sys/i386/acpica5/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  *
  27  * $FreeBSD: src/sys/i386/acpica/acpi_wakeup.c,v 1.33 2004/05/06 02:18:58 njl Exp $
  28  * $DragonFly: src/sys/i386/acpica5/Attic/acpi_wakeup.c,v 1.9 2005/10/30 04:20:49 y0netan1 Exp $
  29  */
  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/pmap.h>
  41 #include <vm/vm_object.h>
  42 #include <vm/vm_page.h>
  43 #include <vm/vm_map.h>
  44
  45 #include <machine/bus.h>
  46 #include <machine/cpufunc.h>
  47 #include <machine/segments.h>
  48 #include <machine/../isa/intr_machdep.h>
  49
  50 #include "acpi.h"
  51 #include <dev/acpica5/acpivar.h>
  52
  53 #include "acpi_wakecode.h"
  54
  55 #if __FreeBSD_version < 500000
  56 #define vm_page_lock_queues()
  57 #define vm_page_unlock_queues()
  58 #endif
  59
  60 extern uint32_t acpi_reset_video;
  61 extern void     initializecpu(void);
  62
  63 static struct region_descriptor r_idt, r_gdt, *p_gdt;
  64 static uint16_t         r_ldt;
  65
  66 static uint32_t         r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
  67                         r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
  68
  69 static uint16_t         r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
  70 static uint32_t         r_esp = 0;
  71
  72 static void             acpi_printcpu(void);
  73 static void             acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
  74                                           int nsegs, int error);
  75 static void             acpi_alloc_wakeup_handler(void);
  76
  77 /* XXX shut gcc up */
  78 extern int              acpi_savecpu(void);
  79 extern int              acpi_restorecpu(void);
  80
  81 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
  82 __asm__("                               \n\
  83         .text                           \n\
  84         .p2align 2, 0x90                \n\
  85         .type acpi_restorecpu, @function\n\
  86 acpi_restorecpu:                        \n\
  87         .align 4                        \n\
  88         movl    r_eax,%eax              \n\
  89         movl    r_ebx,%ebx              \n\
  90         movl    r_ecx,%ecx              \n\
  91         movl    r_edx,%edx              \n\
  92         movl    r_ebp,%ebp              \n\
  93         movl    r_esi,%esi              \n\
  94         movl    r_edi,%edi              \n\
  95         movl    r_esp,%esp              \n\
  96                                         \n\
  97         pushl   r_efl                   \n\
  98         popfl                           \n\
  99                                         \n\
 100         movl    ret_addr,%eax           \n\
 101         movl    %eax,(%esp)             \n\
 102         xorl    %eax,%eax               \n\
 103         ret                             \n\
 104                                         \n\
 105         .text                           \n\
 106         .p2align 2, 0x90                \n\
 107         .type acpi_savecpu, @function   \n\
 108 acpi_savecpu:                           \n\
 109         movw    %cs,r_cs                \n\
 110         movw    %ds,r_ds                \n\
 111         movw    %es,r_es                \n\
 112         movw    %fs,r_fs                \n\
 113         movw    %gs,r_gs                \n\
 114         movw    %ss,r_ss                \n\
 115                                         \n\
 116         movl    %eax,r_eax              \n\
 117         movl    %ebx,r_ebx              \n\
 118         movl    %ecx,r_ecx              \n\
 119         movl    %edx,r_edx              \n\
 120         movl    %ebp,r_ebp              \n\
 121         movl    %esi,r_esi              \n\
 122         movl    %edi,r_edi              \n\
 123                                         \n\
 124         movl    %cr0,%eax               \n\
 125         movl    %eax,r_cr0              \n\
 126         movl    %cr2,%eax               \n\
 127         movl    %eax,r_cr2              \n\
 128         movl    %cr3,%eax               \n\
 129         movl    %eax,r_cr3              \n\
 130         movl    %cr4,%eax               \n\
 131         movl    %eax,r_cr4              \n\
 132                                         \n\
 133         pushfl                          \n\
 134         popl    r_efl                   \n\
 135                                         \n\
 136         movl    %esp,r_esp              \n\
 137                                         \n\
 138         sgdt    r_gdt                   \n\
 139         sidt    r_idt                   \n\
 140         sldt    r_ldt                   \n\
 141         str     r_tr                    \n\
 142                                         \n\
 143         movl    (%esp),%eax             \n\
 144         movl    %eax,ret_addr           \n\
 145         movl    $1,%eax                 \n\
 146         ret                             \n\
 147 ");
 148 #endif /* __GNUC__ || __INTEL_COMPILER */
 149
 150 static void
 151 acpi_printcpu(void)
 152 {
 153         printf("======== acpi_printcpu() debug dump ========\n");
 154         printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
 155                 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
 156                 r_ldt, r_tr, r_efl);
 157         printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
 158                 r_eax, r_ebx, r_ecx, r_edx);
 159         printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
 160                 r_esi, r_edi, r_ebp, r_esp);
 161         printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
 162                 r_cr0, r_cr2, r_cr3, r_cr4);
 163         printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
 164                 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
 165 }
 166
 167 #define WAKECODE_FIXUP(offset, type, val) do    {               \
 168         type    *addr;                                          \
 169         addr = (type *)(sc->acpi_wakeaddr + offset);            \
 170         *addr = val;                                            \
 171 } while (0)
 172
 173 #define WAKECODE_BCOPY(offset, type, val) do    {               \
 174         void    *addr;                                          \
 175         addr = (void *)(sc->acpi_wakeaddr + offset);            \
 176         bcopy(&(val), addr, sizeof(type));                      \
 177 } while (0)
 178
 179 int
 180 acpi_sleep_machdep(struct acpi_softc *sc, int state)
 181 {
 182         ACPI_STATUS             status;
 183         vm_paddr_t              oldphys;
 184         struct pmap             *pm;
 185         vm_page_t               page;
 186         static vm_page_t        opage = NULL;
 187         int                     ret = 0;
 188         int                     pteobj_allocated = 0;
 189         uint32_t                cr3;
 190         u_long                  ef;
 191         struct proc             *p;
 192
 193         if (sc->acpi_wakeaddr == 0)
 194                 return (0);
 195
 196         AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
 197
 198         ef = read_eflags();
 199         ACPI_DISABLE_IRQS();
 200
 201         /* Create Identity Mapping */
 202         if ((p = curproc) == NULL)
 203                 p = &proc0;
 204         pm = vmspace_pmap(p->p_vmspace);
 205         cr3 = rcr3();
 206 #ifdef PAE
 207         load_cr3(vtophys(pm->pm_pdpt));
 208 #else
 209         load_cr3(vtophys(pm->pm_pdir));
 210 #endif
 211         /*
 212          * note: DragonFly still uses the VM object (FreeBSD-5 no longer uses
 213          * the VM object).
 214          */
 215         if (pm->pm_pteobj == NULL) {
 216                 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
 217                 pteobj_allocated = 1;
 218         }
 219
 220         oldphys = pmap_extract(pm, sc->acpi_wakephys);
 221         if (oldphys)
 222                 opage = PHYS_TO_VM_PAGE(oldphys);
 223         page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
 224         pmap_enter(pm, sc->acpi_wakephys, page,
 225                    VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
 226
 227         ret_addr = 0;
 228         if (acpi_savecpu()) {
 229                 /* Execute Sleep */
 230                 cpu_disable_intr();
 231
 232                 p_gdt = (struct region_descriptor *)
 233                                 (sc->acpi_wakeaddr + physical_gdt);
 234                 p_gdt->rd_limit = r_gdt.rd_limit;
 235                 p_gdt->rd_base = vtophys(r_gdt.rd_base);
 236
 237                 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
 238                 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
 239                 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
 240                 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
 241                 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
 242
 243                 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
 244
 245                 WAKECODE_FIXUP(previous_tr,  uint16_t, r_tr);
 246                 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
 247                 WAKECODE_FIXUP(previous_ldt, uint16_t, r_ldt);
 248                 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
 249
 250                 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
 251
 252                 WAKECODE_FIXUP(previous_ds,  uint16_t, r_ds);
 253                 WAKECODE_FIXUP(previous_es,  uint16_t, r_es);
 254                 WAKECODE_FIXUP(previous_fs,  uint16_t, r_fs);
 255                 WAKECODE_FIXUP(previous_gs,  uint16_t, r_gs);
 256                 WAKECODE_FIXUP(previous_ss,  uint16_t, r_ss);
 257
 258                 if (bootverbose)
 259                         acpi_printcpu();
 260
 261                 /* Call ACPICA to enter the desired sleep state */
 262                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
 263                         status = AcpiEnterSleepStateS4bios();
 264                 else
 265                         status = AcpiEnterSleepState(state);
 266
 267                 if (status != AE_OK) {
 268                         device_printf(sc->acpi_dev,
 269                                 "AcpiEnterSleepState failed - %s\n",
 270                                 AcpiFormatException(status));
 271                         ret = -1;
 272                         goto out;
 273                 }
 274
 275                 for (;;) ;
 276         } else {
 277                 /* Execute Wakeup */
 278 #if 0
 279                 initializecpu();
 280 #endif
 281                 icu_reinit();
 282                 cpu_enable_intr();
 283
 284                 if (bootverbose) {
 285                         acpi_savecpu();
 286                         acpi_printcpu();
 287                 }
 288         }
 289
 290 out:
 291         vm_page_lock_queues();
 292         pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
 293         vm_page_unlock_queues();
 294         if (opage) {
 295                 pmap_enter(pm, sc->acpi_wakephys, page,
 296                            VM_PROT_READ | VM_PROT_WRITE, 0);
 297         }
 298
 299         if (pteobj_allocated) {
 300                 vm_object_deallocate(pm->pm_pteobj);
 301                 pm->pm_pteobj = NULL;
 302         }
 303         load_cr3(cr3);
 304
 305         write_eflags(ef);
 306
 307         return (ret);
 308 }
 309
 310 static bus_dma_tag_t    acpi_waketag;
 311 static bus_dmamap_t     acpi_wakemap;
 312 static vm_offset_t      acpi_wakeaddr = 0;
 313
 314 static void
 315 acpi_alloc_wakeup_handler(void)
 316 {
 317         if (!cold)
 318                 return;
 319
 320         if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
 321                                /* lowaddr below 1MB */ 0x9ffff,
 322                                /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
 323                                 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
 324                 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
 325                 return;
 326         }
 327
 328         if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
 329                              BUS_DMA_NOWAIT, &acpi_wakemap)) {
 330                 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
 331                 return;
 332         }
 333 }
 334
 335 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
 336
 337 static void
 338 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
 339 {
 340         struct acpi_softc       *sc = arg;
 341         uint32_t                *addr;
 342
 343         addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
 344         *addr = segs[0].ds_addr + wakeup_32;
 345         bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
 346         sc->acpi_wakephys = segs[0].ds_addr;
 347 }
 348
 349 void
 350 acpi_install_wakeup_handler(struct acpi_softc *sc)
 351 {
 352         if (acpi_wakeaddr == 0)
 353                 return;
 354
 355         sc->acpi_waketag = acpi_waketag;
 356         sc->acpi_wakeaddr = acpi_wakeaddr;
 357         sc->acpi_wakemap = acpi_wakemap;
 358
 359         bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
 360                         (void *)sc->acpi_wakeaddr, PAGE_SIZE,
 361                         acpi_realmodeinst, sc, 0);
 362 }