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Move this diagnostic function to a separate file since it does not
provide a core function of the system.
Change license to BSD-2-Clause according to file history and
re-licensing agreement.
Update #3053.
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Move clock_nanosleep() to a separate file to avoid a dependency on errno
which pulls in the Newlib reentrancy support. This is an issue since
most parts which are pulled in cannot be garbage collected by the linker
due to the system initialization linker set.
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The sizes are configurable via fuses or per software via some registers.
At the moment the registers are not changed. Changing the registers
destroys data stored in the RAM areas (like application code or data).
So either the fuses or some bootloader should be used to set them before
the application starts.
This also adds an OCRAM only linker command file.
Update #4180
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Add a library for support functions used by validation tests. Rename
tc-support.* to tx-support.* since this file does not contain test
cases.
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Rename _Stack_Free_nothing() in _Objects_Free_nothing() to make it
reusable for the message queue buffers.
Update #4007.
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Update #3866.
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This may reduce the code size a bit.
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The "powerpc/shared/console" code has the start-up console value fixed
at 9600 baud. This changes the hard-wired constant "9600" in the code
to the configuration setting "BSP_CONSOLE_BAUD" and adds configuration
support in both the "waf" and the legacy configuration systems.
Note that the VME BSPs beatnik, mvme3100, and mve5100 can be improved
by adding a "mvmexxxx" BSP family. This configuration change, as well
as future configuration changes, could then be made in a "grp.yml" file.
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Now using default pins
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Move rtems_calloc() since it only depends on rtems_malloc(). This may
make it easier to customize the heap allocator.
Change licence to BSD-2-Clause according to file history.
Update #3053.
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The links are already in spec/build/bsps/arm/stm32h7/grp.yml.
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This reverts commit 3299dda2454a8847c670a732f6c12ef1f2cc5dd0.
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Replace Objects_Name_or_id_lookup_errors with new Status_Control codes.
Get rid of the _Status_Object_name_errors_to_status lookup table.
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Update #4372
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Updates #4321
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The following files have been ported
1) ti_pinmux.c
2) ti_pinmux.h
3) am335x_scm_padconf.c
4) am335x_scm_padconf.h
Update #3784
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Detects the SOC type using FDT and also replaces the ti_cpuid.h
header in FreeBSD with custom one.
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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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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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Close #4324.
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Update #4324.
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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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Updates #4320
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This enables several testsuites that were initially disabled during
development.
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The current ZynqMP BSPs don't have _qemu in their name as do all other
RTEMS BSPs that are specifically made to run on QEMU. This fixes the
naming for those ZynqMP BSP variants for easier identification.
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AArch64 on hardware is often started at EL2 instead of EL1 from either
u-boot or a first stage bootloader. This allows RTEMS to drop from EL2
execution to EL1 to operate as normal.
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Remove usage of SUBALIGN() in aarch64 linkcmds which works around a
difference in behavior on AArch64 platforms. This is no longer necessary
since alignment is now enforced explicitly.
Closes #4178.
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Closes #4179.
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Check for an integer overflow. Add a validation test for task create
errors.
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