PDC_BLOCK_TLB
retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INSERT, (unsigned long) (vpage >> 32),
retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_PURGE_ALL);