Help Putting ARM Instruction Inline GCC


int  main(void)
{
     __asm__ __volatile__ ( "MCR p15, 0, Rd, c7, c0, 4" );

}


Hi,

Replace 'Rd' with the actual destination register - R0, R1, etc.

HTH.

For the instruction in question, it doesn't really matter which register you use; though you can let the compiler automatically select an arbitrary register containing the value zero, by using:

void wfi(void)
{
  __asm__ __volatile__ ("MCR p15,0,%0,c7,c0,4" ::"r"(0));
}
hth
s.