target-s390x/cpu.c

   1 /*
   2  * QEMU S/390 CPU
   3  *
   4  * Copyright (c) 2009 Ulrich Hecht
   5  * Copyright (c) 2011 Alexander Graf
   6  * Copyright (c) 2012 SUSE LINUX Products GmbH
   7  * Copyright (c) 2012 IBM Corp.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see
  21  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  22  * Contributions after 2012-12-11 are licensed under the terms of the
  23  * GNU GPL, version 2 or (at your option) any later version.
  24  */
  25
  26 #include "cpu.h"
  27 #include "qemu-common.h"
  28 #include "qemu/timer.h"
  29 #include "hw/hw.h"
  30 #ifndef CONFIG_USER_ONLY
  31 #include "sysemu/arch_init.h"
  32 #endif
  33
  34 #define CR0_RESET       0xE0UL
  35 #define CR14_RESET      0xC2000000UL;
  36
  37 /* generate CPU information for cpu -? */
  38 void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf)
  39 {
  40 #ifdef CONFIG_KVM
  41     (*cpu_fprintf)(f, "s390 %16s\n", "host");
  42 #endif
  43 }
  44
  45 #ifndef CONFIG_USER_ONLY
  46 CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
  47 {
  48     CpuDefinitionInfoList *entry;
  49     CpuDefinitionInfo *info;
  50
  51     info = g_malloc0(sizeof(*info));
  52     info->name = g_strdup("host");
  53
  54     entry = g_malloc0(sizeof(*entry));
  55     entry->value = info;
  56
  57     return entry;
  58 }
  59 #endif
  60
  61 static void s390_cpu_set_pc(CPUState *cs, vaddr value)
  62 {
  63     S390CPU *cpu = S390_CPU(cs);
  64
  65     cpu->env.psw.addr = value;
  66 }
  67
  68 /* CPUClass::reset() */
  69 static void s390_cpu_reset(CPUState *s)
  70 {
  71     S390CPU *cpu = S390_CPU(s);
  72     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
  73     CPUS390XState *env = &cpu->env;
  74
  75     s390_del_running_cpu(cpu);
  76
  77     scc->parent_reset(s);
  78
  79     memset(env, 0, offsetof(CPUS390XState, breakpoints));
  80
  81     /* architectured initial values for CR 0 and 14 */
  82     env->cregs[0] = CR0_RESET;
  83     env->cregs[14] = CR14_RESET;
  84     /* set halted to 1 to make sure we can add the cpu in
  85      * s390_ipl_cpu code, where CPUState::halted is set back to 0
  86      * after incrementing the cpu counter */
  87 #if !defined(CONFIG_USER_ONLY)
  88     s->halted = 1;
  89 #endif
  90     tlb_flush(env, 1);
  91 }
  92
  93 #if !defined(CONFIG_USER_ONLY)
  94 static void s390_cpu_machine_reset_cb(void *opaque)
  95 {
  96     S390CPU *cpu = opaque;
  97
  98     cpu_reset(CPU(cpu));
  99 }
 100 #endif
 101
 102 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
 103 {
 104     S390CPU *cpu = S390_CPU(dev);
 105     S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
 106
 107     cpu_reset(CPU(cpu));
 108
 109     scc->parent_realize(dev, errp);
 110 }
 111
 112 static void s390_cpu_initfn(Object *obj)
 113 {
 114     CPUState *cs = CPU(obj);
 115     S390CPU *cpu = S390_CPU(obj);
 116     CPUS390XState *env = &cpu->env;
 117     static bool inited;
 118     static int cpu_num = 0;
 119 #if !defined(CONFIG_USER_ONLY)
 120     struct tm tm;
 121 #endif
 122
 123     cs->env_ptr = env;
 124     cpu_exec_init(env);
 125 #if !defined(CONFIG_USER_ONLY)
 126     qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
 127     qemu_get_timedate(&tm, 0);
 128     env->tod_offset = TOD_UNIX_EPOCH +
 129                       (time2tod(mktimegm(&tm)) * 1000000000ULL);
 130     env->tod_basetime = 0;
 131     env->tod_timer = qemu_new_timer_ns(vm_clock, s390x_tod_timer, cpu);
 132     env->cpu_timer = qemu_new_timer_ns(vm_clock, s390x_cpu_timer, cpu);
 133     /* set CPUState::halted state to 1 to avoid decrementing the running
 134      * cpu counter in s390_cpu_reset to a negative number at
 135      * initial ipl */
 136     cs->halted = 1;
 137 #endif
 138     env->cpu_num = cpu_num++;
 139     env->ext_index = -1;
 140
 141     if (tcg_enabled() && !inited) {
 142         inited = true;
 143         s390x_translate_init();
 144     }
 145 }
 146
 147 static void s390_cpu_finalize(Object *obj)
 148 {
 149 #if !defined(CONFIG_USER_ONLY)
 150     S390CPU *cpu = S390_CPU(obj);
 151
 152     qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
 153 #endif
 154 }
 155
 156 static const VMStateDescription vmstate_s390_cpu = {
 157     .name = "cpu",
 158     .unmigratable = 1,
 159 };
 160
 161 static void s390_cpu_class_init(ObjectClass *oc, void *data)
 162 {
 163     S390CPUClass *scc = S390_CPU_CLASS(oc);
 164     CPUClass *cc = CPU_CLASS(scc);
 165     DeviceClass *dc = DEVICE_CLASS(oc);
 166
 167     scc->parent_realize = dc->realize;
 168     dc->realize = s390_cpu_realizefn;
 169
 170     scc->parent_reset = cc->reset;
 171     cc->reset = s390_cpu_reset;
 172
 173     cc->do_interrupt = s390_cpu_do_interrupt;
 174     cc->dump_state = s390_cpu_dump_state;
 175     cc->set_pc = s390_cpu_set_pc;
 176     cc->gdb_read_register = s390_cpu_gdb_read_register;
 177     cc->gdb_write_register = s390_cpu_gdb_write_register;
 178 #ifndef CONFIG_USER_ONLY
 179     cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
 180 #endif
 181     dc->vmsd = &vmstate_s390_cpu;
 182     cc->gdb_num_core_regs = S390_NUM_REGS;
 183 }
 184
 185 static const TypeInfo s390_cpu_type_info = {
 186     .name = TYPE_S390_CPU,
 187     .parent = TYPE_CPU,
 188     .instance_size = sizeof(S390CPU),
 189     .instance_init = s390_cpu_initfn,
 190     .instance_finalize = s390_cpu_finalize,
 191     .abstract = false,
 192     .class_size = sizeof(S390CPUClass),
 193     .class_init = s390_cpu_class_init,
 194 };
 195
 196 static void s390_cpu_register_types(void)
 197 {
 198     type_register_static(&s390_cpu_type_info);
 199 }
 200
 201 type_init(s390_cpu_register_types)