static hwaddr ppc_hash64_htab_lookup(CPUPPCState *env, ppc_slb_t *slb, target_ulong eaddr, ppc_hash_pte64_t *pte) { hwaddr pteg_off, pte_offset; hwaddr hash; uint64_t vsid, epnshift, epnmask, epn, ptem; /* Page size according to the SLB, which we use to generate the * EPN for hash table lookup.. When we implement more recent MMU * extensions this might be different from the actual page size * encoded in the PTE */ epnshift = (slb->vsid & SLB_VSID_L) ? TARGET_PAGE_BITS_16M : TARGET_PAGE_BITS; epnmask = ~((1ULL << epnshift) - 1); if (slb->vsid & SLB_VSID_B) { /* 1TB segment */ vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT_1T; epn = (eaddr & ~SEGMENT_MASK_1T) & epnmask; hash = vsid ^ (vsid << 25) ^ (epn >> epnshift); } else { /* 256M segment */ vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT; epn = (eaddr & ~SEGMENT_MASK_256M) & epnmask; hash = vsid ^ (epn >> epnshift); } ptem = (slb->vsid & SLB_VSID_PTEM) | ((epn >> 16) & HPTE64_V_AVPN); /* Page address translation */ LOG_MMU("htab_base " TARGET_FMT_plx " htab_mask " TARGET_FMT_plx " hash " TARGET_FMT_plx "\n", env->htab_base, env->htab_mask, hash); /* Primary PTEG lookup */ LOG_MMU("0 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx " vsid=" TARGET_FMT_lx " ptem=" TARGET_FMT_lx " hash=" TARGET_FMT_plx "\n", env->htab_base, env->htab_mask, vsid, ptem, hash); pteg_off = (hash * HASH_PTEG_SIZE_64) & env->htab_mask; pte_offset = ppc_hash64_pteg_search(env, pteg_off, 0, ptem, pte); if (pte_offset == -1) { /* Secondary PTEG lookup */ LOG_MMU("1 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx " vsid=" TARGET_FMT_lx " api=" TARGET_FMT_lx " hash=" TARGET_FMT_plx "\n", env->htab_base, env->htab_mask, vsid, ptem, ~hash); pteg_off = (~hash * HASH_PTEG_SIZE_64) & env->htab_mask; pte_offset = ppc_hash64_pteg_search(env, pteg_off, 1, ptem, pte); } return pte_offset; }