osfmk/i386/startup64.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <string.h>
  30
  31 #include <mach/machine/vm_types.h>
  32
  33 #include <mach/boolean.h>
  34 #include <kern/thread.h>
  35 #include <kern/zalloc.h>
  36
  37 #include <kern/lock.h>
  38 #include <kern/kalloc.h>
  39 #include <kern/spl.h>
  40
  41 #include <vm/pmap.h>
  42 #include <vm/vm_map.h>
  43 #include <vm/vm_kern.h>
  44 #include <mach/vm_param.h>
  45 #include <mach/vm_prot.h>
  46 #include <vm/vm_object.h>
  47 #include <vm/vm_page.h>
  48
  49 #include <mach/machine/vm_param.h>
  50 #include <machine/thread.h>
  51
  52 #include <kern/misc_protos.h>                   /* prototyping */
  53 #include <i386/misc_protos.h>
  54
  55 #include <i386/cpuid.h>
  56 #include <i386/cpu_data.h>
  57 #include <i386/mp.h>
  58 #include <i386/cpu_number.h>
  59 #include <i386/machine_cpu.h>
  60 #include <i386/seg.h>
  61
  62 #include <vm/vm_protos.h>
  63
  64 #include <sys/kdebug.h>
  65
  66 #include <i386/postcode.h>
  67
  68 #ifdef __i386__
  69 void
  70 cpu_IA32e_enable(cpu_data_t *cdp)
  71 {
  72         assert(!ml_get_interrupts_enabled());
  73
  74         if (!cdp->cpu_is64bit ||
  75             (rdmsr64(MSR_IA32_EFER) & MSR_IA32_EFER_LMA) != 0)
  76                 return;
  77
  78         postcode(CPU_IA32_ENABLE_ENTRY);
  79
  80         /*
  81          * The following steps are performed by inlines so that
  82          * we can be assured we don't use the stack or any other
  83          * non-identity mapped data while paging is turned off...
  84          */
  85         /* Turn paging off */
  86         asm volatile(
  87                 "mov    %%cr0, %%eax    \n\t"
  88                 "andl   %0, %%eax       \n\t"
  89                 "mov    %%eax, %%cr0    \n\t"
  90                 :
  91                 : "i" (~CR0_PG)
  92                 : "eax" );
  93
  94         /* Pop new top level phys pg addr into CR3 */
  95         asm volatile(
  96                 "mov    %%eax, %%cr3    \n\t"
  97                 :
  98                 : "a" ((uint32_t) kernel64_cr3));
  99
 100         /* Turn on the 64-bit mode bit */
 101         asm volatile(
 102                 "rdmsr                  \n\t"
 103                 "orl    %1, %%eax       \n\t"
 104                 "wrmsr                  \n\t"
 105                 :
 106                 : "c" (MSR_IA32_EFER), "i" (MSR_IA32_EFER_LME)
 107                 : "eax", "edx");
 108
 109         /* Turn paging on again */
 110         asm volatile(
 111                 "mov    %%cr0, %%eax    \n\t"
 112                 "orl    %0, %%eax       \n\t"
 113                 "mov    %%eax, %%cr0    \n\t"
 114                 :
 115                 : "i" (CR0_PG)
 116                 : "eax" );
 117
 118 #if ONLY_SAFE_FOR_LINDA_SERIAL
 119         kprintf("cpu_IA32e_enable(%p)\n", cdp);
 120 #endif
 121
 122         if ((rdmsr64(MSR_IA32_EFER) & MSR_IA32_EFER_LMA) == 0)
 123                 panic("cpu_IA32e_enable() MSR_IA32_EFER_LMA not asserted");
 124
 125         cdp->cpu_kernel_cr3 = kernel64_cr3;
 126
 127         postcode(CPU_IA32_ENABLE_EXIT);
 128 }
 129
 130 void
 131 cpu_IA32e_disable(cpu_data_t *cdp)
 132 {
 133         assert(!ml_get_interrupts_enabled());
 134
 135         postcode(CPU_IA32_DISABLE_ENTRY);
 136
 137         if (!cdp->cpu_is64bit ||
 138             (rdmsr64(MSR_IA32_EFER) & MSR_IA32_EFER_LMA) == 0)
 139                 return;
 140
 141         /*
 142          * The following steps are performed by inlines so that
 143          * we can be assured we don't use the stack or any other
 144          * non-identity mapped data while paging is turned off...
 145          */
 146         /* Turn paging off */
 147         asm volatile(
 148                 "mov    %%cr0, %%eax    \n\t"
 149                 "andl   %0, %%eax       \n\t"
 150                 "mov    %%eax, %%cr0    \n\t"
 151                 :
 152                 : "i" (~CR0_PG)
 153                 : "eax" );
 154
 155         /* Pop legacy top level phys pg addr into CR3 */
 156         asm volatile(
 157                 "mov    %%eax, %%cr3    \n\t"
 158                 :
 159                 : "a" ((uint32_t) lo_kernel_cr3));
 160
 161         /* Turn off the 64-bit mode bit */
 162         asm volatile(
 163                 "rdmsr                  \n\t"
 164                 "andl   %1, %%eax       \n\t"
 165                 "wrmsr                  \n\t"
 166                 :
 167                 : "c" (MSR_IA32_EFER), "i" (~MSR_IA32_EFER_LME)
 168                 : "eax", "edx");
 169
 170         /* Turn paging on again */
 171         asm volatile(
 172                 "mov    %%cr0, %%eax    \n\t"
 173                 "orl    %0, %%eax       \n\t"
 174                 "mov    %%eax, %%cr0    \n\t"
 175                 :
 176                 : "i" (CR0_PG)
 177                 : "eax" );
 178
 179         kprintf("cpu_IA32e_disable(%p)\n", cdp);
 180
 181         if ((rdmsr64(MSR_IA32_EFER) & MSR_IA32_EFER_LMA) != 0)
 182                 panic("cpu_IA32e_disable() MSR_IA32_EFER_LMA not cleared");
 183
 184         cdp->cpu_kernel_cr3 = 0ULL;
 185
 186         postcode(CPU_IA32_DISABLE_EXIT);
 187 }
 188 #endif
 189
 190 #if DEBUG
 191 extern void dump_regs64(void);
 192 extern void dump_gdt(void *);
 193 extern void dump_ldt(void *);
 194 extern void dump_idt(void *);
 195 extern void dump_tss(void *);
 196 extern void dump_frame32(x86_saved_state_compat32_t *scp);
 197 extern void dump_frame64(x86_saved_state64_t *sp);
 198 extern void dump_frame(x86_saved_state_t *sp);
 199
 200 void
 201 dump_frame(x86_saved_state_t *sp)
 202 {
 203         if (is_saved_state32(sp))
 204                 dump_frame32((x86_saved_state_compat32_t *) sp);
 205         else if (is_saved_state64(sp))
 206                 dump_frame64(&sp->ss_64);
 207         else
 208                 kprintf("dump_frame(%p) unknown type %d\n", sp, sp->flavor);
 209 }
 210
 211 void
 212 dump_frame32(x86_saved_state_compat32_t *scp)
 213 {
 214         unsigned int    i;
 215         uint32_t        *ip = (uint32_t *) scp;
 216
 217         kprintf("dump_frame32(%p):\n", scp);
 218
 219         for (i = 0;
 220              i < sizeof(x86_saved_state_compat32_t)/sizeof(uint32_t);
 221              i++, ip++)
 222                 kprintf("%p: 0x%08x\n", ip, *ip);
 223
 224         kprintf("scp->isf64.err:    0x%016llx\n", scp->isf64.err);
 225         kprintf("scp->isf64.rip:    0x%016llx\n", scp->isf64.rip);
 226         kprintf("scp->isf64.cs:     0x%016llx\n", scp->isf64.cs);
 227         kprintf("scp->isf64.rflags: 0x%016llx\n", scp->isf64.rflags);
 228         kprintf("scp->isf64.rsp:    0x%016llx\n", scp->isf64.rsp);
 229         kprintf("scp->isf64.ss:     0x%016llx\n", scp->isf64.ss);
 230
 231         kprintf("scp->iss32.tag:    0x%08x\n", scp->iss32.tag);
 232         kprintf("scp->iss32.state.gs:     0x%08x\n", scp->iss32.state.gs);
 233         kprintf("scp->iss32.state.fs:     0x%08x\n", scp->iss32.state.fs);
 234         kprintf("scp->iss32.state.es:     0x%08x\n", scp->iss32.state.es);
 235         kprintf("scp->iss32.state.ds:     0x%08x\n", scp->iss32.state.ds);
 236         kprintf("scp->iss32.state.edi:    0x%08x\n", scp->iss32.state.edi);
 237         kprintf("scp->iss32.state.esi:    0x%08x\n", scp->iss32.state.esi);
 238         kprintf("scp->iss32.state.ebp:    0x%08x\n", scp->iss32.state.ebp);
 239         kprintf("scp->iss32.state.cr2:    0x%08x\n", scp->iss32.state.cr2);
 240         kprintf("scp->iss32.state.ebx:    0x%08x\n", scp->iss32.state.ebx);
 241         kprintf("scp->iss32.state.edx:    0x%08x\n", scp->iss32.state.edx);
 242         kprintf("scp->iss32.state.ecx:    0x%08x\n", scp->iss32.state.ecx);
 243         kprintf("scp->iss32.state.eax:    0x%08x\n", scp->iss32.state.eax);
 244         kprintf("scp->iss32.state.trapno: 0x%08x\n", scp->iss32.state.eax);
 245         kprintf("scp->iss32.state.eip:    0x%08x\n", scp->iss32.state.eip);
 246         kprintf("scp->iss32.state.cs:     0x%08x\n", scp->iss32.state.cs);
 247         kprintf("scp->iss32.state.efl:    0x%08x\n", scp->iss32.state.efl);
 248         kprintf("scp->iss32.state.uesp:   0x%08x\n", scp->iss32.state.uesp);
 249         kprintf("scp->iss32.state.ss:     0x%08x\n", scp->iss32.state.ss);
 250
 251         postcode(0x99);
 252 }
 253
 254 void
 255 dump_frame64(x86_saved_state64_t *sp)
 256 {
 257         unsigned int    i;
 258         uint64_t        *ip = (uint64_t *) sp;
 259
 260         kprintf("dump_frame64(%p):\n", sp);
 261
 262         for (i = 0;
 263              i < sizeof(x86_saved_state64_t)/sizeof(uint64_t);
 264              i++, ip++)
 265                 kprintf("%p: 0x%016llx\n", ip, *ip);
 266
 267         kprintf("sp->isf.trapno: 0x%08x\n", sp->isf.trapno);
 268         kprintf("sp->isf.trapfn: 0x%016llx\n", sp->isf.trapfn);
 269         kprintf("sp->isf.err:    0x%016llx\n", sp->isf.err);
 270         kprintf("sp->isf.rip:    0x%016llx\n", sp->isf.rip);
 271         kprintf("sp->isf.cs:     0x%016llx\n", sp->isf.cs);
 272         kprintf("sp->isf.rflags: 0x%016llx\n", sp->isf.rflags);
 273         kprintf("sp->isf.rsp:    0x%016llx\n", sp->isf.rsp);
 274         kprintf("sp->isf.ss:     0x%016llx\n", sp->isf.ss);
 275
 276         kprintf("sp->fs:         0x%016x\n", sp->fs);
 277         kprintf("sp->gs:         0x%016x\n", sp->gs);
 278         kprintf("sp->rax:        0x%016llx\n", sp->rax);
 279         kprintf("sp->rcx:        0x%016llx\n", sp->rcx);
 280         kprintf("sp->rbx:        0x%016llx\n", sp->rbx);
 281         kprintf("sp->rbp:        0x%016llx\n", sp->rbp);
 282         kprintf("sp->r11:        0x%016llx\n", sp->r11);
 283         kprintf("sp->r12:        0x%016llx\n", sp->r12);
 284         kprintf("sp->r13:        0x%016llx\n", sp->r13);
 285         kprintf("sp->r14:        0x%016llx\n", sp->r14);
 286         kprintf("sp->r15:        0x%016llx\n", sp->r15);
 287         kprintf("sp->cr2:        0x%016llx\n", sp->cr2);
 288         kprintf("sp->v_arg8:     0x%016llx\n", sp->v_arg8);
 289         kprintf("sp->v_arg7:     0x%016llx\n", sp->v_arg7);
 290         kprintf("sp->v_arg6:     0x%016llx\n", sp->v_arg6);
 291         kprintf("sp->r9:         0x%016llx\n", sp->r9);
 292         kprintf("sp->r8:         0x%016llx\n", sp->r8);
 293         kprintf("sp->r10:        0x%016llx\n", sp->r10);
 294         kprintf("sp->rdx:        0x%016llx\n", sp->rdx);
 295         kprintf("sp->rsi:        0x%016llx\n", sp->rsi);
 296         kprintf("sp->rdi:        0x%016llx\n", sp->rdi);
 297
 298         postcode(0x98);
 299 }
 300
 301 void
 302 dump_gdt(void *gdtp)
 303 {
 304         unsigned int    i;
 305         uint32_t        *ip = (uint32_t *) gdtp;
 306
 307         kprintf("GDT:\n");
 308         for (i = 0; i < GDTSZ; i++, ip += 2) {
 309                 kprintf("%p: 0x%08x\n", ip+0, *(ip+0));
 310                 kprintf("%p: 0x%08x\n", ip+1, *(ip+1));
 311         }
 312 }
 313
 314 void
 315 dump_ldt(void *ldtp)
 316 {
 317         unsigned int    i;
 318         uint32_t        *ip = (uint32_t *) ldtp;
 319
 320         kprintf("LDT:\n");
 321         for (i = 0; i < LDTSZ_MIN; i++, ip += 2) {
 322                 kprintf("%p: 0x%08x\n", ip+0, *(ip+0));
 323                 kprintf("%p: 0x%08x\n", ip+1, *(ip+1));
 324         }
 325 }
 326
 327 void
 328 dump_idt(void *idtp)
 329 {
 330         unsigned int    i;
 331         uint32_t        *ip = (uint32_t *) idtp;
 332
 333         kprintf("IDT64:\n");
 334         for (i = 0; i < 16; i++, ip += 4) {
 335                 kprintf("%p: 0x%08x\n", ip+0, *(ip+0));
 336                 kprintf("%p: 0x%08x\n", ip+1, *(ip+1));
 337                 kprintf("%p: 0x%08x\n", ip+2, *(ip+2));
 338                 kprintf("%p: 0x%08x\n", ip+3, *(ip+3));
 339         }
 340 }
 341
 342 void
 343 dump_tss(void *tssp)
 344 {
 345         unsigned int    i;
 346         uint32_t        *ip = (uint32_t *) tssp;
 347
 348         kprintf("TSS64:\n");
 349         for (i = 0; i < sizeof(master_ktss64)/sizeof(uint32_t); i++, ip++) {
 350                 kprintf("%p: 0x%08x\n", ip+0, *(ip+0));
 351         }
 352 }
 353
 354 #if defined(__x86_64__)
 355 void dump_regs64(void)
 356 {
 357
 358 #define SNAP_REG(reg)                                           \
 359         uint64_t        reg;                                    \
 360         __asm__ volatile("mov %%" #reg ", %0" : "=m" (reg))
 361
 362 #define KPRINT_REG(reg)                                         \
 363         kprintf("%3s: %p\n", #reg, (void *) reg)
 364
 365         SNAP_REG(rsp);
 366         SNAP_REG(rbp);
 367         SNAP_REG(rax);
 368         SNAP_REG(rbx);
 369         SNAP_REG(rcx);
 370         SNAP_REG(rdx);
 371         SNAP_REG(rsi);
 372         SNAP_REG(rdi);
 373         SNAP_REG(r8);
 374         SNAP_REG(r9);
 375         SNAP_REG(r10);
 376         SNAP_REG(r11);
 377         SNAP_REG(r12);
 378         SNAP_REG(r13);
 379         SNAP_REG(r14);
 380
 381         KPRINT_REG(rsp);
 382         KPRINT_REG(rbp);
 383         KPRINT_REG(rax);
 384         KPRINT_REG(rbx);
 385         KPRINT_REG(rcx);
 386         KPRINT_REG(rdx);
 387         KPRINT_REG(rsi);
 388         KPRINT_REG(rdi);
 389         KPRINT_REG(r8);
 390         KPRINT_REG(r9);
 391         KPRINT_REG(r10);
 392         KPRINT_REG(r11);
 393         KPRINT_REG(r12);
 394         KPRINT_REG(r13);
 395         KPRINT_REG(r14);
 396 }
 397 #endif /* __x86_64__ */
 398 #endif /* DEBUG */