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 "exec/helper-proto.h"
  22
  23 /* SMM support */
  24
  25 #if defined(CONFIG_USER_ONLY)
  26
  27 void do_smm_enter(X86CPU *cpu)
  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(X86CPU *cpu)
  44 {
  45     CPUX86State *env = &cpu->env;
  46     CPUState *cs = CPU(cpu);
  47     target_ulong sm_state;
  48     SegmentCache *dt;
  49     int i, offset;
  50
  51     qemu_log_mask(CPU_LOG_INT, "SMM: enter\n");
  52     log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
  53
  54     env->hflags |= HF_SMM_MASK;
  55     cpu_smm_update(env);
  56
  57     sm_state = env->smbase + 0x8000;
  58
  59 #ifdef TARGET_X86_64
  60     for (i = 0; i < 6; i++) {
  61         dt = &env->segs[i];
  62         offset = 0x7e00 + i * 16;
  63         stw_phys(cs->as, sm_state + offset, dt->selector);
  64         stw_phys(cs->as, sm_state + offset + 2, (dt->flags >> 8) & 0xf0ff);
  65         stl_phys(cs->as, sm_state + offset + 4, dt->limit);
  66         stq_phys(cs->as, sm_state + offset + 8, dt->base);
  67     }
  68
  69     stq_phys(cs->as, sm_state + 0x7e68, env->gdt.base);
  70     stl_phys(cs->as, sm_state + 0x7e64, env->gdt.limit);
  71
  72     stw_phys(cs->as, sm_state + 0x7e70, env->ldt.selector);
  73     stq_phys(cs->as, sm_state + 0x7e78, env->ldt.base);
  74     stl_phys(cs->as, sm_state + 0x7e74, env->ldt.limit);
  75     stw_phys(cs->as, sm_state + 0x7e72, (env->ldt.flags >> 8) & 0xf0ff);
  76
  77     stq_phys(cs->as, sm_state + 0x7e88, env->idt.base);
  78     stl_phys(cs->as, sm_state + 0x7e84, env->idt.limit);
  79
  80     stw_phys(cs->as, sm_state + 0x7e90, env->tr.selector);
  81     stq_phys(cs->as, sm_state + 0x7e98, env->tr.base);
  82     stl_phys(cs->as, sm_state + 0x7e94, env->tr.limit);
  83     stw_phys(cs->as, sm_state + 0x7e92, (env->tr.flags >> 8) & 0xf0ff);
  84
  85     stq_phys(cs->as, sm_state + 0x7ed0, env->efer);
  86
  87     stq_phys(cs->as, sm_state + 0x7ff8, env->regs[R_EAX]);
  88     stq_phys(cs->as, sm_state + 0x7ff0, env->regs[R_ECX]);
  89     stq_phys(cs->as, sm_state + 0x7fe8, env->regs[R_EDX]);
  90     stq_phys(cs->as, sm_state + 0x7fe0, env->regs[R_EBX]);
  91     stq_phys(cs->as, sm_state + 0x7fd8, env->regs[R_ESP]);
  92     stq_phys(cs->as, sm_state + 0x7fd0, env->regs[R_EBP]);
  93     stq_phys(cs->as, sm_state + 0x7fc8, env->regs[R_ESI]);
  94     stq_phys(cs->as, sm_state + 0x7fc0, env->regs[R_EDI]);
  95     for (i = 8; i < 16; i++) {
  96         stq_phys(cs->as, sm_state + 0x7ff8 - i * 8, env->regs[i]);
  97     }
  98     stq_phys(cs->as, sm_state + 0x7f78, env->eip);
  99     stl_phys(cs->as, sm_state + 0x7f70, cpu_compute_eflags(env));
 100     stl_phys(cs->as, sm_state + 0x7f68, env->dr[6]);
 101     stl_phys(cs->as, sm_state + 0x7f60, env->dr[7]);
 102
 103     stl_phys(cs->as, sm_state + 0x7f48, env->cr[4]);
 104     stl_phys(cs->as, sm_state + 0x7f50, env->cr[3]);
 105     stl_phys(cs->as, sm_state + 0x7f58, env->cr[0]);
 106
 107     stl_phys(cs->as, sm_state + 0x7efc, SMM_REVISION_ID);
 108     stl_phys(cs->as, sm_state + 0x7f00, env->smbase);
 109 #else
 110     stl_phys(cs->as, sm_state + 0x7ffc, env->cr[0]);
 111     stl_phys(cs->as, sm_state + 0x7ff8, env->cr[3]);
 112     stl_phys(cs->as, sm_state + 0x7ff4, cpu_compute_eflags(env));
 113     stl_phys(cs->as, sm_state + 0x7ff0, env->eip);
 114     stl_phys(cs->as, sm_state + 0x7fec, env->regs[R_EDI]);
 115     stl_phys(cs->as, sm_state + 0x7fe8, env->regs[R_ESI]);
 116     stl_phys(cs->as, sm_state + 0x7fe4, env->regs[R_EBP]);
 117     stl_phys(cs->as, sm_state + 0x7fe0, env->regs[R_ESP]);
 118     stl_phys(cs->as, sm_state + 0x7fdc, env->regs[R_EBX]);
 119     stl_phys(cs->as, sm_state + 0x7fd8, env->regs[R_EDX]);
 120     stl_phys(cs->as, sm_state + 0x7fd4, env->regs[R_ECX]);
 121     stl_phys(cs->as, sm_state + 0x7fd0, env->regs[R_EAX]);
 122     stl_phys(cs->as, sm_state + 0x7fcc, env->dr[6]);
 123     stl_phys(cs->as, sm_state + 0x7fc8, env->dr[7]);
 124
 125     stl_phys(cs->as, sm_state + 0x7fc4, env->tr.selector);
 126     stl_phys(cs->as, sm_state + 0x7f64, env->tr.base);
 127     stl_phys(cs->as, sm_state + 0x7f60, env->tr.limit);
 128     stl_phys(cs->as, sm_state + 0x7f5c, (env->tr.flags >> 8) & 0xf0ff);
 129
 130     stl_phys(cs->as, sm_state + 0x7fc0, env->ldt.selector);
 131     stl_phys(cs->as, sm_state + 0x7f80, env->ldt.base);
 132     stl_phys(cs->as, sm_state + 0x7f7c, env->ldt.limit);
 133     stl_phys(cs->as, sm_state + 0x7f78, (env->ldt.flags >> 8) & 0xf0ff);
 134
 135     stl_phys(cs->as, sm_state + 0x7f74, env->gdt.base);
 136     stl_phys(cs->as, sm_state + 0x7f70, env->gdt.limit);
 137
 138     stl_phys(cs->as, sm_state + 0x7f58, env->idt.base);
 139     stl_phys(cs->as, sm_state + 0x7f54, env->idt.limit);
 140
 141     for (i = 0; i < 6; i++) {
 142         dt = &env->segs[i];
 143         if (i < 3) {
 144             offset = 0x7f84 + i * 12;
 145         } else {
 146             offset = 0x7f2c + (i - 3) * 12;
 147         }
 148         stl_phys(cs->as, sm_state + 0x7fa8 + i * 4, dt->selector);
 149         stl_phys(cs->as, sm_state + offset + 8, dt->base);
 150         stl_phys(cs->as, sm_state + offset + 4, dt->limit);
 151         stl_phys(cs->as, sm_state + offset, (dt->flags >> 8) & 0xf0ff);
 152     }
 153     stl_phys(cs->as, sm_state + 0x7f14, env->cr[4]);
 154
 155     stl_phys(cs->as, sm_state + 0x7efc, SMM_REVISION_ID);
 156     stl_phys(cs->as, sm_state + 0x7ef8, env->smbase);
 157 #endif
 158     /* init SMM cpu state */
 159
 160 #ifdef TARGET_X86_64
 161     cpu_load_efer(env, 0);
 162 #endif
 163     cpu_load_eflags(env, 0, ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C |
 164                               DF_MASK));
 165     env->eip = 0x00008000;
 166     cpu_x86_update_cr0(env,
 167                        env->cr[0] & ~(CR0_PE_MASK | CR0_EM_MASK | CR0_TS_MASK |
 168                                       CR0_PG_MASK));
 169     cpu_x86_update_cr4(env, 0);
 170     env->dr[7] = 0x00000400;
 171
 172     cpu_x86_load_seg_cache(env, R_CS, (env->smbase >> 4) & 0xffff, env->smbase,
 173                            0xffffffff,
 174                            DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
 175                            DESC_A_MASK);
 176     cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffffffff,
 177                            DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
 178                            DESC_A_MASK);
 179     cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffffffff,
 180                            DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
 181                            DESC_A_MASK);
 182     cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffffffff,
 183                            DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
 184                            DESC_A_MASK);
 185     cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffffffff,
 186                            DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
 187                            DESC_A_MASK);
 188     cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffffffff,
 189                            DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
 190                            DESC_A_MASK);
 191 }
 192
 193 void helper_rsm(CPUX86State *env)
 194 {
 195     X86CPU *cpu = x86_env_get_cpu(env);
 196     CPUState *cs = CPU(cpu);
 197     target_ulong sm_state;
 198     int i, offset;
 199     uint32_t val;
 200
 201     sm_state = env->smbase + 0x8000;
 202 #ifdef TARGET_X86_64
 203     cpu_load_efer(env, ldq_phys(cs->as, sm_state + 0x7ed0));
 204
 205     env->gdt.base = ldq_phys(cs->as, sm_state + 0x7e68);
 206     env->gdt.limit = ldl_phys(cs->as, sm_state + 0x7e64);
 207
 208     env->ldt.selector = lduw_phys(cs->as, sm_state + 0x7e70);
 209     env->ldt.base = ldq_phys(cs->as, sm_state + 0x7e78);
 210     env->ldt.limit = ldl_phys(cs->as, sm_state + 0x7e74);
 211     env->ldt.flags = (lduw_phys(cs->as, sm_state + 0x7e72) & 0xf0ff) << 8;
 212
 213     env->idt.base = ldq_phys(cs->as, sm_state + 0x7e88);
 214     env->idt.limit = ldl_phys(cs->as, sm_state + 0x7e84);
 215
 216     env->tr.selector = lduw_phys(cs->as, sm_state + 0x7e90);
 217     env->tr.base = ldq_phys(cs->as, sm_state + 0x7e98);
 218     env->tr.limit = ldl_phys(cs->as, sm_state + 0x7e94);
 219     env->tr.flags = (lduw_phys(cs->as, sm_state + 0x7e92) & 0xf0ff) << 8;
 220
 221     env->regs[R_EAX] = ldq_phys(cs->as, sm_state + 0x7ff8);
 222     env->regs[R_ECX] = ldq_phys(cs->as, sm_state + 0x7ff0);
 223     env->regs[R_EDX] = ldq_phys(cs->as, sm_state + 0x7fe8);
 224     env->regs[R_EBX] = ldq_phys(cs->as, sm_state + 0x7fe0);
 225     env->regs[R_ESP] = ldq_phys(cs->as, sm_state + 0x7fd8);
 226     env->regs[R_EBP] = ldq_phys(cs->as, sm_state + 0x7fd0);
 227     env->regs[R_ESI] = ldq_phys(cs->as, sm_state + 0x7fc8);
 228     env->regs[R_EDI] = ldq_phys(cs->as, sm_state + 0x7fc0);
 229     for (i = 8; i < 16; i++) {
 230         env->regs[i] = ldq_phys(cs->as, sm_state + 0x7ff8 - i * 8);
 231     }
 232     env->eip = ldq_phys(cs->as, sm_state + 0x7f78);
 233     cpu_load_eflags(env, ldl_phys(cs->as, sm_state + 0x7f70),
 234                     ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
 235     env->dr[6] = ldl_phys(cs->as, sm_state + 0x7f68);
 236     env->dr[7] = ldl_phys(cs->as, sm_state + 0x7f60);
 237
 238     cpu_x86_update_cr4(env, ldl_phys(cs->as, sm_state + 0x7f48));
 239     cpu_x86_update_cr3(env, ldl_phys(cs->as, sm_state + 0x7f50));
 240     cpu_x86_update_cr0(env, ldl_phys(cs->as, sm_state + 0x7f58));
 241
 242     for (i = 0; i < 6; i++) {
 243         offset = 0x7e00 + i * 16;
 244         cpu_x86_load_seg_cache(env, i,
 245                                lduw_phys(cs->as, sm_state + offset),
 246                                ldq_phys(cs->as, sm_state + offset + 8),
 247                                ldl_phys(cs->as, sm_state + offset + 4),
 248                                (lduw_phys(cs->as, sm_state + offset + 2) &
 249                                 0xf0ff) << 8);
 250     }
 251
 252     val = ldl_phys(cs->as, sm_state + 0x7efc); /* revision ID */
 253     if (val & 0x20000) {
 254         env->smbase = ldl_phys(cs->as, sm_state + 0x7f00) & ~0x7fff;
 255     }
 256 #else
 257     cpu_x86_update_cr0(env, ldl_phys(cs->as, sm_state + 0x7ffc));
 258     cpu_x86_update_cr3(env, ldl_phys(cs->as, sm_state + 0x7ff8));
 259     cpu_load_eflags(env, ldl_phys(cs->as, sm_state + 0x7ff4),
 260                     ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
 261     env->eip = ldl_phys(cs->as, sm_state + 0x7ff0);
 262     env->regs[R_EDI] = ldl_phys(cs->as, sm_state + 0x7fec);
 263     env->regs[R_ESI] = ldl_phys(cs->as, sm_state + 0x7fe8);
 264     env->regs[R_EBP] = ldl_phys(cs->as, sm_state + 0x7fe4);
 265     env->regs[R_ESP] = ldl_phys(cs->as, sm_state + 0x7fe0);
 266     env->regs[R_EBX] = ldl_phys(cs->as, sm_state + 0x7fdc);
 267     env->regs[R_EDX] = ldl_phys(cs->as, sm_state + 0x7fd8);
 268     env->regs[R_ECX] = ldl_phys(cs->as, sm_state + 0x7fd4);
 269     env->regs[R_EAX] = ldl_phys(cs->as, sm_state + 0x7fd0);
 270     env->dr[6] = ldl_phys(cs->as, sm_state + 0x7fcc);
 271     env->dr[7] = ldl_phys(cs->as, sm_state + 0x7fc8);
 272
 273     env->tr.selector = ldl_phys(cs->as, sm_state + 0x7fc4) & 0xffff;
 274     env->tr.base = ldl_phys(cs->as, sm_state + 0x7f64);
 275     env->tr.limit = ldl_phys(cs->as, sm_state + 0x7f60);
 276     env->tr.flags = (ldl_phys(cs->as, sm_state + 0x7f5c) & 0xf0ff) << 8;
 277
 278     env->ldt.selector = ldl_phys(cs->as, sm_state + 0x7fc0) & 0xffff;
 279     env->ldt.base = ldl_phys(cs->as, sm_state + 0x7f80);
 280     env->ldt.limit = ldl_phys(cs->as, sm_state + 0x7f7c);
 281     env->ldt.flags = (ldl_phys(cs->as, sm_state + 0x7f78) & 0xf0ff) << 8;
 282
 283     env->gdt.base = ldl_phys(cs->as, sm_state + 0x7f74);
 284     env->gdt.limit = ldl_phys(cs->as, sm_state + 0x7f70);
 285
 286     env->idt.base = ldl_phys(cs->as, sm_state + 0x7f58);
 287     env->idt.limit = ldl_phys(cs->as, sm_state + 0x7f54);
 288
 289     for (i = 0; i < 6; i++) {
 290         if (i < 3) {
 291             offset = 0x7f84 + i * 12;
 292         } else {
 293             offset = 0x7f2c + (i - 3) * 12;
 294         }
 295         cpu_x86_load_seg_cache(env, i,
 296                                ldl_phys(cs->as,
 297                                         sm_state + 0x7fa8 + i * 4) & 0xffff,
 298                                ldl_phys(cs->as, sm_state + offset + 8),
 299                                ldl_phys(cs->as, sm_state + offset + 4),
 300                                (ldl_phys(cs->as,
 301                                          sm_state + offset) & 0xf0ff) << 8);
 302     }
 303     cpu_x86_update_cr4(env, ldl_phys(cs->as, sm_state + 0x7f14));
 304
 305     val = ldl_phys(cs->as, sm_state + 0x7efc); /* revision ID */
 306     if (val & 0x20000) {
 307         env->smbase = ldl_phys(cs->as, sm_state + 0x7ef8) & ~0x7fff;
 308     }
 309 #endif
 310     env->hflags &= ~HF_SMM_MASK;
 311     cpu_smm_update(env);
 312
 313     qemu_log_mask(CPU_LOG_INT, "SMM: after RSM\n");
 314     log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
 315 }
 316
 317 #endif /* !CONFIG_USER_ONLY */