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: releng/8.0/sys/i386/acpica/acpi_wakeup.c 193530 2009-06-05 18:44:36Z jkim $");
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/include/acpi.h>
51
52 #include <dev/acpica/acpivar.h>
53
54 #include "acpi_wakecode.h"
55
56 /* Make sure the code is less than one page and leave room for the stack. */
57 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
58
59 #ifndef _SYS_CDEFS_H_
60 #error this file needs sys/cdefs.h as a prerequisite
61 #endif
62
63 extern uint32_t acpi_resume_beep;
64 extern uint32_t acpi_reset_video;
65 extern void initializecpu(void);
66
67 static struct region_descriptor __used saved_idt, saved_gdt;
68 static struct region_descriptor *p_gdt;
69 static uint16_t __used saved_ldt;
70
71 static uint32_t __used r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
72 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
73
74 static uint16_t __used r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
75 static uint32_t __used r_esp;
76
77 static void acpi_printcpu(void);
78 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
79 int nsegs, int error);
80 static void acpi_alloc_wakeup_handler(void);
81
82 /* XXX shut gcc up */
83 extern int acpi_savecpu(void);
84 extern int acpi_restorecpu(void);
85
86 #ifdef __GNUCLIKE_ASM
87 __asm__(" \n\
88 .text \n\
89 .p2align 2, 0x90 \n\
90 .type acpi_restorecpu, @function\n\
91 acpi_restorecpu: \n\
92 .align 4 \n\
93 movl r_eax,%eax \n\
94 movl r_ebx,%ebx \n\
95 movl r_ecx,%ecx \n\
96 movl r_edx,%edx \n\
97 movl r_ebp,%ebp \n\
98 movl r_esi,%esi \n\
99 movl r_edi,%edi \n\
100 movl r_esp,%esp \n\
101 \n\
102 pushl r_efl \n\
103 popfl \n\
104 \n\
105 movl ret_addr,%eax \n\
106 movl %eax,(%esp) \n\
107 xorl %eax,%eax \n\
108 ret \n\
109 \n\
110 .text \n\
111 .p2align 2, 0x90 \n\
112 .type acpi_savecpu, @function \n\
113 acpi_savecpu: \n\
114 movw %cs,r_cs \n\
115 movw %ds,r_ds \n\
116 movw %es,r_es \n\
117 movw %fs,r_fs \n\
118 movw %gs,r_gs \n\
119 movw %ss,r_ss \n\
120 \n\
121 movl %eax,r_eax \n\
122 movl %ebx,r_ebx \n\
123 movl %ecx,r_ecx \n\
124 movl %edx,r_edx \n\
125 movl %ebp,r_ebp \n\
126 movl %esi,r_esi \n\
127 movl %edi,r_edi \n\
128 \n\
129 movl %cr0,%eax \n\
130 movl %eax,r_cr0 \n\
131 movl %cr2,%eax \n\
132 movl %eax,r_cr2 \n\
133 movl %cr3,%eax \n\
134 movl %eax,r_cr3 \n\
135 movl %cr4,%eax \n\
136 movl %eax,r_cr4 \n\
137 \n\
138 pushfl \n\
139 popl r_efl \n\
140 \n\
141 movl %esp,r_esp \n\
142 \n\
143 sgdt saved_gdt \n\
144 sidt saved_idt \n\
145 sldt saved_ldt \n\
146 str r_tr \n\
147 \n\
148 movl (%esp),%eax \n\
149 movl %eax,ret_addr \n\
150 movl $1,%eax \n\
151 ret \n\
152 ");
153 #endif /* __GNUCLIKE_ASM */
154
155 static void
156 acpi_printcpu(void)
157 {
158 printf("======== acpi_printcpu() debug dump ========\n");
159 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
160 saved_gdt.rd_limit, saved_gdt.rd_base,
161 saved_idt.rd_limit, saved_idt.rd_base,
162 saved_ldt, r_tr, r_efl);
163 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
164 r_eax, r_ebx, r_ecx, r_edx);
165 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
166 r_esi, r_edi, r_ebp, r_esp);
167 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
168 r_cr0, r_cr2, r_cr3, r_cr4);
169 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
170 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
171 }
172
173 #define WAKECODE_FIXUP(offset, type, val) do { \
174 type *addr; \
175 addr = (type *)(sc->acpi_wakeaddr + offset); \
176 *addr = val; \
177 } while (0)
178
179 #define WAKECODE_BCOPY(offset, type, val) do { \
180 void *addr; \
181 addr = (void *)(sc->acpi_wakeaddr + offset); \
182 bcopy(&(val), addr, sizeof(type)); \
183 } while (0)
184
185 /* Turn off bits 1&2 of the PIT, stopping the beep. */
186 static void
187 acpi_stop_beep(void *arg)
188 {
189 outb(0x61, inb(0x61) & ~0x3);
190 }
191
192 int
193 acpi_sleep_machdep(struct acpi_softc *sc, int state)
194 {
195 ACPI_STATUS status;
196 struct pmap *pm;
197 int ret;
198 uint32_t cr3;
199 u_long ef;
200
201 ret = 0;
202 if (sc->acpi_wakeaddr == 0)
203 return (0);
204
205 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
206
207 ef = read_eflags();
208
209 /*
210 * Temporarily switch to the kernel pmap because it provides an
211 * identity mapping (setup at boot) for the low physical memory
212 * region containing the wakeup code.
213 */
214 pm = kernel_pmap;
215 cr3 = rcr3();
216 #ifdef PAE
217 load_cr3(vtophys(pm->pm_pdpt));
218 #else
219 load_cr3(vtophys(pm->pm_pdir));
220 #endif
221
222 ret_addr = 0;
223 ACPI_DISABLE_IRQS();
224 if (acpi_savecpu()) {
225 /* Execute Sleep */
226 intr_suspend();
227
228 p_gdt = (struct region_descriptor *)
229 (sc->acpi_wakeaddr + physical_gdt);
230 p_gdt->rd_limit = saved_gdt.rd_limit;
231 p_gdt->rd_base = vtophys(saved_gdt.rd_base);
232
233 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
234 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
235 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
236 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
237 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
238
239 WAKECODE_FIXUP(resume_beep, uint32_t, acpi_resume_beep);
240 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
241
242 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
243 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, saved_gdt);
244 WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt);
245 WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_idt);
246
247 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
248
249 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
250 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
251 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
252 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
253 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
254
255 if (bootverbose)
256 acpi_printcpu();
257
258 /* Call ACPICA to enter the desired sleep state */
259 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
260 status = AcpiEnterSleepStateS4bios();
261 else
262 status = AcpiEnterSleepState(state);
263
264 if (status != AE_OK) {
265 device_printf(sc->acpi_dev,
266 "AcpiEnterSleepState failed - %s\n",
267 AcpiFormatException(status));
268 ret = -1;
269 goto out;
270 }
271
272 for (;;) ;
273 } else {
274 /* Execute Wakeup */
275 intr_resume();
276
277 if (bootverbose) {
278 acpi_savecpu();
279 acpi_printcpu();
280 }
281 }
282
283 out:
284 load_cr3(cr3);
285 write_eflags(ef);
286
287 /* If we beeped, turn it off after a delay. */
288 if (acpi_resume_beep)
289 timeout(acpi_stop_beep, NULL, 3 * hz);
290
291 return (ret);
292 }
293
294 static bus_dma_tag_t acpi_waketag;
295 static bus_dmamap_t acpi_wakemap;
296 static vm_offset_t acpi_wakeaddr;
297
298 static void
299 acpi_alloc_wakeup_handler(void)
300 {
301 void *wakeaddr;
302
303 if (!cold)
304 return;
305
306 /*
307 * Specify the region for our wakeup code. We want it in the low 1 MB
308 * region, excluding video memory and above (0xa0000). We ask for
309 * it to be page-aligned, just to be safe.
310 */
311 if (bus_dma_tag_create(/*parent*/ NULL,
312 /*alignment*/ PAGE_SIZE, /*no boundary*/ 0,
313 /*lowaddr*/ 0x9ffff, /*highaddr*/ BUS_SPACE_MAXADDR, NULL, NULL,
314 /*maxsize*/ PAGE_SIZE, /*segments*/ 1, /*maxsegsize*/ PAGE_SIZE,
315 0, busdma_lock_mutex, &Giant, &acpi_waketag) != 0) {
316 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
317 return;
318 }
319 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, BUS_DMA_NOWAIT,
320 &acpi_wakemap) != 0) {
321 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
322 return;
323 }
324 acpi_wakeaddr = (vm_offset_t)wakeaddr;
325 }
326
327 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0);
328
329 static void
330 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
331 {
332 struct acpi_softc *sc;
333 uint32_t *addr;
334
335 /* Overwrite the ljmp target with the real address */
336 sc = arg;
337 sc->acpi_wakephys = segs[0].ds_addr;
338 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
339 *addr = sc->acpi_wakephys + wakeup_32;
340
341 /* Copy the wake code into our low page and save its physical addr. */
342 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
343 if (bootverbose) {
344 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
345 acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
346 }
347 }
348
349 void
350 acpi_install_wakeup_handler(struct acpi_softc *sc)
351 {
352 if (acpi_wakeaddr == 0)
353 return;
354
355 sc->acpi_waketag = acpi_waketag;
356 sc->acpi_wakeaddr = acpi_wakeaddr;
357 sc->acpi_wakemap = acpi_wakemap;
358
359 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
360 (void *)sc->acpi_wakeaddr, PAGE_SIZE, acpi_realmodeinst, sc, 0);
361 }
Cache object: ffa50f8554871de5920c5a199a45fe1d
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