When HYP mode is detected at startup then setup HYP mode
vectors table (for future extensions) clean exceptions
switching to HYP mode and switch CPU to ARM SVC mode.
BSPs which want to use this support need to include next option
in their configure.ac
RTEMS_BSPOPTS_SET([BSP_START_IN_HYP_SUPPORT],[*],[1])
RTEMS_BSPOPTS_HELP([BSP_START_IN_HYP_SUPPORT], [Support start of BSP in ARM HYP mode])
AM_CONDITIONAL(BSP_START_IN_HYP_SUPPORT,test "$BSP_START_IN_HYP_SUPPORT" = "1")
and need to include next lines in corresponding Makefile.am
if BSP_START_IN_HYP_SUPPORT
libbsp_a_SOURCES += ../shared/startup/bsp-start-in-hyp-support.S
endif
The main reason for inclusion of minimum hypervisor related defines
is that current ARM boards firmware and loaders (U-boot for example)
start loaded operating system kernel in HYP mode to allow it take
control of virtualization (Linux/KVM for example).
Provide the scheduler node to initialize or destroy to the corresponding
operations. This makes it possible to have more than one scheduler node
per thread.
Task priorities are only valid within a scheduler instance. The
rtems_task_set_scheduler() directive moves a task from one scheduler
instance to another using the current priority of the thread. However,
the current task priority of the source scheduler instance is undefined
in the target scheduler instance. Add a third parameter to specify the
priority.
Close#2749.
The ARM and PowerPC interrupt epilogues call _Thread_Dispatch() with
interrupts disabled (counter example: SPARC).
On SMP configurations, since inter-processor interrupts set the thread
dispatch necessary indicator this prevents a thread dispatch
notification in post-switch handlers (which all run with interrupts
disabled).
On all configurations, this is a serious issue for the interrupt
latency.
Update #2751
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.
Import the <arpa/inet.h> from current FreeBSD. Necessary due to changes
in <netinet/in.h>. Remove BSD hack from <arpa/inet.h>.
Clean up problems with htonl(). These functions are defined in
<arpa/inet.h>. This lead to some problems because they are defined in
<rtems/endian.h> too. Add NTOHL, ... to
<rtems/rtems_bsdnet_internal.h>.
Import the <netinet/in.h> from current FreeBSD. This allows to build
some current software (e.g. libressl).
Add legacy support like
* prototype for in_cksum(),
* IPPORT_USERRESERVED,
* deprecated IPCTL_RT* defines,
* ip_fw_chk_t and ip_fw_ctl_t,
* ip_nat_... (IP NAT hooks), and
* IP_NAT option for get/setsockopt()
to new <rtems/rtems_netinet_in.h>.
Import the <netdb.h> from current FreeBSD. This allows to build some
current software (e.g. libressl).
Add __h_errno().
Update gethostent_r() API. Linux and FreeBSD use a common API now.
Adapt the RTEMS one to provide the same one.
Match gethostbyname_r() with prototype.
A 32-bit Priority_Control limits the uptime to 49 days with a 1ms clock
tick in case the EDF scheduler is used. Increase it to 64-bit to enable
proper operation of the EDF scheduler,
Close 2173.
Commit 77ff5599e0 introduced a change in
the rtems_semaphore_create() behaviour for MrsP semaphores. The ceiling
priorities for all schedulers except the scheduler of the executing
thread are initialized to zero.
Pavel Pisa
Alexander Krutwig
Sebastian Huber
Mudit Jain
Christian Mauderer