Import <sys/tree.h> from Newlib as <rtems/score/bsd-tree.h> using Newlib commit:
commit eb03ac17f16f1bd354482148426353fd35cd879d
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Tue Oct 5 15:53:47 2021 +0200
sys/tree.h: Red child with black sibling rotations
Add specialized rotations RB_RED_ROTATE_LEFT() and RB_RED_ROTATE_RIGHT() which
may be used if we rotate a red child which has a black sibling. Such a red
node must have at least two child nodes so that the following red-black tree
invariant is fulfilled:
Every path from a given node to any of its descendant NULL nodes goes through
the same number of black nodes.
PARENT
/ \
BLACK RED
/ \
BLACK BLACK
Close#5049.
Closes#5055
## Summary
add rtems_counting_semaphore_wait_timed_ticks and rtems_counting_semaphore_try_wait for self-contained object counting semaphore.
1. rtems_counting_semaphore_wait_timed_ticks(rtems_counting_semaphore \*counting_semaphore,uint32_t ticks)
2. rtems_counting_semaphore_try_wait(rtems_counting_semaphore \*counting_semaphore)
close issue #5055.
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Added field to the aio control block to track when a result is retrieved
and modified code accordingly.
Updated documentation for aio_return() and aio_error().
Updated test psxaio01 to make it compatible with specifications.
Closes#5039
On some targets or configurations, the data cache cannot be disabled.
The data cache may be necessary to provide atomic operations. In SMP
configurations, the data cache may be required to ensure data coherency.
Close#5050.
If the RTEMS_INTERRUPT_LOCK_NEEDS_OBJECT define has a non-zero value,
then the interrupt lock operations require an object of type
rtems_interrupt_lock, otherwise no lock object is required.
This indication can be used to avoid the space overhead for lock objects
when they are not needed. In this case, the lock operations will not
use a lock objects parameter.
Update #4957 and #5038.
When starting multitasking there is a chance an interrupt could be fired
while rsp is still pointing to the ISR stack area if we load rflags
before rsp on "_CPU_Context_restore"
Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.
Sponsored by: Netflix
The interrupt context save is now done in the BSP. This avoids an issue
where a register is modified by the interrupt handler before it is
saved. Specifically, the MSR register was modified by the `addi`
instruction in the interrupt handler before the MSR was saved. This
caused the MSR to be saved with the wrong value.
Closes#4962
This function may be used to ensure that a count of processors performed a set
of actions and then wait on the barrier performing only memory loads (no memory
stores).
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
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.
