sys/i386/acpica/acpi_wakeup.c

   1 /*-
   2  * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
   3  * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  * $DragonFly: src/sys/i386/acpica/Attic/acpi_wakeup.c,v 1.2 2004/02/12 23:33:26 joerg Exp $
  27  */
  28
  29 #include <sys/cdefs.h>
  30
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/bus.h>
  35 #include <sys/lock.h>
  36 #include <sys/proc.h>
  37 #include <sys/sysctl.h>
  38
  39 #include <vm/vm.h>
  40 #include <vm/vm_param.h>
  41 #include <vm/pmap.h>
  42 #include <vm/vm_object.h>
  43 #include <vm/vm_page.h>
  44 #include <vm/vm_map.h>
  45 #include <vm/vm_kern.h>
  46 #include <vm/vm_extern.h>
  47
  48 #include <machine/bus.h>
  49 #include <machine/cpufunc.h>
  50 #include <machine/segments.h>
  51
  52 #include <i386/isa/intr_machdep.h>
  53
  54 #include "acpi.h"
  55
  56 #include <dev/acpica/acpica_support.h>
  57
  58 #include <dev/acpica/acpivar.h>
  59
  60 #include "acpi_wakecode.h"
  61
  62 #if defined(__DragonFly__) || __FreeBSD_version < 500000
  63 #define vm_page_lock_queues()
  64 #define vm_page_unlock_queues()
  65 #endif
  66
  67 extern void initializecpu(void);
  68
  69 static struct region_descriptor r_idt, r_gdt, *p_gdt;
  70 static u_int16_t        r_ldt;
  71
  72 static u_int32_t        r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
  73                         r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
  74
  75 static u_int16_t        r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
  76 static u_int32_t        r_esp = 0;
  77
  78 static void             acpi_printcpu(void);
  79 static void             acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
  80                                           int nsegs, int error);
  81 static void             acpi_alloc_wakeup_handler(void);
  82
  83 /* XXX shut gcc up */
  84 extern int              acpi_savecpu(void);
  85 extern int              acpi_restorecpu(void);
  86
  87 #ifdef __GNUC__
  88 __asm__("                               \n\
  89         .text                           \n\
  90         .p2align 2, 0x90                \n\
  91         .type acpi_restorecpu, @function\n\
  92 acpi_restorecpu:                        \n\
  93         .align 4                        \n\
  94         movl    r_eax,%eax              \n\
  95         movl    r_ebx,%ebx              \n\
  96         movl    r_ecx,%ecx              \n\
  97         movl    r_edx,%edx              \n\
  98         movl    r_ebp,%ebp              \n\
  99         movl    r_esi,%esi              \n\
 100         movl    r_edi,%edi              \n\
 101         movl    r_esp,%esp              \n\
 102                                         \n\
 103         pushl   r_efl                   \n\
 104         popfl                           \n\
 105                                         \n\
 106         movl    ret_addr,%eax           \n\
 107         movl    %eax,(%esp)             \n\
 108         xorl    %eax,%eax               \n\
 109         ret                             \n\
 110                                         \n\
 111         .text                           \n\
 112         .p2align 2, 0x90                \n\
 113         .type acpi_savecpu, @function   \n\
 114 acpi_savecpu:                           \n\
 115         movw    %cs,r_cs                \n\
 116         movw    %ds,r_ds                \n\
 117         movw    %es,r_es                \n\
 118         movw    %fs,r_fs                \n\
 119         movw    %gs,r_gs                \n\
 120         movw    %ss,r_ss                \n\
 121                                         \n\
 122         movl    %eax,r_eax              \n\
 123         movl    %ebx,r_ebx              \n\
 124         movl    %ecx,r_ecx              \n\
 125         movl    %edx,r_edx              \n\
 126         movl    %ebp,r_ebp              \n\
 127         movl    %esi,r_esi              \n\
 128         movl    %edi,r_edi              \n\
 129                                         \n\
 130         movl    %cr0,%eax               \n\
 131         movl    %eax,r_cr0              \n\
 132         movl    %cr2,%eax               \n\
 133         movl    %eax,r_cr2              \n\
 134         movl    %cr3,%eax               \n\
 135         movl    %eax,r_cr3              \n\
 136         movl    %cr4,%eax               \n\
 137         movl    %eax,r_cr4              \n\
 138                                         \n\
 139         pushfl                          \n\
 140         popl    r_efl                   \n\
 141                                         \n\
 142         movl    %esp,r_esp              \n\
 143                                         \n\
 144         sgdt    r_gdt                   \n\
 145         sidt    r_idt                   \n\
 146         sldt    r_ldt                   \n\
 147         str     r_tr                    \n\
 148                                         \n\
 149         movl    (%esp),%eax             \n\
 150         movl    %eax,ret_addr           \n\
 151         movl    $1,%eax                 \n\
 152         ret                             \n\
 153 ");
 154 #endif /* __GNUC__ */
 155
 156 static void
 157 acpi_printcpu(void)
 158 {
 159
 160         printf("======== acpi_printcpu() debug dump ========\n");
 161         printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
 162                 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
 163                 r_ldt, r_tr, r_efl);
 164         printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
 165                 r_eax, r_ebx, r_ecx, r_edx);
 166         printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
 167                 r_esi, r_edi, r_ebp, r_esp);
 168         printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
 169                 r_cr0, r_cr2, r_cr3, r_cr4);
 170         printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
 171                 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
 172 }
 173
 174 #define WAKECODE_FIXUP(offset, type, val) do    {               \
 175         void    **addr;                                         \
 176         addr = (void **)(sc->acpi_wakeaddr + offset);           \
 177         (type *)*addr = val;                                    \
 178 } while (0)
 179
 180 #define WAKECODE_BCOPY(offset, type, val) do    {               \
 181         void    **addr;                                         \
 182         addr = (void **)(sc->acpi_wakeaddr + offset);           \
 183         bcopy(&(val), addr, sizeof(type));                      \
 184 } while (0)
 185
 186 int
 187 acpi_sleep_machdep(struct acpi_softc *sc, int state)
 188 {
 189         ACPI_STATUS             status;
 190         vm_paddr_t              oldphys;
 191         struct pmap             *pm;
 192         vm_page_t               page;
 193         static vm_page_t        opage = NULL;
 194         int                     ret = 0;
 195         int                     pteobj_allocated = 0;
 196         u_long                  ef;
 197         struct proc             *p;
 198
 199         if (sc->acpi_wakeaddr == 0) {
 200                 return (0);
 201         }
 202
 203         AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
 204
 205         ef = read_eflags();
 206         cpu_disable_intr();
 207
 208         /* Create Identity Mapping */
 209         if ((p = curproc) == NULL)
 210                 p = &proc0;
 211         pm = vmspace_pmap(p->p_vmspace);
 212         if (pm->pm_pteobj == NULL) {
 213                 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
 214                 pteobj_allocated = 1;
 215         }
 216
 217         oldphys = pmap_extract(pm, sc->acpi_wakephys);
 218         if (oldphys) {
 219                 opage = PHYS_TO_VM_PAGE(oldphys);
 220         }
 221         page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
 222         pmap_enter(pm, sc->acpi_wakephys, page,
 223                    VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
 224
 225         ret_addr = 0;
 226         if (acpi_savecpu()) {
 227                 /* Execute Sleep */
 228                 p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt);
 229                 p_gdt->rd_limit = r_gdt.rd_limit;
 230                 p_gdt->rd_base = vtophys(r_gdt.rd_base);
 231
 232                 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp));
 233                 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0);
 234                 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2);
 235                 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3);
 236                 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4);
 237
 238                 WAKECODE_FIXUP(previous_tr,  u_int16_t, r_tr);
 239                 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
 240                 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt);
 241                 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
 242
 243                 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu);
 244
 245                 WAKECODE_FIXUP(previous_ds,  u_int16_t, r_ds);
 246                 WAKECODE_FIXUP(previous_es,  u_int16_t, r_es);
 247                 WAKECODE_FIXUP(previous_fs,  u_int16_t, r_fs);
 248                 WAKECODE_FIXUP(previous_gs,  u_int16_t, r_gs);
 249                 WAKECODE_FIXUP(previous_ss,  u_int16_t, r_ss);
 250
 251                 if (acpi_get_verbose(sc)) {
 252                         acpi_printcpu();
 253                 }
 254
 255                 wbinvd();
 256
 257                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) {
 258                         status = AcpiEnterSleepStateS4Bios();
 259                 } else {
 260                         status = AcpiEnterSleepState(state);
 261                 }
 262
 263                 if (status != AE_OK) {
 264                         device_printf(sc->acpi_dev,
 265                                 "AcpiEnterSleepState failed - %s\n",
 266                                 AcpiFormatException(status));
 267                         ret = -1;
 268                         goto out;
 269                 }
 270
 271                 for (;;) ;
 272         } else {
 273                 /* Execute Wakeup */
 274 #if 0
 275                 initializecpu();
 276 #endif
 277                 icu_reinit();
 278
 279                 if (acpi_get_verbose(sc)) {
 280                         acpi_savecpu();
 281                         acpi_printcpu();
 282                 }
 283         }
 284
 285 out:
 286         vm_page_lock_queues();
 287         pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
 288         vm_page_unlock_queues();
 289         if (opage) {
 290                 pmap_enter(pm, sc->acpi_wakephys, page,
 291                            VM_PROT_READ | VM_PROT_WRITE, 0);
 292         }
 293
 294         if (pteobj_allocated) {
 295                 vm_object_deallocate(pm->pm_pteobj);
 296                 pm->pm_pteobj = NULL;
 297         }
 298
 299         write_eflags(ef);
 300
 301         return (ret);
 302 }
 303
 304 static bus_dma_tag_t    acpi_waketag;
 305 static bus_dmamap_t     acpi_wakemap;
 306 static vm_offset_t      acpi_wakeaddr = 0;
 307
 308 static void
 309 acpi_alloc_wakeup_handler(void)
 310 {
 311
 312         if (!cold)
 313                 return;
 314
 315         if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
 316                                /* lowaddr below 1MB */ 0x9ffff,
 317                                /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
 318                                 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
 319                 printf("acpi_alloc_wakeup_handler: unable to create wake tag\n");
 320                 return;
 321         }
 322
 323         if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
 324                              BUS_DMA_NOWAIT, &acpi_wakemap)) {
 325                 printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n");
 326                 return;
 327         }
 328 }
 329
 330 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
 331
 332 static void
 333 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
 334 {
 335         struct acpi_softc       *sc = arg;
 336         u_int32_t               *addr;
 337
 338         addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2];
 339         *addr = segs[0].ds_addr + wakeup_32;
 340         bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
 341         sc->acpi_wakephys = segs[0].ds_addr;
 342 }
 343
 344 void
 345 acpi_install_wakeup_handler(struct acpi_softc *sc)
 346 {
 347
 348         if (acpi_wakeaddr == 0) {
 349                 return;
 350         }
 351
 352         sc->acpi_waketag = acpi_waketag;
 353         sc->acpi_wakeaddr = acpi_wakeaddr;
 354         sc->acpi_wakemap = acpi_wakemap;
 355
 356         bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
 357                         (void *)sc->acpi_wakeaddr, PAGE_SIZE,
 358                         acpi_realmodeinst, sc, 0);
 359 }
 360