Remove forced overwrite which leads to file data corruption. The logic
to determine a forced overwrite was fundamentally broken. For simplity,
disable this feature.
Update #2622.
It is all right in case the result uses the full destination buffer.
Without this fix the handling of a maximum 8.3 short file name is
broken.
Update #2928.
Perform a context-dependent deferred location release to avoid a
deadlock on the file system instance locks, for example during a
chdir().
Update #2936.
Check that no ask help request is registered during unblock and yield
scheduler operations. There is no need to ask for help if a scheduled
thread yields, since this is already covered by the pre-emption
detection.
Update #2556.
Use r8 instead of r5 to slightly optimize _CPU_Context_switch(). It is
not a big deal, however, we already assume r12 is used by
_CPU_Context_switch(). Treat r5 the in same way.
The driver already was developed with SMP in mind however SMP was
disabled waiting for final fixups and testing.
The new function to control the affinity of the ISR was added
but does not work for now since the LEON BSP does not reroute
IRQs between CPUs during run-time:
grspw_isr_affinity()
In shared interrupt systems it might be a problem to handle the interrupt
regardless of the interrupt is enabled. Now the same approach to the
DMA RX/TX interrupt in the ISR is taken.
This patch introduces some new options to let the user control when
the ISR shall disable DMA RX/TX interrupt. The ISR can be set in three
modes when a RX/TX DMA interrupt is asserted:
1) ISR will always clear both RX/TX DMA interrupt enable. (DEFAULT).
2) ISR will never never RX or TX DMA interrupt enable, ISR will
leave RX/TX DMA interrupt enable untouched.
3) ISR will clear the interrupt enable(s) causing the interrupt,
this allows separate RX and TX IRQ handling.
This patch is backwards compatible since default mode 1) is activated
when the grspw_dma_config.flags DMAFLAGS2_IRQD field is 0.
Added new function:
* grspw_dma_ctrlsts() - Read value of DMA CTRL/STS reg.
* grspw_dma_enable_int() - re-enable interrupt, used when
implementing a custom work-task.
