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 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 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 #include <dev/acpica/acpivar.h> 56 57 #include "acpi_wakecode.h" 58 59 #if __FreeBSD_version < 500000 60 #define vm_page_lock_queues() 61 #define vm_page_unlock_queues() 62 #endif 63 64 extern void initializecpu(void); 65 66 static struct region_descriptor r_idt, r_gdt, *p_gdt; 67 static u_int16_t r_ldt; 68 69 static u_int32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi, 70 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr; 71 72 static u_int16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr; 73 static u_int32_t r_esp = 0; 74 75 static void acpi_printcpu(void); 76 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, 77 int nsegs, int error); 78 static void acpi_alloc_wakeup_handler(void); 79 80 /* XXX shut gcc up */ 81 extern int acpi_savecpu(void); 82 extern int acpi_restorecpu(void); 83 84 #ifdef __GNUC__ 85 __asm__(" \n\ 86 .text \n\ 87 .p2align 2, 0x90 \n\ 88 .type acpi_restorecpu, @function\n\ 89 acpi_restorecpu: \n\ 90 .align 4 \n\ 91 movl r_eax,%eax \n\ 92 movl r_ebx,%ebx \n\ 93 movl r_ecx,%ecx \n\ 94 movl r_edx,%edx \n\ 95 movl r_ebp,%ebp \n\ 96 movl r_esi,%esi \n\ 97 movl r_edi,%edi \n\ 98 movl r_esp,%esp \n\ 99 \n\ 100 pushl r_efl \n\ 101 popfl \n\ 102 \n\ 103 movl ret_addr,%eax \n\ 104 movl %eax,(%esp) \n\ 105 xorl %eax,%eax \n\ 106 ret \n\ 107 \n\ 108 .text \n\ 109 .p2align 2, 0x90 \n\ 110 .type acpi_savecpu, @function \n\ 111 acpi_savecpu: \n\ 112 movw %cs,r_cs \n\ 113 movw %ds,r_ds \n\ 114 movw %es,r_es \n\ 115 movw %fs,r_fs \n\ 116 movw %gs,r_gs \n\ 117 movw %ss,r_ss \n\ 118 \n\ 119 movl %eax,r_eax \n\ 120 movl %ebx,r_ebx \n\ 121 movl %ecx,r_ecx \n\ 122 movl %edx,r_edx \n\ 123 movl %ebp,r_ebp \n\ 124 movl %esi,r_esi \n\ 125 movl %edi,r_edi \n\ 126 \n\ 127 movl %cr0,%eax \n\ 128 movl %eax,r_cr0 \n\ 129 movl %cr2,%eax \n\ 130 movl %eax,r_cr2 \n\ 131 movl %cr3,%eax \n\ 132 movl %eax,r_cr3 \n\ 133 movl %cr4,%eax \n\ 134 movl %eax,r_cr4 \n\ 135 \n\ 136 pushfl \n\ 137 popl r_efl \n\ 138 \n\ 139 movl %esp,r_esp \n\ 140 \n\ 141 sgdt r_gdt \n\ 142 sidt r_idt \n\ 143 sldt r_ldt \n\ 144 str r_tr \n\ 145 \n\ 146 movl (%esp),%eax \n\ 147 movl %eax,ret_addr \n\ 148 movl $1,%eax \n\ 149 ret \n\ 150 "); 151 #endif /* __GNUC__ */ 152 153 static void 154 acpi_printcpu(void) 155 { 156 printf("======== acpi_printcpu() debug dump ========\n"); 157 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n", 158 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base, 159 r_ldt, r_tr, r_efl); 160 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n", 161 r_eax, r_ebx, r_ecx, r_edx); 162 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n", 163 r_esi, r_edi, r_ebp, r_esp); 164 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n", 165 r_cr0, r_cr2, r_cr3, r_cr4); 166 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n", 167 r_cs, r_ds, r_es, r_fs, r_gs, r_ss); 168 } 169 170 #define WAKECODE_FIXUP(offset, type, val) do { \ 171 void **addr; \ 172 addr = (void **)(sc->acpi_wakeaddr + offset); \ 173 (type *)*addr = val; \ 174 } while (0) 175 176 #define WAKECODE_BCOPY(offset, type, val) do { \ 177 void **addr; \ 178 addr = (void **)(sc->acpi_wakeaddr + offset); \ 179 bcopy(&(val), addr, sizeof(type)); \ 180 } while (0) 181 182 int 183 acpi_sleep_machdep(struct acpi_softc *sc, int state) 184 { 185 ACPI_STATUS status; 186 vm_paddr_t oldphys; 187 struct pmap *pm; 188 vm_page_t page; 189 static vm_page_t opage = NULL; 190 int ret = 0; 191 int pteobj_allocated = 0; 192 u_int32_t cr3; 193 u_long ef; 194 struct proc *p; 195 196 if (sc->acpi_wakeaddr == 0) 197 return (0); 198 199 AcpiSetFirmwareWakingVector(sc->acpi_wakephys); 200 201 ef = read_eflags(); 202 ACPI_DISABLE_IRQS(); 203 204 /* Create Identity Mapping */ 205 if ((p = curproc) == NULL) 206 p = &proc0; 207 pm = vmspace_pmap(p->p_vmspace); 208 cr3 = rcr3(); 209 #ifdef PAE 210 load_cr3(vtophys(pm->pm_pdpt)); 211 #else 212 load_cr3(vtophys(pm->pm_pdir)); 213 #endif 214 if (pm->pm_pteobj == NULL) { 215 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1); 216 pteobj_allocated = 1; 217 } 218 219 oldphys = pmap_extract(pm, sc->acpi_wakephys); 220 if (oldphys) 221 opage = PHYS_TO_VM_PAGE(oldphys); 222 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys); 223 pmap_enter(pm, sc->acpi_wakephys, page, 224 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1); 225 226 ret_addr = 0; 227 if (acpi_savecpu()) { 228 /* Execute Sleep */ 229 p_gdt = (struct region_descriptor *) 230 (sc->acpi_wakeaddr + physical_gdt); 231 p_gdt->rd_limit = r_gdt.rd_limit; 232 p_gdt->rd_base = vtophys(r_gdt.rd_base); 233 234 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp)); 235 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0); 236 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2); 237 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3); 238 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4); 239 240 WAKECODE_FIXUP(previous_tr, u_int16_t, r_tr); 241 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt); 242 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt); 243 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt); 244 245 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu); 246 247 WAKECODE_FIXUP(previous_ds, u_int16_t, r_ds); 248 WAKECODE_FIXUP(previous_es, u_int16_t, r_es); 249 WAKECODE_FIXUP(previous_fs, u_int16_t, r_fs); 250 WAKECODE_FIXUP(previous_gs, u_int16_t, r_gs); 251 WAKECODE_FIXUP(previous_ss, u_int16_t, r_ss); 252 253 if (acpi_get_verbose(sc)) 254 acpi_printcpu(); 255 256 /* Call ACPICA to enter the desired sleep state */ 257 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 258 status = AcpiEnterSleepStateS4bios(); 259 else 260 status = AcpiEnterSleepState(state); 261 262 if (status != AE_OK) { 263 device_printf(sc->acpi_dev, 264 "AcpiEnterSleepState failed - %s\n", 265 AcpiFormatException(status)); 266 ret = -1; 267 goto out; 268 } 269 270 for (;;) ; 271 } else { 272 /* Execute Wakeup */ 273 #if 0 274 initializecpu(); 275 #endif 276 icu_reinit(); 277 278 if (acpi_get_verbose(sc)) { 279 acpi_savecpu(); 280 acpi_printcpu(); 281 } 282 } 283 284 out: 285 vm_page_lock_queues(); 286 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE); 287 vm_page_unlock_queues(); 288 if (opage) { 289 pmap_enter(pm, sc->acpi_wakephys, page, 290 VM_PROT_READ | VM_PROT_WRITE, 0); 291 } 292 293 if (pteobj_allocated) { 294 vm_object_deallocate(pm->pm_pteobj); 295 pm->pm_pteobj = NULL; 296 } 297 load_cr3(cr3); 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 if (!cold) 312 return; 313 314 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0, 315 /* lowaddr below 1MB */ 0x9ffff, 316 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL, 317 PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex, 318 &Giant, &acpi_waketag) != 0) { 319 printf("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 printf("acpi_alloc_wakeup_handler: can't alloc 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 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 } 358