target/i386/tcg/tcg-cpu.c

   1 /*
   2  * i386 TCG cpu class initialization
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   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 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 <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "tcg-cpu.h"
  23 #include "exec/exec-all.h"
  24 #include "sysemu/runstate.h"
  25 #include "helper-tcg.h"
  26
  27 #if !defined(CONFIG_USER_ONLY)
  28 #include "hw/i386/apic.h"
  29 #endif
  30
  31 /* Frob eflags into and out of the CPU temporary format.  */
  32
  33 static void x86_cpu_exec_enter(CPUState *cs)
  34 {
  35     X86CPU *cpu = X86_CPU(cs);
  36     CPUX86State *env = &cpu->env;
  37
  38     CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
  39     env->df = 1 - (2 * ((env->eflags >> 10) & 1));
  40     CC_OP = CC_OP_EFLAGS;
  41     env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
  42 }
  43
  44 static void x86_cpu_exec_exit(CPUState *cs)
  45 {
  46     X86CPU *cpu = X86_CPU(cs);
  47     CPUX86State *env = &cpu->env;
  48
  49     env->eflags = cpu_compute_eflags(env);
  50 }
  51
  52 static void x86_cpu_synchronize_from_tb(CPUState *cs,
  53                                         const TranslationBlock *tb)
  54 {
  55     X86CPU *cpu = X86_CPU(cs);
  56
  57     cpu->env.eip = tb->pc - tb->cs_base;
  58 }
  59
  60 #include "hw/core/tcg-cpu-ops.h"
  61
  62 static struct TCGCPUOps x86_tcg_ops = {
  63     .initialize = tcg_x86_init,
  64     .synchronize_from_tb = x86_cpu_synchronize_from_tb,
  65     .cpu_exec_enter = x86_cpu_exec_enter,
  66     .cpu_exec_exit = x86_cpu_exec_exit,
  67     .cpu_exec_interrupt = x86_cpu_exec_interrupt,
  68     .do_interrupt = x86_cpu_do_interrupt,
  69     .tlb_fill = x86_cpu_tlb_fill,
  70 #ifndef CONFIG_USER_ONLY
  71     .debug_excp_handler = breakpoint_handler,
  72 #endif /* !CONFIG_USER_ONLY */
  73 };
  74
  75 void tcg_cpu_common_class_init(CPUClass *cc)
  76 {
  77     cc->tcg_ops = &x86_tcg_ops;
  78 }