Add sem_wait fast operations, use atomic to ensure
atomicity of semcount operations, and do not depend
on critical section.
Test with robot:
before modify:
nxmutex_lock cost: 78 ns
nxmutex_unlock cost: 82 ns
after modify:
nxmutex_lock cost: 28 ns
nxmutex_unlock cost: 14 ns
Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
If the current platform does not require a large PATH_MAX size support and toolchain supports alloca(),
we could turn off this option to improve performance.
Signed-off-by: chao an <anchao@lixiang.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
define NuttX local NuttX-PublicDomain identifier
“Public Domain” is a concept distinct from copyright licensing;
it generally means that the work no longer has any copyright protection
or ownership, and therefore requires no license permission in order to
use, copy, modify, distribute, perform, display, etc.
In the United States – and many jurisdictions – copyright protections
attach automatically to creative works upon creation if they satisfy
certain minimum criteria.
“Public Domain” would thus represent a significant change to the legal
status of the work.
The rules around “Public Domain” often vary or are unspecified
jurisdiction to jurisdiction. Adding to the confusion, some
jurisdictions may not even recognize the concept of “Public Domain”
(or similar). As such, a license may nevertheless be required or implied
in these cases. Even in the U.S., there is no clear,
officially-sanctioned procedure for affirmatively placing
copyright-eligible works into the “Public Domain” aside from natural
statutory expiration of copyright. The bottom-line is, there are few if
any objective, brightline rules for proactively placing
copyright-eligible works into the Public Domain that we can broadly
rely on.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
define NuttX local NuttX-PublicDomain identifier
“Public Domain” is a concept distinct from copyright licensing;
it generally means that the work no longer has any copyright protection
or ownership, and therefore requires no license permission in order to
use, copy, modify, distribute, perform, display, etc.
In the United States – and many jurisdictions – copyright protections
attach automatically to creative works upon creation if they satisfy
certain minimum criteria.
“Public Domain” would thus represent a significant change to the legal
status of the work.
The rules around “Public Domain” often vary or are unspecified
jurisdiction to jurisdiction. Adding to the confusion, some
jurisdictions may not even recognize the concept of “Public Domain”
(or similar). As such, a license may nevertheless be required or implied
in these cases. Even in the U.S., there is no clear,
officially-sanctioned procedure for affirmatively placing
copyright-eligible works into the “Public Domain” aside from natural
statutory expiration of copyright. The bottom-line is, there are few if
any objective, brightline rules for proactively placing
copyright-eligible works into the Public Domain that we can broadly
rely on.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
define NuttX local NuttX-PublicDomain identifier
“Public Domain” is a concept distinct from copyright licensing;
it generally means that the work no longer has any copyright protection
or ownership, and therefore requires no license permission in order to
use, copy, modify, distribute, perform, display, etc.
In the United States – and many jurisdictions – copyright protections
attach automatically to creative works upon creation if they satisfy
certain minimum criteria.
“Public Domain” would thus represent a significant change to the legal
status of the work.
The rules around “Public Domain” often vary or are unspecified
jurisdiction to jurisdiction. Adding to the confusion, some
jurisdictions may not even recognize the concept of “Public Domain”
(or similar). As such, a license may nevertheless be required or implied
in these cases. Even in the U.S., there is no clear,
officially-sanctioned procedure for affirmatively placing
copyright-eligible works into the “Public Domain” aside from natural
statutory expiration of copyright. The bottom-line is, there are few if
any objective, brightline rules for proactively placing
copyright-eligible works into the Public Domain that we can broadly
rely on.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
define NuttX local NuttX-PublicDomain identifier
“Public Domain” is a concept distinct from copyright licensing;
it generally means that the work no longer has any copyright protection
or ownership, and therefore requires no license permission in order to
use, copy, modify, distribute, perform, display, etc.
In the United States – and many jurisdictions – copyright protections
attach automatically to creative works upon creation if they satisfy
certain minimum criteria.
“Public Domain” would thus represent a significant change to the legal
status of the work.
The rules around “Public Domain” often vary or are unspecified
jurisdiction to jurisdiction. Adding to the confusion, some
jurisdictions may not even recognize the concept of “Public Domain”
(or similar). As such, a license may nevertheless be required or implied
in these cases. Even in the U.S., there is no clear,
officially-sanctioned procedure for affirmatively placing
copyright-eligible works into the “Public Domain” aside from natural
statutory expiration of copyright. The bottom-line is, there are few if
any objective, brightline rules for proactively placing
copyright-eligible works into the Public Domain that we can broadly
rely on.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
define NuttX local NuttX-PublicDomain identifier
“Public Domain” is a concept distinct from copyright licensing;
it generally means that the work no longer has any copyright protection
or ownership, and therefore requires no license permission in order to
use, copy, modify, distribute, perform, display, etc.
In the United States – and many jurisdictions – copyright protections
attach automatically to creative works upon creation if they satisfy
certain minimum criteria.
“Public Domain” would thus represent a significant change to the legal
status of the work.
The rules around “Public Domain” often vary or are unspecified
jurisdiction to jurisdiction. Adding to the confusion, some
jurisdictions may not even recognize the concept of “Public Domain”
(or similar). As such, a license may nevertheless be required or implied
in these cases. Even in the U.S., there is no clear,
officially-sanctioned procedure for affirmatively placing
copyright-eligible works into the “Public Domain” aside from natural
statutory expiration of copyright. The bottom-line is, there are few if
any objective, brightline rules for proactively placing
copyright-eligible works into the Public Domain that we can broadly
rely on.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
define NuttX local NuttX-PublicDomain identifier
“Public Domain” is a concept distinct from copyright licensing;
it generally means that the work no longer has any copyright protection
or ownership, and therefore requires no license permission in order to
use, copy, modify, distribute, perform, display, etc.
In the United States – and many jurisdictions – copyright protections
attach automatically to creative works upon creation if they satisfy
certain minimum criteria.
“Public Domain” would thus represent a significant change to the legal
status of the work.
The rules around “Public Domain” often vary or are unspecified
jurisdiction to jurisdiction. Adding to the confusion, some
jurisdictions may not even recognize the concept of “Public Domain”
(or similar). As such, a license may nevertheless be required or implied
in these cases. Even in the U.S., there is no clear,
officially-sanctioned procedure for affirmatively placing
copyright-eligible works into the “Public Domain” aside from natural
statutory expiration of copyright. The bottom-line is, there are few if
any objective, brightline rules for proactively placing
copyright-eligible works into the Public Domain that we can broadly
rely on.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
S32C1I instructions may target cached, cache-bypass,
and data RAM memory locations. S32C1I instructions
are not permitted to access memory addresses in data ROM,
instruction memory or the address region allocated to
the XLMI port. Attempts to direct the S32C1I at these
addresses will cause an exception.
Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
Modify the kernel to use only atomic_xx and atomic64_xx interfaces,
avoiding the use of sizeof or typeof to determine the type of
atomic operations, thereby simplifying the kernel's atomic
interface operations.
Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
Errors
1. Not return int value
usbmsc_main.c: In function 'msconn_main':
usbmsc_main.c:645:55: error: expected expression before ';' token
645 | ret = usbtrace_enumerate(usbmsc_enumerate, NULL);
2. Error argument number
CC: usbmsc_main.c usbmsc_main.c: In function 'msconn_main':
usbmsc_main.c:645:54: error: macro "usbtrace_enumerate" passed 2 arguments, but takes just 1
645 | ret = usbtrace_enumerate(usbmsc_enumerate, NULL);
Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
right now it is only possible to change the delivered power on the fly
by
1. selecting PDO2 slot
2. write to POO2
3. renegotiate power delivery by sw reset command
reason:
Due to incomplete handling of spinlock_t in arch/spinlock.h,
it should not be used directly by external code.
Furthermore, because pthread.h and nuttx/spinlock.h have a circular
dependency, pthread.h cannot successfully include nuttx/spinlock.h.
Therefore, we have split spinlock_type.h from spinlock.h.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
1 There is a similar PR, https://github.com/apache/nuttx/pull/14079,
2 Currently, no one is using recursive locks with write_lock_irqsave/read_lock_irqsave.
3 Nested spinlock is harmful, prone to abuse and leading to a decline in code quality and performance
4 Nested spinlock is also not available in Linux.
5 In our future plans, nested usage of enter_critical_section and spin_lock_irqsave will also be removed.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
1: spin_lock_init and spin_initialize have similar functionalities.
2: spin_lock and spin_unlock should be called in matching pairs.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
up_set_current_regs initially had two functions:
1: To mark the entry into an interrupt state.
2: To record the context before an interrupt/exception. If we switch to
a new task, we need to store the upcoming context regs by calling up_set_current_regs(regs).
Currently, we record the context in other ways, so the second function is obsolete. Therefore,
we need to rename up_set_current_regs to better reflect its actual meaning, which is solely to mark an interrupt.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
In devices without storage media, you can export data to the
command line and then generate the corresponding gcda file
It can save the result output by calling __gcov_info_to_gcda
The usage is similar to:
https://gcc.gnu.org/onlinedocs/gcc/Freestanding-Environments.html#Profiling-and-Test-Coverage-in-Freestanding-Environments
Usage:
./tools/configure.sh qemu-armv7a:nsh
Modify the configuration
+CONFIG_COVERAGE_ALL=y
+CONFIG_COVERAGE_MINI=y
+CONFIG_SYSTEM_GCOV=y
Run:
qemu-system-arm -cpu cortex-a7 -nographic -smp 4 \
-machine virt,virtualization=off,gic-version=2 \
-net none -chardev stdio,id=con,mux=on -serial chardev:con \
-mon chardev=con,mode=readline -kernel ./nuttx/nuttx -semihosting -s | tee gcov.txt
./nuttx/tools/gcov_convert.py -i ./gcov.txt
./nuttx/tools/gcov.sh -t arm-none-eabi-gcov
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
Now the HAVE_PFINET(6)_SOCKETS depends on NET_TCP/UDP_HAVE_STACK, which
is previously defined in net/ folder and cannot be included.
Considering many places use this check, maybe moving them to netconfig.h
could be better.
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
reason:
Since we decoupled counting and sem count,
we changed the meanings of three key global variables:
g_iob_count: A positive number indicates the available number
of IOBs, while a negative number indicates the number of waiters in iob_alloc (when throttle == false).
g_throttle_wait: Represents the number of waiters in
iob_alloc (when throttle == true), and it will not be negative.
g_qentry_wait: Represents the number of waiters for
qentry, and it will not be negative.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
new implementation does not requires the use of enter_critical_section,
so the source code needs to be moved to user space
This reverts commit d189a86a35.
syslog_putc() have a lot of duplicate logic with syslog_write().
remove syslog_putc() and reuse syslog_write() to simplify syslog printing.
Signed-off-by: chao an <anchao@lixiang.com>
reason:
When entering an exception or interrupt, there are two sets of registers:
one is the "running regs", which we need to save,
and the other is the "ready to running regs", which we may soon use.
For consistency in logic, we can always store the "running regs" in the regs field of g_running_tasks,
otherwise it may lead to errors in the storage location of the "running regs."
When we need to access the "running regs," we should uniformly retrieve them from the regs field of g_running_tasks.
As the next step, we will rename the set_current_regs/up_current_regs functions
for each architecture to more appropriate names, solely for the purpose of identifying interrupts.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
We decouple semcount from business logic by using an independent counting variable,
which allows us to remove critical sections in many cases.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Some armv7-m-based SoCs do not work with atomic instructions,
even though armv7-m supports them.
To avoid using atomic instructions generated by gcc,
CONFIG_LIBC_ARCH_ATOMIC is newly introduced with which
arch_atomic.c is linked explicitly.
However, the function names need to be changed to avoid
build errors, since the functions described in stdatomic.h
are gcc built-in and inlined when the code is compiled.
About libcxx with CONFIG_LIBC_ARCH_ATOMIC, it still
does not work. It is also needed to call nx_atomic_ ver
instead of __atomic ver in
libcxx/include/__atomic/cxx_atomic_lmpl.h.
Signed-off-by: Takuya Miyasita <Takuya.Miyashita@sony.com>
