LXR qemu/target/ppc/user_only

   1/*
   2 *  PowerPC MMU stub handling for user mode emulation
   3 *
   4 *  Copyright (c) 2003-2007 Jocelyn Mayer
   5 *  Copyright (c) 2013 David Gibson, IBM Corporation.
   6 *
   7 * This library is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU Lesser General Public
   9 * License as published by the Free Software Foundation; either
  10 * version 2 of the License, or (at your option) any later version.
  11 *
  12 * This library is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 * Lesser General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU Lesser General Public
  18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "cpu.h"
  23#include "exec/exec-all.h"
  24
  25
  26bool ppc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
  27                      MMUAccessType access_type, int mmu_idx,
  28                      bool probe, uintptr_t retaddr)
  29{
  30    PowerPCCPU *cpu = POWERPC_CPU(cs);
  31    CPUPPCState *env = &cpu->env;
  32    int exception, error_code;
  33
  34    if (access_type == MMU_INST_FETCH) {
  35        exception = POWERPC_EXCP_ISI;
  36        error_code = 0x40000000;
  37    } else {
  38        exception = POWERPC_EXCP_DSI;
  39        error_code = 0x40000000;
  40        if (access_type == MMU_DATA_STORE) {
  41            error_code |= 0x02000000;
  42        }
  43        env->spr[SPR_DAR] = address;
  44        env->spr[SPR_DSISR] = error_code;
  45    }
  46    cs->exception_index = exception;
  47    env->error_code = error_code;
  48    cpu_loop_exit_restore(cs, retaddr);
  49}
  50