Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/acpi_wakeup.c
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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: releng/5.0/sys/i386/acpica/acpi_wakeup.c 107618 2002-12-04 18:40:39Z alc $ 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/vm_param.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 #include <vm/vm_kern.h> 45 #include <vm/vm_extern.h> 46 47 #include <machine/bus.h> 48 #include <machine/cpufunc.h> 49 #include <machine/segments.h> 50 51 #include <i386/isa/intr_machdep.h> 52 53 #include "acpi.h" 54 55 #include <dev/acpica/acpica_support.h> 56 57 #include <dev/acpica/acpivar.h> 58 59 #include "acpi_wakecode.h" 60 61 extern void initializecpu(void); 62 63 static struct region_descriptor r_idt, r_gdt, *p_gdt; 64 static u_int16_t r_ldt; 65 66 static u_int32_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 u_int16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr; 70 static u_int32_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 #ifdef __GNUC__ 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__ */ 149 150 static void 151 acpi_printcpu(void) 152 { 153 154 printf("======== acpi_printcpu() debug dump ========\n"); 155 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n", 156 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base, 157 r_ldt, r_tr, r_efl); 158 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n", 159 r_eax, r_ebx, r_ecx, r_edx); 160 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n", 161 r_esi, r_edi, r_ebp, r_esp); 162 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n", 163 r_cr0, r_cr2, r_cr3, r_cr4); 164 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n", 165 r_cs, r_ds, r_es, r_fs, r_gs, r_ss); 166 } 167 168 #define WAKECODE_FIXUP(offset, type, val) do { \ 169 void **addr; \ 170 addr = (void **)(sc->acpi_wakeaddr + offset); \ 171 (type *)*addr = val; \ 172 } while (0) 173 174 #define WAKECODE_BCOPY(offset, type, val) do { \ 175 void **addr; \ 176 addr = (void **)(sc->acpi_wakeaddr + offset); \ 177 bcopy(&(val), addr, sizeof(type)); \ 178 } while (0) 179 180 int 181 acpi_sleep_machdep(struct acpi_softc *sc, int state) 182 { 183 ACPI_STATUS status; 184 vm_offset_t oldphys; 185 struct pmap *pm; 186 vm_page_t page; 187 static vm_page_t opage = NULL; 188 int ret = 0; 189 int pteobj_allocated = 0; 190 u_long ef; 191 struct proc *p; 192 193 if (sc->acpi_wakeaddr == 0) { 194 return (0); 195 } 196 197 AcpiSetFirmwareWakingVector(sc->acpi_wakephys); 198 199 ef = read_eflags(); 200 disable_intr(); 201 202 /* Create Identity Mapping */ 203 if ((p = curproc) == NULL) 204 p = &proc0; 205 pm = vmspace_pmap(p->p_vmspace); 206 if (pm->pm_pteobj == NULL) { 207 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1); 208 pteobj_allocated = 1; 209 } 210 211 oldphys = pmap_extract(pm, sc->acpi_wakephys); 212 if (oldphys) { 213 opage = PHYS_TO_VM_PAGE(oldphys); 214 } 215 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys); 216 pmap_enter(pm, sc->acpi_wakephys, page, 217 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1); 218 219 ret_addr = 0; 220 if (acpi_savecpu()) { 221 /* Execute Sleep */ 222 p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt); 223 p_gdt->rd_limit = r_gdt.rd_limit; 224 p_gdt->rd_base = vtophys(r_gdt.rd_base); 225 226 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp)); 227 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0); 228 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2); 229 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3); 230 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4); 231 232 WAKECODE_FIXUP(previous_tr, u_int16_t, r_tr); 233 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt); 234 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt); 235 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt); 236 237 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu); 238 239 WAKECODE_FIXUP(previous_ds, u_int16_t, r_ds); 240 WAKECODE_FIXUP(previous_es, u_int16_t, r_es); 241 WAKECODE_FIXUP(previous_fs, u_int16_t, r_fs); 242 WAKECODE_FIXUP(previous_gs, u_int16_t, r_gs); 243 WAKECODE_FIXUP(previous_ss, u_int16_t, r_ss); 244 245 if (acpi_get_verbose(sc)) { 246 acpi_printcpu(); 247 } 248 249 wbinvd(); 250 251 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) { 252 status = AcpiEnterSleepStateS4Bios(); 253 } else { 254 status = AcpiEnterSleepState(state); 255 } 256 257 if (status != AE_OK) { 258 device_printf(sc->acpi_dev, 259 "AcpiEnterSleepState failed - %s\n", 260 AcpiFormatException(status)); 261 ret = -1; 262 goto out; 263 } 264 265 for (;;) ; 266 } else { 267 /* Execute Wakeup */ 268 #if 0 269 initializecpu(); 270 #endif 271 icu_reinit(); 272 273 if (acpi_get_verbose(sc)) { 274 acpi_savecpu(); 275 acpi_printcpu(); 276 } 277 } 278 279 out: 280 vm_page_lock_queues(); 281 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE); 282 vm_page_unlock_queues(); 283 if (opage) { 284 pmap_enter(pm, sc->acpi_wakephys, page, 285 VM_PROT_READ | VM_PROT_WRITE, 0); 286 } 287 288 if (pteobj_allocated) { 289 vm_object_deallocate(pm->pm_pteobj); 290 pm->pm_pteobj = NULL; 291 } 292 293 write_eflags(ef); 294 295 return (ret); 296 } 297 298 static bus_dma_tag_t acpi_waketag; 299 static bus_dmamap_t acpi_wakemap; 300 static vm_offset_t acpi_wakeaddr = 0; 301 302 static void 303 acpi_alloc_wakeup_handler(void) 304 { 305 306 if (!cold) 307 return; 308 309 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0, 310 /* lowaddr below 1MB */ 0x9ffff, 311 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL, 312 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) { 313 printf("acpi_alloc_wakeup_handler: unable to create wake tag\n"); 314 return; 315 } 316 317 if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr, 318 BUS_DMA_NOWAIT, &acpi_wakemap)) { 319 printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n"); 320 return; 321 } 322 } 323 324 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0) 325 326 static void 327 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 328 { 329 struct acpi_softc *sc = arg; 330 u_int32_t *addr; 331 332 addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2]; 333 *addr = segs[0].ds_addr + wakeup_32; 334 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 335 sc->acpi_wakephys = segs[0].ds_addr; 336 } 337 338 void 339 acpi_install_wakeup_handler(struct acpi_softc *sc) 340 { 341 342 if (acpi_wakeaddr == 0) { 343 return; 344 } 345 346 sc->acpi_waketag = acpi_waketag; 347 sc->acpi_wakeaddr = acpi_wakeaddr; 348 sc->acpi_wakemap = acpi_wakemap; 349 350 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap, 351 (void *)sc->acpi_wakeaddr, PAGE_SIZE, 352 acpi_realmodeinst, sc, 0); 353 } 354
Cache object: 9ad38fe3aab7bf9cc2e3b7638b284e1c
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