This adds the possibility to open an I2C bus with O_NONBLOCK (or set it
later via fcntl) to get non-blocking transmissions. This means that if
the bus is busy, a read, write or transfer ioctl will return with a
EAGAIN errno.
The write to RBAR didn't have the valid flag set. Therefore the write to
RASR had an influence on the previously set region. That means for
example that if Region 0 had been enabled but 1 should be disabled due
to a size of 0, the previous code would have disabled region 0 instead.
This patch fixes that behaviour.
Close#4450
Get rid of the hack to output into the idle stack during the early system
initialization. This fixes also a couple of test program failures which fail
due to missing output.
Make the initialization of the per-CPU data optional.
Change license to BSD-2-Clause according to file history and
re-licensing agreement.
Update #3053.
Directly initialize the memory in the start sequence defined by start.S
instead of using a system initialization handler. This avoids using the
global variable rdb_start which used a memory location which was shared
with _ERC32_MEC_Timer_Control_Mirror. This change makes it possible to
use _Memory_Allocate() even before the system initialization is started.
Change license to BSD-2-Clause according to file history and
re-licensing agreement.
Update #3053.
Initialize the stacks for all processors in one place. Do not rely on
Per_CPU_Control::interrupt_stack_high and directly use the statically
allocated interrupt stack area.
Remove the support to load the data section and rely on the boot loader. The
code is an artifact from the old erc32 days, when we would boot and execute
from ROM and the .data had to be copied over to RAM. With leon1/2/3, this is
not used anymore as a boot loader is made from the RAM image using a custom
tool (mkprom).
In SMP configurations, this support was also broken since LEON3_Boot_Cpu
(in the data section due to the -1 initialization value) was used quite
early in the start sequence.
If the data copy is really necessary, then an application can still add this
step as a very early system initialization step, since boot_card() and the
system initialization loop does not use initialized read-write data (only
read-only and BSS data). However, the SMP startup would still not work in this
case. A boot loader is a better place to load the sections.
Set Thread_queue_Context::timeout_absolute in
_Thread_queue_Context_set_timeout_argument() to avoid using it uninitialized.
The bug was introduced by a89ecaa1a9.
A warning was present when building RTEMS that stated that the argument
for malloc() exceeded the maximum object size. To get rid of this, I
changed many places where 'int' was being used to 'size_t'.
The addition of the entire *utime*() family of functions resulted
in this call returning ENOENT not ENXIO. This is better aligned
with the POSIX definition of the methods.
Created futimens.c and utimensat.c to add support for the POSIX
methods futimens() and utimensat().
utime() and utimes() are considered obsolote by POSIX, but RTEMS
will continue to support them.
Closes#4396
Add the BSPs for running on the ZU3EG Ultrascale+ Zynq MPSoC and alter
the option defaults necessary for them to run properly using the
standard BOOT.BIN configured for PetaLinux that comes in the Out-of-Box
package.
Currently, the AArch64 BSPs have a hard time running on real hardware
without building the toolchain and the bsps with -mstrict-align in
multiple places. Configuring the MMU on these chips allows for unaligned
memory accesses for non-device memory which avoids requiring strict
alignment in the toolchain and in the BSPs themselves.
In writing this driver, it was found that the synchronous exception
handling code needed to be rewritten since it relied on clearing SCTLR_EL1 to
avoid thread stack misalignments in RTEMS_DEBUG mode. This is now
avoided by exactly preserving thread mode stack and flags and the new
implementation is compatible with the draft information provided on the
mailing list covering the Exception Management API.
The default available RAM on the A53 BSP is quite small at 8MB. This
bumps that to 128MB to avoid allocation failures in tmcontext01 caused
by large allocations on a cache size of 16MB reported by the system
registers in QEMU.
