM threads to
indicate that they indend to use the FP services.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The first word is used as a pointer, meaning it is 64 bits on 64-bit
systems. To reserve it, it has to be either a pointer, a long, or an
intptr_t. Not an int nor an u32_t.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
The Quark D2000 is the only x86 with an MVIC, and since support for
it has been dropped, the interrupt controller is orphaned. Removed.
Signed-off-by: Charles E. Youse <charles.youse@intel.com>
Found a few annoying typos and figured I better run script and
fix anything it can find, here are the results...
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Clean up some stray references to cmake in doc, boards and
samples that don't make explicit use of the zephyr app extension,
as well as other minor doc fixes.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
The DT spec. only has "okay" and not "ok". The Linux kernel has around
12k "okay"s and 300 "ok"s.
The scripts/dts scripts only check for "disabled", so should be safe re.
those at least.
The replacement was done with
git ls-files | xargs sed -i 's/status\s*=\s*"ok"/status = "okay"/'
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
The k_stack data type cannot be u32_t on a 64-bit system as it is
often used to store pointers. Let's define a dedicated type for stack
data values, namely stack_data_t, which can be adjusted accordingly.
For now it is defined to uintptr_t which is the integer type large
enough to hold a pointer, meaning it is equivalent to u32_t on 32-bit
systems and u64_t on 64-bit systems.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
This commit rewrites the documentation section describing
the Shared FP registers mode for Cortex-M to align with the
latest architecture rework of Shared FP mode.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Added CONFIG_LOG_DETECT_MISSED_STRDUP (by default on) which enables
scanning of log message strings in search for %s and reports if
string address is not from strdup buffer pool and outside read only
memory section which indicates that log_strdup() wrapping is missing
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Do not always print general help for ping cmd. Only if user supplies
'-h' or '--help' command, print information about the parameters.
After this the generated HTML documentation looks better for the
ping command.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Unique PID is required for each sample in order
to be recognized by host.
When creating a new sample:
- Add USB_PID_<SAMPLE_NAME>_SAMPLE
in samples/subsys/usb/usb_pid.Kconfig
- Create Kconfig file in your sample's subdirectory, containing:
config USB_DEVICE_PID
default USB_PID_<SAMPLE_NAME>_SAMPLE
source "Kconfig.zephyr"
Signed-off-by: Marcin Szymczyk <Marcin.Szymczyk@nordicsemi.no>
The approved trademark name is Wi-Fi so update references to WiFi and
other spellings to Wi-Fi in documentation and Kconfig help strings.
(Note that use of spelling variatios of "wifi" in module names, CONFIG
names, link names and such are untouched.)
https://www.wi-fi.org/
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
This commit removes the activation of the FP context
in ARM system boot. There is no need to do this, since
the FP context will be activated in the presence of
floating point instructions. We update the reference
documentation accordingly.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Added macros which can be used to create a command which depends
on compilation flag. Macros are a cleaner alternative to #ifdefs
around command registration and command handler.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Major changes are:
- Expose settings backend API to enable custom backend support.
- Add a new CONFIG_SETTINGS_CUSTOM backend to allow registering a custom
backend.
- Change api of the handlers h_set() routines to allow for
backend-specific read callbacks.
- Provide a customizable settings_backend_init() routine for custom
backends.
- Move runtime settings support to be its own backend.
Signed-off-by: François Delawarde <fnde@oticon.com>
Callbacks called from the RX thread may block, but should avoid doing
it for long periods of time.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Some clarifications to BSD socket descriptions. Also added
rendering hints for some strings.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit brings power management subystem documentation up to date
with the implementation. The main changes since the last time the
documentation was updated include introduction of power managment
policies.
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
There exists SoCs, e.g. STM32L4, where one of the low power modes
reduces CPU frequency and supply voltage but does not stop the CPU. Such
power modes are currently not supported by Zephyr.
To facilitate adding support for such class of power modes in the future
and to ensure the naming convention makes it clear that the currently
supported power modes stop the CPU this commit renames Low Power States
to Slep States and updates the documentation.
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This commit updates the documentation as follows:
- stresses that the lazy stacking preservation is disabled
by default and not supported in ARM Cortex-M builds,
- corrects the figure of extra stack requirement when
floating point services are enabled in ARM builds.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit provides the following fixes:
- Corrects the note regarding which ARM MCUs may support
floating point services
- Rewords the text stressing the undefined behavior when
multiple threads access the floating point registers.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Linking to API material requires knowing the pecularities of how
doxygen, sphinx, and breathe work. In an attempt to hide some of this
we're preparing the current docs to allow use of configuration defaults
that will let us more simply use a default role that will hunt for a
reference target in the various domains that are available by using a
default "role" of "all". This will let us use the simple notation
`functionname` or `typename` without fully specifying the reference as
:c:func:`functionname`.
This patch cleans up exising docs that were (incorrectly) using single
backtics where double backtics should have been used, and also found
some typos (such as a space between the role name and the reference,
such as :file: `filename`, and a missing colon such as
c:func:`functionname`)
This is a start to address issue #14313
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Add framework for device Idle Power Management(IPM)
for suspending devices based on device idle. This will
help in saving power even while system(CPU) is active.
The framework uses device_set_power_state() API set the
device power state accordingly based on the usage count.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
The existing device_set_power_state() API works only in synchronous
mode and this is not desirable for devices(ex: Gyro) which take
longer time (few 100 mSec) to suspend/resume.
To support async mode, a new callback argument is added to the API.
The device drivers can asynchronously suspend/resume and call the
callback function upon completion of the async request.
This commit adds the missing callback parameter to all the drivers
to make it compliant with the new API.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Use proper link to Zephyr source files. Fix rendering of special
options like NET_OK, NET_DROP and NET_CONTINUE.
Add reference links to network technologies documents.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
In case of early crash, shell will not output logs. Added
documentation explaining how to handle such situations.
It is recommended to enable simple logger backend (RTT, UART)
which are available earlier.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
The architecture document contained old information and is now
updated to match the reality.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
A new role :zephyr_file: is available that renders to a link to the file
or folder in GitHub. Find appropriate references using :file: and
convert to :zephyr_file: to take advantage of its linking capability.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
The VLAN documentation had double wording and proper links to files
in github was missing, which did not look good in the rendered HTML
page.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Fix link to DNS Kconfig option. Add proper links to DNS files
in github. Fixed link to DNS sample application.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
The L2 documentation was describing functionality that has changed
recently. Now it should match the current reality.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The Link Layer Discovery Protocol chapter was missing Overview
and also the API reference was not populated properly.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Adding OpenAVnu/gptp and linuxptp links to the doc.
Also the "Application interfaces" chapter had some style issues.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
The phrase 'low power state' is often incorrectly used to indicate
'low power' or 'deep sleep' states. This commit fixes the ambiguities
by renaming 'low power state' to 'power state' where necessary.
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
CPU_LPS_n name used to indicate a low power state is cryptic and
incorrect. The low power states act on the whole SoC and not exclusively
on the CPU. This patch renames CPU_LPS_n states to LOW_POWER_n. Also
HAS_ pattern for Kconfig options is used in favor of a non standard
_SUPPORTED. Naming of deep sleep states was adjusted accordingly.
Following is a detailed list of string replacements used:
s/SYS_POWER_STATE_CPU_LPS_(\d)_SUPPORTED/HAS_STATE_LOW_POWER_$1/
s/SYS_POWER_STATE_CPU_LPS_(\d)/SYS_POWER_STATE_LOW_POWER_$1/
s/SYS_POWER_STATE_DEEP_SLEEP_(\d)_SUPPORTED/HAS_STATE_DEEP_SLEEP_$1/
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This is an integral part of userspace and cannot be used
on its own. Fold into the main userspace configuration.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
