target-sparc: implement auto-demapping for UA2005 CPUs
Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
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@ -210,6 +210,28 @@ static void replace_tlb_1bit_lru(SparcTLBEntry *tlb,
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{
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unsigned int i, replace_used;
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if (cpu_has_hypervisor(env1)) {
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uint64_t new_vaddr = tlb_tag & ~0x1fffULL;
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uint64_t new_size = 8192ULL << 3 * TTE_PGSIZE(tlb_tte);
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uint32_t new_ctx = tlb_tag & 0x1fffU;
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for (i = 0; i < 64; i++) {
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uint32_t ctx = tlb[i].tag & 0x1fffU;
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/* check if new mapping overlaps an existing one */
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if (new_ctx == ctx) {
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uint64_t vaddr = tlb[i].tag & ~0x1fffULL;
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uint64_t size = 8192ULL << 3 * TTE_PGSIZE(tlb[i].tte);
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if (new_vaddr == vaddr
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|| (new_vaddr < vaddr + size
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&& vaddr < new_vaddr + new_size)) {
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DPRINTF_MMU("auto demap entry [%d] %lx->%lx\n", i, vaddr,
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new_vaddr);
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replace_tlb_entry(&tlb[i], tlb_tag, tlb_tte, env1);
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return;
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}
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}
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}
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}
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/* Try replacing invalid entry */
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for (i = 0; i < 64; i++) {
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if (!TTE_IS_VALID(tlb[i].tte)) {
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