Some UART Controllers (Synopsys DesignWare 8250) will trigger spurious interrupts when the Line Control Register (LCR) is set while the UART is busy. This patch provides the option (16550_WAIT_LCR) to wait for UART until it's not busy, before setting the LCR. (16550_WAIT_LCR is disabled by default)
This patch fixes the spurious UART interrupts for the upcoming port of NuttX to StarFive JH7110 SoC (with Synopsys DesignWare 8250 UART). [The patch is explained here](https://lupyuen.github.io/articles/plic#appendix-fix-the-spurious-uart-interrupts)
drivers/serial/uart_16550.c: If 16550_WAIT_LCR is enabled, wait until UART is not busy before setting LCR
include/nuttx/serial/uart_16550.h: Define the UART Status Register (USR) for checking if UART is busy
drivers/serial/Kconfig-16550: Added option 16550_WAIT_LCR to 16550 UART Config, disabled by default
If the shm file is removed and a subsequent close, only release shm
object, but inode is leaked. Should decrease refcount to release inode
when unmapped, that matched with refcount increase when mapped.
Another fix that remove the shm file failed.
nsh> rm /var/shm/pts_mmap_1_2_5
nsh: rm: unlink failed: 6
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
mmap establish a mapping address space that refer to a tmpfs file,
there are two issues:
1. if the tmpfs file is removed and a subsequent close(), tmpfs_close
will release the backend memory object, use after free errors occur
when operating the mapping memory. We add an extra reference to memory object,
memory will be released when there are no more mappings.
2. if unmap only a portion of the memory, fix the bug that adds another map.
Use realloc and shrink the mapping memory instead.
The fix pass LTP posix case mmap/10-1.c and mmap/12-1.c
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
No memory map count limit that will exhaust memory and cause
the system hang. Also that fix pass LTP posix case mmap/24-1.c
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
The fd of pipe type is not supported by mmap, mmap() shall failed
with ENODEV. If pipe mmap is not implemented, mmap will forward to
rammap() and get unexpected error.
Implement pipe mmap just return ENODEV. That is to pass LTP posix
test case mmap/23-1.c
https://pubs.opengroup.org/onlinepubs/9699919799/functions/mmap.html
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
If MAP_PRIVATE is specified, do not change the underlying object,
that is OK to open file with read-only permission. Change to pass:
testcases/open_posix_testsuite/conformance/interfaces/mmap/6-5.c
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
As posix spec, mmap() function shall fail with ENODEV if fd refers
to a file whose type is not supported. Change to pass ltp open_posix test:
testcases/open_posix_testsuite/conformance/interfaces/mmap/23-1.c
https://pubs.opengroup.org/onlinepubs/9699919799/functions/mmap.html
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
- Added Wi-Fi related symbols to the kernel-space linker;
- Allocate more RAM to the kernel (to be useb by the Wi-Fi driver).
- Create a specific defconfig.
Instead of setting kernel/user space instruction and data ROM as
hard-coded values on linker, set them according to the max size
of the kernel image set by CONFIG_ESP32S3_KERNEL_IMAGE_SIZE. This
is done by making KIROM, UIROM, KDROM and UDROM dependent on the
kernel size value. Also, override CONFIG_NUTTX_USERSPACE config
according to CONFIG_ESP32S3_KERNEL_IMAGE_SIZE by using a custom
PREBUILD definition.
CC: note/note_driver.c note/note_driver.c:180:19: warning: 'g_note_lock' defined but not used [-Wunused-variable]
180 | static spinlock_t g_note_lock;
|
The FIOC_FILEPATH ioctl needs rf->rf_path, which is not initialized for
dup'ed romfs file and cause problems.
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
When other code use nuttx memory manager by call mm_xx api directly,
it better to let other code to control weather dump or panic when
malloc failed.
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
Add PREBUILD definition and `prebuild` recipe to call it before
the `mkconfig` tool, at the beginning of the build process. This
`prebuild` step enables running CPU/board-specific operations
before building the firmware, like tweaking or overriding configs
that need to be set after the board configuration.
when executing ioctl AUDIOIOC_GETBUFFERINFO,the priv->pcm is still NULL,
so it will return -ENXIO,we can remove this check at the start of ioctl
and add in the case where it is used.
Signed-off-by: shipei <shipei@xiaomi.com>
The circbuf_peekat should copy valid content from the specfied position
of buffer, so skip the area from this position to the tail.
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
Comment for pcf8574_register_update() function was incorrect as it was
probably copied from different driver function.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
boards/arm/cxd56xx/drivers/sensors/bmi160_scu.c: fix incorrect comments to the Right of Statements.
drivers/sensors/ak09912.c: fix incorrect function description ak09912_putreg8 and ak09912_getreg8
When supporting high-priority interrupts, updating the
g_running_tasks within a high-priority interrupt may be
cause problems. The g_running_tasks should only be updated
when it is determined that a task context switch has occurred.
Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
