Subversion Repositories HelenOS

Rev

Rev 2745 | Rev 3766 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 2745 Rev 3635
Line 473... Line 473...
473
            panic("%s: va=%p, rid=%d, iip=%p\n", __func__, va, rid, istate->cr_iip);
473
            panic("%s: va=%p, rid=%d, iip=%p\n", __func__, va, rid, istate->cr_iip);
474
        }
474
        }
475
    }
475
    }
476
}
476
}
477
 
477
 
-
 
478
 
-
 
479
 
-
 
480
static int is_io_page_accessible(int page)
-
 
481
{
-
 
482
    if(TASK->arch.iomap) return bitmap_get(TASK->arch.iomap,page);
-
 
483
    else return 0;
-
 
484
}
-
 
485
 
-
 
486
#define IO_FRAME_BASE 0xFFFFC000000
-
 
487
 
-
 
488
/** There is special handling of memmaped lagacy io, because
-
 
489
 * of 4KB sized access
-
 
490
 * only for userspace
-
 
491
 *
-
 
492
 * @param va virtual address of page fault
-
 
493
 * @param istate Structure with saved interruption state.
-
 
494
 *
-
 
495
 *
-
 
496
 * @return 1 on success, 0 on fail
-
 
497
 */
-
 
498
static int try_memmap_io_insertion(uintptr_t va, istate_t *istate)
-
 
499
{
-
 
500
    if((va >= IO_OFFSET ) && (va < IO_OFFSET + (1<<IO_PAGE_WIDTH)))
-
 
501
        if(TASK){
-
 
502
           
-
 
503
            uint64_t io_page=(va &  ((1<<IO_PAGE_WIDTH)-1)) >> (USPACE_IO_PAGE_WIDTH);
-
 
504
            if(is_io_page_accessible(io_page)){
-
 
505
                //printf("Insert %llX\n",va);
-
 
506
 
-
 
507
                uint64_t page,frame;
-
 
508
 
-
 
509
                page = IO_OFFSET + (1 << USPACE_IO_PAGE_WIDTH) * io_page;
-
 
510
                frame = IO_FRAME_BASE + (1 << USPACE_IO_PAGE_WIDTH) * io_page;
-
 
511
 
-
 
512
 
-
 
513
                tlb_entry_t entry;
-
 
514
   
-
 
515
                entry.word[0] = 0;
-
 
516
                entry.word[1] = 0;
-
 
517
   
-
 
518
                entry.p = true;         /* present */
-
 
519
                entry.ma = MA_UNCACHEABLE;     
-
 
520
                entry.a = true;         /* already accessed */
-
 
521
                entry.d = true;         /* already dirty */
-
 
522
                entry.pl = PL_USER;
-
 
523
                entry.ar = AR_READ | AR_WRITE;
-
 
524
                entry.ppn = frame >> PPN_SHIFT;    //MUSIM spocitat frame
-
 
525
                entry.ps = USPACE_IO_PAGE_WIDTH;
-
 
526
   
-
 
527
                dtc_mapping_insert(page, TASK->as->asid, entry); //Musim zjistit ASID
-
 
528
                return 1;
-
 
529
            }else {
-
 
530
                fault_if_from_uspace(istate,"IO access fault at %p",va);
-
 
531
                return 0;
-
 
532
            }      
-
 
533
        } else
-
 
534
            return 0;
-
 
535
    else
-
 
536
        return 0;
-
 
537
       
-
 
538
    return 0;
-
 
539
 
-
 
540
}
-
 
541
 
-
 
542
 
-
 
543
 
-
 
544
 
478
/** Data TLB fault handler for faults with VHPT turned off.
545
/** Data TLB fault handler for faults with VHPT turned off.
479
 *
546
 *
480
 * @param vector Interruption vector.
547
 * @param vector Interruption vector.
481
 * @param istate Structure with saved interruption state.
548
 * @param istate Structure with saved interruption state.
482
 */
549
 */
Line 509... Line 576...
509
         * Insert it into data translation cache.
576
         * Insert it into data translation cache.
510
         */
577
         */
511
        dtc_pte_copy(t);
578
        dtc_pte_copy(t);
512
        page_table_unlock(AS, true);
579
        page_table_unlock(AS, true);
513
    } else {
580
    } else {
-
 
581
        page_table_unlock(AS, true);
-
 
582
        if (try_memmap_io_insertion(va,istate)) return;
514
        /*
583
        /*
515
         * Forward the page fault to the address space page fault handler.
584
         * Forward the page fault to the address space page fault handler.
516
         */
585
         */
517
        page_table_unlock(AS, true);
-
 
518
        if (as_page_fault(va, PF_ACCESS_READ, istate) == AS_PF_FAULT) {
586
        if (as_page_fault(va, PF_ACCESS_READ, istate) == AS_PF_FAULT) {
519
            fault_if_from_uspace(istate,"Page fault at %p",va);
587
            fault_if_from_uspace(istate,"Page fault at %p",va);
520
            panic("%s: va=%p, rid=%d, iip=%p\n", __func__, va, rid, istate->cr_iip);
588
            panic("%s: va=%p, rid=%d, iip=%p\n", __func__, va, rid, istate->cr_iip);
521
        }
589
        }
522
    }
590
    }