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     if (env->psw & PSW_Q) {
 114         /* ??? Needs tweaking for hppa64.  */
 115         env->cr[CR_IOR] = addr;
 116         env->cr[CR_ISR] = addr >> 32;
 117     }
 118
 119     cpu_loop_exit_restore(cs, retaddr);
 120 }
 121 #endif /* CONFIG_USER_ONLY */
 122
 123 static void hppa_cpu_realizefn(DeviceState *dev, Error **errp)
 124 {
 125     CPUState *cs = CPU(dev);
 126     HPPACPUClass *acc = HPPA_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     qemu_init_vcpu(cs);
 136     acc->parent_realize(dev, errp);
 137
 138 #ifndef CONFIG_USER_ONLY
 139     {
 140         HPPACPU *cpu = HPPA_CPU(cs);
 141
 142         cpu->alarm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
 143                                         hppa_cpu_alarm_timer, cpu);
 144         hppa_ptlbe(&cpu->env);
 145     }
 146 #endif
 147 }
 148
 149 static void hppa_cpu_initfn(Object *obj)
 150 {
 151     CPUState *cs = CPU(obj);
 152     HPPACPU *cpu = HPPA_CPU(obj);
 153     CPUHPPAState *env = &cpu->env;
 154
 155     cs->exception_index = -1;
 156     cpu_hppa_loaded_fr0(env);
 157     cpu_hppa_put_psw(env, PSW_W);
 158 }
 159
 160 static ObjectClass *hppa_cpu_class_by_name(const char *cpu_model)
 161 {
 162     g_autofree char *typename = g_strconcat(cpu_model, "-cpu", NULL);
 163     ObjectClass *oc = object_class_by_name(typename);
 164
 165     if (oc &&
 166         !object_class_is_abstract(oc) &&
 167         object_class_dynamic_cast(oc, TYPE_HPPA_CPU)) {
 168         return oc;
 169     }
 170     return NULL;
 171 }
 172
 173 static void hppa_cpu_list_entry(gpointer data, gpointer user_data)
 174 {
 175     ObjectClass *oc = data;
 176     CPUClass *cc = CPU_CLASS(oc);
 177     const char *tname = object_class_get_name(oc);
 178     g_autofree char *name = g_strndup(tname, strchr(tname, '-') - tname);
 179
 180     if (cc->deprecation_note) {
 181         qemu_printf("  %s (deprecated)\n", name);
 182     } else {
 183         qemu_printf("  %s\n", name);
 184     }
 185 }
 186
 187 void hppa_cpu_list(void)
 188 {
 189     GSList *list;
 190
 191     list = object_class_get_list_sorted(TYPE_HPPA_CPU, false);
 192     qemu_printf("Available CPUs:\n");
 193     g_slist_foreach(list, hppa_cpu_list_entry, NULL);
 194     g_slist_free(list);
 195 }
 196
 197 #ifndef CONFIG_USER_ONLY
 198 #include "hw/core/sysemu-cpu-ops.h"
 199
 200 static const struct SysemuCPUOps hppa_sysemu_ops = {
 201     .get_phys_page_debug = hppa_cpu_get_phys_page_debug,
 202 };
 203 #endif
 204
 205 #include "hw/core/tcg-cpu-ops.h"
 206
 207 static const struct TCGCPUOps hppa_tcg_ops = {
 208     .initialize = hppa_translate_init,
 209     .synchronize_from_tb = hppa_cpu_synchronize_from_tb,
 210     .restore_state_to_opc = hppa_restore_state_to_opc,
 211
 212 #ifndef CONFIG_USER_ONLY
 213     .tlb_fill = hppa_cpu_tlb_fill,
 214     .cpu_exec_interrupt = hppa_cpu_exec_interrupt,
 215     .do_interrupt = hppa_cpu_do_interrupt,
 216     .do_unaligned_access = hppa_cpu_do_unaligned_access,
 217 #endif /* !CONFIG_USER_ONLY */
 218 };
 219
 220 static void hppa_cpu_class_init(ObjectClass *oc, void *data)
 221 {
 222     DeviceClass *dc = DEVICE_CLASS(oc);
 223     CPUClass *cc = CPU_CLASS(oc);
 224     HPPACPUClass *acc = HPPA_CPU_CLASS(oc);
 225
 226     device_class_set_parent_realize(dc, hppa_cpu_realizefn,
 227                                     &acc->parent_realize);
 228
 229     cc->class_by_name = hppa_cpu_class_by_name;
 230     cc->has_work = hppa_cpu_has_work;
 231     cc->dump_state = hppa_cpu_dump_state;
 232     cc->set_pc = hppa_cpu_set_pc;
 233     cc->get_pc = hppa_cpu_get_pc;
 234     cc->gdb_read_register = hppa_cpu_gdb_read_register;
 235     cc->gdb_write_register = hppa_cpu_gdb_write_register;
 236 #ifndef CONFIG_USER_ONLY
 237     dc->vmsd = &vmstate_hppa_cpu;
 238     cc->sysemu_ops = &hppa_sysemu_ops;
 239 #endif
 240     cc->disas_set_info = hppa_cpu_disas_set_info;
 241     cc->gdb_num_core_regs = 128;
 242     cc->tcg_ops = &hppa_tcg_ops;
 243 }
 244
 245 static const TypeInfo hppa_cpu_type_infos[] = {
 246     {
 247         .name = TYPE_HPPA_CPU,
 248         .parent = TYPE_CPU,
 249         .instance_size = sizeof(HPPACPU),
 250         .instance_align = __alignof(HPPACPU),
 251         .instance_init = hppa_cpu_initfn,
 252         .abstract = false,
 253         .class_size = sizeof(HPPACPUClass),
 254         .class_init = hppa_cpu_class_init,
 255     },
 256     {
 257         .name = TYPE_HPPA64_CPU,
 258         .parent = TYPE_HPPA_CPU,
 259     },
 260 };
 261
 262 DEFINE_TYPES(hppa_cpu_type_infos)