diff options
| author | changzehai <[email protected]> | 2022-04-05 10:26:12 +0800 |
|---|---|---|
| committer | GitHub <[email protected]> | 2022-04-05 10:26:12 +0800 |
| commit | 3f7cc54449e158974f35aaf510dc2934cb38232f (patch) | |
| tree | b80ecf890e536af5313d63669b55f2cc501d0baf /libcpu/arm | |
| parent | 039efbb075120a1718dfe9b171432744d90e9bf2 (diff) | |
1、解决未在rtconfig.h中定义“RT_USING_CPU_FFS”宏时，使用arm-gcc编译会出现__rt_ffs() 函数重定义，导致编译不通过的问题； (#5755)
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。
Diffstat (limited to 'libcpu/arm')
| -rw-r--r-- | libcpu/arm/cortex-r4/cpu.c | 2 | ||||
| -rw-r--r-- | libcpu/arm/cortex-r4/start_gcc.S | 17 |
2 files changed, 19 insertions, 0 deletions
diff --git a/libcpu/arm/cortex-r4/cpu.c b/libcpu/arm/cortex-r4/cpu.c index dd82ef1cf4..b63a07732d 100644 --- a/libcpu/arm/cortex-r4/cpu.c +++ b/libcpu/arm/cortex-r4/cpu.c @@ -87,9 +87,11 @@ void rt_hw_cpu_dcache_disable() } #elif __GNUC__ +#ifdef RT_USING_CPU_FFS int __rt_ffs(int value) { return __builtin_ffs(value); } #endif +#endif /*@}*/ diff --git a/libcpu/arm/cortex-r4/start_gcc.S b/libcpu/arm/cortex-r4/start_gcc.S index de3059e821..10a74b251a 100644 --- a/libcpu/arm/cortex-r4/start_gcc.S +++ b/libcpu/arm/cortex-r4/start_gcc.S @@ -54,6 +54,23 @@ _reset: @------------------------------------------------------------------------------- @ Initialize CPU Registers @ After reset, the CPU is in the Supervisor mode (M = 10011) + mov r0, #0x0000 + mov r1, #0x0000 + mov r2, #0x0000 + mov r3, #0x0000 + mov r4, #0x0000 + mov r5, #0x0000 + mov r6, #0x0000 + mov r7, #0x0000 + mov r8, #0x0000 + mov r9, #0x0000 + mov r10, #0x0000 + mov r11, #0x0000 + mov r12, #0x0000 + mov r13, #0x0000 + mrs r1, cpsr + msr spsr_cxsf, r1 + cpsid if, #19 #if defined (__VFP_FP__) && !defined(__SOFTFP__) && defined(RT_VFP_LAZY_STACKING) |