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 "qemu/qemu-print.h"
  24 #include "qemu/timer.h"
  25 #include "cpu.h"
  26 #include "qemu/module.h"
  27 #include "exec/exec-all.h"
  28 #include "fpu/softfloat.h"
  29 #include "tcg/tcg.h"
  30
  31 static void hppa_cpu_set_pc(CPUState *cs, vaddr value)
  32 {
  33     HPPACPU *cpu = HPPA_CPU(cs);
  34
  35     cpu->env.iaoq_f = value;
  36     cpu->env.iaoq_b = value + 4;
  37 }
  38
  39 static vaddr hppa_cpu_get_pc(CPUState *cs)
  40 {
  41     HPPACPU *cpu = HPPA_CPU(cs);
  42
  43     return cpu->env.iaoq_f;
  44 }
  45
  46 static void hppa_cpu_synchronize_from_tb(CPUState *cs,
  47                                          const TranslationBlock *tb)
  48 {
  49     HPPACPU *cpu = HPPA_CPU(cs);
  50
  51     tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL));
  52
  53 #ifdef CONFIG_USER_ONLY
  54     cpu->env.iaoq_f = tb->pc;
  55     cpu->env.iaoq_b = tb->cs_base;
  56 #else
  57     /* Recover the IAOQ values from the GVA + PRIV.  */
  58     uint32_t priv = (tb->flags >> TB_FLAG_PRIV_SHIFT) & 3;
  59     target_ulong cs_base = tb->cs_base;
  60     target_ulong iasq_f = cs_base & ~0xffffffffull;
  61     int32_t diff = cs_base;
  62
  63     cpu->env.iasq_f = iasq_f;
  64     cpu->env.iaoq_f = (tb->pc & ~iasq_f) + priv;
  65     if (diff) {
  66         cpu->env.iaoq_b = cpu->env.iaoq_f + diff;
  67     }
  68 #endif
  69
  70     cpu->env.psw_n = (tb->flags & PSW_N) != 0;
  71 }
  72
  73 static void hppa_restore_state_to_opc(CPUState *cs,
  74                                       const TranslationBlock *tb,
  75                                       const uint64_t *data)
  76 {
  77     HPPACPU *cpu = HPPA_CPU(cs);
  78
  79     cpu->env.iaoq_f = data[0];
  80     if (data[1] != (target_ulong)-1) {
  81         cpu->env.iaoq_b = data[1];
  82     }
  83     cpu->env.unwind_breg = data[2];
  84     /*
  85      * Since we were executing the instruction at IAOQ_F, and took some
  86      * sort of action that provoked the cpu_restore_state, we can infer
  87      * that the instruction was not nullified.
  88      */
  89     cpu->env.psw_n = 0;
  90 }
  91
  92 static bool hppa_cpu_has_work(CPUState *cs)
  93 {
  94     return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
  95 }
  96
  97 static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info)
  98 {
  99     info->mach = bfd_mach_hppa20;
 100     info->print_insn = print_insn_hppa;
 101 }
 102
 103 #ifndef CONFIG_USER_ONLY
 104 static G_NORETURN
 105 void hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
 106                                   MMUAccessType access_type, int mmu_idx,
 107                                   uintptr_t retaddr)
 108 {
 109     HPPACPU *cpu = HPPA_CPU(cs);
 110     CPUHPPAState *env = &cpu->env;
 111
 112     cs->exception_index = EXCP_UNALIGN;
 113     hppa_set_ior_and_isr(env, addr, MMU_IDX_MMU_DISABLED(mmu_idx));
 114
 115     cpu_loop_exit_restore(cs, retaddr);
 116 }
 117 #endif /* CONFIG_USER_ONLY */
 118
 119 static void hppa_cpu_realizefn(DeviceState *dev, Error **errp)
 120 {
 121     CPUState *cs = CPU(dev);
 122     HPPACPUClass *acc = HPPA_CPU_GET_CLASS(dev);
 123     Error *local_err = NULL;
 124
 125     cpu_exec_realizefn(cs, &local_err);
 126     if (local_err != NULL) {
 127         error_propagate(errp, local_err);
 128         return;
 129     }
 130
 131     qemu_init_vcpu(cs);
 132     acc->parent_realize(dev, errp);
 133
 134 #ifndef CONFIG_USER_ONLY
 135     {
 136         HPPACPU *cpu = HPPA_CPU(cs);
 137
 138         cpu->alarm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
 139                                         hppa_cpu_alarm_timer, cpu);
 140         hppa_ptlbe(&cpu->env);
 141     }
 142 #endif
 143 }
 144
 145 static void hppa_cpu_initfn(Object *obj)
 146 {
 147     CPUState *cs = CPU(obj);
 148     HPPACPU *cpu = HPPA_CPU(obj);
 149     CPUHPPAState *env = &cpu->env;
 150
 151     cs->exception_index = -1;
 152     cpu_hppa_loaded_fr0(env);
 153     cpu_hppa_put_psw(env, PSW_W);
 154 }
 155
 156 static ObjectClass *hppa_cpu_class_by_name(const char *cpu_model)
 157 {
 158     g_autofree char *typename = g_strconcat(cpu_model, "-cpu", NULL);
 159     ObjectClass *oc = object_class_by_name(typename);
 160
 161     if (oc &&
 162         !object_class_is_abstract(oc) &&
 163         object_class_dynamic_cast(oc, TYPE_HPPA_CPU)) {
 164         return oc;
 165     }
 166     return NULL;
 167 }
 168
 169 static void hppa_cpu_list_entry(gpointer data, gpointer user_data)
 170 {
 171     ObjectClass *oc = data;
 172     CPUClass *cc = CPU_CLASS(oc);
 173     const char *tname = object_class_get_name(oc);
 174     g_autofree char *name = g_strndup(tname, strchr(tname, '-') - tname);
 175
 176     if (cc->deprecation_note) {
 177         qemu_printf("  %s (deprecated)\n", name);
 178     } else {
 179         qemu_printf("  %s\n", name);
 180     }
 181 }
 182
 183 void hppa_cpu_list(void)
 184 {
 185     GSList *list;
 186
 187     list = object_class_get_list_sorted(TYPE_HPPA_CPU, false);
 188     qemu_printf("Available CPUs:\n");
 189     g_slist_foreach(list, hppa_cpu_list_entry, NULL);
 190     g_slist_free(list);
 191 }
 192
 193 #ifndef CONFIG_USER_ONLY
 194 #include "hw/core/sysemu-cpu-ops.h"
 195
 196 static const struct SysemuCPUOps hppa_sysemu_ops = {
 197     .get_phys_page_debug = hppa_cpu_get_phys_page_debug,
 198 };
 199 #endif
 200
 201 #include "hw/core/tcg-cpu-ops.h"
 202
 203 static const struct TCGCPUOps hppa_tcg_ops = {
 204     .initialize = hppa_translate_init,
 205     .synchronize_from_tb = hppa_cpu_synchronize_from_tb,
 206     .restore_state_to_opc = hppa_restore_state_to_opc,
 207
 208 #ifndef CONFIG_USER_ONLY
 209     .tlb_fill = hppa_cpu_tlb_fill,
 210     .cpu_exec_interrupt = hppa_cpu_exec_interrupt,
 211     .do_interrupt = hppa_cpu_do_interrupt,
 212     .do_unaligned_access = hppa_cpu_do_unaligned_access,
 213 #endif /* !CONFIG_USER_ONLY */
 214 };
 215
 216 static void hppa_cpu_class_init(ObjectClass *oc, void *data)
 217 {
 218     DeviceClass *dc = DEVICE_CLASS(oc);
 219     CPUClass *cc = CPU_CLASS(oc);
 220     HPPACPUClass *acc = HPPA_CPU_CLASS(oc);
 221
 222     device_class_set_parent_realize(dc, hppa_cpu_realizefn,
 223                                     &acc->parent_realize);
 224
 225     cc->class_by_name = hppa_cpu_class_by_name;
 226     cc->has_work = hppa_cpu_has_work;
 227     cc->dump_state = hppa_cpu_dump_state;
 228     cc->set_pc = hppa_cpu_set_pc;
 229     cc->get_pc = hppa_cpu_get_pc;
 230     cc->gdb_read_register = hppa_cpu_gdb_read_register;
 231     cc->gdb_write_register = hppa_cpu_gdb_write_register;
 232 #ifndef CONFIG_USER_ONLY
 233     dc->vmsd = &vmstate_hppa_cpu;
 234     cc->sysemu_ops = &hppa_sysemu_ops;
 235 #endif
 236     cc->disas_set_info = hppa_cpu_disas_set_info;
 237     cc->gdb_num_core_regs = 128;
 238     cc->tcg_ops = &hppa_tcg_ops;
 239 }
 240
 241 static const TypeInfo hppa_cpu_type_infos[] = {
 242     {
 243         .name = TYPE_HPPA_CPU,
 244         .parent = TYPE_CPU,
 245         .instance_size = sizeof(HPPACPU),
 246         .instance_align = __alignof(HPPACPU),
 247         .instance_init = hppa_cpu_initfn,
 248         .abstract = false,
 249         .class_size = sizeof(HPPACPUClass),
 250         .class_init = hppa_cpu_class_init,
 251     },
 252     {
 253         .name = TYPE_HPPA64_CPU,
 254         .parent = TYPE_HPPA_CPU,
 255     },
 256 };
 257
 258 DEFINE_TYPES(hppa_cpu_type_infos)