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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "cpu.h"
  25 #include "exec-all.h"
  26 #include "gdbstub.h"
  27 #include "qemu-common.h"
  28
  29 #include <linux/kvm.h>
  30 #include "kvm.h"
  31
  32 CPUS390XState *cpu_s390x_init(const char *cpu_model)
  33 {
  34     CPUS390XState *env;
  35     static int inited = 0;
  36
  37     env = qemu_mallocz(sizeof(CPUS390XState));
  38     cpu_exec_init(env);
  39     if (!inited) {
  40         inited = 1;
  41     }
  42
  43     env->cpu_model_str = cpu_model;
  44     cpu_reset(env);
  45     qemu_init_vcpu(env);
  46     return env;
  47 }
  48
  49 void cpu_reset(CPUS390XState *env)
  50 {
  51     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
  52         qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
  53         log_cpu_state(env, 0);
  54     }
  55
  56     memset(env, 0, offsetof(CPUS390XState, breakpoints));
  57     /* FIXME: reset vector? */
  58     tlb_flush(env, 1);
  59 }
  60
  61 target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
  62 {
  63     return 0;
  64 }
  65
  66 #ifndef CONFIG_USER_ONLY
  67
  68 int cpu_s390x_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
  69                                 int mmu_idx, int is_softmmu)
  70 {
  71     target_ulong phys;
  72     int prot;
  73
  74     /* XXX: implement mmu */
  75
  76     phys = address;
  77     prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
  78
  79     tlb_set_page(env, address & TARGET_PAGE_MASK,
  80                  phys & TARGET_PAGE_MASK, prot,
  81                  mmu_idx, TARGET_PAGE_SIZE);
  82     return 0;
  83 }
  84 #endif /* CONFIG_USER_ONLY */