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 #if !defined(CONFIG_USER_ONLY)
  69 /* S390CPUClass::load_normal() */
  70 static void s390_cpu_load_normal(CPUState *s)
  71 {
  72     S390CPU *cpu = S390_CPU(s);
  73     cpu->env.psw.addr = ldl_phys(4) & PSW_MASK_ESA_ADDR;
  74     cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
  75     s390_add_running_cpu(cpu);
  76 }
  77 #endif
  78
  79 /* S390CPUClass::cpu_reset() */
  80 static void s390_cpu_reset(CPUState *s)
  81 {
  82     S390CPU *cpu = S390_CPU(s);
  83     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
  84     CPUS390XState *env = &cpu->env;
  85
  86     s390_del_running_cpu(cpu);
  87     scc->parent_reset(s);
  88 #if !defined(CONFIG_USER_ONLY)
  89     s->halted = 1;
  90 #endif
  91     tlb_flush(env, 1);
  92 }
  93
  94 /* S390CPUClass::initial_reset() */
  95 static void s390_cpu_initial_reset(CPUState *s)
  96 {
  97     S390CPU *cpu = S390_CPU(s);
  98     CPUS390XState *env = &cpu->env;
  99
 100     s390_cpu_reset(s);
 101     /* initial reset does not touch regs,fregs and aregs */
 102     memset(&env->fpc, 0, offsetof(CPUS390XState, breakpoints) -
 103                          offsetof(CPUS390XState, fpc));
 104
 105     /* architectured initial values for CR 0 and 14 */
 106     env->cregs[0] = CR0_RESET;
 107     env->cregs[14] = CR14_RESET;
 108 }
 109
 110 /* CPUClass:reset() */
 111 static void s390_cpu_full_reset(CPUState *s)
 112 {
 113     S390CPU *cpu = S390_CPU(s);
 114     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
 115     CPUS390XState *env = &cpu->env;
 116
 117     s390_del_running_cpu(cpu);
 118
 119     scc->parent_reset(s);
 120
 121     memset(env, 0, offsetof(CPUS390XState, breakpoints));
 122
 123     /* architectured initial values for CR 0 and 14 */
 124     env->cregs[0] = CR0_RESET;
 125     env->cregs[14] = CR14_RESET;
 126     /* set halted to 1 to make sure we can add the cpu in
 127      * s390_ipl_cpu code, where CPUState::halted is set back to 0
 128      * after incrementing the cpu counter */
 129 #if !defined(CONFIG_USER_ONLY)
 130     s->halted = 1;
 131 #endif
 132     tlb_flush(env, 1);
 133 }
 134
 135 #if !defined(CONFIG_USER_ONLY)
 136 static void s390_cpu_machine_reset_cb(void *opaque)
 137 {
 138     S390CPU *cpu = opaque;
 139
 140     cpu_reset(CPU(cpu));
 141 }
 142 #endif
 143
 144 static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
 145 {
 146     CPUState *cs = CPU(dev);
 147     S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
 148
 149     qemu_init_vcpu(cs);
 150     cpu_reset(cs);
 151
 152     scc->parent_realize(dev, errp);
 153 }
 154
 155 static void s390_cpu_initfn(Object *obj)
 156 {
 157     CPUState *cs = CPU(obj);
 158     S390CPU *cpu = S390_CPU(obj);
 159     CPUS390XState *env = &cpu->env;
 160     static bool inited;
 161     static int cpu_num = 0;
 162 #if !defined(CONFIG_USER_ONLY)
 163     struct tm tm;
 164 #endif
 165
 166     cs->env_ptr = env;
 167     cpu_exec_init(env);
 168 #if !defined(CONFIG_USER_ONLY)
 169     qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
 170     qemu_get_timedate(&tm, 0);
 171     env->tod_offset = TOD_UNIX_EPOCH +
 172                       (time2tod(mktimegm(&tm)) * 1000000000ULL);
 173     env->tod_basetime = 0;
 174     env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
 175     env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
 176     /* set CPUState::halted state to 1 to avoid decrementing the running
 177      * cpu counter in s390_cpu_reset to a negative number at
 178      * initial ipl */
 179     cs->halted = 1;
 180 #endif
 181     env->cpu_num = cpu_num++;
 182     env->ext_index = -1;
 183
 184     if (tcg_enabled() && !inited) {
 185         inited = true;
 186         s390x_translate_init();
 187     }
 188 }
 189
 190 static void s390_cpu_finalize(Object *obj)
 191 {
 192 #if !defined(CONFIG_USER_ONLY)
 193     S390CPU *cpu = S390_CPU(obj);
 194
 195     qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
 196 #endif
 197 }
 198
 199 static const VMStateDescription vmstate_s390_cpu = {
 200     .name = "cpu",
 201     .unmigratable = 1,
 202 };
 203
 204 static void s390_cpu_class_init(ObjectClass *oc, void *data)
 205 {
 206     S390CPUClass *scc = S390_CPU_CLASS(oc);
 207     CPUClass *cc = CPU_CLASS(scc);
 208     DeviceClass *dc = DEVICE_CLASS(oc);
 209
 210     scc->parent_realize = dc->realize;
 211     dc->realize = s390_cpu_realizefn;
 212
 213     scc->parent_reset = cc->reset;
 214 #if !defined(CONFIG_USER_ONLY)
 215     scc->load_normal = s390_cpu_load_normal;
 216 #endif
 217     scc->cpu_reset = s390_cpu_reset;
 218     scc->initial_cpu_reset = s390_cpu_initial_reset;
 219     cc->reset = s390_cpu_full_reset;
 220     cc->do_interrupt = s390_cpu_do_interrupt;
 221     cc->dump_state = s390_cpu_dump_state;
 222     cc->set_pc = s390_cpu_set_pc;
 223     cc->gdb_read_register = s390_cpu_gdb_read_register;
 224     cc->gdb_write_register = s390_cpu_gdb_write_register;
 225 #ifndef CONFIG_USER_ONLY
 226     cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
 227     cc->write_elf64_note = s390_cpu_write_elf64_note;
 228     cc->write_elf64_qemunote = s390_cpu_write_elf64_qemunote;
 229 #endif
 230     dc->vmsd = &vmstate_s390_cpu;
 231     cc->gdb_num_core_regs = S390_NUM_REGS;
 232 }
 233
 234 static const TypeInfo s390_cpu_type_info = {
 235     .name = TYPE_S390_CPU,
 236     .parent = TYPE_CPU,
 237     .instance_size = sizeof(S390CPU),
 238     .instance_init = s390_cpu_initfn,
 239     .instance_finalize = s390_cpu_finalize,
 240     .abstract = false,
 241     .class_size = sizeof(S390CPUClass),
 242     .class_init = s390_cpu_class_init,
 243 };
 244
 245 static void s390_cpu_register_types(void)
 246 {
 247     type_register_static(&s390_cpu_type_info);
 248 }
 249
 250 type_init(s390_cpu_register_types)