Line 33... |
Line 33... |
inline unsigned long dmmu_simulate_tlb(unsigned long virtaddr, int write_access)
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inline unsigned long dmmu_simulate_tlb(unsigned long virtaddr, int write_access)
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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_DME) || (!testsprbits(SPR_SR, SPR_SR_DME)))
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if (!(mfspr(SPR_SR) & SPR_SR_DME) || (!testsprbits(SPR_SR, SPR_SR_DME)))
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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.dmmu.pagesize) % config.dmmu.nsets;
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set = (virtaddr / config.dmmu.pagesize) % config.dmmu.nsets;
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tagaddr = (virtaddr / config.dmmu.pagesize) / config.dmmu.nsets;
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tagaddr = (virtaddr / config.dmmu.pagesize) / config.dmmu.nsets;
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vpn = virtaddr / config.dmmu.pagesize;
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vpn = virtaddr / (config.dmmu.pagesize * config.dmmu.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.dmmu.nways; i++)
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for (i = 0; i < config.dmmu.nways; i++)
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if ((getsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_VPN) == vpn) &&
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if (((mfspr(SPR_DTLBMR_BASE(i) + set) / (config.dmmu.pagesize * config.dmmu.nsets)) == vpn) &&
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testsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_V))
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testsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_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 71... |
Line 71... |
for (i = 0; i < config.dmmu.nways; i++)
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for (i = 0; i < config.dmmu.nways; i++)
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if (testsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_LRU))
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if (testsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_LRU))
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setsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_LRU, getsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_LRU) - 1);
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setsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_LRU, getsprbits(SPR_DTLBMR_BASE(i) + set, SPR_DTLBMR_LRU) - 1);
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setsprbits(SPR_DTLBMR_BASE(way) + set, SPR_DTLBMR_LRU, config.dmmu.ustates - 1);
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setsprbits(SPR_DTLBMR_BASE(way) + set, SPR_DTLBMR_LRU, config.dmmu.ustates - 1);
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return getsprbits(SPR_DTLBTR_BASE(way) + set, SPR_DTLBTR_PPN) * config.dmmu.pagesize + (virtaddr % config.dmmu.pagesize);
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ppn = mfspr(SPR_DTLBTR_BASE(way) + set) / config.dmmu.pagesize;
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return (ppn * config.dmmu.pagesize) + (virtaddr % config.dmmu.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.dmmu.ustates - 1;
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int minlru = config.dmmu.ustates - 1;
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int minway = 0;
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int minway = 0;
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