mmu_emu_handle_fault
if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0))
if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1))
if (!mmu_emu_handle_fault(addr, 1, 0))
int mmu_emu_handle_fault(unsigned long vaddr, int read_flag, int kernel_fault);