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 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__(" 83 .text 84 .p2align 2, 0x90 85 .type acpi_restorecpu, @function 86 acpi_restorecpu: 87 .align 4 88 movl r_eax,%eax 89 movl r_ebx,%ebx 90 movl r_ecx,%ecx 91 movl r_edx,%edx 92 movl r_ebp,%ebp 93 movl r_esi,%esi 94 movl r_edi,%edi 95 movl r_esp,%esp 96 97 pushl r_efl 98 popfl 99 100 pushl ret_addr 101 xorl %eax,%eax 102 ret 103 104 .text 105 .p2align 2, 0x90 106 .type acpi_savecpu, @function 107 acpi_savecpu: 108 movw %cs,r_cs 109 movw %ds,r_ds 110 movw %es,r_es 111 movw %fs,r_fs 112 movw %gs,r_gs 113 movw %ss,r_ss 114 115 movl %eax,r_eax 116 movl %ebx,r_ebx 117 movl %ecx,r_ecx 118 movl %edx,r_edx 119 movl %ebp,r_ebp 120 movl %esi,r_esi 121 movl %edi,r_edi 122 123 movl %cr0,%eax 124 movl %eax,r_cr0 125 movl %cr2,%eax 126 movl %eax,r_cr2 127 movl %cr3,%eax 128 movl %eax,r_cr3 129 movl %cr4,%eax 130 movl %eax,r_cr4 131 132 pushfl 133 popl r_efl 134 135 movl %esp,r_esp 136 137 sgdt r_gdt 138 sidt r_idt 139 sldt r_ldt 140 str r_tr 141 142 movl (%esp),%eax 143 movl %eax,ret_addr 144 movl $1,%eax 145 ret 146 "); 147 148 static void 149 acpi_printcpu(void) 150 { 151 152 printf("======== acpi_printcpu() debug dump ========\n"); 153 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n", 154 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base, 155 r_ldt, r_tr, r_efl); 156 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n", 157 r_eax, r_ebx, r_ecx, r_edx); 158 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n", 159 r_esi, r_edi, r_ebp, r_esp); 160 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n", 161 r_cr0, r_cr2, r_cr3, r_cr4); 162 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n", 163 r_cs, r_ds, r_es, r_fs, r_gs, r_ss); 164 } 165 166 #define WAKECODE_FIXUP(offset, type, val) do { \ 167 void **addr; \ 168 addr = (void **)(sc->acpi_wakeaddr + offset); \ 169 (type *)*addr = val; \ 170 } while (0) 171 172 #define WAKECODE_BCOPY(offset, type, val) do { \ 173 void **addr; \ 174 addr = (void **)(sc->acpi_wakeaddr + offset); \ 175 bcopy(&(val), addr, sizeof(type)); \ 176 } while (0) 177 178 int 179 acpi_sleep_machdep(struct acpi_softc *sc, int state) 180 { 181 ACPI_STATUS status; 182 vm_offset_t oldphys; 183 struct pmap *pm; 184 vm_page_t page; 185 static vm_page_t opage = NULL; 186 int ret = 0; 187 int pteobj_allocated = 0; 188 u_long ef; 189 190 if (sc->acpi_wakeaddr == NULL) { 191 return (0); 192 } 193 194 AcpiSetFirmwareWakingVector(sc->acpi_wakephys); 195 196 ef = read_eflags(); 197 disable_intr(); 198 199 /* Create Identity Mapping */ 200 pm = vmspace_pmap(CURPROC->p_vmspace); 201 if (pm->pm_pteobj == NULL) { 202 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1); 203 pteobj_allocated = 1; 204 } 205 206 oldphys = pmap_extract(pm, sc->acpi_wakephys); 207 if (oldphys) { 208 opage = PHYS_TO_VM_PAGE(oldphys); 209 } 210 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys); 211 pmap_enter(pm, sc->acpi_wakephys, page, 212 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1); 213 214 ret_addr = 0; 215 if (acpi_savecpu()) { 216 /* Execute Sleep */ 217 p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt); 218 p_gdt->rd_limit = r_gdt.rd_limit; 219 p_gdt->rd_base = vtophys(r_gdt.rd_base); 220 221 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp)); 222 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0); 223 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2); 224 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3); 225 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4); 226 227 WAKECODE_FIXUP(previous_tr, u_int16_t, r_tr); 228 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt); 229 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt); 230 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt); 231 232 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu); 233 234 WAKECODE_FIXUP(previous_ds, u_int16_t, r_ds); 235 WAKECODE_FIXUP(previous_es, u_int16_t, r_es); 236 WAKECODE_FIXUP(previous_fs, u_int16_t, r_fs); 237 WAKECODE_FIXUP(previous_gs, u_int16_t, r_gs); 238 WAKECODE_FIXUP(previous_ss, u_int16_t, r_ss); 239 240 if (acpi_get_verbose(sc)) { 241 acpi_printcpu(); 242 } 243 244 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) { 245 status = AcpiEnterSleepStateS4Bios(); 246 } else { 247 status = AcpiEnterSleepState(state); 248 } 249 250 if (status != AE_OK) { 251 device_printf(sc->acpi_dev, 252 "AcpiEnterSleepState failed - %s\n", 253 AcpiFormatException(status)); 254 ret = -1; 255 goto out; 256 } 257 wbinvd(); 258 259 for (;;) ; 260 } else { 261 /* Execute Wakeup */ 262 #if 0 263 initializecpu(); 264 #endif 265 icu_reinit(); 266 267 if (acpi_get_verbose(sc)) { 268 acpi_savecpu(); 269 acpi_printcpu(); 270 } 271 } 272 273 out: 274 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE); 275 if (opage) { 276 pmap_enter(pm, sc->acpi_wakephys, page, 277 VM_PROT_READ | VM_PROT_WRITE, 0); 278 } 279 280 if (pteobj_allocated) { 281 vm_object_deallocate(pm->pm_pteobj); 282 pm->pm_pteobj = NULL; 283 } 284 285 write_eflags(ef); 286 287 return (ret); 288 } 289 290 static bus_dma_tag_t acpi_waketag; 291 static bus_dmamap_t acpi_wakemap; 292 static vm_offset_t acpi_wakeaddr = 0; 293 294 static void 295 acpi_alloc_wakeup_handler(void) 296 { 297 298 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0, 299 /* lowaddr below 1MB */ 0x9ffff, 300 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL, 301 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) { 302 printf("acpi_alloc_wakeup_handler: unable to create wake tag\n"); 303 return; 304 } 305 306 if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr, 307 BUS_DMA_NOWAIT, &acpi_wakemap)) { 308 printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n"); 309 return; 310 } 311 } 312 313 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0) 314 315 static void 316 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 317 { 318 struct acpi_softc *sc = arg; 319 u_int32_t *addr; 320 321 addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2]; 322 *addr = segs[0].ds_addr + wakeup_32; 323 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 324 sc->acpi_wakephys = segs[0].ds_addr; 325 } 326 327 void 328 acpi_install_wakeup_handler(struct acpi_softc *sc) 329 { 330 331 if (acpi_wakeaddr == 0) { 332 return; 333 } 334 335 sc->acpi_waketag = acpi_waketag; 336 sc->acpi_wakeaddr = acpi_wakeaddr; 337 sc->acpi_wakemap = acpi_wakemap; 338 339 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap, 340 (void *)sc->acpi_wakeaddr, PAGE_SIZE, 341 acpi_realmodeinst, sc, 0); 342 } 343 344