1 /* 2 * PowerPC ISAV3 BookS emulation generic mmu helpers for qemu. 3 * 4 * Copyright (c) 2017 Suraj Jitindar Singh, IBM Corporation 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "cpu.h" 22 #include "mmu-hash64.h" 23 #include "mmu-book3s-v3.h" 24 #include "mmu-radix64.h" 25 26 bool ppc64_v3_get_pate(PowerPCCPU *cpu, target_ulong lpid, ppc_v3_pate_t *entry) 27 { 28 uint64_t patb = cpu->env.spr[SPR_PTCR] & PTCR_PATB; 29 uint64_t pats = cpu->env.spr[SPR_PTCR] & PTCR_PATS; 30 31 /* Check if partition table is properly aligned */ 32 if (patb & MAKE_64BIT_MASK(0, pats + 12)) { 33 return false; 34 } 35 36 /* Calculate number of entries */ 37 pats = 1ull << (pats + 12 - 4); 38 if (pats <= lpid) { 39 return false; 40 } 41 42 /* Grab entry */ 43 patb += 16 * lpid; 44 entry->dw0 = ldq_phys(CPU(cpu)->as, patb); 45 entry->dw1 = ldq_phys(CPU(cpu)->as, patb + 8); 46 return true; 47 } 48