The register context is not needed, the original idea was to provide
the user stack pointer for signal handler delivery, but the user stack
can be obtained via sp_el0 so the context registers are not needed.
SP0 is not stored upon exception entry anyways, so this code is just
completely redundant and wrong.
reason:
In SMP, when a context switch occurs, restore_critical_section is executed.
To reduce the time taken for context switching, we directly pass the required
parameters to restore_critical_section instead of acquiring them repeatedly.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
The vaddr field in TLBI means: Bits[55:12] of the virtual address to match.
This basically means the page offset of the virtual address, so the input
vaddr must be shifted to the page offset.
Reference TLBI VALE1IS register description from ARMv8-A reference manual.
The 12:0 bits in table descriptors are RES0 and AF is the 10th bit, so
it is not valid to set it in this case.
Fix this by moving AF to the common MMU_MT_NORMAL_FLAGS field
Make sure the user L1 page is updated to system memory when the kernel
mappings are copied.
Also, flush the I-cache when switching address environments.
Make this_cpu is arch independent and up_cpu_index do that.
In AMP mode, up_cpu_index() may return the index of the physical core.
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
In corner case, the pending ISR will be triggered immediately
after enable the IRQ, this PR will setting CPU affinity first
to avoid routing the unexpected IRQ to other CPUs.
Signed-off-by: chao an <anchao@lixiang.com>
Only in the non-critical region， nuttx can the respond to the irq and not hold the lock
When returning from the irq, there is no need to check whether the lock needs to be released
we also need keep restore_critical_section in svc call
test:
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ 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>
This is the initial version for kernel mode build on the arm64 platform.
It works much in the same way as the risc-v implementation so any
highlights can be read from there.
Features that have been tested working:
- Creating address environments
- Loading init (nsh) from elf file
- Booting to nsh
- Starting other processes from nsh
- ostest runs to completion
Features that are not tested / do not work:
- SHM / shared memory support
- Kernel memory mapping (MM_KMAP)
- fork/vfork
An example qemu target is provided as a separate patch:
tools/configure.sh qemu-armv8a:knsh
Why? Because this allows optimizing the user system call path in such
a way that the parameter registers don't have to be read from the saved
integer register context when the system call is executed.
"/mnt/yang/qixinwei_vela_warnings/nuttx/include/nuttx/spinlock.h", line 252: warning #76-D:
argument to macro is empty
SP_DSB();
^
"/mnt/yang/qixinwei_vela_warnings/nuttx/include/nuttx/spinlock.h", line 261: warning #76-D:
argument to macro is empty
SP_DMB();
^
"/mnt/yang/qixinwei_vela_warnings/nuttx/include/nuttx/spinlock.h", line 252: warning #76-D:
argument to macro is empty
SP_DSB();
^
"/mnt/yang/qixinwei_vela_warnings/nuttx/include/nuttx/spinlock.h", line 261: warning #76-D:
argument to macro is empty
SP_DMB();
^
"/mnt/yang/qixinwei_vela_warnings/nuttx/include/nuttx/spinlock.h", line 296: warning #76-D:
argument to macro is empty
SP_DSB();
^
Signed-off-by: yanghuatao <yanghuatao@xiaomi.com>
when the thread to backtrace is exiting, get_tcb and up_backtrace in
different critical section may cause try to dump invalid pointer, have
to ensure the nxsched_get_tcb and up_backtrace inside same critical
section procedure.
Signed-off-by: buxiasen <buxiasen@xiaomi.com>
This adds enablers for setting various clocks to some default
values. Also, this provides helpers to grant nonsecure access
to a number of clocks. Bootloader may utilize these to make
the system boot in a deterministic manner.
Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
In the algorithm there is a subtraction (int - unsigned), which results (potentially overflowed)
unsigned.
Passing this to macro ABS and the assigning to int doesn't work ( unsigned is always >= 0 ).
Fix this by replacing (dangerous) ABS macro with stdlib's standard "int abs(int)"
and change the substraction to (int - int).
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
This is an initial FlexSPI SPI NOR MTD driver for IMX9
This supprts M25P SPI NOR on FlexSPI for now, and can later be extended to other
SPINOR devices if needed. The following configurations are needed to use this driver:
CONFIG_IMX9_FLEXSPI_NOR=y
CONFIG_MTD_M25P=y
In addition, board initialization logic needs to call the imx9_flexspi_nor_initialize
to receive a pointer to the mtd device.
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
Co-authored-by: Jouni Ukkonen <jouni.ukkonen@unikie.com>
During the boot phase, when we transition from tee smp to ap smp, we can use a busy waitflag to wait for the completion of the initialization of ap's core0
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>
