| Line 49... |
Line 49... |
/* Number of usage states (2, 3, 4 etc., max is 4). */
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/* Number of usage states (2, 3, 4 etc., max is 4). */
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#define ITLB_USTATES 2
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#define ITLB_USTATES 2
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void itlb_info()
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void itlb_info()
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{
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{
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if (!getsprbits(SPR_UPR, SPR_UPR_IMP)) {
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printf("IMMU not implemented. Set UPR[IMP].\n");
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return;
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}
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|
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printf("Insn MMU %dKB: ", ITLB_SETS * ITLB_ENTRY_SIZE * ITLB_WAYS / 1024);
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printf("Insn MMU %dKB: ", ITLB_SETS * ITLB_ENTRY_SIZE * ITLB_WAYS / 1024);
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printf("%d ways, %d sets, entry size %d bytes\n", ITLB_WAYS, ITLB_SETS, ITLB_ENTRY_SIZE);
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printf("%d ways, %d sets, entry size %d bytes\n", ITLB_WAYS, ITLB_SETS, ITLB_ENTRY_SIZE);
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}
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}
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/* First check if virtual address is covered by ITLB and if it is:
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/* First check if virtual address is covered by ITLB and if it is:
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| Line 66... |
Line 71... |
- find lru way and entry and invoke ITLB miss exception handler
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- find lru way and entry and invoke ITLB miss exception handler
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- set 'lru' with ITLB_USTATES - 1 and decrement 'lru' of other
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- set 'lru' with ITLB_USTATES - 1 and decrement 'lru' of other
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ways unless they have reached 0
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ways unless they have reached 0
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*/
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*/
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unsigned long itlb_status(int start_set)
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void itlb_status(int start_set)
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{
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{
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int set;
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int set;
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int way;
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int way;
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int end_set = ITLB_SETS;
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int end_set = ITLB_SETS;
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|
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if (!getsprbits(SPR_UPR, SPR_UPR_IMP)) {
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printf("IMMU not implemented. Set UPR[IMP].\n");
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return;
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}
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|
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if ((start_set >= 0) && (start_set < end_set))
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if ((start_set >= 0) && (start_set < end_set))
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end_set = start_set + 1;
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end_set = start_set + 1;
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else
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else
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start_set = 0;
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start_set = 0;
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| Line 107... |
Line 117... |
int set, way = -1;
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int set, way = -1;
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int i;
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int i;
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unsigned long tagaddr;
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unsigned long tagaddr;
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unsigned long vpn;
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unsigned long vpn;
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|
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if (! (mfspr(SPR_SR) & SPR_SR_IME))
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if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(getsprbits(SPR_UPR, SPR_UPR_IMP)))
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return virtaddr;
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return virtaddr;
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|
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/* Which set to check out? */
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/* Which set to check out? */
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set = (virtaddr / PAGE_SIZE) % ITLB_SETS;
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set = (virtaddr / PAGE_SIZE) % ITLB_SETS;
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tagaddr = (virtaddr / PAGE_SIZE) / ITLB_SETS;
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tagaddr = (virtaddr / PAGE_SIZE) / ITLB_SETS;
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