cpu0 cpu1:
user_main
signest_test
sched_unlock
nxsched_merge_pending
nxsched_add_readytorun
up_cpu_pause
arm_sigdeliver
enter_critical_section
Reason:
In the SMP, cpu0 is already in the critical section and waiting for cpu1 to enter the suspended state.
However, when cpu1 executes arm_sigdeliver, it is in the irq-disabled state but not in the critical section.
At this point, cpu1 is unable to respond to interrupts and
is continuously attempting to enter the critical section, resulting in a deadlock.
Resolve:
adjust the logic, do not entering the critical section when interrupt-disabled.
test:
We can use qemu for testing.
compiling
make distclean -j20; ./tools/configure.sh -l qemu-armv8a:nsh_smp ;make -j20
running
qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic -machine virt,virtualization=on,gic-version=3 -net none -chardev stdio,id=con,mux=on -serial chardev:con -mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
as we always want to take critical_section, and it is not long time job,
take mutex is not necessary, use spinlock_irq_save as a replace is
better, dont't have to take global critial_section in pm.
Signed-off-by: buxiasen <buxiasen@xiaomi.com>
This adds pre-allocation and dynamic allocations for sigactions.
Current behavior can be acheived by setting SIG_ALLOC_ACTIONS to
a number larger than 1.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
As suggested in PR:12530, changed the default names of ESP32S3WROOM chips to ESP32S3WROOM1N4,
ESP32S3WROOM2N16R8, ESP32S3WROOM2N32R8, ESP32S3MINI1N8.
Also regenerated all the defconfigs for board configurations.
Added a custom ESP32S3 module for custom flash configurations.
Declared ESP32S3_PSRAM_8M variable with prompt
this_task() is a function call that involves disabling interrupts and this_cpu().
Since restore_critical_section is always called in an interrupt-disabled context,
there's no need to disable interrupts again. Therefore, to save time and achieve
the same effect, I directly call tcb = current_task(me) instead of tcb = this_task().
Signed-off-by: hujun5 <hujun5@xiaomi.com>
we can use g_cpu_lockset to determine whether we are currently in the scheduling lock,
and all accesses and modifications to g_cpu_lockset, g_cpu_irqlock, g_cpu_irqset
are in the critical section, so we can directly operate on it.
test:
We can use qemu for testing.
compiling
make distclean -j20; ./tools/configure.sh -l qemu-armv8a:nsh_smp ;make -j20
running
qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic -machine virt,virtualization=on,gic-version=3 -net none -chardev stdio,id=con,mux=on -serial chardev:con -mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
- In some cases, an operational Ethernet MAC may have no PHY, for example
when the system has a direct RMII MAC-to-MAC link.
- New config option STM32H7_NO_PHY
- With this option, PHY-specific code in the ethernet driver is not built
- This option is inherently incompatible with autonegotiation and speed and
duplex settings must be compiled in
To simplify processing, the existed SBI function code is just
invoking the ecall and return the error value. This omits
potential return value in "a1", which is defined in SBI doc.
Add the "sbiret" struct so it can handle all the return value.
In addition, there are some minor improvement:
1. move the SBI related interface to a separate file to make it clean.
2. add all necessary SBI ecall interface macro until version 2.0.
3. add an utilty function to convert sbi error numner to standard
error number.
Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
This revises `getregXX` and `setregXX` for rv64ilp32 to overcome
the limitation of compiler generated addresses and reach devices
in a larger range.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
This PR adds support for Milk-V Duo S 64-bit RISC-V SBC, based on SOPHGO SG2000 SoC (T-Head C906 Core). Most of the code is derived from NuttX for Ox64 BL808. The source files are explained in the articles here: https://github.com/lupyuen/nuttx-sg2000
Modified Files:
`boards/Kconfig`: Added Milk-V Duo S board
`arch/risc-v/src/sg2000/sg2000_timerisr.c`: Fixed MTIMER_FREQ for sleep() to work correctly
New Files in boards/risc-v/sg2000/milkv_duos:
`src/sg2000_appinit.c`: Startup Code
`include/board.h`: Milk-V Duo S Definitions
`include/board_memorymap.h`: Memory Map
`src/etc/init.d/rc.sysinit`, `rcS`: Startup Script
`src/.gitignore`: Ignore the tmp filesystem
`scripts/ld.script`: Linker Script
`scripts/Make.defs`: Milk-V Duo S Makefile
`src/Makefile`: Milk-V Duo S Makefile
`Kconfig`: Milk-V Duo S Config
`configs/nsh/defconfig`: Build Config for `milkv_duos:nsh`
Updated Documentation:
`platforms/risc-v/sg2000/index.rst`: New page for SOPHGO SG2000 SoC
`platforms/risc-v/sg2000/boards/milkv_duos/index.rst`: Building and booting NuttX for Milk-V Duo S
