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Annotation of qemu/target-s390x/op_helper.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  S/390 helper routines
        !             3:  *
        !             4:  *  Copyright (c) 2009 Alexander Graf
        !             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 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, write to the Free Software
        !            18:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
        !            19:  */
        !            20: 
        !            21: #include "exec.h"
        !            22: 
        !            23: /*****************************************************************************/
        !            24: /* Softmmu support */
        !            25: #if !defined (CONFIG_USER_ONLY)
        !            26: 
        !            27: #define MMUSUFFIX _mmu
        !            28: 
        !            29: #define SHIFT 0
        !            30: #include "softmmu_template.h"
        !            31: 
        !            32: #define SHIFT 1
        !            33: #include "softmmu_template.h"
        !            34: 
        !            35: #define SHIFT 2
        !            36: #include "softmmu_template.h"
        !            37: 
        !            38: #define SHIFT 3
        !            39: #include "softmmu_template.h"
        !            40: 
        !            41: /* try to fill the TLB and return an exception if error. If retaddr is
        !            42:    NULL, it means that the function was called in C code (i.e. not
        !            43:    from generated code or from helper.c) */
        !            44: /* XXX: fix it to restore all registers */
        !            45: void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
        !            46: {
        !            47:     TranslationBlock *tb;
        !            48:     CPUState *saved_env;
        !            49:     unsigned long pc;
        !            50:     int ret;
        !            51: 
        !            52:     /* XXX: hack to restore env in all cases, even if not called from
        !            53:        generated code */
        !            54:     saved_env = env;
        !            55:     env = cpu_single_env;
        !            56:     ret = cpu_s390x_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
        !            57:     if (unlikely(ret != 0)) {
        !            58:         if (likely(retaddr)) {
        !            59:             /* now we have a real cpu fault */
        !            60:             pc = (unsigned long)retaddr;
        !            61:             tb = tb_find_pc(pc);
        !            62:             if (likely(tb)) {
        !            63:                 /* the PC is inside the translated code. It means that we have
        !            64:                    a virtual CPU fault */
        !            65:                 cpu_restore_state(tb, env, pc, NULL);
        !            66:             }
        !            67:         }
        !            68:         /* XXX */
        !            69:         /* helper_raise_exception_err(env->exception_index, env->error_code); */
        !            70:     }
        !            71:     env = saved_env;
        !            72: }
        !            73: 
        !            74: #endif

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