target-s390x/helper.c

   1 /*
   2  *  S/390 helpers
   3  *
   4  *  Copyright (c) 2009 Ulrich Hecht
   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 <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "cpu.h"
  26 #include "exec-all.h"
  27 #include "gdbstub.h"
  28 #include "qemu-common.h"
  29
  30 #include <linux/kvm.h>
  31 #include "kvm.h"
  32
  33 CPUS390XState *cpu_s390x_init(const char *cpu_model)
  34 {
  35     CPUS390XState *env;
  36     static int inited = 0;
  37
  38     env = qemu_mallocz(sizeof(CPUS390XState));
  39     cpu_exec_init(env);
  40     if (!inited) {
  41         inited = 1;
  42     }
  43
  44     env->cpu_model_str = cpu_model;
  45     cpu_reset(env);
  46     qemu_init_vcpu(env);
  47     return env;
  48 }
  49
  50 target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
  51 {
  52     return addr;
  53 }
  54
  55 void cpu_reset(CPUS390XState *env)
  56 {
  57     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
  58         qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
  59         log_cpu_state(env, 0);
  60     }
  61
  62     memset(env, 0, offsetof(CPUS390XState, breakpoints));
  63     /* FIXME: reset vector? */
  64     tlb_flush(env, 1);
  65 }
  66
  67 #ifndef CONFIG_USER_ONLY
  68
  69 int cpu_s390x_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
  70                                 int mmu_idx, int is_softmmu)
  71 {
  72     target_ulong phys;
  73     int prot;
  74
  75     /* XXX: implement mmu */
  76
  77     phys = address;
  78     prot = PAGE_READ | PAGE_WRITE;
  79
  80     return tlb_set_page(env, address & TARGET_PAGE_MASK,
  81                         phys & TARGET_PAGE_MASK, prot,
  82                         mmu_idx, is_softmmu);
  83 }
  84 #endif /* CONFIG_USER_ONLY */