Archipelago » qemu

/*

 *  PowerPC MMU stub handling for user mode emulation

 *

 *  Copyright (c) 2003-2007 Jocelyn Mayer

 *  Copyright (c) 2013 David Gibson, IBM Corporation.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */

#include "cpu.h"

int cpu_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,

                         int mmu_idx)

{

    int exception, error_code;

    if (rw == 2) {

        exception = POWERPC_EXCP_ISI;

        error_code = 0x40000000;

    } else {

        exception = POWERPC_EXCP_DSI;

        error_code = 0x40000000;

        if (rw) {

            error_code |= 0x02000000;

        }

        env->spr[SPR_DAR] = address;

        env->spr[SPR_DSISR] = error_code;

    }

    env->exception_index = exception;

    env->error_code = error_code;

    return 1;

}