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