| Line 26... |
Line 26... |
static Word tlbEntryHi;
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static Word tlbEntryHi;
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static Word tlbEntryLo;
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static Word tlbEntryLo;
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static Word mmuBadAddr;
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static Word mmuBadAddr;
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static Word mmuBadAccs;
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static Word mmuBadAccs;
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static int randomIndex;
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static void updateRandomIndex(void) {
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if (randomIndex == TLB_FIXED) {
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randomIndex = TLB_MASK;
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} else {
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randomIndex--;
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}
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}
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static int assoc(Word page) {
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static int assoc(Word page) {
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int n, i;
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int n, i;
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n = -1;
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n = -1;
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| Line 62... |
Line 73... |
addresses but not experienced with unmapped addresses */
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addresses but not experienced with unmapped addresses */
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assoc(0);
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assoc(0);
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pAddr = vAddr & ~0xC0000000;
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pAddr = vAddr & ~0xC0000000;
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} else {
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} else {
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/* mapped address space */
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/* mapped address space */
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updateRandomIndex();
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page = vAddr & PAGE_MASK;
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page = vAddr & PAGE_MASK;
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offset = vAddr & OFFSET_MASK;
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offset = vAddr & OFFSET_MASK;
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index = assoc(page);
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index = assoc(page);
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if (index == -1) {
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if (index == -1) {
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/* TLB miss exception */
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/* TLB miss exception */
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| Line 215... |
Line 227... |
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void mmuTbwr(void) {
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void mmuTbwr(void) {
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int index;
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int index;
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/* choose a random index, but don't touch fixed entries */
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/* choose a random index, but don't touch fixed entries */
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do {
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index = randomIndex;
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index = rand() & TLB_MASK;
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} while (index < TLB_FIXED);
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tlb[index].page = tlbEntryHi & PAGE_MASK;
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tlb[index].page = tlbEntryHi & PAGE_MASK;
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tlb[index].frame = tlbEntryLo & PAGE_MASK;
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tlb[index].frame = tlbEntryLo & PAGE_MASK;
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tlb[index].write = tlbEntryLo & TLB_WRITE ? true : false;
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tlb[index].write = tlbEntryLo & TLB_WRITE ? true : false;
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tlb[index].valid = tlbEntryLo & TLB_VALID ? true : false;
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tlb[index].valid = tlbEntryLo & TLB_VALID ? true : false;
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if (debugWrite) {
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if (debugWrite) {
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| Line 301... |
Line 311... |
tlbIndex = rand() & TLB_MASK;
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tlbIndex = rand() & TLB_MASK;
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tlbEntryHi = rand() & PAGE_MASK;
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tlbEntryHi = rand() & PAGE_MASK;
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tlbEntryLo = rand() & (PAGE_MASK | TLB_WRITE | TLB_VALID);
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tlbEntryLo = rand() & (PAGE_MASK | TLB_WRITE | TLB_VALID);
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mmuBadAddr = rand();
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mmuBadAddr = rand();
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mmuBadAccs = rand() & MMU_ACCS_MASK;
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mmuBadAccs = rand() & MMU_ACCS_MASK;
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randomIndex = TLB_MASK;
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}
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}
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void mmuInit(void) {
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void mmuInit(void) {
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mmuReset();
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mmuReset();
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