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Line 53... Line 53...
53 
 * Initialize TLB.
 53 
 * Initialize TLB.
54 
 * Invalidate all entries and mark wired entries.
 54 
 * Invalidate all entries and mark wired entries.
55 
 */
 55 
 */
56 
void tlb_arch_init(void)
 56 
void tlb_arch_init(void)
57 
{
 57 
{
58 
    int i;
 - 
 
59 
 
 - 
 
60 
    cp0_pagemask_write(TLB_PAGE_MASK_16K);
 58 
    cp0_pagemask_write(TLB_PAGE_MASK_16K);
61 
    cp0_entry_hi_write(0);
 - 
 
62 
    cp0_entry_lo0_write(0);
 - 
 
63 
    cp0_entry_lo1_write(0);
 - 
 
64 
 
 59 
 
65 
    /*
 - 
 
66 
     * Invalidate all entries.
 60 
    tlb_invalidate_all();
67 
     */
 - 
 
68 
    for (i = 0; i < TLB_ENTRY_COUNT; i++) {
 - 
 
69 
        cp0_index_write(i);
 - 
 
70 
        tlbwi();
 - 
 
71 
    }
 61 
       
72 
   
 - 
 
73 
    /*
 62 
    /*
74 
     * The kernel is going to make use of some wired
 63 
     * The kernel is going to make use of some wired
75 
     * entries (e.g. mapping kernel stacks in kseg3).
 64 
     * entries (e.g. mapping kernel stacks in kseg3).
76 
     */
 65 
     */
77 
    cp0_wired_write(TLB_WIRED);
 66 
    cp0_wired_write(TLB_WIRED);
Line 407... Line 396...
407 
    int i;
 396 
    int i;
408 
 
 397 
 
409 
    printf("TLB:\n");
 398 
    printf("TLB:\n");
410 
    for (i = 0; i < TLB_ENTRY_COUNT; i++) {
 399 
    for (i = 0; i < TLB_ENTRY_COUNT; i++) {
411 
        cp0_index_write(i);
 400 
        cp0_index_write(i);
412 
 
 - 
 
413 
        tlbr();
 401 
        tlbr();
414 
       
 402 
       
415 
        hi.value = cp0_entry_hi_read();
 403 
        hi.value = cp0_entry_hi_read();
416 
        lo0.value = cp0_entry_lo0_read();
 404 
        lo0.value = cp0_entry_lo0_read();
417 
        lo1.value = cp0_entry_lo1_read();
 405 
        lo1.value = cp0_entry_lo1_read();
Line 420... Line 408...
420 
               "\t\t\tg[1]=%d, v[1]=%d, d[1]=%d, c[1]=%B, pfn[1]=%d\n",
 408 
               "\t\t\tg[1]=%d, v[1]=%d, d[1]=%d, c[1]=%B, pfn[1]=%d\n",
421 
               i, hi.asid, hi.vpn2, lo0.g, lo0.v, lo0.d, lo0.c, lo0.pfn,
 409 
               i, hi.asid, hi.vpn2, lo0.g, lo0.v, lo0.d, lo0.c, lo0.pfn,
422 
               lo1.g, lo1.v, lo1.d, lo1.c, lo1.pfn);
 410 
               lo1.g, lo1.v, lo1.d, lo1.c, lo1.pfn);
423 
    }
 411 
    }
424 
}
 412 
}
- 
 
 413 
 
- 
 
 414 
/** Invalidate all TLB entries. */
- 
 
 415 
void tlb_invalidate_all(void)
- 
 
 416 
{
- 
 
 417 
    int i;
- 
 
 418 
 
- 
 
 419 
    cp0_entry_hi_write(0);
- 
 
 420 
    cp0_entry_lo0_write(0);
- 
 
 421 
    cp0_entry_lo1_write(0);
- 
 
 422 
 
- 
 
 423 
    for (i = 0; i < TLB_ENTRY_COUNT; i++) {
- 
 
 424 
        cp0_index_write(i);
- 
 
 425 
        tlbwi();
- 
 
 426 
    }
- 
 
 427 
}
- 
 
 428 
 
- 
 
 429 
/** Invalidate all TLB entries belonging to specified address space.
- 
 
 430 
 *
- 
 
 431 
 * @param asid Address space identifier.
- 
 
 432 
 */
- 
 
 433 
void tlb_invalidate_asid(asid_t asid)
- 
 
 434 
{
- 
 
 435 
    entry_hi_t hi;
- 
 
 436 
    int i;
- 
 
 437 
 
- 
 
 438 
    for (i = 0; i < TLB_ENTRY_COUNT; i++) {
- 
 
 439 
        cp0_index_write(i);
- 
 
 440 
        tlbr();
- 
 
 441 
       
- 
 
 442 
        if (hi.asid == asid) {
- 
 
 443 
            cp0_entry_lo0_write(0);
- 
 
 444 
            cp0_entry_lo1_write(0);
- 
 
 445 
            tlbwi();
- 
 
 446 
        }
- 
 
 447 
    }
- 
 
 448 
 
- 
 
 449 
}
- 
 
 450 
 
- 
 
 451 
/** Invalidate TLB entry for specified page belonging to specified address space.
- 
 
 452 
 *
- 
 
 453 
 * @param asid Address space identifier.
- 
 
 454 
 * @param page Page whose TLB entry is to be invalidated.
- 
 
 455 
 */
- 
 
 456 
void tlb_invalidate_page(asid_t asid, __address page)
- 
 
 457 
{
- 
 
 458 
    entry_hi_t hi;
- 
 
 459 
    tlb_index_t index;
- 
 
 460 
    int i;
- 
 
 461 
 
- 
 
 462 
    hi.value = 0;
- 
 
 463 
    prepare_entry_hi(&hi, asid, page);
- 
 
 464 
   
- 
 
 465 
    tlbp();
- 
 
 466 
    index.value = cp0_index_read();
- 
 
 467 
 
- 
 
 468 
    if (!index.p) {
- 
 
 469 
        /* Entry was found, index register contains valid index. */
- 
 
 470 
        cp0_entry_lo0_write(0);
- 
 
 471 
        cp0_entry_lo1_write(0);
- 
 
 472 
        tlbwi();
- 
 
 473 
    }
- 
 
 474 
}