Running part of code from RAM

I'm working with some project right now, I need some example about how to run part of code from RAM. I found the code in IAR version, I wonder if someone can help me to translate it into KeilC version.

void runFunctionFromRam(void (*func) (void), unsigned char *ramPtn, unsigned char length)
{ unsigned char code *codePtn; unsigned char i;
// void *f (void * ptr);

// Save start address for function in RAM void *f (void) = (void*)(int)ramPtn;

// get pointer to function in code codePtn = (unsigned char code *)(int)func;

// Copy function from code to RAM for(i = 0; i < length; i++) { ramPtn[i] = codePtn[i]; } EA = 0;

// Enable unified code model MEMCTR |= 0x40;

// Run function from RAM

// Disable unified code model MEMCTR &= ~0x40; EA = 1;
}

I'm having problem with these line : void *f (void) = (void*)(int)ramPtn;
and (*f)(void);

The compiler won't let me pass with these line.