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