Bool symbols implicitly default to 'n'.
A 'default n' can make sense e.g. in a Kconfig.defconfig file, if you
want to override a 'default y' on the base definition of the symbol. It
isn't used like that on any of these symbols though.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Considering the case of call of printk, interrupt and
other cases, adjust the privileged stack size of arc to
384 bytes to avoid the the overflow of privileged stack.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
This commit gets rid of the 'option env="ENV_VAR"' bounce symbols.
"$FOO" now expands directly to the value of the environment variable
FOO, instead of to the value of the Kconfig symbol FOO.
This change is likely to soon appear in the C tools as well. Those
'option env' symbols always seemed kinda pointless, and have broken
dependency handling due to forcing symbol evaluation during parsing,
before all the symbols have even been seen.
Compatibility with the C tools could be retained by naming all
'option env' symbols the same as the environment variable they
reference.
This commit also updated the Zephyr documentation to explain the new
behavior. It's relevant for $ZEPHYR_BASE and out-of-tree Kconfig
extensions.
Commit message from Kconfiglib (cbf32e29a130d)
==============================================
Make "$FOO" directly reference the environment variable $FOO in e.g.
'source' statements, instead of the symbol FOO. Use os.path.expandvars()
to expand strings (which preserves "$FOO" as-is if no environment
variable FOO exists).
This gets rid of the 'option env' "bounce" symbols, which are mostly
just spam and are buggy in the C tools (dependencies aren't always
respected, due to parsing and evaluation getting mixed up). The same
change will probably appear soon in the C tools as well.
Keep accepting 'option env' to preserve some backwards compatibility,
but ignore it when expanding strings. For compatibility with the C
tools, bounce symbols will need to be named the same as the environment
variables they reference (which is the case for the Linux kernel).
This is a compatibility break, so the major version will be bumped to 6
at the next release.
The main motivation for adding this now is to allow recording properties
on each MenuNode in a clean way. 'option env' symbols interact badly
with delayed dependency propagation.
Side note: I have a feeling that recording environment variable values
might be redundant to trigger rebuilds if sync_deps() is run at each
compile. It should detect all changes to symbol values due to
environment variables changing value.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Dynamic kernel objects no longer is hard-coded to use the kernel
heap. Instead, objects will now be drawn from the calling thread's
resource pool.
Since we now have a reference counting mechanism, if an object
loses all its references and it was dynamically allocated, it will
be automatically freed.
A parallel dlist is added for efficient iteration over the set of
all dynamic objects, allowing deletion during iteration.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Until now, Zephyr has used a patched Kconfiglib that turns 'source' into
a globbing source (by replacing 'source' with 'gsource' at the token
level). There's two problems with this:
- The patch needs to be maintained separately
- Misspelled filenames are silently ignored, as they look like glob
patterns that don't match anything
Fix it as follows:
1. Replace all 'source' statements that use wildcards with 'gsource'
2. Remove the custom Kconfiglib patch so that 'source' no longer globs
The sed pattern '/source.*[*?]/s/source/gsource/' was run over all
Kconfig* files to do the replacement.
source's that use environment variables that might contain glob patterns
were manually changed to gsource.
Building the docs in doc/ is a good test, as doc/Makefile deliberately
sets the environment variables to glob up as many Kconfig files as
possible.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
"depends on" cannot use expressions as arguments, this statement
didn't actually do anything for kconfiglib.py and caused an
error with menuconfig.
There's currently no way to depend on a system heap being
present, however forthcoming patches move this feature away
from using the system heap anyway.
For now, if the user enables dynamic objects without defining
a system heap, they will get a build error.
Fixes#7266.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
A red-black tree is maintained containing the metadata for all
dynamically created kernel objects, which are allocated out of the
system heap.
Currently, k_object_alloc() and k_object_free() are supervisor-only.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Now that all ARC SoCs we can remove code associated with !HAS_DTS and
select HAS_DTS at the architecture level.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This was previously just a #define in one header file, but we need
this expressed in Kconfig space in case some feature only works
properly with downward-growing stacks.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Keyword FLASH_HAS_PAGE_LAYOUT is related to flash and should
be declared in its Kconfig.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
Fix Kconfig help sections and add spacing to be consistent across all
Kconfig file. In a previous run we missed a few.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This patch adds the generation and incorporation of privileged stack
regions that are used by ARM user mode threads. This patch adds the
infrastructure for privileged stacks. Later patches will utilize the
generated stacks and helper functions.
Signed-off-by: Chunlin Han <chunlin.han@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This patch adds application data section alignment constraints
to match the region definition requirements for ARM MPUs. Most MPUs
require a minimum of 32 bytes of alignment for any regions, but some
require power of two alignment to the size of a region.
This requires that the linker align the application data section to
the size of the section. This requires a linker pass to determine the
size. Once this is accomplished the correct value is added to a linker
include file that is utilized in subsequent linker operations.
Signed-off-by: Andy Gross <andy.gross@linaro.org>
When Kconfiglib was introduced it caused a significant performance
issue. This patch uses pruning to mitigate the performance issue.
The pruning exploits the fact that before the Kconfig database is
parsed we already know what ARCH and BOARD has been selected. So in
theory we could prune away all Kconfig sources that are not related to
the current ARCH or BOARD. In practice, it is only the Kconfig sources
in zephyr/arch/$ARCH and zephyr/board/$ARCH/ that are easy to prune.
Still, that is quite a few Kconfig sources. For qemu_x86 this patch
reduced the number of parsed Kconfig source files from 632 to
272. This pruning resulted in a incremental reconfiguration (time
cmake ..) speedup of 21% (0.56s to 0.46) and a clean build speedup of
4% (Using board qemu_x86 and sample hello_world).
Furthermore, it should be easier to maintain ARCH's and BOARD's
out-of-tree since the user now has a mechanism to redirect where
Kconfig sources are found. But this has not been explored.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
A new arch (posix) which relies on pthreads to emulate the context
switching
A new soc for it (inf_clock) which emulates a CPU running at an
infinely high clock (so when the CPU is awaken it runs till completion
in 0 time)
A new board, which provides a trivial system tick timer and
irq generation.
Origin: Original
Fixes#1891
Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Was ARM specific and could not be used by other architectures.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>
Some drivers doesn't implement flash API page layout extension
which is causing the application crash once the API was calling.
This patch introduce system termination for this in those drivers
which doesn't implement extension. This will help to discover this
problem early.
It is not done by preprocessor check because it is possible to have
enabled a driver which support and a driver which doesn't support
this API simultaneously.
Now FLASH_PAGE_LAYOUT configuration option is accessible only in case
that at last one driver which implements mentioned API is enabled.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
This is intended for memory-constrained systems and will save
4K per thread, since we will no longer reserve room for or
activate a kernel stack guard page.
If CONFIG_USERSPACE is enabled, stack overflows will still be
caught in some situations:
1) User mode threads overflowing stack, since it crashes into the
kernel stack page
2) Supervisor mode threads overflowing stack, since the kernel
stack page is marked non-present for non-user threads
Stack overflows will not be caught:
1) When handling a system call
2) When the interrupt stack overflows
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This adds CONFIG_EXECUTE_XOR_WRITE, which is enabled by default on
systems that support controlling whether a page can contain executable
code. This is also known as W^X[1].
Trying to add a memory domain with a page that is both executable and
writable, either for supervisor mode threads, or for user mode threads,
will result in a kernel panic.
There are few cases where a writable page should also be executable
(JIT compilers, which are most likely out of scope for Zephyr), so an
option is provided to disable the check.
Since the memory domain APIs are executed in supervisor mode, a
determined person could bypass these checks with ease. This is seen
more as a way to avoid people shooting themselves in the foot.
[1] https://en.wikipedia.org/wiki/W%5EX
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Indicate to users that this feature isn't fully baked yet.
This will be reverted for 1.11 release.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Userspace is built on top of hardware stack protection and assumes
it is there. We can't enable this unless ARCH_HAS_USERSPACE is defined
anyway.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Fix misspellings in Kconfig help text and made spelling of
RX and TX consistent (from reviewer comments)
Change-Id: Ie9d4c3863cd210e7a17b50a85a7e64156b6bf3d7
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
If this is set incorrectly things will break all over the place.
Needs a default defined per-arch and left alone.
Change-Id: I3f8c842937a240297ee21589a22a7a9e51dbdfad
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Added arch sub folder, make files and Kconfig files for a set of standard SoCs.
Change-Id: I4ee9cba966860072e55c95795d87356b665e4d49
Signed-off-by: Mazen NEIFER <mazen@nestwave.com>
This is a new mechanism for generating interrupt tables which will
be useful on many architectures. It replaces the old linker-based
mechanism for creating these tables and has a couple advantages:
1) It is now possible to use enums as the IRQ line argument to
IRQ_CONNECT(), which should ease CMSIS integration.
2) The vector table itself is now generated, which lets us place
interrupts directly into the vector table without having to
hard-code them. This is a feature we have long enjoyed on x86
and will enable 'direct' interrupts.
3) More code is common, requiring less arch-specific code to
support.
This patch introduces the common code for this mechanism. Follow-up
patches will enable it on various arches.
Issue: ZEP-1038, ZEP-1165
Change-Id: I9acd6e0de8b438fa9293f2e00563628f7510168a
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This flag is no longer necessary and TICKLESS_IDLE will be
enabled by default if SYS_POWER_MANAGEMENT is enabled.
Jira: ZEP-1325
Change-Id: Ic6cd4b8dc0a17c6a413cabf6509b215a4558318d
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
Replace the existing Apache 2.0 boilerplate header with an SPDX tag
throughout the zephyr code tree. This patch was generated via a
script run over the master branch.
Also updated doc/porting/application.rst that had a dependency on
line numbers in a literal include.
Manually updated subsys/logging/sys_log.c that had a malformed
header in the original file. Also cleanup several cases that already
had a SPDX tag and we either got a duplicate or missed updating.
Jira: ZEP-1457
Change-Id: I6131a1d4ee0e58f5b938300c2d2fc77d2e69572c
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
RISC-V is an open-source instruction set architecture.
Added support for the 32bit version of RISC-V to Zephyr.
1) exceptions/interrupts/faults are handled at the architecture
level via the __irq_wrapper handler. Context saving/restoring
of registers can be handled at both architecture and SOC levels.
If SOC-specific registers need to be saved, SOC level needs to
provide __soc_save_context and __soc_restore_context functions
that shall be accounted by the architecture level, when
corresponding config variable RISCV_SOC_CONTEXT_SAVE is set.
2) As RISC-V architecture does not provide a clear ISA specification
about interrupt handling, each RISC-V SOC handles it in its own
way. Hence, at the architecture level, the __irq_wrapper handler
expects the following functions to be provided by the SOC level:
__soc_is_irq: to check if the exception is the result of an
interrupt or not.
__soc_handle_irq: handle pending IRQ at SOC level (ex: clear
pending IRQ in SOC-specific IRQ register)
3) Thread/task scheduling, as well as IRQ offloading are handled via
the RISC-V system call ("ecall"), which is also handled via the
__irq_wrapper handler. The _Swap asm function just calls "ecall"
to generate an exception.
4) As there is no conventional way of handling CPU power save in
RISC-V, the default nano_cpu_idle and nano_cpu_atomic_idle
functions just unlock interrupts and return to the caller, without
issuing any CPU power saving instruction. Nonetheless, to allow
SOC-level to implement proper CPU power save, nano_cpu_idle and
nano_cpu_atomic_idle functions are defined as __weak
at the architecture level.
Change-Id: I980a161d0009f3f404ad22b226a6229fbb492389
Signed-off-by: Jean-Paul Etienne <fractalclone@gmail.com>
rename NANOKERNEL_TICKLESS_IDLE_SUPPORTED to
TICKLESS_IDLE_SUPPORTED and remove nanokernel occurances in Kconfig
files.
Make TICKLESS_IDLE depend on hardware that supports it.
Change-Id: I6a2e4fb0f7cf4b45475b48e71823ea089ee98759
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
For very constrained systems, like bootloaders.
Only the main thread is available, so a main() function must be
provided. Kernel objects where pending is in play will not behave as
expected, since the main thread cannot pend, it being the only thread in
the system. Usage of objects should be limited to using K_NO_WAIT as the
timeout parameter, effectively polling on the object.
Change-Id: Iae0261daa98bff388dc482797cde69f94e2e95cc
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
- does not pull in printk(), for potential footprint gain
- does not pull in k_thread_abort(), for single-threaded systems
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
Change-Id: Ibc6a198b81a6cd73117d1e85aa05b92a4501a34d
Some bootloaders have power management support to restoer context
upon resume from deep sleep. In such cases, the OS startup code
should call the notification hook. Create Kconfig flags to configure
this option.
Jira: 1257
Change-Id: I9f40c5fa077c2f17dc8e9f11604c3ed17e549ed5
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
Builtin might not be available for ARMv6 (Cortex-M0/M0+) depending on
the toolchain used (not available by Zephyr's SDK GCC), so move the
atomic operations selection to the Cortex-M family Kconfig file.
Change-Id: I20a5a0c5fdd2bcff2d304139f5a7e8502fdb1cb3
Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org>
Arches now select whether they want to use the GCC built-ins,
their own assembly implementation, or the generic C code.
At the moment, the SDK compilers only support builtins for ARM
and X86. ZEP-557 opened to investigate further.
Change-Id: I53e411b4967d87f737338379bd482bd653f19422
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Convert leading whitespace into tabs in Kconfig files. Also replaced
double spaces between config and <prompt>.
Change-Id: I341c718ecf4143529b477c239bbde88e18f37062
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Avoids confusion with .gitignore rules, which were inadequate to
cover all the places where these files are found. At least in
VIM, these files are now syntax highlighted correctly.
Change-Id: I23810b0ed34129320cc2760e19ed1a610afe039e
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Basic build framework for Nios2. Everything is stubbed out,
we just want to have a build going so that we can start to
parallelize implementation tasks.
This patch is not intended to be functional, but should be
able to produce a binary for all the nanokernel-based
sanity checks.
Change-Id: I12dd8ca4a2273f7662bee46175822c9bbd99202a
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Add additional layers when defining SoCs to allow reuse among SoCs
of the same family and architecture.
The Board is the first location where we search for a linker.cmd file,
if not found we look for the linker file in
arch/<arch>/soc/<family>/<series>
Change-Id: I51d5e9a056220d0bd2ae0fa31474ffe63568e698
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Changed names of Kconfig flags, variables, functions, files and
return codes consistent with names used in the RFC. Updated
relevant comments to match the changes.
Origin: Original
Change-Id: Ie7941032d7ad7af61fc02928f74538745e7966e8
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This is part of an ongoing development of power management
support in zephyr. This implementation builds upon an existing
hook interface and adds more enhancements. This was tested
with reference implementations on quark_d2000 and quark_se.
Change-Id: I28092b7ec90ce1f1cc661cf99ca88708910c8eb2
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
Modifications to timer drivers and interrupt setup, to manage
the tickless idle for the x86 architecture
Change-Id: Ie02d484b7e5636de6ea382ba2eeed57e704c8498
Signed-off-by: Sergio Rodriguez <sergio.sf.rodriguez@intel.com>
Ulf Magnusson