move misc/dlist.h to sys/dlist.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
move atomic.h to sys/atomic.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Change removes tracing hooks before threads are initialized
and thread switched out hook for ARM before first time switching
to main thread.
Signed-off-by: Marek Pieta <Marek.Pieta@nordicsemi.no>
CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT is taken into
account when allocating the area for the interrupt stack
using the K_THREAD_STACK_DEFINE macro. Therefore, we can
simplify how the top of the stack is derived during the
initialization of the system, by removing one more
occurrence of CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
For architectures with custom swap to main, currently:
- arm
- posix
we are now using K_THREAD_STACK_SIZEOF macro to pass the
main thread stack size to z_arch_switch_to_main_thread().
This does not introduce any behavioral changes for posix;
the K_THREAD_STACK_SIZEOF() simply returns the sizeof()
the stack object. For Arm, this allows us to clean-up one
more occurence of CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
in kernel_arch_func.h.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Only a single bit of the 4-byte internal (thread.arch) status
variable 'mode' is currently used, when we build with User mode
support (CONFIG_USERSPACE=y). In this commit we extend the usage
of 'mode' variable, adding an additional bit-flag to track the
status of the floating point context in a particular thread,
i.e. to track whether FP context is active or not. The status
bit is meant to be used in context-switch, to restore the FP
register context when required.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
In FP Sharing mode we enable both automatic and lazy state
preservation of the FP context. This configuration improves
interrupt latency. Under this configuration the FP registers
will only be stacked when the thread is swapped out during
context-switch. Before jumping to main() we clear the FPCA
flag of the CONTROL register, so the FP context can be used
by the main thread.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The typeof definitions in tz.h and cmse.h are not required
any more, as the ARM GCC toolchain intrinsics have been
modified to use __typeof__ directly.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
In kernel_arch_init() we initialize the ARM core (interrupt
setup, fault init, etc.) so we can also move z_clearfaults()
in the same function and skip invoking it in the SoC init
functions.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The ARM Cortex-M Exception Stack Frame (ESF) may consist of
several stack frame contexts (basic state context, additional
state context, FP context, etc.). To reflect these structural
properties, this commit re-factors the ESF, splitting out the
basic stack frame, holding the state context, into its own
struct container. The commit does not introduce behavioral
changes.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
When some header are included into C++ source file, this kind of
compilations errors are generated:
error: invalid conversion from 'void*'
to 'u32_t*' {aka 'unsigned int*'} [-fpermissive]
Signed-off-by: Benoit Leforestier <benoit.leforestier@gmail.com>
Initialize the Floating Point Status and Control Register when in
Unshared FP Registers mode (In Shared FP Registers mode, FPSCR is
initialized at thread creation for threads that make use of the FP).
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Under Unshared FP register mode we are not sharing the
FP context among different threads, so we do not need to
include the FP high registers bank in the thread.arch
container.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The struct _caller_saved is not used. Most architectures put
automatically the registers onto stack, in others architectures the
exception code does it.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
The struct _kernel_ach exists only because ARC' s port needed it, in
all other ports this was defined as an empty struct. Turns out that
this struct is not required even for ARC anymore, this is a legacy
code from nanokernel time.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This macro is slated for complete removal, as it's not possible
on arches with an MPU stack guard to know the true buffer bounds
without also knowing the runtime state of its associated thread.
As removing this completely would be invasive to where we are
in the 1.14 release, demote to a private kernel Z_ API instead.
The current way that the macro is being used internally will
not cause any undue harm, we just don't want any external code
depending on it.
The final work to remove this (and overhaul stack specification in
general) will take place in 1.15 in the context of #14269Fixes: #14766
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Rename reserved function names in arch/ subdirectory. The Python
script gen_priv_stacks.py was updated to follow the 'z_' prefix
naming.
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
The clang ARM assembler is a bit stricter than GNU as. Change mov to
movs for ARMv6 case of z_arch_switch_to_main_thread.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit partially reverts the changes introduced in
(bbe1a19786), where the PSP
modification, the interrupt enabling, and the branch to main
thread were refactored in C functions. This introduced an issue
with stack usage when compiling without any optimization.
Reverting to use assembly functions to jump to main thread
ensures, now, that the pointer to main() is preserved intact
while changing the PSP and passed correctly to z_thread_entry().
Fixes#14471.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit simply moves the MPU re-programming of
dynamic regions during initialization to occur right
before switching PSP to the main thread stack. As a
result, the MPU re-programming will execute using
the interrupt stack. No functional changes are
introduced.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Update reserved function names starting with one underscore, replacing
them as follows:
'_k_' with 'z_'
'_K_' with 'Z_'
'_handler_' with 'z_handl_'
'_Cstart' with 'z_cstart'
'_Swap' with 'z_swap'
This renaming is done on both global and those static function names
in kernel/include and include/. Other static function names in kernel/
are renamed by removing the leading underscore. Other function names
not starting with any prefix listed above are renamed starting with
a 'z_' or 'Z_' prefix.
Function names starting with two or three leading underscores are not
automatcally renamed since these names will collide with the variants
with two or three leading underscores.
Various generator scripts have also been updated as well as perf,
linker and usb files. These are
drivers/serial/uart_handlers.c
include/linker/kobject-text.ld
kernel/include/syscall_handler.h
scripts/gen_kobject_list.py
scripts/gen_syscall_header.py
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
Based on the definition of _ARCH_THREAD_STACK_DEFINE() macro
for ARM, the MPU Stack Guard region is placed inside the
allocated stack object, only if
CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT and CONFIG_USERSPACE
are both set. For ARM stack objects, allocated using the
_ARCH_THREAD_STACK_DEFINE() macro, such as the threads' stacks
and the interrupt stack, the above must be reflected on how we
set the initial start of the stacks.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Replace Cortex-M3 with Cortex-M architecture family
in the header documentation of kernel_arch_data.h and
kernel_arch_func.h, which are generic header files for
the entire familty of ARM Cortex-M CPUs. The commit
adds some more minor style fixes in functions'
documentation.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit enforces default double-word stack alignmnet
on exception entry for Cortex-M3 and Cortex-M4 MCUs. The
patch ensures that we have consistent behavior in all
Cortex-M MCUs (double-world stack alignment on exception
entry is enforced by default in ARMv6, ARMv8, and Cortex-M7
processors).
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
use cmsis functions to avoid using direct assembly for main thread
switching.
This patch uses cmsis functions to:
- set PSP(process stack pointer) to main stack
- enable interrupts
Fixes#12878
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
If you enable HW_STACK_PROTECTION, DEBUG_OPTIMIZATIONS, and
CPU_STATS, you can get a crash when switching to the main thread
due to the r3 getting munged during a inline ASM call. This patch
fixes that by adding r3 to the clobber list.
Fixes#12821
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This commit introduces an ARM API that allows the user to
program a set of dynamic MPU regions at run-time. The API
function is invoked every time the memory map needs to be
re-programmed (for example at thread context-switch). The
functionality is implementated in arm_core_mpu.c.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit introduces the generic ARM (core) API, which allows
the user to program a set of static (fixed) MPU regions at boot
time. The API function is invoked upon initialization, in the
ARM-specific call of _arch_switch_to_main_thread(). The API
implementation is provided in arm_core_mpu.c.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit removes the priv_stack_size field from the _thread_arch
on arm architecture as there is no code using value stored in this
variable.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
There were many platforms where this function was doing nothing. Just
merging its functionality with _PrepC function.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Avoid nested C++ comments inside the C comment block due to MISRA-C
rule 3.1. Keep the variables documenting possible caller saved
registers.
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
This commit introduces and implements an internal ARM
TrustZone-M API to allow the Non-Secure firmware to use
the Floating Point Unit (FPU).
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
The function _IsInIsr computes a Boolean value but the function
returns a integer value. Fix the return type of the function.
This makes the zephyr api _is_in_isr() return a boolean type.
Thereby making it consistent across all the architectures.
Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
Any word started with underscore followed by and uppercase letter or a
second underscore is a reserved word according with C99.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
A bootloader may leave primask or faultmask set, so clear them during
startup when we enable interrupts and switch to the main thread.
Previously we only cleared primask for architecture variants which don't
support basepri, but now we do it for all architecture variants.
Fixes a failure on mimxrt1050_evk with the latency_measure test and
shell_module sample when using an nxp internal bootloader.
Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
Move to more generic tracing hooks that can be implemented in different
ways and do not interfere with the kernel.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit adds K-config options that allow the user to
signify an ARM Secure Firmware that contains Secure Entry
functions and to define the starting address of the linker
section that will contain the Secure Entry functions. It
also instructs the linker to append the NSC section if
instructed so by the user.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit contribute an internal ARM API that enables the
user to confgure an ARM Security Attribution Unit region. It
also defines ARM_SAU as a K-config option to indicate that
an MCU implements the ARM SAU.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit contributes a simple API to allow the TrustZone
user to block or permit Non-Secure System Reset requests.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit introduces an internal ARM macro API to allow the
TrustZone user to define Non-Secure entry functions.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit defines and implements and internal ARM macro API
that allows the TrustZone user to declare, define, and evaluate
pointers of non-secure function type.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Define and implement a function to read the number of
SAU regions configued for the MCU.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit defines and implements an internal ARMv8-M TrustZone
API to allow the user to select whether Secure exceptions will
have priority boosting over Non-Secure exceptions.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit defines and implements an internal ARMv8-M TrustZone
API to allow the user to configure the target state of fault
exceptions that are not banked between security states.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit adds a macro definition for the Vector Key value of
AIRCR register that permits the accompanying writes. The macro
is then used instead of the hard-coded numerical value.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
