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Update #4344
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In 'testing' mode the paranoia checks found this bit asserted. The
recent linux driver (2013) mentions lists this bit as a 'phy link
status change' bit (together with (1<<16)). Thus, we accept this
as a 'known' bit now.
Update #4344
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If we have no new buffer then we must recycle/reuse the old one
and *not* return it to the user for consumption.
Update #4344
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Update #4344
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Update #4344
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Must be careful to skip empty buffers and to correctly
identify the last non-empty buffer (since that is the one
whose associated descriptor stores the head of the chain
for deferred cleanup).
Update #4344
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NOTE: apparently we now must use rtems_bsdnet_event_send(). The
combination of rtems_event_send()/rtems_bsdnet_event_receive()
apparently no longer works (rtems-5).
Update #4344
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Update #4344
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argument
Remove any calls to mii_ioctl from the low-level driver. Instead, the caller
must determine the current speed and communicate to init_hw().
Update #4344
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All low-level interfaces were moved to mv643xx_eth.h
and the latter is included by if_mve_pub.h.
Update #4344
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Update #4344
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Update #4344
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Update #4344
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Update #4344
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Update #4344
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Update #4344
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Update #4344
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Update #4344
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Do not mix checks for different error indicators (RTEMS_NOT_DEFINED and
RTEMS_INVALID_NUMBER). This simplifies the specification of
rtems_semaphore_create().
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Rejecting initially locked MrsP semaphores was due to a limitiation of
the early limitiation of the MrsP protocol. This limitation no longer
exists.
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MrsP semaphores are a generalization of the priority ceiling semaphores
for SMP configurations. Priority ceiling semaphores are required to use
the priority task wait queue discipline. Require this discipline also
for MrsP semaphores.
Close #4347.
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Close #4343.
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Move the CPU time budget to the thread configuration. This simplifies
_Thread_Initialize().
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Run the task create/construct tests also on validation test suite 1
which has exactly one processor configured.
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Signed-off-by: Eshan Dhawan <eshandhawan51@gmail.com>
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Overview
========
The errata is worked around in the kernel without requiring toolchain
modifications. It is triggered the JMPL/RETT return from trap instruction
sequence never generated by the compiler and. There are also other
conditions that must must be true to trigger the errata, for example the
instruction that the trap returns to has to be a JMPL instruction. The
errata can only be triggered if certain data is corrected by ECC
(inflicted by radiation), thus it can not be triggered under normal
operation. For more information see:
www.gaisler.com/notes
Affected RTEMS target BSPs:
* GR712RC
* UT699
* UT700/699E
The work around is enabled by defining __FIX_LEON3_TN0018 at build time.
After applying the following GCC patch, GCC will set the define when
compiling for an affected multilib:
* GR712RC (-mcpu=leon3 -mfix-gr712rc)
* UT700/UT699E (-mpcu=leon3 -mfix-ut700)
* UT699 (-mcpu=leon -mfix-ut699)
When building for another multilib and TN0018 is still required, it
is possible to enable it on the RTEMS kernel configure line using the
TARGET_CFLAGS (-D__FIX_LEON3FT_TN0018) or other by other means.
The following GCC patch sets __FIX_LEON3FT_TN0018 for the affected RTEMS
multilibs:
---------
diff --git a/gcc/config/sparc/rtemself.h b/gcc/config/sparc/rtemself.h
index 6570590..ddec98c 100644
--- a/gcc/config/sparc/rtemself.h
+++ b/gcc/config/sparc/rtemself.h
@@ -33,6 +33,8 @@
builtin_assert ("system=rtems"); \
if (sparc_fix_b2bst) \
builtin_define ("__FIX_LEON3FT_B2BST"); \
+ if (sparc_fix_gr712rc || sparc_fix_ut700 || sparc_fix_ut699) \
+ builtin_define ("__FIX_LEON3FT_TN0018"); \
} \
while (0)
---------
Workaround Implementation
=========================
In general there are two approaches that the workaround uses:
A) avoid ECC restarting the RETT instruction
B) avoid returning from trap to a JMPL instruction
Where A) comes at a higher performance cost than B), so B) is used
where posssible. B) can be achived for certain returns from trap
handlers if trap entry is controlled by assembly, such as system calls.
A)
A special JMPL/RETT sequence where instruction cache is disabled
temporarily to avoid RETT containing ECC errors, and reading of RETT
source registers to "clean" them from incorrect ECC just before RETT
is executed.
B)
The work around prevents JMPL after system calls (TA instruction) and
modifies assembly code on return from traps jumping back to application
code. Note that for some traps the trapped instruction is always
re-executed and can therefore not trigger the errata, for example the
SAVE instruction causing window overflow or an float instruction causing
FPU disabled trap.
RTEMS SPARC traps workaround implementation:
NAME NOTE TRAP COMMENT
* window overflow 1 - 0x05 always returns to a SAVE
* window underflow 1 - 0x06 always returns to a RESTORE
* interrupt traps 2 - 0x10..1f special rett sequence workaround
* syscall 3 - 0x80 shutdown system - never returns
* ABI flush windows 2 - 0x83 special rett sequence workaround
* syscall_irqdis 4 - 0x89
* syscall_irqen 4 - 0x8A
* syscall_irqdis_fp 1 - 0x8B always jumps back to FP instruction
* syscall_lazy_fp_switch 5 - 0x04 A) jumps back to FP instruction, or to
B) _Internal_error() starting with SAVE
Notes:
1) no workaround needed because trap always returns to non-JMPL instruction
2) workaround implemented by special rett sequence
3) no workaround needed because system call never returns
4) workaround implemented by inserting NOP in system call generation. Thus
fall into 1) when workaround is enabled and no trap handler fix needed.
5) trap handler branches into both 1) and returning to _Internal_error()
which starts with a SAVE and besides since it shuts down the system that
RETT should never be in cache (only executed once) so fix not necessary
in this case.
Any custom trap handlers may also have to be updated. To simplify that,
helper work around assembly code in macros are available in a separate
include file <libcpu/grlib-tn-0018.h>.
Close #4155.
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Close #4336.
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Update #4336.
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Not used by the driver itself, but shuold be correct if used by
application.
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Allows user to set SpaceWire run clock divisor for an individual port.
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Without this smp05 and smpthreadlife01 tests may fail
depending on how the boot loader initialized the GPTIMER.
Before the time counter stopped counting when reaching
zero, but tests could work since it could take 2^32 us
before stopping.
The timer driver will potentially overwrite this, but it
happens later due to the initialization order having
RTEMS_SYSINIT_CPU_COUNTER very early.
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Moves drvmgr_drivers[] from amba.c to a separate file in order
to avoid the dependecy on APBUART/GPTIMER drivers. This has
an effect when user configured not to use timer or uart
in their project.
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The descriptor table size is equal to its alignment and set when
configuring the HW IP through VHDL generics. This SW patch simply
probes the HW how large the RX/TX descriptor tables are and adjusts
accordingly.
The number of descriptors actual used are controlled by other
settings (rxDescs and txDescs) controlled by the user.
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Close #4324.
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Update #4324.
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The new GRCAN_FD IP supports CAN FD standard and is mostly backwards
compatible with GRCAN SW interface. The GRCAN driver have been extended
to support the GRCANFD IP using the same driver.
Additional functions have been added that uses a new CAN FD frame
format and read/write/baud-rate functions that supports both GRCANFD
and GRCAN. To keep the SW API fully backwards compatible with GRCAN,
the old functions remain.
Update #4324.
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Update #4324.
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Close #4323.
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Update #4323.
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Reimplemented the baud-rate algorithm from scratch to cope with
GRCAN, GRCANFD and OC_CAN devices.
Update #4323.
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When the DMA table has been allocated dynamically, the IOCTL_SET_PACKETSIZE
will trigger an issue where pDev->rx and pDev->tx are not updated with
the new DMA tables base address. Instead the old pointers are used.
There is no point in reallocting the DMA tables because there is no
configuration option to it. Therefore the DMA tables allocation is
moved to a separate function never called from SET_PACKETSIZE.
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This is enables the updated codec for GR740 and is backwards compatible
with all other versions of the IP.
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