This commit makes it possible to infer Z_ARCH_EXCEPT()
calls in SVCs that escalate to HardFault due to being
invoked from priority level equal or higher to the
interrupt priority level of the SVC Handler.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
commit 780324b8ed ("cleanup: rename fiber/task -> thread")
seems to be done by a script and in that particular case turned
menaingful sentence into nonsense. Alas, threads might be in all
four states.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Anas Nashif <anas.nashif@intel.com>
We manage IRQs in a quite a different way now since
commit f8d061faf7 ("arch: arc: add nested interrupt support")
so that comment not only makes no sense but also may fool a reader
as disabling of interrupts happens in the very beginning of
_rirq_exit() but not here.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
we should not rely on that eret has a copy of ilink in fast
irq handling. This will cause crash for hs cores.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
For the old codes, if nest interrupts come out after _isr_wrapper
and before _check_nest_int_by_irq_act, then multi-bits in irq_act
will be set, this will result irq stack will not be switched in
correctly
As a fix, it's still need to use nest interrupt counter to do
interrupt stack switch as before
The difference is in the past exc_nest_count is used, but here
_kernel.nested/_kernel.cpus[cpu_id].nested is used.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
* in arc secureshield interrupts can be configured
as secure or normal
* in sw design, high interrupt priorites are allocated to
secure world, low priorities are allocated to normal world.
* secure interrupt > secure thread > normal interrupt > normal
thead
So, here secure world/firmware only checks secure interrupt
priorities
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
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>
Set the recommended thread stack size to 40 bytes in case a build is
made for a 64-bit native posix board
Signed-off-by: Jan Van Winkel <jan.van_winkel@dxplore.eu>
Update the xtensa backend to work better with the new fatal error
architecture. Move the stack frame dump (xtensa uses a variable-size
frame becuase we don't spill unused register windows, so it doesn't
strictly have an ESF struct) into z_xtensa_fatal_error(). Unify the
older exception logging with the newer one (they'd been sort of glomed
together in the recent rework), mostly using the asm2 code but with
the exception cause stringification and the PS register field
extraction from the older one.
Note that one shortcoming is that the way the dispatch code works, we
don't have access to the spilled frame from within the spurious error
handler, so this can't log the interrupted CPU state. This isn't
fixable easily without adding overhead to every interrupt entry, so it
needs to stay the way it is for now. Longer term we could exract the
caller frame from the window state and figure it out with some
elaborate assembly, I guess.
Fixes#18140
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
It was discovered that the xtensa version of
z_arch_irq_connect_dynamic() was being removed along with the old
xtensa architecture support, because it was never included in the asm2
builds.
But there's no xtensa-specific code in it at all. Architectures that
use the existing sw_isr_table mechanism and don't (or can't, in the
case of xtensa which has fixed interrupt priority) interpret the other
parameters might as well have access to a working generic
implementation.
Fixes#18272
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Consistently place C++ use of extern "C" after all include directives,
within the negative branch of _ASMLANGUAGE if used.
Remove extern "C" support from files that don't declare objects or
functions.
In arch/arc/arch.h the extern "C" in the including context is left
active during an include to avoid more complex restructuring.
Background from issue #17997:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Consistently place C++ use of extern "C" after all include directives,
within the negative branch of _ASMLANGUAGE if used.
Remove extern "C" support from files that don't declare objects or
functions.
Background from issue #17997:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Consistently place C++ use of extern "C" after all include directives,
within the negative branch of _ASMLANGUAGE if used.
Background from issue #17997:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Consistently place C++ use of extern "C" after all include directives,
within the negative branch of _ASMLANGUAGE if used.
In arch.h the extern "C" in the including context is left active during
include of target-specific mpu headers to avoid more complex
restructuring.
Background from issue #17997:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Consistently place C++ use of extern "C" after all include directives,
within the negative branch of _ASMLANGUAGE if used.
Background from issue #17997:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
'recoverable' is a value passed by reference and we
should be dereferencing the pointer, to check if the
fault has been classified as recoverable.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
Consistently place C++ use of extern "C" after all include directives,
within the negative branch of _ASMLANGUAGE if used.
Remove extern "C" support from files that don't declare objects or
functions.
Background from issue #17997:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
SR and LR were used as global names for load and store RISC-V assembler
operations, colliding with other uses such as SR for STATUS REGISTER in
some peripherals. Renamed them to a longer more specific name to avoid
the collision.
Signed-off-by: Karsten Koenig <karsten.koenig.030@gmail.com>
When coming out of an exception, we need to mask interrupts
to avoid races when decrementing the nested count. Move
the instruction that does this earlier.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Related to #17997, for the POSIX arch:
* Remove some unnecessary extern "C" and ifdef blocks
* Move an include out of one of these blocks
* Add a missing extern "C" block
Background:
Declarations that use C linkage should be placed within extern "C"
so the language linkage is correct when the header is included by
a C++ compiler.
Similarly #include directives should be outside the extern "C" to
ensure the language-specific default linkage is applied to any
declarations provided by the included header.
See: https://en.cppreference.com/w/cpp/language/language_linkage
Signed-off-by: Alberto Escolar Piedras <alpi@oticon.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>
according to high-level design,in user mode software-triggered system
fatal exceptions only allow oops and stack check failure
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
exception, different with irq offload, may be raised interrupt
handling, e.g.
* z_check_stack_sentinel
* wrong code
we need to add specific handling of this case in exception handling
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
after appling the new "_get_curr_cpu_irq_stack" in _exc_entry,
the caculation of exception stack is wrong, this will
cause stack overflow, make the exception handling corrupt.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
This commit enables the option to route the BusFault,
HardFault, and NMI exceptions in Secure state, when
building for Cortex-M CPUs with ARM_SECURE_FIRMWARE=y.
This allows the various test to utilize BusFault,
HardFault and NMI exceptions during testing.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
For now we enforce the medany code model for 64-bit builds as we get
reloc issues otherwise. The instruction set and ABI are also set to
soft-float usage.
The ilp32 ABI is explicitly specified on 32-bit build to make sure
it is not using a wrong default if the same toolchain is used for both
32- and 64-bit builds. The archittecture options are the same as the
SDK's riscv32 toolchain default in that case.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Since commit c535300539 ("drivers/timer: New ARM SysTick driver"),
_NanoIdleValGet and _NanoIdleValClear have been unused.
Signed-off-by: Bradley Bolen <bbolen@lexmark.com>
Assembly language start code will enter here, which sets up
early kernel initialization and then calls z_cstart() when
finished.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Removes very complex boot-time generation of page tables
with a much simpler runtime generation of them at bootup.
For those x86 boards that enable the MMU in the defconfig,
set the number of page pool pages appropriately.
The MMU_RUNTIME_* flags have been removed. They were an
artifact of the old page table generation and did not
correspond to any hardware state.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
* modify the reset flow for SMP
* add smp related initialization
* implement ipi related functions
* implement thread switch in isr/exception
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
* arc connect is a component to connect multiple arc cores
* it's necessary for arc smp support
* the following features are implemented
* inter-core interrupt unit
* gloabl free running counter
* inter-core debug unit
* interrupt distribute unit
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
Makes the code that defines stacks, and code referencing
areas within the stack object, much clearer.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Previously, context switching on x86 with memory protection
enabled involved walking the page tables, de-configuring all
the partitions in the outgoing thread's memory domain, and
then configuring all the partitions in the incoming thread's
domain, on a global set of page tables.
We now have a much faster design. Each thread has reserved in
its stack object a number of pages to store page directories
and page tables pertaining to the system RAM area. Each
thread also has a toplevel PDPT which is configured to use
the per-thread tables for system RAM, and the global tables
for the rest of the address space.
The result of this is on context switch, at most we just have
to update the CR3 register to the incoming thread's PDPT.
The x86_mmu_api test was making too many assumptions and has
been adjusted to work with the new design.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
The current API was assuming too much, in that it expected that
arch-specific memory domain configuration is only maintained
in some global area, and updates to domains that are not currently
active have no effect.
This was true when all memory domain state was tracked in page
tables or MPU registers, but no longer works when arch-specific
memory management information is stored in thread-specific areas.
This is needed for: #13441#13074#15135
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
These turned out to be quite useful when debugging MMU
issues, commit them to the tree. The output format is
virtually the same as gen_mmu_x86.py's verbose output.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Ioannis Glaropoulos