target/ppc/mmu-book3s-v3.c

   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 }