Optimize crc32 standard(poly:0x04C11DB7) and crc32
castagnoli(poly:0x1EDC6F41) with arm crc32 extension instructions.
For example, crc32 standard caculates(lookup crc32 table) 1812 bytes data,
reduced the time from 118 us to 14 us through optimization.
Performance improved ~700%
Signed-off-by: Jinliang Li <lijinliang1@lixiang.com>
i couldn't find any documenation about this attribute.
this comment is purely based on my reading of the code.
Signed-off-by: YAMAMOTO Takashi <yamamoto@midokura.com>
This implements similar functionality than CONFIG_FAT_FORCE_INDIRECT
because in some use cases (e.g. when CONFIG_BUILD_KERNEL) it is not possible to
write directly from user buffer.
Signed-off-by: Jani Paalijarvi <jani.paalijarvi@unikie.com>
In the arm_el_init function, the FPU might be used, for example, the
assembly optimization of memcpy in arm_tcm_load uses FPU and NEON
instructions and registers.
Therefore, it's important to initialize the
FPU as early as possible to prevent system hangs that could occur if the
FPU is used without being initialized.
Signed-off-by: Jinliang Li <lijinliang1@lixiang.com>
fix printf warning:
chip/esp32s3_wdt_lowerhalf.c:497:17: error: format '%u' expects argument of
type 'unsigned int', but argument 4 has type 'long unsigned int'
Signed-off-by: raiden00pl <raiden00@railab.me>
fix printf warning:
chip/esp32s2_wdt_lowerhalf.c:493:17: error: format '%u' expects argument of
type 'unsigned int', but argument 4 has type 'long unsigned int'
Signed-off-by: raiden00pl <raiden00@railab.me>
fix printf warning:
chip/esp32s3_ble_adapter.c:1065:13: error: format '%u' expects argument of
type 'unsigned int', but argument 3 has type 'long unsigned int'
Signed-off-by: raiden00pl <raiden00@railab.me>
fix printf warning:
chip/esp32_ble_adapter.c:1137:13: error: format '%u' expects argument of
type 'unsigned int', but argument 3 has type 'long unsigned int'
Signed-off-by: raiden00pl <raiden00@railab.me>
On AVR architecture, the compiler apparently sometimes truncates NSEC_PER_TICK
to 16bit value, leading to clock_time2ticks returning incorrect results. This
was encountered while attempting to add tickless OS support for AVR
architecture but seemed to affect non-tickless mode of operation as well.
This patch marks NSEC_PER_USEC (and to be safe, USEC_PER_MSEC and MSEC_PER_SEC
too) as long.
This commit initialized framebuffer early-print if `CONFIG_MULTBOOT2_FB_TERM` is defined. This enabled `early_kprintf` to output debug information using framebuffer.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This commit fixed `fb_putc` for early-print.
- Modified fb_putc to return an int instead of void.
- Handled error cases where the character is not found by replacing it with a '.'.
- Ensured cursor position is updated correctly after each character is processed.
- Fixed above 4G framebuffer memory mapping.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
The default frequency for the SPI flash chip on ESP32-H2 is 64MHz.
Although it was being set to 48MHz, this isn't a valid value. The
device, however, must be flashed using 48MHz when 64MHz is set.
Remove call to enter_critical_section (big kernel lock) and replace it
with a smaller lock to protect the USB clock and its reference counter.
Signed-off-by: Ville Juven <ville.juven@unikie.com>
If the remote end just closes an endpoint and no longer handles it,
the system is prone to intensive cpu polling via mpfs_write_tx_fifo()
especially if the device side doesn't know a thing about what the
remote did.
Fix this by marking the EP as dead, which will skip all writes causing
unnecessary polling. The EP is back in business if the remote end
sends some data (rx) or the connection is re-established.
Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
Signed-off-by: Ville Juven <ville.juven@unikie.com>
This avoids unnecessary syscalls in memory protected builds, when mutex
lock/unlock can be done with only atomic counter access
Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
When the semaphore priority flags is set to NONE, and the semaphore
is a mutex, the fast locking path can be used, even when
priority inheritance or priority protect are enabled globally.
Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
This patch adds support for the NAU7802 24 bit ADC from Nuvoton.
Please read the documentation for more details.
Signed-off-by: Daniel Byshkin <online@bskdany.com>
This commit enables the SPI Flash's MTD block driver. This block
driver enables testing the SPI Flash device without any associated
filesystems.
Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
This commit enables the SPI Flash's MTD block driver. This block
driver enables testing the SPI Flash device without any associated
filesystems.
Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
This commit enables the SPI Flash's MTD block driver. This block
driver enables testing the SPI Flash device without any associated
filesystems.
Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
This commit enables the SPI Flash's MTD block driver. This block
driver enables testing the SPI Flash device without any associated
filesystems.
Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
This commit enables the SPI Flash's MTD block driver. This block
driver enables testing the SPI Flash device without any associated
filesystems.
Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
This commit enables the SPI Flash's MTD block driver. This block
driver enables testing the SPI Flash device without any associated
filesystems.
Signed-off-by: Tiago Medicci Serrano <tiago.medicci@espressif.com>
