target-i386/machine.c

   1 #include "hw/hw.h"
   2 #include "hw/boards.h"
   3 #include "hw/pc.h"
   4 #include "hw/isa.h"
   5
   6 #include "exec-all.h"
   7
   8 void register_machines(void)
   9 {
  10     qemu_register_machine(&pc_machine);
  11     qemu_register_machine(&isapc_machine);
  12 }
  13
  14 static void cpu_put_seg(QEMUFile *f, SegmentCache *dt)
  15 {
  16     qemu_put_be32(f, dt->selector);
  17     qemu_put_betl(f, dt->base);
  18     qemu_put_be32(f, dt->limit);
  19     qemu_put_be32(f, dt->flags);
  20 }
  21
  22 static void cpu_get_seg(QEMUFile *f, SegmentCache *dt)
  23 {
  24     dt->selector = qemu_get_be32(f);
  25     dt->base = qemu_get_betl(f);
  26     dt->limit = qemu_get_be32(f);
  27     dt->flags = qemu_get_be32(f);
  28 }
  29
  30 void cpu_save(QEMUFile *f, void *opaque)
  31 {
  32     CPUState *env = opaque;
  33     uint16_t fptag, fpus, fpuc, fpregs_format;
  34     uint32_t hflags;
  35     int32_t a20_mask;
  36     int i;
  37
  38     for(i = 0; i < CPU_NB_REGS; i++)
  39         qemu_put_betls(f, &env->regs[i]);
  40     qemu_put_betls(f, &env->eip);
  41     qemu_put_betls(f, &env->eflags);
  42     hflags = env->hflags; /* XXX: suppress most of the redundant hflags */
  43     qemu_put_be32s(f, &hflags);
  44
  45     /* FPU */
  46     fpuc = env->fpuc;
  47     fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
  48     fptag = 0;
  49     for(i = 0; i < 8; i++) {
  50         fptag |= ((!env->fptags[i]) << i);
  51     }
  52
  53     qemu_put_be16s(f, &fpuc);
  54     qemu_put_be16s(f, &fpus);
  55     qemu_put_be16s(f, &fptag);
  56
  57 #ifdef USE_X86LDOUBLE
  58     fpregs_format = 0;
  59 #else
  60     fpregs_format = 1;
  61 #endif
  62     qemu_put_be16s(f, &fpregs_format);
  63
  64     for(i = 0; i < 8; i++) {
  65 #ifdef USE_X86LDOUBLE
  66         {
  67             uint64_t mant;
  68             uint16_t exp;
  69             /* we save the real CPU data (in case of MMX usage only 'mant'
  70                contains the MMX register */
  71             cpu_get_fp80(&mant, &exp, env->fpregs[i].d);
  72             qemu_put_be64(f, mant);
  73             qemu_put_be16(f, exp);
  74         }
  75 #else
  76         /* if we use doubles for float emulation, we save the doubles to
  77            avoid losing information in case of MMX usage. It can give
  78            problems if the image is restored on a CPU where long
  79            doubles are used instead. */
  80         qemu_put_be64(f, env->fpregs[i].mmx.MMX_Q(0));
  81 #endif
  82     }
  83
  84     for(i = 0; i < 6; i++)
  85         cpu_put_seg(f, &env->segs[i]);
  86     cpu_put_seg(f, &env->ldt);
  87     cpu_put_seg(f, &env->tr);
  88     cpu_put_seg(f, &env->gdt);
  89     cpu_put_seg(f, &env->idt);
  90
  91     qemu_put_be32s(f, &env->sysenter_cs);
  92     qemu_put_betls(f, &env->sysenter_esp);
  93     qemu_put_betls(f, &env->sysenter_eip);
  94
  95     qemu_put_betls(f, &env->cr[0]);
  96     qemu_put_betls(f, &env->cr[2]);
  97     qemu_put_betls(f, &env->cr[3]);
  98     qemu_put_betls(f, &env->cr[4]);
  99
 100     for(i = 0; i < 8; i++)
 101         qemu_put_betls(f, &env->dr[i]);
 102
 103     /* MMU */
 104     a20_mask = (int32_t) env->a20_mask;
 105     qemu_put_sbe32s(f, &a20_mask);
 106
 107     /* XMM */
 108     qemu_put_be32s(f, &env->mxcsr);
 109     for(i = 0; i < CPU_NB_REGS; i++) {
 110         qemu_put_be64s(f, &env->xmm_regs[i].XMM_Q(0));
 111         qemu_put_be64s(f, &env->xmm_regs[i].XMM_Q(1));
 112     }
 113
 114 #ifdef TARGET_X86_64
 115     qemu_put_be64s(f, &env->efer);
 116     qemu_put_be64s(f, &env->star);
 117     qemu_put_be64s(f, &env->lstar);
 118     qemu_put_be64s(f, &env->cstar);
 119     qemu_put_be64s(f, &env->fmask);
 120     qemu_put_be64s(f, &env->kernelgsbase);
 121 #endif
 122     qemu_put_be32s(f, &env->smbase);
 123
 124     qemu_put_be64s(f, &env->pat);
 125     qemu_put_be32s(f, &env->hflags2);
 126
 127     qemu_put_be64s(f, &env->vm_hsave);
 128     qemu_put_be64s(f, &env->vm_vmcb);
 129     qemu_put_be64s(f, &env->tsc_offset);
 130     qemu_put_be64s(f, &env->intercept);
 131     qemu_put_be16s(f, &env->intercept_cr_read);
 132     qemu_put_be16s(f, &env->intercept_cr_write);
 133     qemu_put_be16s(f, &env->intercept_dr_read);
 134     qemu_put_be16s(f, &env->intercept_dr_write);
 135     qemu_put_be32s(f, &env->intercept_exceptions);
 136     qemu_put_8s(f, &env->v_tpr);
 137 }
 138
 139 #ifdef USE_X86LDOUBLE
 140 /* XXX: add that in a FPU generic layer */
 141 union x86_longdouble {
 142     uint64_t mant;
 143     uint16_t exp;
 144 };
 145
 146 #define MANTD1(fp)      (fp & ((1LL << 52) - 1))
 147 #define EXPBIAS1 1023
 148 #define EXPD1(fp)       ((fp >> 52) & 0x7FF)
 149 #define SIGND1(fp)      ((fp >> 32) & 0x80000000)
 150
 151 static void fp64_to_fp80(union x86_longdouble *p, uint64_t temp)
 152 {
 153     int e;
 154     /* mantissa */
 155     p->mant = (MANTD1(temp) << 11) | (1LL << 63);
 156     /* exponent + sign */
 157     e = EXPD1(temp) - EXPBIAS1 + 16383;
 158     e |= SIGND1(temp) >> 16;
 159     p->exp = e;
 160 }
 161 #endif
 162
 163 int cpu_load(QEMUFile *f, void *opaque, int version_id)
 164 {
 165     CPUState *env = opaque;
 166     int i, guess_mmx;
 167     uint32_t hflags;
 168     uint16_t fpus, fpuc, fptag, fpregs_format;
 169     int32_t a20_mask;
 170
 171     if (version_id != 3 && version_id != 4 && version_id != 5
 172         && version_id != 6 && version_id != 7)
 173         return -EINVAL;
 174     for(i = 0; i < CPU_NB_REGS; i++)
 175         qemu_get_betls(f, &env->regs[i]);
 176     qemu_get_betls(f, &env->eip);
 177     qemu_get_betls(f, &env->eflags);
 178     qemu_get_be32s(f, &hflags);
 179
 180     qemu_get_be16s(f, &fpuc);
 181     qemu_get_be16s(f, &fpus);
 182     qemu_get_be16s(f, &fptag);
 183     qemu_get_be16s(f, &fpregs_format);
 184
 185     /* NOTE: we cannot always restore the FPU state if the image come
 186        from a host with a different 'USE_X86LDOUBLE' define. We guess
 187        if we are in an MMX state to restore correctly in that case. */
 188     guess_mmx = ((fptag == 0xff) && (fpus & 0x3800) == 0);
 189     for(i = 0; i < 8; i++) {
 190         uint64_t mant;
 191         uint16_t exp;
 192
 193         switch(fpregs_format) {
 194         case 0:
 195             mant = qemu_get_be64(f);
 196             exp = qemu_get_be16(f);
 197 #ifdef USE_X86LDOUBLE
 198             env->fpregs[i].d = cpu_set_fp80(mant, exp);
 199 #else
 200             /* difficult case */
 201             if (guess_mmx)
 202                 env->fpregs[i].mmx.MMX_Q(0) = mant;
 203             else
 204                 env->fpregs[i].d = cpu_set_fp80(mant, exp);
 205 #endif
 206             break;
 207         case 1:
 208             mant = qemu_get_be64(f);
 209 #ifdef USE_X86LDOUBLE
 210             {
 211                 union x86_longdouble *p;
 212                 /* difficult case */
 213                 p = (void *)&env->fpregs[i];
 214                 if (guess_mmx) {
 215                     p->mant = mant;
 216                     p->exp = 0xffff;
 217                 } else {
 218                     fp64_to_fp80(p, mant);
 219                 }
 220             }
 221 #else
 222             env->fpregs[i].mmx.MMX_Q(0) = mant;
 223 #endif
 224             break;
 225         default:
 226             return -EINVAL;
 227         }
 228     }
 229
 230     env->fpuc = fpuc;
 231     /* XXX: restore FPU round state */
 232     env->fpstt = (fpus >> 11) & 7;
 233     env->fpus = fpus & ~0x3800;
 234     fptag ^= 0xff;
 235     for(i = 0; i < 8; i++) {
 236         env->fptags[i] = (fptag >> i) & 1;
 237     }
 238
 239     for(i = 0; i < 6; i++)
 240         cpu_get_seg(f, &env->segs[i]);
 241     cpu_get_seg(f, &env->ldt);
 242     cpu_get_seg(f, &env->tr);
 243     cpu_get_seg(f, &env->gdt);
 244     cpu_get_seg(f, &env->idt);
 245
 246     qemu_get_be32s(f, &env->sysenter_cs);
 247     if (version_id >= 7) {
 248         qemu_get_betls(f, &env->sysenter_esp);
 249         qemu_get_betls(f, &env->sysenter_eip);
 250     } else {
 251         env->sysenter_esp = qemu_get_be32(f);
 252         env->sysenter_eip = qemu_get_be32(f);
 253     }
 254
 255     qemu_get_betls(f, &env->cr[0]);
 256     qemu_get_betls(f, &env->cr[2]);
 257     qemu_get_betls(f, &env->cr[3]);
 258     qemu_get_betls(f, &env->cr[4]);
 259
 260     for(i = 0; i < 8; i++)
 261         qemu_get_betls(f, &env->dr[i]);
 262     cpu_breakpoint_remove_all(env, BP_CPU);
 263     cpu_watchpoint_remove_all(env, BP_CPU);
 264     for (i = 0; i < 4; i++)
 265         hw_breakpoint_insert(env, i);
 266
 267     /* MMU */
 268     qemu_get_sbe32s(f, &a20_mask);
 269     env->a20_mask = a20_mask;
 270
 271     qemu_get_be32s(f, &env->mxcsr);
 272     for(i = 0; i < CPU_NB_REGS; i++) {
 273         qemu_get_be64s(f, &env->xmm_regs[i].XMM_Q(0));
 274         qemu_get_be64s(f, &env->xmm_regs[i].XMM_Q(1));
 275     }
 276
 277 #ifdef TARGET_X86_64
 278     qemu_get_be64s(f, &env->efer);
 279     qemu_get_be64s(f, &env->star);
 280     qemu_get_be64s(f, &env->lstar);
 281     qemu_get_be64s(f, &env->cstar);
 282     qemu_get_be64s(f, &env->fmask);
 283     qemu_get_be64s(f, &env->kernelgsbase);
 284 #endif
 285     if (version_id >= 4) {
 286         qemu_get_be32s(f, &env->smbase);
 287     }
 288     if (version_id >= 5) {
 289         qemu_get_be64s(f, &env->pat);
 290         qemu_get_be32s(f, &env->hflags2);
 291         if (version_id < 6)
 292             qemu_get_be32s(f, &env->halted);
 293
 294         qemu_get_be64s(f, &env->vm_hsave);
 295         qemu_get_be64s(f, &env->vm_vmcb);
 296         qemu_get_be64s(f, &env->tsc_offset);
 297         qemu_get_be64s(f, &env->intercept);
 298         qemu_get_be16s(f, &env->intercept_cr_read);
 299         qemu_get_be16s(f, &env->intercept_cr_write);
 300         qemu_get_be16s(f, &env->intercept_dr_read);
 301         qemu_get_be16s(f, &env->intercept_dr_write);
 302         qemu_get_be32s(f, &env->intercept_exceptions);
 303         qemu_get_8s(f, &env->v_tpr);
 304     }
 305     /* XXX: ensure compatiblity for halted bit ? */
 306     /* XXX: compute redundant hflags bits */
 307     env->hflags = hflags;
 308     tlb_flush(env, 1);
 309     return 0;
 310 }