Since the tracing of thread being switched in/out has the same
instrumentation points, we can roll the tracing function calls
into the one for thread stats gathering functions.
This avoids duplicating code to call another function.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This code had one purpose only, feed timing information into a test and
was not used by anything else. The custom trace points unfortunatly were
not accurate and this test was delivering informatin that conflicted
with other tests we have due to placement of such trace points in the
architecture and kernel code.
For such measurements we are planning to use the tracing functionality
in a special mode that would be used for metrics without polluting the
architecture and kernel code with additional tracing and timing code.
Furthermore, much of the assembly code used had issues.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
"arch_switch" is declared as an inline function in kswap.h,
it should be a wrapper of arch level switch. The difference
of declaration and implementation of "arch_swich" causes
warning from MWDT compiler.
Use "arch_switch" with proper declararion (which is just
wraper for "z_arc_switch") to do conext switch for ARC.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Make the assembly codes compatible with both GNU
and Metaware toolchain.
* replace ".balign" with ".align"
".align" assembler directive is supposed by all
ARC toolchains and it is implemented in a same
way across ARC toolchains.
* replace "mov_s __certain_reg" with "mov __certain_reg"
Even though GCC encodes those mnemonics and even real
HW executes them according to PRM these are restricted
ones for mov_s and CCAC rightfully refuses to accept
such mnemonics. So for compatibility and clarity sake
we switch to 32-bit mov instruction which allows use
of all those instructions.
* Add "%%" prefix while accessing registers from inline
ASM as it is required by MWDT.
* Drop "@" prefix while accessing symbols (defined in C
code) from ASM code as it is required by MWDT.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
/#
* Move switched_in into the arch context switch assembly code,
which will correctly record the switched_in information.
* Add switched_in/switched_out for context switch in irq exit.
Signed-off-by: Watson Zeng <zhiwei@synopsys.com>
* update comments to match latest codes
* add extra comments for some assembly, macros
* use macro to replace duplcated codes
* remove unused codes, lables, symobols
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
overhaul the thread switch code in epilogue of irq and
exception handling:
* add z_arch_get_next_switch_handle to call z_get_next_switch_handle,
let the scheduler to decide the switch thread. This will also cover
the case of SMP.
* put lots of common codes in macros for thread switch to improve
the maintainablity, readability.
* clean up of some lables to make codes easier to understand
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
if USERSPACE is configured, it needs to record the user/kernel mode
of interrupted thread, because the switch of aux_sec_k_sp/aux_user_sp
depends on the aux_irq_act's U bit.
Signed-off-by: Wayne Ren <wei.ren@synopsys.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>
This commit refactors kernel and arch headers to establish a boundary
between private and public interface headers.
The refactoring strategy used in this commit is detailed in the issue
This commit introduces the following major changes:
1. Establish a clear boundary between private and public headers by
removing "kernel/include" and "arch/*/include" from the global
include paths. Ideally, only kernel/ and arch/*/ source files should
reference the headers in these directories. If these headers must be
used by a component, these include paths shall be manually added to
the CMakeLists.txt file of the component. This is intended to
discourage applications from including private kernel and arch
headers either knowingly and unknowingly.
- kernel/include/ (PRIVATE)
This directory contains the private headers that provide private
kernel definitions which should not be visible outside the kernel
and arch source code. All public kernel definitions must be added
to an appropriate header located under include/.
- arch/*/include/ (PRIVATE)
This directory contains the private headers that provide private
architecture-specific definitions which should not be visible
outside the arch and kernel source code. All public architecture-
specific definitions must be added to an appropriate header located
under include/arch/*/.
- include/ AND include/sys/ (PUBLIC)
This directory contains the public headers that provide public
kernel definitions which can be referenced by both kernel and
application code.
- include/arch/*/ (PUBLIC)
This directory contains the public headers that provide public
architecture-specific definitions which can be referenced by both
kernel and application code.
2. Split arch_interface.h into "kernel-to-arch interface" and "public
arch interface" divisions.
- kernel/include/kernel_arch_interface.h
* provides private "kernel-to-arch interface" definition.
* includes arch/*/include/kernel_arch_func.h to ensure that the
interface function implementations are always available.
* includes sys/arch_interface.h so that public arch interface
definitions are automatically included when including this file.
- arch/*/include/kernel_arch_func.h
* provides architecture-specific "kernel-to-arch interface"
implementation.
* only the functions that will be used in kernel and arch source
files are defined here.
- include/sys/arch_interface.h
* provides "public arch interface" definition.
* includes include/arch/arch_inlines.h to ensure that the
architecture-specific public inline interface function
implementations are always available.
- include/arch/arch_inlines.h
* includes architecture-specific arch_inlines.h in
include/arch/*/arch_inline.h.
- include/arch/*/arch_inline.h
* provides architecture-specific "public arch interface" inline
function implementation.
* supersedes include/sys/arch_inline.h.
3. Refactor kernel and the existing architecture implementations.
- Remove circular dependency of kernel and arch headers. The
following general rules should be observed:
* Never include any private headers from public headers
* Never include kernel_internal.h in kernel_arch_data.h
* Always include kernel_arch_data.h from kernel_arch_func.h
* Never include kernel.h from kernel_struct.h either directly or
indirectly. Only add the kernel structures that must be referenced
from public arch headers in this file.
- Relocate syscall_handler.h to include/ so it can be used in the
public code. This is necessary because many user-mode public codes
reference the functions defined in this header.
- Relocate kernel_arch_thread.h to include/arch/*/thread.h. This is
necessary to provide architecture-specific thread definition for
'struct k_thread' in kernel.h.
- Remove any private header dependencies from public headers using
the following methods:
* If dependency is not required, simply omit
* If dependency is required,
- Relocate a portion of the required dependencies from the
private header to an appropriate public header OR
- Relocate the required private header to make it public.
This commit supersedes #20047, addresses #19666, and fixes#3056.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
it's not allowed to switch to thread preempted by exception as
its context is not saved.
So if a thread switch is required in exception handling, e.g.
kill a thread, the old thread cannot be switched back
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
For arc processor equiped with secureshield, SEC_STAT.IRM
bit should be recorded, it determins which mode irq should
return
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
* it's based on ARC SecureShield
* add basic secure service in arch/arc/core/secureshield
* necesssary changes in arch level
* thread switch
* irq/exception handling
* initialization
* add secure time support
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
If the offset within the thread struct to the
ARC arch-specific 'relinquish_cause' member is too
large, ld_s instructions referencing it will not
compile. This happens easily if CONFIG_THREAD_NAME
reserves a name buffer within the thread struct, since
all the arch-specific members come last.
Use the regular 'ld' instruction instead.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
* here use new style z_arch_switch,i.e. CONFIG_USE_SWITCH
to replace old swap mechnism.
* it's also required by SMP support
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
Daniel Leung