| Commit message (Collapse) | Author | Files | Lines |
|
A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.
This has at least seven problems:
* The make preinstall step itself needs time and disk space.
* Errors in header files show up in the build tree copy. This makes it
hard for editors to open the right file to fix the error.
* There is no clear relationship between source and build tree header
files. This makes an audit of the build process difficult.
* The visibility of all header files in the build tree makes it
difficult to enforce API barriers. For example it is discouraged to
use BSP-specifics in the cpukit.
* An introduction of a new build system is difficult.
* Include paths specified by the -B option are system headers. This
may suppress warnings.
* The parallel build had sporadic failures on some hosts.
This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.
The new cpukit include directories are:
* cpukit/include
* cpukit/score/cpu/@RTEMS_CPU@/include
* cpukit/libnetworking
The new BSP include directories are:
* bsps/include
* bsps/@RTEMS_CPU@/include
* bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include
There are build tree include directories for generated files.
The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.
The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.
Update #3254.
|
|
Update #3059.
|
|
Update #3059.
|
|
Implement the Processor_mask via <sys/bitset.h>. Provide
_Processor_mask_To_uint32_t() to enable its use in device specific
routines, e.g. interrupt affinity register in an interrupt controller.
Update #3059.
|
|
|
|
The fatal is internal indicator is redundant since the fatal source and
error code uniquely identify a fatal error. Keep the fatal user
extension is internal parameter for backward compatibility and set it to
false always.
Update #2825.
|
|
According to the C11 standard only atomic read-modify-write operations
guarantee that the last value written in modification order is read, see
"7.17.3 Order and consistency". Thus we must use a read-modify-write in
_SMP_Inter_processor_interrupt_handler() to make sure we read an
up-to-date message.
|
|
Update #2554.
|
|
The use case for this is the Cortex-A9 MPCore which has per-processor
registers (only accessible by a particular processor) for the global
timer used by the clock driver. This might be useful for other drivers
as well.
Update #2554.
|
|
|
|
|
|
According to the C11 and C++11 memory models only a read-modify-write
operation guarantees that we read the last value written in modification
order. Avoid the sequential consistent thread fence and instead use the
inter-processor interrupt to set the thread dispatch necessary
indicator.
|
|
|
|
|
|
Adds functions that allows the user to specify which cores that should
perform the cache operation. SMP messages are sent to all the specified
cores and the caller waits until all cores have acknowledged that they
have flushed their cache. If CPU_CACHE_NO_INSTRUCTION_CACHE_SNOOPING is
defined the instruction cache invalidation function will perform the
operation on all cores using the previous method.
|
|
Change message type to unsigned long to match other SMP message functions.
|
|
|
|
Sort enum lexicographically.
|
|
Do not use the Per_CPU_Control::started in
_SMP_Start_multitasking_on_secondary_processor() since this field may be
not up to date when a secondary processor reads it. Use the read-only
scheduler assignment instead.
Add a new fatal error SMP_FATAL_MULTITASKING_START_ON_INVALID_PROCESSOR.
This prevents out-of-bounds access.
It is currently not possible to test these fatal errors. One option
would be to fake values of the _CPU_SMP_Get_current_processor(), but
unfortunately this function is inline on some architectures.
|
|
|
|
The same smp fatal code is used in percpu
_Per_CPU_State_change(). In order to determine which CPU
requested a fatal shutdown and which CPU responds to it a
unique code should be used.
A unique code makes it also possible to handle the CPUs
differently in the fatal exception handler.
|
|
|
|
This handler can be used to test the inter-processor interrupt
implementation.
|
|
Avoid the SMP_FATAL_SCHEDULER_WITHOUT_PROCESSORS fatal error and make it
a run-time error in rtems_scheduler_ident() and _Scheduler_Get_by_id().
|
|
Use "cpu" for an arbitrary Per_CPU_Control variable.
Use "cpu_self" for the Per_CPU_Control of the current processor.
Use "cpu_index" for an arbitrary processor index.
Use "cpu_index_self" for the processor index of the current processor.
Use "cpu_count" for the processor count obtained via
_SMP_Get_processor_count().
Use "cpu_max" for the processor maximum obtained by
rtems_configuration_get_maximum_processors().
|
|
Clustered/partitioned scheduling helps to control the worst-case
latencies in the system. The goal is to reduce the amount of shared
state in the system and thus prevention of lock contention. Modern
multi-processor systems tend to have several layers of data and
instruction caches. With clustered/partitioned scheduling it is
possible to honour the cache topology of a system and thus avoid
expensive cache synchronization traffic.
We have clustered scheduling in case the set of processors of a system
is partitioned into non-empty pairwise-disjoint subsets. These subsets
are called clusters. Clusters with a cardinality of one are partitions.
Each cluster is owned by exactly one scheduler instance.
|
|
Add and use _CPU_SMP_Start_processor(). Add and use
_CPU_SMP_Finalize_initialization(). This makes most
_CPU_SMP_Initialize() functions a bit simpler since we can calculate the
minimum value of the count of processors requested by the application
configuration and the count of physically or virtually available
processors in the high-level code.
The CPU port has now the ability to signal a processor start failure.
With the support for clustered/partitioned scheduling the presence of
particular processors can be configured to be optional or mandatory.
There will be a fatal error only in case mandatory processors are not
present.
The CPU port may use a timeout to monitor the start of a processor.
|
|
Add _Per_CPU_State_wait_for_ready_to_start_multitasking(). Add new
fatal SMP error SMP_FATAL_SHUTDOWN_EARLY.
|
|
|
|
Rename _SMP_Request_other_cores_to_perform_first_context_switch() into
_SMP_Request_start_multitasking() since this requests now a multitasking
start on all configured and available processors. The name corresponds
_Thread_Start_multitasking() and
_SMP_Start_multitasking_on_secondary_processor() actions issued in
response to this request. Move in source file to right place.
Rename PER_CPU_STATE_READY_TO_BEGIN_MULTITASKING into
PER_CPU_STATE_READY_TO_START_MULTITASKING.
Rename PER_CPU_STATE_BEGIN_MULTITASKING into
PER_CPU_STATE_REQUEST_START_MULTITASKING.
Rename _SMP_Request_other_cores_to_shutdown() into
_SMP_Request_shutdown().
Add a per-CPU state lock to protect all changes. This was necessary to
offer a controlled shutdown of the system (atomic read/writes alone are
not sufficient for this kind of synchronization).
Add documentation for Per_CPU_State.
Delete debug output.
New tests smptests/smpfatal01 and smptests/smpfatal02.
|
|
Inline _SMP_Inter_processor_interrupt_handler() to avoid function call
overhead. Remove debug output.
|
|
Rename rtems_smp_process_interrupt() into
_SMP_Inter_processor_interrupt_handler(). Delete unused header file
<rtems/bspsmp.h>.
|
|
Rename rtems_smp_secondary_cpu_initialize() into
_SMP_Start_multitasking_on_secondary_processor(). Move declaration to
<rtems/score/smpimpl.h>.
|
|
Collect SMP implementation specific parts in the
<rtems/score/smpimpl.h> header file.
|
|
|
|
Rename RTEMS_BSP_SMP_SHUTDOWN in SMP_MESSAGE_SHUTDOWN since SMP messages
have nothing to do with the BSP. Use UINT32_C() instead of casts.
|
|
Use rtems_fatal() instead of _CPU_Fatal_halt() to shutdown processors in
SMP configurations since this allows intervention of BSP or application
specific fatal extensions.
|
|
Move _SMP_Request_other_cores_to_shutdown() invocation from
rtems_shutdown_executive() to _Internal_error_Occurred() to allow a
proper shutdown on SMP configurations even in the error case.
|
|
|
|
Use an event triggered unicast to inform remote processors about a
necessary thread dispatch instead.
|
|
Add and use _SMP_Get_current_processor() and
rtems_smp_get_current_processor().
Delete bsp_smp_interrupt_cpu().
Change type of current processor index from int to uint32_t to match
_SMP_Processor_count type.
|
|
The thread dispatch is a side-effect of interrupt processing, thus there
is no need to send an explicit message.
|
|
Rename in rtems_smp_get_processor_count(). Always provide
<rtems/score/smp.h> and <rtems/rtems/smp.h>. Add
_SMP_Get_processor_count(). This function will be a compile time
constant defined to be one on uni-processor configurations. This allows
iterations over all processors without overhead on uni-processor
configurations.
|
|
Delete bsp_smp_wait_for(). Other parts of the system work without
timeout, e.g. the spinlocks. Using a timeout here does not make the
system more robust.
Delete bsp_smp_cpu_state and replace it with Per_CPU_State. The
Per_CPU_State follows the Score naming conventions. Add
_Per_CPU_Change_state() and _Per_CPU_Wait_for_state() functions to
change and observe states.
Use Per_CPU_State in Per_CPU_Control instead of the anonymous integer.
Add _CPU_Processor_event_broadcast() and _CPU_Processor_event_receive()
functions provided by the CPU port. Use these functions in
_Per_CPU_Change_state() and _Per_CPU_Wait_for_state().
Add prototype for _SMP_Send_message().
Delete RTEMS_BSP_SMP_FIRST_TASK message. The first context switch is
now performed in rtems_smp_secondary_cpu_initialize(). Issuing the
first context switch in the context of the inter-processor interrupt is
not possible on systems with a modern interrupt controller. Such an
interrupt controler usually requires a handshake protocol with interrupt
acknowledge and end of interrupt signals. A direct context switch in an
interrupt handler circumvents the interrupt processing epilogue and may
leave the system in an inconsistent state.
Release lock in rtems_smp_process_interrupt() even if no message was
delivered. This prevents deadlock of the system.
Simplify and format _SMP_Send_message(),
_SMP_Request_other_cores_to_perform_first_context_switch(),
_SMP_Request_other_cores_to_dispatch() and
_SMP_Request_other_cores_to_shutdown().
|
|
The output of the modules.html is much improved. Most
filesystem and POSIX API related groups are properly nested.
Some formatting issues were addressed as were multiple
inconsistencies.
|
|
|
|
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.
|
|
* rtems/include/rtems/rtems/types.h,
score/include/rtems/score/address.h,
score/include/rtems/score/apiext.h,
score/include/rtems/score/bitfield.h,
score/include/rtems/score/context.h,
score/include/rtems/score/corebarrier.h,
score/include/rtems/score/coremsg.h,
score/include/rtems/score/coremutex.h,
score/include/rtems/score/corerwlock.h,
score/include/rtems/score/coresem.h,
score/include/rtems/score/corespinlock.h,
score/include/rtems/score/interr.h, score/include/rtems/score/isr.h,
score/include/rtems/score/mpci.h, score/include/rtems/score/mppkt.h,
score/include/rtems/score/objectmp.h,
score/include/rtems/score/percpu.h,
score/include/rtems/score/priority.h,
score/include/rtems/score/rbtree.h,
score/include/rtems/score/scheduler.h,
score/include/rtems/score/smp.h, score/include/rtems/score/smplock.h,
score/include/rtems/score/stack.h,
score/include/rtems/score/states.h,
score/include/rtems/score/thread.h,
score/include/rtems/score/threadq.h,
score/include/rtems/score/threadsync.h,
score/include/rtems/score/timespec.h,
score/include/rtems/score/timestamp.h,
score/include/rtems/score/timestamp64.h,
score/include/rtems/score/tod.h, score/include/rtems/score/tqdata.h,
score/include/rtems/score/watchdog.h,
score/include/rtems/score/wkspace.h: Mark Score files as in Score
Group to improve Doxygen output.
|
|
PR 1796/cpukit
* sapi/src/exshutdown.c, score/include/rtems/score/percpu.h,
score/include/rtems/score/smp.h, score/src/smp.c,
score/src/threaddispatch.c, score/src/threadhandler.c: Added SMP
interprocess communications.
|
|
|