[update] Removed C++ global constructor initialization, this method is not used in GCC4.7 and later versions.

* [gcc][armcc][armclang] rtconfig.CROSS_TOOL->rtconfig.PLATFORM

feat: move MRS demo source to bsp and libraries folder

feat: update Sconscript

feat: modify SConstruct in the bsp

feat: use the rtconfig.py of gd32vf103v-eval bsp to modify

feat: use the MRS's rtconfig.h temoporarily

feat: update Kconfig files

feat: use the MRS's .ld and rename as link.lds

feat: add ch32v1 porting folder

perf: remove board/system_ch32v10x.c

fix: define SOC_ARM_SERIES_CH32V103 in rtconfig.h

fix: add some neccessary macros in rtconfig.h

perf: use the menuconfig to generate rtconfig.h

feat: add readme.md

fix: correct the bad encode in main.c

fix: include board.h in main.c

perf: check and update README.md

perf: remove ch32f10x_port_cn.md

feat: ignore the standard libraries's CI checking

feat: add sdk_dist.py

fix: correct some style errors again

perf: simply the board/kconfig

fix: format ch32v103r-evt

fix: format drvs and libcpu

2、解决bsp/rm48x50工程使用arm-gcc编译下载后，程序运行出现prefetch abort异常的问题。

* [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

* 1. 新增了i2c/spi/rtc/crypto等驱动；2. 删除了部分文件中的未使用到的头文件包含; 3. 修改keil编译时pm文件atoi的头文件stdlib未包含的警告

* 修改文件格式

* BSP

1. 修改f4系列bsp的readme文件与工程文件
2. 修改f0系列源文件的版权信息、删除目前没有的库文件。
3. 其他

* 修改IAR环境下arm cortex-m33内核的syscall_iar.S文件编译错误

* 还原.gitignore文件
Co-authored-by: Naisino2200 <90822414+aisino2200@users.noreply.github.com>

* [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

更正了看门狗的寄存器地址

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

原始提交PR：https://gitee.com/rtthread/rt-thread/pulls/372
提交者：https://gitee.com/wei-handong

----------------------

在TI公司C6000 DSP处理器上成功移植rt-thread操作系统；主要在libcpu/ti-dsp/c6x添加keystone架构底层代码，在bsp/ti-c6678添加bsp工程，该工程已在本人的开发板上成功运行

* 添加TMS320C6678处理器，keystone架构底层代码

* 添加支持中断栈部分代码，修改格式

* 修改汇编rt_hw_context_switch_to处关于时间槽的使用；修改格式

* 修改使用C语言构建任务栈帧，清除fls和ffs对<c6x.h>文件的依赖

* 修改bsp tms320c6678工程，并测试

* 删除依赖TI的KeyStone_common.c文件

* 添加编译说明

* update bsp/ti-tms320c6678/README.md.

* format code
Co-authored-by: NHuang bo <hb265419@126.com>
Co-authored-by: hdwei <1147479335@qq.com>
Co-authored-by: Nbernard <bernard.xiong@gmail.com>
Co-authored-by: Nrtthread-bot <48120998+rtthread-bot@users.noreply.github.com>
Co-authored-by: Meco Man <920369182@qq.com>

* [cpu] 增加ARCH_CPU_BIG_ENDIAN
- 之前RT_USING_BIG_ENDIAN的命名并不合理，予以替换为ARCH_CPU_BIG_ENDIAN
- 删除一处多余的ARCH_CPU_64BIT
- 整理了libcpu/Kconfig的格式

* [libcpu][Kconfig] Cortex-M4&7 select ARCH_ARM_CORTEX_FPU

* revert last commit

This reverts commit a5f6fdc7.

当使用thumb指令集时，要求汇编语法中的“条件执行”要跟在IT指令后面，否则会编译不通过。
报错如下：Error: thumb conditional instruction should be in IT block -- `moveq r4,#0x01'

虽然可以通过指定"-Wa,-mimplicit-it=thumb"选项来告诉编译器识别隐式的IT指令，但是能在代码里面直接加上IT指令的话更好。

thumb指令集“条件执行”arm官网文档：
    https://developer.arm.com/documentation/dui0473/m/condition-codes/conditional-execution-in-thumb-state

参考论坛帖子：
    https://club.rt-thread.org/ask/question/433887.html
    https://club.rt-thread.org/ask/question/4188.htmlSigned-off-by: NMingrui Ren <jiladahe1997@gmail.com>