| Commit message (Collapse) | Author | Age | Files | Lines |
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This file contains the parts of <rtems/score/userext.h> that are only
necessary for the RTEMS implementation.
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Avoid uninitialized stack variable. This is not a proper fix. It is
not clear what the task should do if argument != 1.
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Include <bsp/default-initial-extension.h> in all BSPs. Call
rtems_fatal() with RTEMS_FATAL_SOURCE_EXIT as source and the exit()
status code as fatal code in every bsp_cleanup(). Move previous
bsp_cleanup() code into bsp_fatal_extension().
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Use INTERNAL_ERROR_CPU_ISR_INSTALL_VECTOR on PowerPC for
_CPU_ISR_install_vector().
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Include <bsp.h> for proper BSP specific <rtems/confdefs.h>
initialization.
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The critical section check never succeeded since watchdogs are ordered
with respect to the insertion time. Now we call the watchdog routine if
appropriate and bypass the normal watchdog mechanic.
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System events are similar to normal events. They offer a second set of
events. These events are intended for internal RTEMS use and should not
be used by applications (with the exception of the transient system
event).
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The work areas (RTEMS work space and C program heap) will be initialized
now in a separate step and are no longer part of
rtems_initialize_data_structures(). Initialization is performed with
tables of Heap_Area entries. This allows usage of scattered memory
areas present on various small scale micro-controllers.
The sbrk() support API changes also. The bsp_sbrk_init() must now deal
with a minimum size for the first memory chunk to take the configured
work space size into account.
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Not every BSP supports a 250 micro seconds clock tick interval. For
example PSIM.
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The changes in _Thread_Dispatch() of commits
dad36c52b8be5d7b46bc7af85655055db7208652 and
d4dc7c8196355f08044e67a3f5c1e19485f17ff1 introduced a severe bug which
destroys the real-time properties of RTEMS completely.
Consider the following scenario. We have three tasks L (lowest
priority), M (middle priority), and H (highest priority). Now let a
thread dispatch from M to L happen. An interrupt occurs in
_Thread_Dispatch() here:
void _Thread_Dispatch( void )
{
[...]
post_switch:
_ISR_Enable( level );
<-- INTERRUPT
<-- AFTER INTERRUPT
_Thread_Unnest_dispatch();
_API_extensions_Run_postswitch();
}
The interrupt event makes task H ready. The interrupt code will see
_Thread_Dispatch_disable_level > 0 and thus doesn't perform a
_Thread_Dispatch(). Now we return to position "AFTER INTERRUPT". This
means task L executes now although task H is ready! Task H will execute
once someone calls _Thread_Dispatch().
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Author: Krzysztof Mięsowicz <krzysztof.miesowicz@gmail.com>
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This reverts commit cf42a6ea9dbb6ebee498ae8db319d3e475bcd6be.
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Group the global TOD variables (_TOD_Now, _TOD_Uptime, and _TOD_Is_set)
in a structure to reduce address loads in _TOD_Tickle_ticks().
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Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
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Global data was declared in system.h but should have been extern
in system.h and declared in init.c. There were duplicate symbol
linking errors on at least powerpc/mpc8260ads.
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The implementation of RBTree_Next was using an awkward construction to detect
and avoid accessing the false root of the red-black tree. To deal with the
false root, RBTree_Next was comparing node parents with the control node.
Instead the false root can be detected by checking if the grandparent of a
node exists; the grandparent of the tree's true root is NULL by definition
so the root of the tree is found while walking up the tree by checking for
the non-existence of a grandparent.
This change propagates into the predecessor/successor and iterate functions.
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See http://www.rtems.org/pipermail/rtems-devel/2012-May/001006.html
for details.
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The per file descriptor semaphore (field of rtems_libio_t) is unused in
RTEMS. There is a considerable memory overhead due to that. A
semaphore needs roughly 124 bytes which is huge compared to the
approximately 72 bytes for the file descriptor structure itself. Device
drivers can create their own synchronization primitives in the open
handler on demand.
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Date and ownership determined from file history.
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Add the lipqos and sptest.
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Since the CBS scheduler is inspired by AQuoSA project for Linux, additional API
(qreslib) compliant with Linux has been created.
Sptest for qreslib included.
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New functions
o _RBTree_Next_unprotected(),
o _RBTree_Next(),
o _RBTree_Successor_unprotected(),
o _RBTree_Predecessor_unprotected(),
o rtems_rbtree_successor_unprotected(), and
o rtems_rbtree_predecessor_unprotected().
Change prototype of
o _RBTree_Successor(),
o _RBTree_Predecessor(),
o rtems_rbtree_successor(), and
o rtems_rbtree_predecessor().
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Change the meaning of the compare result to simplify comparison of
integer keys.
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Allow creation of nodes with an unsupported type. Later the usage of
such nodes will return an error status.
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o A new data structure rtems_filesystem_global_location_t was
introduced to be used for
o the mount point location in the mount table entry,
o the file system root location in the mount table entry,
o the root directory location in the user environment, and
o the current directory location in the user environment.
During the path evaluation global start locations are obtained to
ensure that the current file system instance will be not unmounted in
the meantime.
o The user environment uses now reference counting and is protected
from concurrent access.
o The path evaluation process was completely rewritten and simplified.
The IMFS, RFS, NFS, and DOSFS use now a generic path evaluation
method. Recursive calls in the path evaluation have been replaced
with iteration to avoid stack overflows. Only the evaluation of
symbolic links is recursive. No dynamic memory allocations and
intermediate buffers are used in the high level path evaluation. No
global locks are held during the file system instance specific path
evaluation process.
o Recursive symbolic link evaluation is now limited by
RTEMS_FILESYSTEM_SYMLOOP_MAX. Applications can retrieve this value
via sysconf().
o The device file system (devFS) uses now no global variables and
allocation from the workspace. Node names are allocated from the
heap.
o The upper layer lseek() performs now some parameter checks.
o The upper layer ftruncate() performs now some parameter checks.
o unmask() is now restricted to the RWX flags and protected from
concurrent access.
o The fchmod_h and rmnod_h file system node handlers are now a file
system operation.
o The unlink_h operation has been removed. All nodes are now destroyed
with the rmnod_h operation.
o New lock_h, unlock_h, clonenod_h, and are_nodes_equal_h file system
operations.
o The path evaluation and file system operations are now protected by
per file system instance lock and unlock operations.
o Fix and test file descriptor duplicate in fcntl().
o New test fstests/fsnofs01.
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The tests for the rtems_rbtree_predecessor/successor check for a
range of values for the target id of the predecessor/successor
when we know the exact expected value. This commit makes the
test more precise.
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Replaced Allocate_majority_of_workspace() with
rtems_workspace_allocate(). Replaced Allocate_majority_of_heap() with
rtems_heap_greedy_allocate().
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This PR was about a warning for no previous prototype for
rtems_interrupt_level_attribute. This method exists (like
a few others) to have real bodies for Classic API services
implemented as macros. These macros are not available from
anything but C and C++. The most explicit use was in the Ada
binding but these would be needed from assembly language
or any other non-C based language.
On top of needing a prototype, the methods were misnamed.
They were related to modes. This renames them, moves the
file, fixes test code, etc.
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PR 1924/cpukit
* spstkalloc02/.cvsignore, spstkalloc02/Makefile.am,
spstkalloc02/init.c, spstkalloc02/spstkalloc02.doc,
spstkalloc02/spstkalloc02.scn: New files.
* Makefile.am, configure.ac: Reflect changes above.
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