target/hppa/cpu.c

   1 /*
   2  * QEMU HPPA CPU
   3  *
   4  * Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
   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 "cpu.h"
  24 #include "qemu-common.h"
  25 #include "exec/exec-all.h"
  26 #include "fpu/softfloat.h"
  27
  28
  29 static void hppa_cpu_set_pc(CPUState *cs, vaddr value)
  30 {
  31     HPPACPU *cpu = HPPA_CPU(cs);
  32
  33     cpu->env.iaoq_f = value;
  34     cpu->env.iaoq_b = value + 4;
  35 }
  36
  37 static void hppa_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
  38 {
  39     HPPACPU *cpu = HPPA_CPU(cs);
  40
  41 #ifdef CONFIG_USER_ONLY
  42     cpu->env.iaoq_f = tb->pc;
  43     cpu->env.iaoq_b = tb->cs_base;
  44 #else
  45     /* Recover the IAOQ values from the GVA + PRIV.  */
  46     uint32_t priv = (tb->flags >> TB_FLAG_PRIV_SHIFT) & 3;
  47     target_ulong cs_base = tb->cs_base;
  48     target_ulong iasq_f = cs_base & ~0xffffffffull;
  49     int32_t diff = cs_base;
  50
  51     cpu->env.iasq_f = iasq_f;
  52     cpu->env.iaoq_f = (tb->pc & ~iasq_f) + priv;
  53     if (diff) {
  54         cpu->env.iaoq_b = cpu->env.iaoq_f + diff;
  55     }
  56 #endif
  57
  58     cpu->env.psw_n = (tb->flags & PSW_N) != 0;
  59 }
  60
  61 static bool hppa_cpu_has_work(CPUState *cs)
  62 {
  63     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  64 }
  65
  66 static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info)
  67 {
  68     info->mach = bfd_mach_hppa20;
  69     info->print_insn = print_insn_hppa;
  70 }
  71
  72 static void hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
  73                                          MMUAccessType access_type,
  74                                          int mmu_idx, uintptr_t retaddr)
  75 {
  76     HPPACPU *cpu = HPPA_CPU(cs);
  77     CPUHPPAState *env = &cpu->env;
  78
  79     cs->exception_index = EXCP_UNALIGN;
  80     if (env->psw & PSW_Q) {
  81         /* ??? Needs tweaking for hppa64.  */
  82         env->cr[CR_IOR] = addr;
  83         env->cr[CR_ISR] = addr >> 32;
  84     }
  85
  86     cpu_loop_exit_restore(cs, retaddr);
  87 }
  88
  89 static void hppa_cpu_realizefn(DeviceState *dev, Error **errp)
  90 {
  91     CPUState *cs = CPU(dev);
  92     HPPACPUClass *acc = HPPA_CPU_GET_CLASS(dev);
  93     Error *local_err = NULL;
  94
  95     cpu_exec_realizefn(cs, &local_err);
  96     if (local_err != NULL) {
  97         error_propagate(errp, local_err);
  98         return;
  99     }
 100
 101     qemu_init_vcpu(cs);
 102     acc->parent_realize(dev, errp);
 103
 104 #ifndef CONFIG_USER_ONLY
 105     {
 106         HPPACPU *cpu = HPPA_CPU(cs);
 107         cpu->alarm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
 108                                         hppa_cpu_alarm_timer, cpu);
 109     }
 110 #endif
 111 }
 112
 113 static void hppa_cpu_list_entry(gpointer data, gpointer user_data)
 114 {
 115     ObjectClass *oc = data;
 116     CPUListState *s = user_data;
 117
 118     (*s->cpu_fprintf)(s->file, "  %s\n", object_class_get_name(oc));
 119 }
 120
 121 void hppa_cpu_list(FILE *f, fprintf_function cpu_fprintf)
 122 {
 123     CPUListState s = {
 124         .file = f,
 125         .cpu_fprintf = cpu_fprintf,
 126     };
 127     GSList *list;
 128
 129     list = object_class_get_list_sorted(TYPE_HPPA_CPU, false);
 130     (*cpu_fprintf)(f, "Available CPUs:\n");
 131     g_slist_foreach(list, hppa_cpu_list_entry, &s);
 132     g_slist_free(list);
 133 }
 134
 135 static void hppa_cpu_initfn(Object *obj)
 136 {
 137     CPUState *cs = CPU(obj);
 138     HPPACPU *cpu = HPPA_CPU(obj);
 139     CPUHPPAState *env = &cpu->env;
 140
 141     cs->env_ptr = env;
 142     cs->exception_index = -1;
 143     cpu_hppa_loaded_fr0(env);
 144     cpu_hppa_put_psw(env, PSW_W);
 145 }
 146
 147 static ObjectClass *hppa_cpu_class_by_name(const char *cpu_model)
 148 {
 149     return object_class_by_name(TYPE_HPPA_CPU);
 150 }
 151
 152 static void hppa_cpu_class_init(ObjectClass *oc, void *data)
 153 {
 154     DeviceClass *dc = DEVICE_CLASS(oc);
 155     CPUClass *cc = CPU_CLASS(oc);
 156     HPPACPUClass *acc = HPPA_CPU_CLASS(oc);
 157
 158     device_class_set_parent_realize(dc, hppa_cpu_realizefn,
 159                                     &acc->parent_realize);
 160
 161     cc->class_by_name = hppa_cpu_class_by_name;
 162     cc->has_work = hppa_cpu_has_work;
 163     cc->do_interrupt = hppa_cpu_do_interrupt;
 164     cc->cpu_exec_interrupt = hppa_cpu_exec_interrupt;
 165     cc->dump_state = hppa_cpu_dump_state;
 166     cc->set_pc = hppa_cpu_set_pc;
 167     cc->synchronize_from_tb = hppa_cpu_synchronize_from_tb;
 168     cc->gdb_read_register = hppa_cpu_gdb_read_register;
 169     cc->gdb_write_register = hppa_cpu_gdb_write_register;
 170 #ifdef CONFIG_USER_ONLY
 171     cc->handle_mmu_fault = hppa_cpu_handle_mmu_fault;
 172 #else
 173     cc->get_phys_page_debug = hppa_cpu_get_phys_page_debug;
 174     dc->vmsd = &vmstate_hppa_cpu;
 175 #endif
 176     cc->do_unaligned_access = hppa_cpu_do_unaligned_access;
 177     cc->disas_set_info = hppa_cpu_disas_set_info;
 178     cc->tcg_initialize = hppa_translate_init;
 179
 180     cc->gdb_num_core_regs = 128;
 181 }
 182
 183 static const TypeInfo hppa_cpu_type_info = {
 184     .name = TYPE_HPPA_CPU,
 185     .parent = TYPE_CPU,
 186     .instance_size = sizeof(HPPACPU),
 187     .instance_init = hppa_cpu_initfn,
 188     .abstract = false,
 189     .class_size = sizeof(HPPACPUClass),
 190     .class_init = hppa_cpu_class_init,
 191 };
 192
 193 static void hppa_cpu_register_types(void)
 194 {
 195     type_register_static(&hppa_cpu_type_info);
 196 }
 197
 198 type_init(hppa_cpu_register_types)