| Line 33... |
Line 33... |
inline unsigned long immu_simulate_tlb(unsigned long virtaddr)
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inline unsigned long immu_simulate_tlb(unsigned long virtaddr)
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{
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{
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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, ppn;
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if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(testsprbits(SPR_UPR, SPR_UPR_IMP)))
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if (!(mfspr(SPR_SR) & SPR_SR_IME) || !(testsprbits(SPR_UPR, SPR_UPR_IMP)))
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return virtaddr;
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return virtaddr;
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/* Which set to check out? */
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/* Which set to check out? */
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set = (virtaddr / config.immu.pagesize) % config.immu.nsets;
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set = (virtaddr / config.immu.pagesize) % config.immu.nsets;
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tagaddr = (virtaddr / config.immu.pagesize) / config.immu.nsets;
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tagaddr = (virtaddr / config.immu.pagesize) / config.immu.nsets;
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vpn = virtaddr / config.immu.pagesize;
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vpn = virtaddr / (config.immu.pagesize * config.immu.nsets);
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/* Scan all ways and try to find a matching way. */
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/* Scan all ways and try to find a matching way. */
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for (i = 0; i < config.immu.nways; i++)
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for (i = 0; i < config.immu.nways; i++)
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if ((getsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_VPN) == vpn) &&
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if (((mfspr(SPR_ITLBMR_BASE(i) + set) / (config.immu.pagesize * config.immu.nsets)) == vpn) &&
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testsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_V))
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testsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_V))
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way = i;
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way = i;
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/* Did we find our tlb entry? */
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/* Did we find our tlb entry? */
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if (way >= 0) { /* Yes, we did. */
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if (way >= 0) { /* Yes, we did. */
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| Line 69... |
Line 69... |
for (i = 0; i < config.immu.nways; i++)
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for (i = 0; i < config.immu.nways; i++)
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if (testsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_LRU))
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if (testsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_LRU))
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setsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_LRU, getsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_LRU) - 1);
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setsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_LRU, getsprbits(SPR_ITLBMR_BASE(i) + set, SPR_ITLBMR_LRU) - 1);
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setsprbits(SPR_ITLBMR_BASE(way) + set, SPR_ITLBMR_LRU, config.immu.ustates - 1);
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setsprbits(SPR_ITLBMR_BASE(way) + set, SPR_ITLBMR_LRU, config.immu.ustates - 1);
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return getsprbits(SPR_ITLBTR_BASE(way) + set, SPR_ITLBTR_PPN) * config.immu.pagesize + (virtaddr % config.immu.pagesize);
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ppn = mfspr(SPR_ITLBTR_BASE(way) + set) / config.immu.pagesize;
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return (ppn * config.immu.pagesize) + (virtaddr % config.immu.pagesize);
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}
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}
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else { /* No, we didn't. */
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else { /* No, we didn't. */
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int minlru = config.immu.ustates - 1;
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int minlru = config.immu.ustates - 1;
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int minway = 0;
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int minway = 0;
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