libs/rt-thread-official
libs/rt-thread-official
4
0
Fork 0
mirror of https://github.com/RT-Thread/rt-thread.git synced 2025-02-18 18:39:11 +08:00
Code Issues Releases Wiki Activity

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)

Browse Source 
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。
This commit is contained in:
changzehai 2022-04-05 10:26:12 +08:00 committed by GitHub
parent 039efbb075
commit 3f7cc54449
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libcpu/arm/cortex-r4/cpu.c
View File

@ -87,9 +87,11 @@ void rt_hw_cpu_dcache_disable()
} }
#elif __GNUC__ #elif __GNUC__
#ifdef RT_USING_CPU_FFS
int __rt_ffs(int value) int __rt_ffs(int value)
{ {
return __builtin_ffs(value); return __builtin_ffs(value);
} }
#endif #endif
#endif
/*@}*/ /*@}*/

17
libcpu/arm/cortex-r4/start_gcc.S
View File

@ -54,6 +54,23 @@ _reset:
@------------------------------------------------------------------------------- @-------------------------------------------------------------------------------
@ Initialize CPU Registers @ Initialize CPU Registers
@ After reset, the CPU is in the Supervisor mode (M = 10011) @ 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 cpsid if, #19
#if defined (__VFP_FP__) && !defined(__SOFTFP__) && defined(RT_VFP_LAZY_STACKING) #if defined (__VFP_FP__) && !defined(__SOFTFP__) && defined(RT_VFP_LAZY_STACKING)