1 /*-
2 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2003 Peter Wemm
5 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/eventhandler.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/memrange.h>
39 #include <sys/smp.h>
40
41 #include <vm/vm.h>
42 #include <vm/pmap.h>
43
44 #include <machine/clock.h>
45 #include <machine/intr_machdep.h>
46 #include <x86/mca.h>
47 #include <machine/pcb.h>
48 #include <machine/pmap.h>
49 #include <machine/specialreg.h>
50 #include <machine/md_var.h>
51
52 #ifdef SMP
53 #include <x86/apicreg.h>
54 #include <machine/smp.h>
55 #include <machine/vmparam.h>
56 #endif
57
58 #include <contrib/dev/acpica/include/acpi.h>
59
60 #include <dev/acpica/acpivar.h>
61
62 #include "acpi_wakecode.h"
63 #include "acpi_wakedata.h"
64
65 /* Make sure the code is less than a page and leave room for the stack. */
66 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
67
68 extern int acpi_resume_beep;
69 extern int acpi_reset_video;
70
71 #ifdef SMP
72 extern struct pcb **susppcbs;
73 #else
74 static struct pcb **susppcbs;
75 #endif
76
77 #ifdef SMP
78 static cpuset_t suspcpus;
79 #endif
80
81 static void *acpi_alloc_wakeup_handler(void);
82 static void acpi_stop_beep(void *);
83
84 #ifdef SMP
85 static int acpi_wakeup_ap(struct acpi_softc *, int);
86 static void acpi_wakeup_cpus(struct acpi_softc *, const cpuset_t *);
87 #endif
88
89 #define ACPI_PAGETABLES 0
90 #define WAKECODE_VADDR(sc) ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE))
91 #define WAKECODE_PADDR(sc) ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE))
92 #define WAKECODE_FIXUP(offset, type, val) do { \
93 type *addr; \
94 addr = (type *)(WAKECODE_VADDR(sc) + offset); \
95 *addr = val; \
96 } while (0)
97
98 static void
99 acpi_stop_beep(void *arg)
100 {
101
102 if (acpi_resume_beep != 0)
103 timer_spkr_release();
104 }
105
106 #ifdef SMP
107 static int
108 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
109 {
110 int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
111 int apic_id = cpu_apic_ids[cpu];
112 int ms;
113
114 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]);
115
116 /* do an INIT IPI: assert RESET */
117 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
118 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id);
119
120 /* wait for pending status end */
121 lapic_ipi_wait(-1);
122
123 /* do an INIT IPI: deassert RESET */
124 lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL |
125 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0);
126
127 /* wait for pending status end */
128 DELAY(10000); /* wait ~10mS */
129 lapic_ipi_wait(-1);
130
131 /*
132 * next we do a STARTUP IPI: the previous INIT IPI might still be
133 * latched, (P5 bug) this 1st STARTUP would then terminate
134 * immediately, and the previously started INIT IPI would continue. OR
135 * the previous INIT IPI has already run. and this STARTUP IPI will
136 * run. OR the previous INIT IPI was ignored. and this STARTUP IPI
137 * will run.
138 */
139
140 /* do a STARTUP IPI */
141 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
142 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
143 vector, apic_id);
144 lapic_ipi_wait(-1);
145 DELAY(200); /* wait ~200uS */
146
147 /*
148 * finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
149 * the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
150 * this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
151 * recognized after hardware RESET or INIT IPI.
152 */
153
154 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
155 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
156 vector, apic_id);
157 lapic_ipi_wait(-1);
158 DELAY(200); /* wait ~200uS */
159
160 /* Wait up to 5 seconds for it to start. */
161 for (ms = 0; ms < 5000; ms++) {
162 if (susppcbs[cpu]->pcb_eip == 0)
163 return (1); /* return SUCCESS */
164 DELAY(1000);
165 }
166 return (0); /* return FAILURE */
167 }
168
169 #define WARMBOOT_TARGET 0
170 #define WARMBOOT_OFF (KERNBASE + 0x0467)
171 #define WARMBOOT_SEG (KERNBASE + 0x0469)
172
173 #define CMOS_REG (0x70)
174 #define CMOS_DATA (0x71)
175 #define BIOS_RESET (0x0f)
176 #define BIOS_WARM (0x0a)
177
178 static void
179 acpi_wakeup_cpus(struct acpi_softc *sc, const cpuset_t *wakeup_cpus)
180 {
181 uint32_t mpbioswarmvec;
182 int cpu;
183 u_char mpbiosreason;
184
185 /* save the current value of the warm-start vector */
186 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
187 outb(CMOS_REG, BIOS_RESET);
188 mpbiosreason = inb(CMOS_DATA);
189
190 /* setup a vector to our boot code */
191 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
192 *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4;
193 outb(CMOS_REG, BIOS_RESET);
194 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
195
196 /* Wake up each AP. */
197 for (cpu = 1; cpu < mp_ncpus; cpu++) {
198 if (!CPU_ISSET(cpu, wakeup_cpus))
199 continue;
200 if (acpi_wakeup_ap(sc, cpu) == 0) {
201 /* restore the warmstart vector */
202 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
203 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
204 cpu, cpu_apic_ids[cpu]);
205 }
206 }
207
208 /* restore the warmstart vector */
209 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
210
211 outb(CMOS_REG, BIOS_RESET);
212 outb(CMOS_DATA, mpbiosreason);
213 }
214 #endif
215
216 int
217 acpi_sleep_machdep(struct acpi_softc *sc, int state)
218 {
219 ACPI_STATUS status;
220
221 if (sc->acpi_wakeaddr == 0ul)
222 return (-1); /* couldn't alloc wake memory */
223
224 #ifdef SMP
225 suspcpus = all_cpus;
226 CPU_CLR(PCPU_GET(cpuid), &suspcpus);
227 #endif
228
229 if (acpi_resume_beep != 0)
230 timer_spkr_acquire();
231
232 AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc));
233
234 intr_suspend();
235
236 if (suspendctx(susppcbs[0])) {
237 #ifdef SMP
238 if (!CPU_EMPTY(&suspcpus) &&
239 suspend_cpus(suspcpus) == 0) {
240 device_printf(sc->acpi_dev, "Failed to suspend APs\n");
241 return (0); /* couldn't sleep */
242 }
243 #endif
244
245 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
246 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
247
248 WAKECODE_FIXUP(wakeup_cr4, register_t, susppcbs[0]->pcb_cr4);
249 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]);
250
251 /* Call ACPICA to enter the desired sleep state */
252 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
253 status = AcpiEnterSleepStateS4bios();
254 else
255 status = AcpiEnterSleepState(state);
256
257 if (status != AE_OK) {
258 device_printf(sc->acpi_dev,
259 "AcpiEnterSleepState failed - %s\n",
260 AcpiFormatException(status));
261 return (0); /* couldn't sleep */
262 }
263
264 for (;;)
265 ia32_pause();
266 }
267
268 return (1); /* wakeup successfully */
269 }
270
271 int
272 acpi_wakeup_machdep(struct acpi_softc *sc, int state,
273 int sleep_result, int intr_enabled)
274 {
275
276 if (sleep_result == -1)
277 return (sleep_result);
278
279 if (intr_enabled == 0) {
280 /* Wakeup MD procedures in interrupt disabled context */
281 if (sleep_result == 1) {
282 pmap_init_pat();
283 load_cr3(susppcbs[0]->pcb_cr3);
284 initializecpu();
285 PCPU_SET(switchtime, 0);
286 PCPU_SET(switchticks, ticks);
287 #ifdef SMP
288 if (!CPU_EMPTY(&suspcpus))
289 acpi_wakeup_cpus(sc, &suspcpus);
290 #endif
291 }
292
293 #ifdef SMP
294 if (!CPU_EMPTY(&suspcpus))
295 restart_cpus(suspcpus);
296 #endif
297 mca_resume();
298 intr_resume();
299 } else {
300 /* Wakeup MD procedures in interrupt enabled context */
301 AcpiSetFirmwareWakingVector(0);
302
303 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
304 mem_range_softc.mr_op->reinit != NULL)
305 mem_range_softc.mr_op->reinit(&mem_range_softc);
306 }
307
308 return (sleep_result);
309 }
310
311 static void *
312 acpi_alloc_wakeup_handler(void)
313 {
314 void *wakeaddr;
315 int i;
316
317 /*
318 * Specify the region for our wakeup code. We want it in the low 1 MB
319 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
320 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
321 * and ROM area (0xa0000 and above). The temporary page tables must be
322 * page-aligned.
323 */
324 wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF,
325 M_NOWAIT, 0x500, 0xa0000, PAGE_SIZE, 0ul);
326 if (wakeaddr == NULL) {
327 printf("%s: can't alloc wake memory\n", __func__);
328 return (NULL);
329 }
330 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
331 EVENTHANDLER_PRI_LAST) == NULL) {
332 printf("%s: can't register event handler\n", __func__);
333 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF);
334 return (NULL);
335 }
336 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
337 for (i = 0; i < mp_ncpus; i++) {
338 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
339 }
340
341 return (wakeaddr);
342 }
343
344 void
345 acpi_install_wakeup_handler(struct acpi_softc *sc)
346 {
347 static void *wakeaddr = NULL;
348
349 if (wakeaddr != NULL)
350 return;
351
352 wakeaddr = acpi_alloc_wakeup_handler();
353 if (wakeaddr == NULL)
354 return;
355
356 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
357 sc->acpi_wakephys = vtophys(wakeaddr);
358
359 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
360
361 /* Patch GDT base address, ljmp target. */
362 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
363 WAKECODE_PADDR(sc) + bootgdt);
364 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
365 WAKECODE_PADDR(sc) + wakeup_32);
366
367 /* Save pointers to some global data. */
368 WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
369 /*
370 * Temporarily switch to the kernel pmap because it provides
371 * an identity mapping (setup at boot) for the low physical
372 * memory region containing the wakeup code.
373 */
374 #ifdef PAE
375 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
376 #else
377 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
378 #endif
379
380 if (bootverbose)
381 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
382 sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
383 }
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