target/lm32/cpu.c

   1 /*
   2  * QEMU LatticeMico32 CPU
   3  *
   4  * Copyright (c) 2012 SUSE LINUX Products GmbH
   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 2.1 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
  18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "qapi/error.h"
  23 #include "qemu/qemu-print.h"
  24 #include "cpu.h"
  25
  26
  27 static void lm32_cpu_set_pc(CPUState *cs, vaddr value)
  28 {
  29     LM32CPU *cpu = LM32_CPU(cs);
  30
  31     cpu->env.pc = value;
  32 }
  33
  34 static void lm32_cpu_list_entry(gpointer data, gpointer user_data)
  35 {
  36     ObjectClass *oc = data;
  37     const char *typename = object_class_get_name(oc);
  38     char *name;
  39
  40     name = g_strndup(typename, strlen(typename) - strlen(LM32_CPU_TYPE_SUFFIX));
  41     qemu_printf("  %s\n", name);
  42     g_free(name);
  43 }
  44
  45
  46 void lm32_cpu_list(void)
  47 {
  48     GSList *list;
  49
  50     list = object_class_get_list_sorted(TYPE_LM32_CPU, false);
  51     qemu_printf("Available CPUs:\n");
  52     g_slist_foreach(list, lm32_cpu_list_entry, NULL);
  53     g_slist_free(list);
  54 }
  55
  56 static void lm32_cpu_init_cfg_reg(LM32CPU *cpu)
  57 {
  58     CPULM32State *env = &cpu->env;
  59     uint32_t cfg = 0;
  60
  61     if (cpu->features & LM32_FEATURE_MULTIPLY) {
  62         cfg |= CFG_M;
  63     }
  64
  65     if (cpu->features & LM32_FEATURE_DIVIDE) {
  66         cfg |= CFG_D;
  67     }
  68
  69     if (cpu->features & LM32_FEATURE_SHIFT) {
  70         cfg |= CFG_S;
  71     }
  72
  73     if (cpu->features & LM32_FEATURE_SIGN_EXTEND) {
  74         cfg |= CFG_X;
  75     }
  76
  77     if (cpu->features & LM32_FEATURE_I_CACHE) {
  78         cfg |= CFG_IC;
  79     }
  80
  81     if (cpu->features & LM32_FEATURE_D_CACHE) {
  82         cfg |= CFG_DC;
  83     }
  84
  85     if (cpu->features & LM32_FEATURE_CYCLE_COUNT) {
  86         cfg |= CFG_CC;
  87     }
  88
  89     cfg |= (cpu->num_interrupts << CFG_INT_SHIFT);
  90     cfg |= (cpu->num_breakpoints << CFG_BP_SHIFT);
  91     cfg |= (cpu->num_watchpoints << CFG_WP_SHIFT);
  92     cfg |= (cpu->revision << CFG_REV_SHIFT);
  93
  94     env->cfg = cfg;
  95 }
  96
  97 static bool lm32_cpu_has_work(CPUState *cs)
  98 {
  99     return cs->interrupt_request & CPU_INTERRUPT_HARD;
 100 }
 101
 102 static void lm32_cpu_reset(DeviceState *dev)
 103 {
 104     CPUState *s = CPU(dev);
 105     LM32CPU *cpu = LM32_CPU(s);
 106     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
 107     CPULM32State *env = &cpu->env;
 108
 109     lcc->parent_reset(dev);
 110
 111     /* reset cpu state */
 112     memset(env, 0, offsetof(CPULM32State, end_reset_fields));
 113
 114     lm32_cpu_init_cfg_reg(cpu);
 115 }
 116
 117 static void lm32_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
 118 {
 119     info->mach = bfd_mach_lm32;
 120     info->print_insn = print_insn_lm32;
 121 }
 122
 123 static void lm32_cpu_realizefn(DeviceState *dev, Error **errp)
 124 {
 125     CPUState *cs = CPU(dev);
 126     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(dev);
 127     Error *local_err = NULL;
 128
 129     cpu_exec_realizefn(cs, &local_err);
 130     if (local_err != NULL) {
 131         error_propagate(errp, local_err);
 132         return;
 133     }
 134
 135     cpu_reset(cs);
 136
 137     qemu_init_vcpu(cs);
 138
 139     lcc->parent_realize(dev, errp);
 140 }
 141
 142 static void lm32_cpu_initfn(Object *obj)
 143 {
 144     LM32CPU *cpu = LM32_CPU(obj);
 145     CPULM32State *env = &cpu->env;
 146
 147     cpu_set_cpustate_pointers(cpu);
 148
 149     env->flags = 0;
 150 }
 151
 152 static void lm32_basic_cpu_initfn(Object *obj)
 153 {
 154     LM32CPU *cpu = LM32_CPU(obj);
 155
 156     cpu->revision = 3;
 157     cpu->num_interrupts = 32;
 158     cpu->num_breakpoints = 4;
 159     cpu->num_watchpoints = 4;
 160     cpu->features = LM32_FEATURE_SHIFT
 161                   | LM32_FEATURE_SIGN_EXTEND
 162                   | LM32_FEATURE_CYCLE_COUNT;
 163 }
 164
 165 static void lm32_standard_cpu_initfn(Object *obj)
 166 {
 167     LM32CPU *cpu = LM32_CPU(obj);
 168
 169     cpu->revision = 3;
 170     cpu->num_interrupts = 32;
 171     cpu->num_breakpoints = 4;
 172     cpu->num_watchpoints = 4;
 173     cpu->features = LM32_FEATURE_MULTIPLY
 174                   | LM32_FEATURE_DIVIDE
 175                   | LM32_FEATURE_SHIFT
 176                   | LM32_FEATURE_SIGN_EXTEND
 177                   | LM32_FEATURE_I_CACHE
 178                   | LM32_FEATURE_CYCLE_COUNT;
 179 }
 180
 181 static void lm32_full_cpu_initfn(Object *obj)
 182 {
 183     LM32CPU *cpu = LM32_CPU(obj);
 184
 185     cpu->revision = 3;
 186     cpu->num_interrupts = 32;
 187     cpu->num_breakpoints = 4;
 188     cpu->num_watchpoints = 4;
 189     cpu->features = LM32_FEATURE_MULTIPLY
 190                   | LM32_FEATURE_DIVIDE
 191                   | LM32_FEATURE_SHIFT
 192                   | LM32_FEATURE_SIGN_EXTEND
 193                   | LM32_FEATURE_I_CACHE
 194                   | LM32_FEATURE_D_CACHE
 195                   | LM32_FEATURE_CYCLE_COUNT;
 196 }
 197
 198 static ObjectClass *lm32_cpu_class_by_name(const char *cpu_model)
 199 {
 200     ObjectClass *oc;
 201     char *typename;
 202
 203     typename = g_strdup_printf(LM32_CPU_TYPE_NAME("%s"), cpu_model);
 204     oc = object_class_by_name(typename);
 205     g_free(typename);
 206     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_LM32_CPU) ||
 207                        object_class_is_abstract(oc))) {
 208         oc = NULL;
 209     }
 210     return oc;
 211 }
 212
 213 static void lm32_cpu_class_init(ObjectClass *oc, void *data)
 214 {
 215     LM32CPUClass *lcc = LM32_CPU_CLASS(oc);
 216     CPUClass *cc = CPU_CLASS(oc);
 217     DeviceClass *dc = DEVICE_CLASS(oc);
 218
 219     device_class_set_parent_realize(dc, lm32_cpu_realizefn,
 220                                     &lcc->parent_realize);
 221     device_class_set_parent_reset(dc, lm32_cpu_reset, &lcc->parent_reset);
 222
 223     cc->class_by_name = lm32_cpu_class_by_name;
 224     cc->has_work = lm32_cpu_has_work;
 225     cc->do_interrupt = lm32_cpu_do_interrupt;
 226     cc->cpu_exec_interrupt = lm32_cpu_exec_interrupt;
 227     cc->dump_state = lm32_cpu_dump_state;
 228     cc->set_pc = lm32_cpu_set_pc;
 229     cc->gdb_read_register = lm32_cpu_gdb_read_register;
 230     cc->gdb_write_register = lm32_cpu_gdb_write_register;
 231     cc->tlb_fill = lm32_cpu_tlb_fill;
 232 #ifndef CONFIG_USER_ONLY
 233     cc->get_phys_page_debug = lm32_cpu_get_phys_page_debug;
 234     cc->vmsd = &vmstate_lm32_cpu;
 235 #endif
 236     cc->gdb_num_core_regs = 32 + 7;
 237     cc->gdb_stop_before_watchpoint = true;
 238     cc->debug_excp_handler = lm32_debug_excp_handler;
 239     cc->disas_set_info = lm32_cpu_disas_set_info;
 240     cc->tcg_initialize = lm32_translate_init;
 241 }
 242
 243 #define DEFINE_LM32_CPU_TYPE(cpu_model, initfn) \
 244     { \
 245         .parent = TYPE_LM32_CPU, \
 246         .name = LM32_CPU_TYPE_NAME(cpu_model), \
 247         .instance_init = initfn, \
 248     }
 249
 250 static const TypeInfo lm32_cpus_type_infos[] = {
 251     { /* base class should be registered first */
 252          .name = TYPE_LM32_CPU,
 253          .parent = TYPE_CPU,
 254          .instance_size = sizeof(LM32CPU),
 255          .instance_init = lm32_cpu_initfn,
 256          .abstract = true,
 257          .class_size = sizeof(LM32CPUClass),
 258          .class_init = lm32_cpu_class_init,
 259     },
 260     DEFINE_LM32_CPU_TYPE("lm32-basic", lm32_basic_cpu_initfn),
 261     DEFINE_LM32_CPU_TYPE("lm32-standard", lm32_standard_cpu_initfn),
 262     DEFINE_LM32_CPU_TYPE("lm32-full", lm32_full_cpu_initfn),
 263 };
 264
 265 DEFINE_TYPES(lm32_cpus_type_infos)