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 * $FreeBSD$ 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/mutex.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 extern void initializecpu(void); 63 64 static struct region_descriptor r_idt, r_gdt, *p_gdt; 65 static u_int16_t r_ldt; 66 67 static u_int32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi, 68 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr; 69 70 static u_int16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr; 71 static u_int32_t r_esp = 0; 72 73 static void acpi_printcpu(void); 74 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, 75 int nsegs, int error); 76 static void acpi_alloc_wakeup_handler(void); 77 78 /* XXX shut gcc up */ 79 extern int acpi_savecpu(void); 80 extern int acpi_restorecpu(void); 81 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 "); 148 149 static void 150 acpi_printcpu(void) 151 { 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 void **addr; \ 169 addr = (void **)(sc->acpi_wakeaddr + offset); \ 170 (type *)*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_offset_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 u_long ef; 190 191 if (sc->acpi_wakeaddr == NULL) { 192 return (0); 193 } 194 195 AcpiSetFirmwareWakingVector(sc->acpi_wakephys); 196 197 ef = read_eflags(); 198 disable_intr(); 199 200 /* Create Identity Mapping */ 201 pm = vmspace_pmap(CURPROC->p_vmspace); 202 if (pm->pm_pteobj == NULL) { 203 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1); 204 pteobj_allocated = 1; 205 } 206 207 oldphys = pmap_extract(pm, sc->acpi_wakephys); 208 if (oldphys) { 209 opage = PHYS_TO_VM_PAGE(oldphys); 210 } 211 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys); 212 pmap_enter(pm, sc->acpi_wakephys, page, 213 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1); 214 215 ret_addr = 0; 216 if (acpi_savecpu()) { 217 /* Execute Sleep */ 218 p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt); 219 p_gdt->rd_limit = r_gdt.rd_limit; 220 p_gdt->rd_base = vtophys(r_gdt.rd_base); 221 222 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp)); 223 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0); 224 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2); 225 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3); 226 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4); 227 228 WAKECODE_FIXUP(previous_tr, u_int16_t, r_tr); 229 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt); 230 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt); 231 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt); 232 233 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu); 234 235 WAKECODE_FIXUP(previous_ds, u_int16_t, r_ds); 236 WAKECODE_FIXUP(previous_es, u_int16_t, r_es); 237 WAKECODE_FIXUP(previous_fs, u_int16_t, r_fs); 238 WAKECODE_FIXUP(previous_gs, u_int16_t, r_gs); 239 WAKECODE_FIXUP(previous_ss, u_int16_t, r_ss); 240 241 if (acpi_get_verbose(sc)) { 242 acpi_printcpu(); 243 } 244 245 wbinvd(); 246 247 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) { 248 status = AcpiEnterSleepStateS4Bios(); 249 } else { 250 status = AcpiEnterSleepState(state); 251 } 252 253 if (status != AE_OK) { 254 device_printf(sc->acpi_dev, 255 "AcpiEnterSleepState failed - %s\n", 256 AcpiFormatException(status)); 257 ret = -1; 258 goto out; 259 } 260 261 for (;;) ; 262 } else { 263 /* Execute Wakeup */ 264 #if 0 265 initializecpu(); 266 #endif 267 icu_reinit(); 268 269 if (acpi_get_verbose(sc)) { 270 acpi_savecpu(); 271 acpi_printcpu(); 272 } 273 } 274 275 out: 276 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE); 277 if (opage) { 278 pmap_enter(pm, sc->acpi_wakephys, page, 279 VM_PROT_READ | VM_PROT_WRITE, 0); 280 } 281 282 if (pteobj_allocated) { 283 vm_object_deallocate(pm->pm_pteobj); 284 pm->pm_pteobj = NULL; 285 } 286 287 write_eflags(ef); 288 289 return (ret); 290 } 291 292 static bus_dma_tag_t acpi_waketag; 293 static bus_dmamap_t acpi_wakemap; 294 static vm_offset_t acpi_wakeaddr = 0; 295 296 static void 297 acpi_alloc_wakeup_handler(void) 298 { 299 300 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0, 301 /* lowaddr below 1MB */ 0x9ffff, 302 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL, 303 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) { 304 printf("acpi_alloc_wakeup_handler: unable to create wake tag\n"); 305 return; 306 } 307 308 if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr, 309 BUS_DMA_NOWAIT, &acpi_wakemap)) { 310 printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n"); 311 return; 312 } 313 } 314 315 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0) 316 317 static void 318 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 319 { 320 struct acpi_softc *sc = arg; 321 u_int32_t *addr; 322 323 addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2]; 324 *addr = segs[0].ds_addr + wakeup_32; 325 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 326 sc->acpi_wakephys = segs[0].ds_addr; 327 } 328 329 void 330 acpi_install_wakeup_handler(struct acpi_softc *sc) 331 { 332 333 if (acpi_wakeaddr == 0) { 334 return; 335 } 336 337 sc->acpi_waketag = acpi_waketag; 338 sc->acpi_wakeaddr = acpi_wakeaddr; 339 sc->acpi_wakemap = acpi_wakemap; 340 341 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap, 342 (void *)sc->acpi_wakeaddr, PAGE_SIZE, 343 acpi_realmodeinst, sc, 0); 344 } 345 346