sys/platform/pc32/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  *
  27  * $FreeBSD: src/sys/i386/acpica/acpi_wakeup.c,v 1.33 2004/05/06 02:18:58 njl Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/bus.h>
  34 #include <sys/lock.h>
  35 #include <sys/proc.h>
  36 #include <sys/sysctl.h>
  37
  38 #include <vm/vm.h>
  39 #include <vm/pmap.h>
  40 #include <vm/vm_object.h>
  41 #include <vm/vm_page.h>
  42 #include <vm/vm_map.h>
  43
  44 #include <machine/cpufunc.h>
  45 #include <machine/segments.h>
  46 #include <machine_base/icu/icu_var.h>
  47
  48 #include "acpi.h"
  49 #include <dev/acpica/acpivar.h>
  50
  51 #include "acpi_wakecode.h"
  52
  53 extern uint32_t acpi_reset_video;
  54 extern void     initializecpu(void);
  55
  56 static __attribute__((used)) struct region_descriptor   r_idt, r_gdt, *p_gdt;
  57 static __attribute__((used)) uint16_t   r_ldt;
  58
  59 static __attribute__((used)) uint32_t   r_eax, r_ebx, r_ecx, r_edx, r_ebp,
  60                                         r_esi, r_edi, r_efl, r_cr0, r_cr2,
  61                                         r_cr3, r_cr4, ret_addr;
  62
  63 static __attribute__((used)) uint16_t   r_cs, r_ds, r_es, r_fs, r_gs, r_ss,
  64                                         r_tr;
  65 static __attribute__((used)) uint32_t   r_esp;
  66
  67 static void             acpi_printcpu(void);
  68 static void             acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
  69                                           int nsegs, int error);
  70 static void             acpi_alloc_wakeup_handler(void);
  71
  72 /* XXX shut gcc up */
  73 extern int              acpi_savecpu(void);
  74 extern int              acpi_restorecpu(void);
  75
  76 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
  77 __asm__("                               \n\
  78         .text                           \n\
  79         .p2align 2, 0x90                \n\
  80         .type acpi_restorecpu, @function\n\
  81 acpi_restorecpu:                        \n\
  82         .align 4                        \n\
  83         movl    r_eax,%eax              \n\
  84         movl    r_ebx,%ebx              \n\
  85         movl    r_ecx,%ecx              \n\
  86         movl    r_edx,%edx              \n\
  87         movl    r_ebp,%ebp              \n\
  88         movl    r_esi,%esi              \n\
  89         movl    r_edi,%edi              \n\
  90         movl    r_esp,%esp              \n\
  91                                         \n\
  92         pushl   r_efl                   \n\
  93         popfl                           \n\
  94                                         \n\
  95         movl    ret_addr,%eax           \n\
  96         movl    %eax,(%esp)             \n\
  97         xorl    %eax,%eax               \n\
  98         ret                             \n\
  99                                         \n\
 100         .text                           \n\
 101         .p2align 2, 0x90                \n\
 102         .type acpi_savecpu, @function   \n\
 103 acpi_savecpu:                           \n\
 104         movw    %cs,r_cs                \n\
 105         movw    %ds,r_ds                \n\
 106         movw    %es,r_es                \n\
 107         movw    %fs,r_fs                \n\
 108         movw    %gs,r_gs                \n\
 109         movw    %ss,r_ss                \n\
 110                                         \n\
 111         movl    %eax,r_eax              \n\
 112         movl    %ebx,r_ebx              \n\
 113         movl    %ecx,r_ecx              \n\
 114         movl    %edx,r_edx              \n\
 115         movl    %ebp,r_ebp              \n\
 116         movl    %esi,r_esi              \n\
 117         movl    %edi,r_edi              \n\
 118                                         \n\
 119         movl    %cr0,%eax               \n\
 120         movl    %eax,r_cr0              \n\
 121         movl    %cr2,%eax               \n\
 122         movl    %eax,r_cr2              \n\
 123         movl    %cr3,%eax               \n\
 124         movl    %eax,r_cr3              \n\
 125         movl    %cr4,%eax               \n\
 126         movl    %eax,r_cr4              \n\
 127                                         \n\
 128         pushfl                          \n\
 129         popl    r_efl                   \n\
 130                                         \n\
 131         movl    %esp,r_esp              \n\
 132                                         \n\
 133         sgdt    r_gdt                   \n\
 134         sidt    r_idt                   \n\
 135         sldt    r_ldt                   \n\
 136         str     r_tr                    \n\
 137                                         \n\
 138         movl    (%esp),%eax             \n\
 139         movl    %eax,ret_addr           \n\
 140         movl    $1,%eax                 \n\
 141         ret                             \n\
 142 ");
 143 #endif /* __GNUC__ || __INTEL_COMPILER */
 144
 145 static void
 146 acpi_printcpu(void)
 147 {
 148         kprintf("======== acpi_printcpu() debug dump ========\n");
 149         kprintf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
 150                 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
 151                 r_ldt, r_tr, r_efl);
 152         kprintf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
 153                 r_eax, r_ebx, r_ecx, r_edx);
 154         kprintf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
 155                 r_esi, r_edi, r_ebp, r_esp);
 156         kprintf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
 157                 r_cr0, r_cr2, r_cr3, r_cr4);
 158         kprintf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
 159                 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
 160 }
 161
 162 #define WAKECODE_FIXUP(offset, type, val) do    {               \
 163         type    *addr;                                          \
 164         addr = (type *)(sc->acpi_wakeaddr + offset);            \
 165         *addr = val;                                            \
 166 } while (0)
 167
 168 #define WAKECODE_BCOPY(offset, type, val) do    {               \
 169         void    *addr;                                          \
 170         addr = (void *)(sc->acpi_wakeaddr + offset);            \
 171         bcopy(&(val), addr, sizeof(type));                      \
 172 } while (0)
 173
 174 int
 175 acpi_sleep_machdep(struct acpi_softc *sc, int state)
 176 {
 177         ACPI_STATUS             status;
 178         vm_paddr_t              oldphys;
 179         struct pmap             *pm;
 180         vm_page_t               page;
 181         static vm_page_t        opage = NULL;
 182         int                     ret = 0;
 183         int                     pteobj_allocated = 0;
 184         uint32_t                cr3;
 185         u_long                  ef;
 186         struct proc             *p;
 187
 188         if (sc->acpi_wakeaddr == 0)
 189                 return (0);
 190
 191         AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
 192
 193         ef = read_eflags();
 194         ACPI_DISABLE_IRQS();
 195
 196         /* Create Identity Mapping */
 197         if ((p = curproc) == NULL)
 198                 p = &proc0;
 199         pm = vmspace_pmap(p->p_vmspace);
 200         cr3 = rcr3();
 201 #ifdef PAE
 202         load_cr3(vtophys(pm->pm_pdpt));
 203 #else
 204         load_cr3(vtophys(pm->pm_pdir));
 205 #endif
 206         /*
 207          * note: DragonFly still uses the VM object (FreeBSD-5 no longer uses
 208          * the VM object).
 209          */
 210         if (pm->pm_pteobj == NULL) {
 211                 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
 212                 pteobj_allocated = 1;
 213         }
 214
 215         oldphys = pmap_extract(pm, sc->acpi_wakephys);
 216         if (oldphys)
 217                 opage = PHYS_TO_VM_PAGE(oldphys);
 218         page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
 219         pmap_enter(pm, sc->acpi_wakephys, page,
 220                    VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE,
 221                    1, NULL);
 222
 223         ret_addr = 0;
 224         if (acpi_savecpu()) {
 225                 /* Execute Sleep */
 226                 cpu_disable_intr();
 227
 228                 p_gdt = (struct region_descriptor *)
 229                                 (sc->acpi_wakeaddr + physical_gdt);
 230                 p_gdt->rd_limit = r_gdt.rd_limit;
 231                 p_gdt->rd_base = vtophys(r_gdt.rd_base);
 232
 233                 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
 234                 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
 235                 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
 236                 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
 237                 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
 238
 239                 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
 240
 241                 WAKECODE_FIXUP(previous_tr,  uint16_t, r_tr);
 242                 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
 243                 WAKECODE_FIXUP(previous_ldt, uint16_t, r_ldt);
 244                 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
 245
 246                 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
 247
 248                 WAKECODE_FIXUP(previous_ds,  uint16_t, r_ds);
 249                 WAKECODE_FIXUP(previous_es,  uint16_t, r_es);
 250                 WAKECODE_FIXUP(previous_fs,  uint16_t, r_fs);
 251                 WAKECODE_FIXUP(previous_gs,  uint16_t, r_gs);
 252                 WAKECODE_FIXUP(previous_ss,  uint16_t, r_ss);
 253
 254                 if (bootverbose)
 255                         acpi_printcpu();
 256
 257                 /* Call ACPICA to enter the desired sleep state */
 258                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
 259                         status = AcpiEnterSleepStateS4bios();
 260                 else
 261                         status = AcpiEnterSleepState(state);
 262
 263                 if (ACPI_FAILURE(status)) {
 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                 cpu_enable_intr();
 279
 280                 if (bootverbose) {
 281                         acpi_savecpu();
 282                         acpi_printcpu();
 283                 }
 284         }
 285
 286 out:
 287         pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
 288         if (opage) {
 289                 pmap_enter(pm, sc->acpi_wakephys, page,
 290                            VM_PROT_READ | VM_PROT_WRITE,
 291                            0, NULL);
 292         }
 293
 294         if (pteobj_allocated) {
 295                 vm_object_deallocate(pm->pm_pteobj);
 296                 pm->pm_pteobj = NULL;
 297         }
 298         load_cr3(cr3);
 299
 300         write_eflags(ef);
 301
 302         return (ret);
 303 }
 304
 305 static bus_dma_tag_t    acpi_waketag;
 306 static bus_dmamap_t     acpi_wakemap;
 307 static vm_offset_t      acpi_wakeaddr = 0;
 308
 309 static void
 310 acpi_alloc_wakeup_handler(void)
 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                 kprintf("acpi_alloc_wakeup_handler: can't 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                 kprintf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
 326                 return;
 327         }
 328 }
 329
 330 SYSINIT(acpiwakeup, SI_BOOT1_POST, 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         uint32_t                *addr;
 337
 338         addr = (uint32_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         if (acpi_wakeaddr == 0)
 348                 return;
 349
 350         sc->acpi_waketag = acpi_waketag;
 351         sc->acpi_wakeaddr = acpi_wakeaddr;
 352         sc->acpi_wakemap = acpi_wakemap;
 353
 354         bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
 355                         (void *)sc->acpi_wakeaddr, PAGE_SIZE,
 356                         acpi_realmodeinst, sc, 0);
 357 }