diff options
Diffstat (limited to 'libcpu')
| -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) |