* [bsp] rpi 4b smart & rtos fixups

* [format] remove spaces & modify readme

* [bsp] update rpi4b readme

* [components/drivers][touch]删除多余的touch.h

* 将touc.h替换为rtdevice.h

rt_ssize_t can give negative error code, which follows the unix style correctly

* Add ADT Kconfig and fix MMU kconfig issue in Cortex-A

* [BSP] enable ADT

synchronize virtual memory system works.
adding kernel virtual memory management layer for page-based MMU enabled architecture
porting libcpu MMU codes
porting lwp memory related codes

* [smart/aarch64] sync aarch64

* [dfs] sync cromfs

* [rt-smart]Weaken RT_USING_LWP, use RT_USING_SMART as macro configuration

* [format] fix some format issue.

* Synchronize the code of the rt mart branch to the master branch.
  * TTY device
  * Add lwP code from rt-smart
  * Add vnode in DFS, but DFS will be re-write for rt-smart
  * There are three libcpu for rt-smart:
    * arm/cortex-a, arm/aarch64
    * riscv64
Co-authored-by: NRbb666 <zhangbingru@rt-thread.com>
Co-authored-by: Nzhkag <zhkag@foxmail.com>

* [bsp][sconscript] 整理统一sconscript格式

* update

* update

* [bsp/raspi3-32] fix some bug of funtion '__rt_ffs'

* Update trap.c
Co-authored-by: Man, Jianting (Meco) <920369182@qq.com>

* [rtc] use gmtime_r to replace gmtime

* [libcpu/aarch64] add smp support

* [libcpu/aarch64] rt_hw_trap_irq get irq instead of iar when using gicv2

* [libcpu/aarch64] disable irq/fiq when switch thread

* [libcpu/aarch64] add gtimer frq set and stack align

* [libcpu/aarch64] add gicv3 support and bsp/rockchip/rk3568

* [libcpu/aarch64] add smp support

* [libcpu/aarch64] rt_hw_trap_irq get irq instead of iar when using gicv2

* [libcpu/aarch64] disable irq/fiq when switch thread

* [libcpu/aarch64] add gtimer frq set and stack align

* [libcpu/aarch64] add smp support
* [libcpu/aarch64] rt_hw_trap_irq get irq instead of iar when using gicv2

- 移除2.0.2，该版本存在几个重要的bug，已经在2.0.3中修复，作者强烈建议更新
- 将部分bsp由2.0.2调整为2.0.3

* [console] 解决在没有定义RT_USING_DEVICE的情况下使用device报错的问题

* format codes

* [libc] 整理格式

* refresh projects

* [posix] POSIX standard implementation for PSE51

- add some posix's interfaces that we haven't before.
- these PR have passed the interface definition test across gcc platfrom;
- have tested base on qemu-a9 and stm32h750-art-pi.

* [newlib] only enable POSIX.1-1990

* update projects

* [kernel][mem] Multiple instances of small memory allocation algorithm

* [kernel][mem] Change small memory management algorithm memory header flag

* [kernel][mem] Fix assertion problem

* [kernel][slab] Multiple instances of slab memory management algorithm

* [kernel][memheap] Remove rt_malloc/rt_free/rt_realloc and other related memory interfaces

* [kernel][mem] Clean up memory space of small memory management objects

* [kernel][kservice] Add memory application interface and thread protection interface

* [kernel][kservice] Fix function return value problem

* [kernel][memheap] Optimize memheaptrace print

* [kernel][memheap] Support best mode

* [kernel][memory] Remove semaphore lock

* [kernel][memheap] Add locked flag

* [kernel][memory] Support malloc memory in interrupt

* [kernel][memheap] Add 'memheapcheck' cmd

* [kernel][mem] Fix failure to request full memory

* [kernel][memheap] Fix compilation warning

* [kernel][mem] Fix mem realloc ASSERT

* [examples][testcases] Add small mem testcase

* [examples][mem_tc] Modify test memory size

* [examples][testcases] Add slab memory management algorithm test case

* [examples][testcases] fix small memory management algorithm test case

* [kernel][memory] Adjusting memory allocation algorithm object definition and interface

* [kernel][memory] Fix compilation warning

* [examples][utest] Fix mem test case

* [examples][utest] fix slab test case

* [utest][testcases] Shorten test time

* [kernel][memory] Formatting code

* [examples][utest] Adjust test run time

* [examples][utest] Formatting code

* [bsp] update all rtconfig.h