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/pmap.h> 41 #include <vm/vm_object.h> 42 #include <vm/vm_page.h> 43 #include <vm/vm_map.h> 44 45 #include <machine/bus.h> 46 #include <machine/cpufunc.h> 47 #include <machine/intr_machdep.h> 48 #include <machine/segments.h> 49 50 #include <contrib/dev/acpica/acpi.h> 51 #include <dev/acpica/acpivar.h> 52 53 #include "acpi_wakecode.h" 54 55 #ifndef _SYS_CDEFS_H_ 56 #error this file needs sys/cdefs.h as a prerequisite 57 #endif 58 59 extern uint32_t acpi_reset_video; 60 extern void initializecpu(void); 61 62 static struct region_descriptor saved_idt, saved_gdt, *p_gdt; 63 static uint16_t saved_ldt; 64 65 static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi, 66 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr; 67 68 static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr; 69 static uint32_t r_esp = 0; 70 71 static void acpi_printcpu(void); 72 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, 73 int nsegs, int error); 74 static void acpi_alloc_wakeup_handler(void); 75 76 /* XXX shut gcc up */ 77 extern int acpi_savecpu(void); 78 extern int acpi_restorecpu(void); 79 80 #ifdef __GNUCLIKE_ASM 81 __asm__(" \n\ 82 .text \n\ 83 .p2align 2, 0x90 \n\ 84 .type acpi_restorecpu, @function\n\ 85 acpi_restorecpu: \n\ 86 .align 4 \n\ 87 movl r_eax,%eax \n\ 88 movl r_ebx,%ebx \n\ 89 movl r_ecx,%ecx \n\ 90 movl r_edx,%edx \n\ 91 movl r_ebp,%ebp \n\ 92 movl r_esi,%esi \n\ 93 movl r_edi,%edi \n\ 94 movl r_esp,%esp \n\ 95 \n\ 96 pushl r_efl \n\ 97 popfl \n\ 98 \n\ 99 movl ret_addr,%eax \n\ 100 movl %eax,(%esp) \n\ 101 xorl %eax,%eax \n\ 102 ret \n\ 103 \n\ 104 .text \n\ 105 .p2align 2, 0x90 \n\ 106 .type acpi_savecpu, @function \n\ 107 acpi_savecpu: \n\ 108 movw %cs,r_cs \n\ 109 movw %ds,r_ds \n\ 110 movw %es,r_es \n\ 111 movw %fs,r_fs \n\ 112 movw %gs,r_gs \n\ 113 movw %ss,r_ss \n\ 114 \n\ 115 movl %eax,r_eax \n\ 116 movl %ebx,r_ebx \n\ 117 movl %ecx,r_ecx \n\ 118 movl %edx,r_edx \n\ 119 movl %ebp,r_ebp \n\ 120 movl %esi,r_esi \n\ 121 movl %edi,r_edi \n\ 122 \n\ 123 movl %cr0,%eax \n\ 124 movl %eax,r_cr0 \n\ 125 movl %cr2,%eax \n\ 126 movl %eax,r_cr2 \n\ 127 movl %cr3,%eax \n\ 128 movl %eax,r_cr3 \n\ 129 movl %cr4,%eax \n\ 130 movl %eax,r_cr4 \n\ 131 \n\ 132 pushfl \n\ 133 popl r_efl \n\ 134 \n\ 135 movl %esp,r_esp \n\ 136 \n\ 137 sgdt saved_gdt \n\ 138 sidt saved_idt \n\ 139 sldt saved_ldt \n\ 140 str r_tr \n\ 141 \n\ 142 movl (%esp),%eax \n\ 143 movl %eax,ret_addr \n\ 144 movl $1,%eax \n\ 145 ret \n\ 146 "); 147 #endif /* __GNUCLIKE_ASM */ 148 149 static void 150 acpi_printcpu(void) 151 { 152 printf("======== acpi_printcpu() debug dump ========\n"); 153 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n", 154 saved_gdt.rd_limit, saved_gdt.rd_base, 155 saved_idt.rd_limit, saved_idt.rd_base, 156 saved_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 type *addr; \ 169 addr = (type *)(sc->acpi_wakeaddr + offset); \ 170 *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 struct pmap *pm; 184 vm_page_t page; 185 int ret; 186 uint32_t cr3; 187 u_long ef; 188 struct proc *p; 189 190 ret = 0; 191 if (sc->acpi_wakeaddr == 0) 192 return (0); 193 194 AcpiSetFirmwareWakingVector(sc->acpi_wakephys); 195 196 ef = read_eflags(); 197 198 /* Create Identity Mapping */ 199 if ((p = curproc) == NULL) 200 p = &proc0; 201 pm = vmspace_pmap(p->p_vmspace); 202 cr3 = rcr3(); 203 #ifdef PAE 204 load_cr3(vtophys(pm->pm_pdpt)); 205 #else 206 load_cr3(vtophys(pm->pm_pdir)); 207 #endif 208 209 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys); 210 pmap_enter(pm, sc->acpi_wakephys, page, 211 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1); 212 213 ret_addr = 0; 214 ACPI_DISABLE_IRQS(); 215 if (acpi_savecpu()) { 216 /* Execute Sleep */ 217 intr_suspend(); 218 219 p_gdt = (struct region_descriptor *) 220 (sc->acpi_wakeaddr + physical_gdt); 221 p_gdt->rd_limit = saved_gdt.rd_limit; 222 p_gdt->rd_base = vtophys(saved_gdt.rd_base); 223 224 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp)); 225 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0); 226 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2); 227 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3); 228 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4); 229 230 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video); 231 232 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr); 233 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, saved_gdt); 234 WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt); 235 WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_idt); 236 237 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu); 238 239 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds); 240 WAKECODE_FIXUP(previous_es, uint16_t, r_es); 241 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs); 242 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs); 243 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss); 244 245 if (bootverbose) 246 acpi_printcpu(); 247 248 /* Call ACPICA to enter the desired sleep state */ 249 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 250 status = AcpiEnterSleepStateS4bios(); 251 else 252 status = AcpiEnterSleepState(state); 253 254 if (status != AE_OK) { 255 device_printf(sc->acpi_dev, 256 "AcpiEnterSleepState failed - %s\n", 257 AcpiFormatException(status)); 258 ret = -1; 259 goto out; 260 } 261 262 for (;;) ; 263 } else { 264 /* Execute Wakeup */ 265 intr_resume(); 266 267 if (bootverbose) { 268 acpi_savecpu(); 269 acpi_printcpu(); 270 } 271 } 272 273 out: 274 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE); 275 load_cr3(cr3); 276 write_eflags(ef); 277 278 return (ret); 279 } 280 281 static bus_dma_tag_t acpi_waketag; 282 static bus_dmamap_t acpi_wakemap; 283 static vm_offset_t acpi_wakeaddr = 0; 284 285 static void 286 acpi_alloc_wakeup_handler(void) 287 { 288 void *wakeaddr; 289 290 if (!cold) 291 return; 292 293 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0, 294 /* lowaddr below 1MB */ 0x9ffff, 295 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL, 296 PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex, 297 &Giant, &acpi_waketag) != 0) { 298 printf("acpi_alloc_wakeup_handler: can't create wake tag\n"); 299 return; 300 } 301 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, 302 BUS_DMA_NOWAIT, &acpi_wakemap)) { 303 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n"); 304 return; 305 } 306 acpi_wakeaddr = (vm_offset_t)wakeaddr; 307 } 308 309 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0) 310 311 static void 312 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 313 { 314 struct acpi_softc *sc = arg; 315 uint32_t *addr; 316 317 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2]; 318 *addr = segs[0].ds_addr + wakeup_32; 319 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 320 sc->acpi_wakephys = segs[0].ds_addr; 321 } 322 323 void 324 acpi_install_wakeup_handler(struct acpi_softc *sc) 325 { 326 if (acpi_wakeaddr == 0) 327 return; 328 329 sc->acpi_waketag = acpi_waketag; 330 sc->acpi_wakeaddr = acpi_wakeaddr; 331 sc->acpi_wakemap = acpi_wakemap; 332 333 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap, 334 (void *)sc->acpi_wakeaddr, PAGE_SIZE, 335 acpi_realmodeinst, sc, 0); 336 } 337