The function is not relevant any longer, remove it. Also remove
save_addrenv_t, the parameter taken by up_addrenv_restore.
Implement addrenv_select() / addrenv_restore() to handle the temporary
instantiation of address environments, e.g. when a process is being
created.
This is preparation for moving address environments out of the group
structure into the tcb.
Why move ? Because the group is destroyed very early in the exit phase,
but the MMU mappings are needed until the context switch to the next
process is complete. Otherwise the MMU will lose its mappings and the
system will crash.
The dependency should be vice versa; the MM_SHM should depend on the
existence of the virtual memory range allocator.
Create a new CONFIG flag CONFIG_ARCH_VMA_MAPPING, which will define that
there is a virtual memory range allocator. Make MM_SHM select that flag
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
N/A
Summary:
Arm64 support for NuttX, Features supported:
1. Cortex-a53 single core and SMP support: it's can run into nsh shell at
qemu virt machine.
2. qemu-a53 board configuration support: it's only for evaluate propose
3. FPU support for armv8-a: FPU context switching at NEON/floating-point
TRAP is supported.
4. psci interface, armv8 cache operation(data cache) and smccc support.
5. fix mass code style issue, thank for @xiaoxiang781216, @hartmannathan @pkarashchenko
Please refer to boards/arm64/qemu/qemu-a53/README.txt for detail
Note:
1. GCC MACOS issue
The GCC 11.2 toolchain for MACOS may get crash while compiling
float operation function, the following link describe the issue
and give analyse at the issue:
https://bugs.linaro.org/show_bug.cgi?id=5825
it's seem GCC give a wrong instruction at certain machine which
without architecture features
the new toolchain is not available still, so just disable the MACOS
cibuild check at present
Signed-off-by: qinwei1 <qinwei1@xiaomi.com>
