target-i386/smm_helper.c

   1 /*
   2  *  x86 SMM helpers
   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 "cpu.h"
  21 #include "helper.h"
  22
  23 /* SMM support */
  24
  25 #if defined(CONFIG_USER_ONLY)
  26
  27 void do_smm_enter(CPUX86State *env)
  28 {
  29 }
  30
  31 void helper_rsm(CPUX86State *env)
  32 {
  33 }
  34
  35 #else
  36
  37 #ifdef TARGET_X86_64
  38 #define SMM_REVISION_ID 0x00020064
  39 #else
  40 #define SMM_REVISION_ID 0x00020000
  41 #endif
  42
  43 void do_smm_enter(CPUX86State *env)
  44 {
  45     target_ulong sm_state;
  46     SegmentCache *dt;
  47     int i, offset;
  48
  49     qemu_log_mask(CPU_LOG_INT, "SMM: enter\n");
  50     log_cpu_state_mask(CPU_LOG_INT, env, CPU_DUMP_CCOP);
  51
  52     env->hflags |= HF_SMM_MASK;
  53     cpu_smm_update(env);
  54
  55     sm_state = env->smbase + 0x8000;
  56
  57 #ifdef TARGET_X86_64
  58     for (i = 0; i < 6; i++) {
  59         dt = &env->segs[i];
  60         offset = 0x7e00 + i * 16;
  61         stw_phys(sm_state + offset, dt->selector);
  62         stw_phys(sm_state + offset + 2, (dt->flags >> 8) & 0xf0ff);
  63         stl_phys(sm_state + offset + 4, dt->limit);
  64         stq_phys(sm_state + offset + 8, dt->base);
  65     }
  66
  67     stq_phys(sm_state + 0x7e68, env->gdt.base);
  68     stl_phys(sm_state + 0x7e64, env->gdt.limit);
  69
  70     stw_phys(sm_state + 0x7e70, env->ldt.selector);
  71     stq_phys(sm_state + 0x7e78, env->ldt.base);
  72     stl_phys(sm_state + 0x7e74, env->ldt.limit);
  73     stw_phys(sm_state + 0x7e72, (env->ldt.flags >> 8) & 0xf0ff);
  74
  75     stq_phys(sm_state + 0x7e88, env->idt.base);
  76     stl_phys(sm_state + 0x7e84, env->idt.limit);
  77
  78     stw_phys(sm_state + 0x7e90, env->tr.selector);
  79     stq_phys(sm_state + 0x7e98, env->tr.base);
  80     stl_phys(sm_state + 0x7e94, env->tr.limit);
  81     stw_phys(sm_state + 0x7e92, (env->tr.flags >> 8) & 0xf0ff);
  82
  83     stq_phys(sm_state + 0x7ed0, env->efer);
  84
  85     stq_phys(sm_state + 0x7ff8, EAX);
  86     stq_phys(sm_state + 0x7ff0, ECX);
  87     stq_phys(sm_state + 0x7fe8, EDX);
  88     stq_phys(sm_state + 0x7fe0, EBX);
  89     stq_phys(sm_state + 0x7fd8, ESP);
  90     stq_phys(sm_state + 0x7fd0, EBP);
  91     stq_phys(sm_state + 0x7fc8, ESI);
  92     stq_phys(sm_state + 0x7fc0, EDI);
  93     for (i = 8; i < 16; i++) {
  94         stq_phys(sm_state + 0x7ff8 - i * 8, env->regs[i]);
  95     }
  96     stq_phys(sm_state + 0x7f78, env->eip);
  97     stl_phys(sm_state + 0x7f70, cpu_compute_eflags(env));
  98     stl_phys(sm_state + 0x7f68, env->dr[6]);
  99     stl_phys(sm_state + 0x7f60, env->dr[7]);
 100
 101     stl_phys(sm_state + 0x7f48, env->cr[4]);
 102     stl_phys(sm_state + 0x7f50, env->cr[3]);
 103     stl_phys(sm_state + 0x7f58, env->cr[0]);
 104
 105     stl_phys(sm_state + 0x7efc, SMM_REVISION_ID);
 106     stl_phys(sm_state + 0x7f00, env->smbase);
 107 #else
 108     stl_phys(sm_state + 0x7ffc, env->cr[0]);
 109     stl_phys(sm_state + 0x7ff8, env->cr[3]);
 110     stl_phys(sm_state + 0x7ff4, cpu_compute_eflags(env));
 111     stl_phys(sm_state + 0x7ff0, env->eip);
 112     stl_phys(sm_state + 0x7fec, EDI);
 113     stl_phys(sm_state + 0x7fe8, ESI);
 114     stl_phys(sm_state + 0x7fe4, EBP);
 115     stl_phys(sm_state + 0x7fe0, ESP);
 116     stl_phys(sm_state + 0x7fdc, EBX);
 117     stl_phys(sm_state + 0x7fd8, EDX);
 118     stl_phys(sm_state + 0x7fd4, ECX);
 119     stl_phys(sm_state + 0x7fd0, EAX);
 120     stl_phys(sm_state + 0x7fcc, env->dr[6]);
 121     stl_phys(sm_state + 0x7fc8, env->dr[7]);
 122
 123     stl_phys(sm_state + 0x7fc4, env->tr.selector);
 124     stl_phys(sm_state + 0x7f64, env->tr.base);
 125     stl_phys(sm_state + 0x7f60, env->tr.limit);
 126     stl_phys(sm_state + 0x7f5c, (env->tr.flags >> 8) & 0xf0ff);
 127
 128     stl_phys(sm_state + 0x7fc0, env->ldt.selector);
 129     stl_phys(sm_state + 0x7f80, env->ldt.base);
 130     stl_phys(sm_state + 0x7f7c, env->ldt.limit);
 131     stl_phys(sm_state + 0x7f78, (env->ldt.flags >> 8) & 0xf0ff);
 132
 133     stl_phys(sm_state + 0x7f74, env->gdt.base);
 134     stl_phys(sm_state + 0x7f70, env->gdt.limit);
 135
 136     stl_phys(sm_state + 0x7f58, env->idt.base);
 137     stl_phys(sm_state + 0x7f54, env->idt.limit);
 138
 139     for (i = 0; i < 6; i++) {
 140         dt = &env->segs[i];
 141         if (i < 3) {
 142             offset = 0x7f84 + i * 12;
 143         } else {
 144             offset = 0x7f2c + (i - 3) * 12;
 145         }
 146         stl_phys(sm_state + 0x7fa8 + i * 4, dt->selector);
 147         stl_phys(sm_state + offset + 8, dt->base);
 148         stl_phys(sm_state + offset + 4, dt->limit);
 149         stl_phys(sm_state + offset, (dt->flags >> 8) & 0xf0ff);
 150     }
 151     stl_phys(sm_state + 0x7f14, env->cr[4]);
 152
 153     stl_phys(sm_state + 0x7efc, SMM_REVISION_ID);
 154     stl_phys(sm_state + 0x7ef8, env->smbase);
 155 #endif
 156     /* init SMM cpu state */
 157
 158 #ifdef TARGET_X86_64
 159     cpu_load_efer(env, 0);
 160 #endif
 161     cpu_load_eflags(env, 0, ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C |
 162                               DF_MASK));
 163     env->eip = 0x00008000;
 164     cpu_x86_load_seg_cache(env, R_CS, (env->smbase >> 4) & 0xffff, env->smbase,
 165                            0xffffffff, 0);
 166     cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffffffff, 0);
 167     cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffffffff, 0);
 168     cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffffffff, 0);
 169     cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffffffff, 0);
 170     cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffffffff, 0);
 171
 172     cpu_x86_update_cr0(env,
 173                        env->cr[0] & ~(CR0_PE_MASK | CR0_EM_MASK | CR0_TS_MASK |
 174                                       CR0_PG_MASK));
 175     cpu_x86_update_cr4(env, 0);
 176     env->dr[7] = 0x00000400;
 177     CC_OP = CC_OP_EFLAGS;
 178 }
 179
 180 void helper_rsm(CPUX86State *env)
 181 {
 182     target_ulong sm_state;
 183     int i, offset;
 184     uint32_t val;
 185
 186     sm_state = env->smbase + 0x8000;
 187 #ifdef TARGET_X86_64
 188     cpu_load_efer(env, ldq_phys(sm_state + 0x7ed0));
 189
 190     for (i = 0; i < 6; i++) {
 191         offset = 0x7e00 + i * 16;
 192         cpu_x86_load_seg_cache(env, i,
 193                                lduw_phys(sm_state + offset),
 194                                ldq_phys(sm_state + offset + 8),
 195                                ldl_phys(sm_state + offset + 4),
 196                                (lduw_phys(sm_state + offset + 2) &
 197                                 0xf0ff) << 8);
 198     }
 199
 200     env->gdt.base = ldq_phys(sm_state + 0x7e68);
 201     env->gdt.limit = ldl_phys(sm_state + 0x7e64);
 202
 203     env->ldt.selector = lduw_phys(sm_state + 0x7e70);
 204     env->ldt.base = ldq_phys(sm_state + 0x7e78);
 205     env->ldt.limit = ldl_phys(sm_state + 0x7e74);
 206     env->ldt.flags = (lduw_phys(sm_state + 0x7e72) & 0xf0ff) << 8;
 207
 208     env->idt.base = ldq_phys(sm_state + 0x7e88);
 209     env->idt.limit = ldl_phys(sm_state + 0x7e84);
 210
 211     env->tr.selector = lduw_phys(sm_state + 0x7e90);
 212     env->tr.base = ldq_phys(sm_state + 0x7e98);
 213     env->tr.limit = ldl_phys(sm_state + 0x7e94);
 214     env->tr.flags = (lduw_phys(sm_state + 0x7e92) & 0xf0ff) << 8;
 215
 216     EAX = ldq_phys(sm_state + 0x7ff8);
 217     ECX = ldq_phys(sm_state + 0x7ff0);
 218     EDX = ldq_phys(sm_state + 0x7fe8);
 219     EBX = ldq_phys(sm_state + 0x7fe0);
 220     ESP = ldq_phys(sm_state + 0x7fd8);
 221     EBP = ldq_phys(sm_state + 0x7fd0);
 222     ESI = ldq_phys(sm_state + 0x7fc8);
 223     EDI = ldq_phys(sm_state + 0x7fc0);
 224     for (i = 8; i < 16; i++) {
 225         env->regs[i] = ldq_phys(sm_state + 0x7ff8 - i * 8);
 226     }
 227     env->eip = ldq_phys(sm_state + 0x7f78);
 228     cpu_load_eflags(env, ldl_phys(sm_state + 0x7f70),
 229                     ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
 230     env->dr[6] = ldl_phys(sm_state + 0x7f68);
 231     env->dr[7] = ldl_phys(sm_state + 0x7f60);
 232
 233     cpu_x86_update_cr4(env, ldl_phys(sm_state + 0x7f48));
 234     cpu_x86_update_cr3(env, ldl_phys(sm_state + 0x7f50));
 235     cpu_x86_update_cr0(env, ldl_phys(sm_state + 0x7f58));
 236
 237     val = ldl_phys(sm_state + 0x7efc); /* revision ID */
 238     if (val & 0x20000) {
 239         env->smbase = ldl_phys(sm_state + 0x7f00) & ~0x7fff;
 240     }
 241 #else
 242     cpu_x86_update_cr0(env, ldl_phys(sm_state + 0x7ffc));
 243     cpu_x86_update_cr3(env, ldl_phys(sm_state + 0x7ff8));
 244     cpu_load_eflags(env, ldl_phys(sm_state + 0x7ff4),
 245                     ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
 246     env->eip = ldl_phys(sm_state + 0x7ff0);
 247     EDI = ldl_phys(sm_state + 0x7fec);
 248     ESI = ldl_phys(sm_state + 0x7fe8);
 249     EBP = ldl_phys(sm_state + 0x7fe4);
 250     ESP = ldl_phys(sm_state + 0x7fe0);
 251     EBX = ldl_phys(sm_state + 0x7fdc);
 252     EDX = ldl_phys(sm_state + 0x7fd8);
 253     ECX = ldl_phys(sm_state + 0x7fd4);
 254     EAX = ldl_phys(sm_state + 0x7fd0);
 255     env->dr[6] = ldl_phys(sm_state + 0x7fcc);
 256     env->dr[7] = ldl_phys(sm_state + 0x7fc8);
 257
 258     env->tr.selector = ldl_phys(sm_state + 0x7fc4) & 0xffff;
 259     env->tr.base = ldl_phys(sm_state + 0x7f64);
 260     env->tr.limit = ldl_phys(sm_state + 0x7f60);
 261     env->tr.flags = (ldl_phys(sm_state + 0x7f5c) & 0xf0ff) << 8;
 262
 263     env->ldt.selector = ldl_phys(sm_state + 0x7fc0) & 0xffff;
 264     env->ldt.base = ldl_phys(sm_state + 0x7f80);
 265     env->ldt.limit = ldl_phys(sm_state + 0x7f7c);
 266     env->ldt.flags = (ldl_phys(sm_state + 0x7f78) & 0xf0ff) << 8;
 267
 268     env->gdt.base = ldl_phys(sm_state + 0x7f74);
 269     env->gdt.limit = ldl_phys(sm_state + 0x7f70);
 270
 271     env->idt.base = ldl_phys(sm_state + 0x7f58);
 272     env->idt.limit = ldl_phys(sm_state + 0x7f54);
 273
 274     for (i = 0; i < 6; i++) {
 275         if (i < 3) {
 276             offset = 0x7f84 + i * 12;
 277         } else {
 278             offset = 0x7f2c + (i - 3) * 12;
 279         }
 280         cpu_x86_load_seg_cache(env, i,
 281                                ldl_phys(sm_state + 0x7fa8 + i * 4) & 0xffff,
 282                                ldl_phys(sm_state + offset + 8),
 283                                ldl_phys(sm_state + offset + 4),
 284                                (ldl_phys(sm_state + offset) & 0xf0ff) << 8);
 285     }
 286     cpu_x86_update_cr4(env, ldl_phys(sm_state + 0x7f14));
 287
 288     val = ldl_phys(sm_state + 0x7efc); /* revision ID */
 289     if (val & 0x20000) {
 290         env->smbase = ldl_phys(sm_state + 0x7ef8) & ~0x7fff;
 291     }
 292 #endif
 293     CC_OP = CC_OP_EFLAGS;
 294     env->hflags &= ~HF_SMM_MASK;
 295     cpu_smm_update(env);
 296
 297     qemu_log_mask(CPU_LOG_INT, "SMM: after RSM\n");
 298     log_cpu_state_mask(CPU_LOG_INT, env, CPU_DUMP_CCOP);
 299 }
 300
 301 #endif /* !CONFIG_USER_ONLY */