Commit Graph

5 Commits

Author SHA1 Message Date
blta b1a9c4c4ea
[libcpu/arm]: add dsb and isb instructions in the end of rt_hw_context_switch_to (#5748) 2022-04-08 12:52:22 +08:00
jiladahe1997 433e5f8147 [bugfix] libcpu/arm/cortex-m/context_gcc: 修复thumb指令集汇编语法错误
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.html

Signed-off-by: Mingrui Ren <jiladahe1997@gmail.com>
2021-12-09 11:22:46 +08:00
aozima c3d63e49de set Systick interrupt priority to the lowest 2020-05-30 15:23:25 +08:00
nongxiaoming 607ed93513 [libcpu]context-m33:fix label error in context_gcc.S. 2020-02-11 21:39:35 +08:00
tangyuxin a16f27d84e [libcpu][cm33] support cortex-m33 2019-10-29 09:45:17 +08:00