The clock tick rate was off by a factor of two in some configurations.
Use the maximum counter frequency to get the best time resolution. Do
not use the automatic interrupt clear feature.
Update #4982.
The rtems_cache_get_data_cache_size() and
rtems_cache_get_instruction_cache_size() functions shall return the entire
cache size for a level of 0. Levels greater than 0 shall return the size of
the associated level.
Update #4982.
Created an helper method that will be called by rtems_aio_handle().
The method will process the various types of aio requests.
Converted the old style documentation to Doxygen.
Formatted the code to adhere to rtems formatting rules.
Closes#5017
The _ARMV7M_Pendable_service_call() and _ARMV7M_Supervisor_call() work
as a team. The --ef and ++ef is there to preserve the original exception
frame across the jump to and from _ARMV7M_Thread_dispatch().
void _ARMV7M_Pendable_service_call( void )
{
Per_CPU_Control *cpu_self = _Per_CPU_Get();
/*
* We must check here if a thread dispatch is allowed. Right after a
* "msr basepri_max, %[basepri]" instruction an interrupt service may
still
* take place. However, pendable service calls that are activated during
* this interrupt service may be delayed until interrupts are enable
again.
*/
if (
( cpu_self->isr_nest_level |
cpu_self->thread_dispatch_disable_level ) == 0
) {
ARMV7M_Exception_frame *ef;
cpu_self->isr_nest_level = 1;
_ARMV7M_SCB->icsr = ARMV7M_SCB_ICSR_PENDSVCLR;
_ARMV7M_Trigger_lazy_floating_point_context_save();
At this point, the floating point context should be saved on the
exception frame. The FPCCR.LSPACT bit should be 0, to indicate that lazy
state preservation is no longer active.
ef = (ARMV7M_Exception_frame *) _ARMV7M_Get_PSP();
--ef;
_ARMV7M_Set_PSP( (uint32_t) ef );
This new exception frame is just there to jump to
_ARMV7M_Thread_dispatch(). Here was the problem, that FPCCR.LSPACT was
not set to 1. This resulted in a floating-point context from
uninitialized memory which could corrupt the floating-point state. See
also:
https://developer.arm.com/documentation/ddi0403/d/System-Level-Architecture/System-Level-Programmers--Model/ARMv7-M-exception-model/Exception-return-behavior?lang=en
/*
* According to "ARMv7-M Architecture Reference Manual" section B1.5.6
* "Exception entry behavior" the return address is half-word aligned.
*/
ef->register_pc = (void *)
((uintptr_t) _ARMV7M_Thread_dispatch & ~((uintptr_t) 1));
ef->register_xpsr = 0x01000000U;
}
}
Close#4923.
Makes the code in bsp/x86_64/amd64/start/start.S and the stack frame
setup by _CPU_Context_Initialize align the stack properly according to
what is expected by the x86-64 SysV ABI
Interrupt IDs 1020, 1021, 1022, and 1023 are reserved as special INTIDs
and should be ignored for normal RTEMS operation as they signal internal
changes in the interrupt controller that RTEMS itself is directly
causing.
There were some problems in the math calculating RAM length and NOCACHE
origin location. These have been resolved in this patch allowing RTEMS
RAM space to be relocated above 0xfe00000 to better accomodate other
elements in the system.
In e95dabc77 approvers/maintainer was moved to general/maintainer. It was moved
back in the last commit to test permissions though I forgot to note it there.
Re-add since things are working as expected.
This change is to avoid anyone who is in the 'approvers' group for maintenance
showing up as approvers. Access goes only one level up from the current group
so having approval groups one level down was causing issues with me, Chris and
Kinsey showing up.
Add directives to get and set the priority of an interrupt vector.
Implement the directives for the following BSP families:
* arm/lpc24xx
* arm/lpc32xx
* powerpc/mpc55xxevb
* powerpc/qoriq
Implement the directives for the following interrupt controllers:
* GICv2 and GICv3 (arm and aarch64)
* NVIC (arm)
* PLIC (riscv)
Update #5002.
Move the timerfd impelemntation from linux compat code to cpukit/score/src. Use
it to implement the new system calls for timerfd. Add a hook to kern_tc
to allow timerfd to know when the system time has stepped. Add kqueue
support to timerfd. Adjust a few names to be less Linux centric.
RelNotes: YES
Reviewed by: markj (on irc), imp, kib (with reservations), jhb (slack)
Differential Revision: https://reviews.freebsd.org/D38459
L_LINT macro is used with negative numbers [i.e.
L_LINT(time_freq, -MAXFREQ)], it could cause undefined
behavior. It should be similar to the L_RSHIFT(v, n) macro.
MFC after: 2 weeks
Reviewed by: cy
Pull Request: https://github.com/freebsd/freebsd-src/pull/769
Signed-off-by: Dmitriy Alexandrov <d06alexandrov@gmail.com>
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.
Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
