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 "acpi.h" 51 #include <dev/acpica/acpivar.h> 52 53 #include "acpi_wakecode.h" 54 55 extern uint32_t acpi_reset_video; 56 extern void initializecpu(void); 57 58 static struct region_descriptor r_idt, r_gdt, *p_gdt; 59 static uint16_t r_ldt; 60 61 static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi, 62 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr; 63 64 static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr; 65 static uint32_t r_esp = 0; 66 67 static void acpi_printcpu(void); 68 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, 69 int nsegs, int error); 70 static void acpi_alloc_wakeup_handler(void); 71 72 /* XXX shut gcc up */ 73 extern int acpi_savecpu(void); 74 extern int acpi_restorecpu(void); 75 76 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 77 __asm__(" \n\ 78 .text \n\ 79 .p2align 2, 0x90 \n\ 80 .type acpi_restorecpu, @function\n\ 81 acpi_restorecpu: \n\ 82 .align 4 \n\ 83 movl r_eax,%eax \n\ 84 movl r_ebx,%ebx \n\ 85 movl r_ecx,%ecx \n\ 86 movl r_edx,%edx \n\ 87 movl r_ebp,%ebp \n\ 88 movl r_esi,%esi \n\ 89 movl r_edi,%edi \n\ 90 movl r_esp,%esp \n\ 91 \n\ 92 pushl r_efl \n\ 93 popfl \n\ 94 \n\ 95 movl ret_addr,%eax \n\ 96 movl %eax,(%esp) \n\ 97 xorl %eax,%eax \n\ 98 ret \n\ 99 \n\ 100 .text \n\ 101 .p2align 2, 0x90 \n\ 102 .type acpi_savecpu, @function \n\ 103 acpi_savecpu: \n\ 104 movw %cs,r_cs \n\ 105 movw %ds,r_ds \n\ 106 movw %es,r_es \n\ 107 movw %fs,r_fs \n\ 108 movw %gs,r_gs \n\ 109 movw %ss,r_ss \n\ 110 \n\ 111 movl %eax,r_eax \n\ 112 movl %ebx,r_ebx \n\ 113 movl %ecx,r_ecx \n\ 114 movl %edx,r_edx \n\ 115 movl %ebp,r_ebp \n\ 116 movl %esi,r_esi \n\ 117 movl %edi,r_edi \n\ 118 \n\ 119 movl %cr0,%eax \n\ 120 movl %eax,r_cr0 \n\ 121 movl %cr2,%eax \n\ 122 movl %eax,r_cr2 \n\ 123 movl %cr3,%eax \n\ 124 movl %eax,r_cr3 \n\ 125 movl %cr4,%eax \n\ 126 movl %eax,r_cr4 \n\ 127 \n\ 128 pushfl \n\ 129 popl r_efl \n\ 130 \n\ 131 movl %esp,r_esp \n\ 132 \n\ 133 sgdt r_gdt \n\ 134 sidt r_idt \n\ 135 sldt r_ldt \n\ 136 str r_tr \n\ 137 \n\ 138 movl (%esp),%eax \n\ 139 movl %eax,ret_addr \n\ 140 movl $1,%eax \n\ 141 ret \n\ 142 "); 143 #endif /* __GNUC__ || __INTEL_COMPILER */ 144 145 static void 146 acpi_printcpu(void) 147 { 148 printf("======== acpi_printcpu() debug dump ========\n"); 149 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n", 150 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base, 151 r_ldt, r_tr, r_efl); 152 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n", 153 r_eax, r_ebx, r_ecx, r_edx); 154 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n", 155 r_esi, r_edi, r_ebp, r_esp); 156 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n", 157 r_cr0, r_cr2, r_cr3, r_cr4); 158 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n", 159 r_cs, r_ds, r_es, r_fs, r_gs, r_ss); 160 } 161 162 #define WAKECODE_FIXUP(offset, type, val) do { \ 163 type *addr; \ 164 addr = (type *)(sc->acpi_wakeaddr + offset); \ 165 *addr = val; \ 166 } while (0) 167 168 #define WAKECODE_BCOPY(offset, type, val) do { \ 169 void *addr; \ 170 addr = (void *)(sc->acpi_wakeaddr + offset); \ 171 bcopy(&(val), addr, sizeof(type)); \ 172 } while (0) 173 174 int 175 acpi_sleep_machdep(struct acpi_softc *sc, int state) 176 { 177 ACPI_STATUS status; 178 struct pmap *pm; 179 vm_page_t page; 180 int ret; 181 uint32_t cr3; 182 u_long ef; 183 struct proc *p; 184 185 ret = 0; 186 if (sc->acpi_wakeaddr == 0) 187 return (0); 188 189 AcpiSetFirmwareWakingVector(sc->acpi_wakephys); 190 191 ef = read_eflags(); 192 193 /* Create Identity Mapping */ 194 if ((p = curproc) == NULL) 195 p = &proc0; 196 pm = vmspace_pmap(p->p_vmspace); 197 cr3 = rcr3(); 198 #ifdef PAE 199 load_cr3(vtophys(pm->pm_pdpt)); 200 #else 201 load_cr3(vtophys(pm->pm_pdir)); 202 #endif 203 204 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys); 205 pmap_enter(pm, sc->acpi_wakephys, page, 206 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1); 207 208 ret_addr = 0; 209 ACPI_DISABLE_IRQS(); 210 if (acpi_savecpu()) { 211 /* Execute Sleep */ 212 intr_suspend(); 213 214 p_gdt = (struct region_descriptor *) 215 (sc->acpi_wakeaddr + physical_gdt); 216 p_gdt->rd_limit = r_gdt.rd_limit; 217 p_gdt->rd_base = vtophys(r_gdt.rd_base); 218 219 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp)); 220 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0); 221 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2); 222 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3); 223 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4); 224 225 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video); 226 227 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr); 228 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt); 229 WAKECODE_FIXUP(previous_ldt, uint16_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, uint16_t, r_ds); 235 WAKECODE_FIXUP(previous_es, uint16_t, r_es); 236 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs); 237 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs); 238 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss); 239 240 if (bootverbose) 241 acpi_printcpu(); 242 243 /* Call ACPICA to enter the desired sleep state */ 244 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 245 status = AcpiEnterSleepStateS4bios(); 246 else 247 status = AcpiEnterSleepState(state); 248 249 if (status != AE_OK) { 250 device_printf(sc->acpi_dev, 251 "AcpiEnterSleepState failed - %s\n", 252 AcpiFormatException(status)); 253 ret = -1; 254 goto out; 255 } 256 257 for (;;) ; 258 } else { 259 /* Execute Wakeup */ 260 intr_resume(); 261 262 if (bootverbose) { 263 acpi_savecpu(); 264 acpi_printcpu(); 265 } 266 } 267 268 out: 269 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE); 270 load_cr3(cr3); 271 write_eflags(ef); 272 273 return (ret); 274 } 275 276 static bus_dma_tag_t acpi_waketag; 277 static bus_dmamap_t acpi_wakemap; 278 static vm_offset_t acpi_wakeaddr = 0; 279 280 static void 281 acpi_alloc_wakeup_handler(void) 282 { 283 void *wakeaddr; 284 285 if (!cold) 286 return; 287 288 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0, 289 /* lowaddr below 1MB */ 0x9ffff, 290 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL, 291 PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex, 292 &Giant, &acpi_waketag) != 0) { 293 printf("acpi_alloc_wakeup_handler: can't create wake tag\n"); 294 return; 295 } 296 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, 297 BUS_DMA_NOWAIT, &acpi_wakemap)) { 298 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n"); 299 return; 300 } 301 acpi_wakeaddr = (vm_offset_t)wakeaddr; 302 } 303 304 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0) 305 306 static void 307 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 308 { 309 struct acpi_softc *sc = arg; 310 uint32_t *addr; 311 312 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2]; 313 *addr = segs[0].ds_addr + wakeup_32; 314 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 315 sc->acpi_wakephys = segs[0].ds_addr; 316 } 317 318 void 319 acpi_install_wakeup_handler(struct acpi_softc *sc) 320 { 321 if (acpi_wakeaddr == 0) 322 return; 323 324 sc->acpi_waketag = acpi_waketag; 325 sc->acpi_wakeaddr = acpi_wakeaddr; 326 sc->acpi_wakemap = acpi_wakemap; 327 328 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap, 329 (void *)sc->acpi_wakeaddr, PAGE_SIZE, 330 acpi_realmodeinst, sc, 0); 331 } 332