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/8.2/sys/i386/acpica/acpi_wakeup.c 210509 2010-07-26 18:22:46Z jhb $");
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/mca.h>
49 #include <machine/segments.h>
50
51 #include <contrib/dev/acpica/include/acpi.h>
52
53 #include <dev/acpica/acpivar.h>
54
55 #include "acpi_wakecode.h"
56
57 /* Make sure the code is less than one page and leave room for the stack. */
58 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
59
60 #ifndef _SYS_CDEFS_H_
61 #error this file needs sys/cdefs.h as a prerequisite
62 #endif
63
64 extern uint32_t acpi_resume_beep;
65 extern uint32_t acpi_reset_video;
66 extern void initializecpu(void);
67
68 static struct region_descriptor __used saved_idt, saved_gdt;
69 static struct region_descriptor *p_gdt;
70 static uint16_t __used saved_ldt;
71
72 static uint32_t __used r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
73 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
74
75 static uint16_t __used r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
76 static uint32_t __used r_esp;
77
78 static void acpi_printcpu(void);
79 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
80 int nsegs, int error);
81 static void acpi_alloc_wakeup_handler(void);
82
83 /* XXX shut gcc up */
84 extern int acpi_savecpu(void);
85 extern int acpi_restorecpu(void);
86
87 #ifdef __GNUCLIKE_ASM
88 __asm__(" \n\
89 .text \n\
90 .p2align 2, 0x90 \n\
91 .type acpi_restorecpu, @function\n\
92 acpi_restorecpu: \n\
93 .align 4 \n\
94 movl r_eax,%eax \n\
95 movl r_ebx,%ebx \n\
96 movl r_ecx,%ecx \n\
97 movl r_edx,%edx \n\
98 movl r_ebp,%ebp \n\
99 movl r_esi,%esi \n\
100 movl r_edi,%edi \n\
101 movl r_esp,%esp \n\
102 \n\
103 pushl r_efl \n\
104 popfl \n\
105 \n\
106 movl ret_addr,%eax \n\
107 movl %eax,(%esp) \n\
108 xorl %eax,%eax \n\
109 ret \n\
110 \n\
111 .text \n\
112 .p2align 2, 0x90 \n\
113 .type acpi_savecpu, @function \n\
114 acpi_savecpu: \n\
115 movw %cs,r_cs \n\
116 movw %ds,r_ds \n\
117 movw %es,r_es \n\
118 movw %fs,r_fs \n\
119 movw %gs,r_gs \n\
120 movw %ss,r_ss \n\
121 \n\
122 movl %eax,r_eax \n\
123 movl %ebx,r_ebx \n\
124 movl %ecx,r_ecx \n\
125 movl %edx,r_edx \n\
126 movl %ebp,r_ebp \n\
127 movl %esi,r_esi \n\
128 movl %edi,r_edi \n\
129 \n\
130 movl %cr0,%eax \n\
131 movl %eax,r_cr0 \n\
132 movl %cr2,%eax \n\
133 movl %eax,r_cr2 \n\
134 movl %cr3,%eax \n\
135 movl %eax,r_cr3 \n\
136 movl %cr4,%eax \n\
137 movl %eax,r_cr4 \n\
138 \n\
139 pushfl \n\
140 popl r_efl \n\
141 \n\
142 movl %esp,r_esp \n\
143 \n\
144 sgdt saved_gdt \n\
145 sidt saved_idt \n\
146 sldt saved_ldt \n\
147 str r_tr \n\
148 \n\
149 movl (%esp),%eax \n\
150 movl %eax,ret_addr \n\
151 movl $1,%eax \n\
152 ret \n\
153 ");
154 #endif /* __GNUCLIKE_ASM */
155
156 static void
157 acpi_printcpu(void)
158 {
159 printf("======== acpi_printcpu() debug dump ========\n");
160 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
161 saved_gdt.rd_limit, saved_gdt.rd_base,
162 saved_idt.rd_limit, saved_idt.rd_base,
163 saved_ldt, r_tr, r_efl);
164 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
165 r_eax, r_ebx, r_ecx, r_edx);
166 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
167 r_esi, r_edi, r_ebp, r_esp);
168 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
169 r_cr0, r_cr2, r_cr3, r_cr4);
170 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
171 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
172 }
173
174 #define WAKECODE_FIXUP(offset, type, val) do { \
175 type *addr; \
176 addr = (type *)(sc->acpi_wakeaddr + offset); \
177 *addr = val; \
178 } while (0)
179
180 #define WAKECODE_BCOPY(offset, type, val) do { \
181 void *addr; \
182 addr = (void *)(sc->acpi_wakeaddr + offset); \
183 bcopy(&(val), addr, sizeof(type)); \
184 } while (0)
185
186 /* Turn off bits 1&2 of the PIT, stopping the beep. */
187 static void
188 acpi_stop_beep(void *arg)
189 {
190 outb(0x61, inb(0x61) & ~0x3);
191 }
192
193 int
194 acpi_sleep_machdep(struct acpi_softc *sc, int state)
195 {
196 ACPI_STATUS status;
197 struct pmap *pm;
198 int ret;
199 uint32_t cr3;
200 u_long ef;
201
202 ret = 0;
203 if (sc->acpi_wakeaddr == 0)
204 return (0);
205
206 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
207
208 ef = read_eflags();
209
210 /*
211 * Temporarily switch to the kernel pmap because it provides an
212 * identity mapping (setup at boot) for the low physical memory
213 * region containing the wakeup code.
214 */
215 pm = kernel_pmap;
216 cr3 = rcr3();
217 #ifdef PAE
218 load_cr3(vtophys(pm->pm_pdpt));
219 #else
220 load_cr3(vtophys(pm->pm_pdir));
221 #endif
222
223 ret_addr = 0;
224 ACPI_DISABLE_IRQS();
225 if (acpi_savecpu()) {
226 /* Execute Sleep */
227 intr_suspend();
228
229 p_gdt = (struct region_descriptor *)
230 (sc->acpi_wakeaddr + physical_gdt);
231 p_gdt->rd_limit = saved_gdt.rd_limit;
232 p_gdt->rd_base = vtophys(saved_gdt.rd_base);
233
234 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
235 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
236 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
237 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
238 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
239
240 WAKECODE_FIXUP(resume_beep, uint32_t, acpi_resume_beep);
241 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
242
243 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
244 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, saved_gdt);
245 WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt);
246 WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_idt);
247
248 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
249
250 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
251 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
252 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
253 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
254 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
255
256 if (bootverbose)
257 acpi_printcpu();
258
259 /* Call ACPICA to enter the desired sleep state */
260 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
261 status = AcpiEnterSleepStateS4bios();
262 else
263 status = AcpiEnterSleepState(state);
264
265 if (status != AE_OK) {
266 device_printf(sc->acpi_dev,
267 "AcpiEnterSleepState failed - %s\n",
268 AcpiFormatException(status));
269 ret = -1;
270 goto out;
271 }
272
273 for (;;) ;
274 } else {
275 /* Execute Wakeup */
276 mca_resume();
277 intr_resume();
278
279 if (bootverbose) {
280 acpi_savecpu();
281 acpi_printcpu();
282 }
283 }
284
285 out:
286 load_cr3(cr3);
287 write_eflags(ef);
288
289 /* If we beeped, turn it off after a delay. */
290 if (acpi_resume_beep)
291 timeout(acpi_stop_beep, NULL, 3 * hz);
292
293 return (ret);
294 }
295
296 static bus_dma_tag_t acpi_waketag;
297 static bus_dmamap_t acpi_wakemap;
298 static vm_offset_t acpi_wakeaddr;
299
300 static void
301 acpi_alloc_wakeup_handler(void)
302 {
303 void *wakeaddr;
304
305 if (!cold)
306 return;
307
308 /*
309 * Specify the region for our wakeup code. We want it in the low 1 MB
310 * region, excluding video memory and above (0xa0000). We ask for
311 * it to be page-aligned, just to be safe.
312 */
313 if (bus_dma_tag_create(/*parent*/ NULL,
314 /*alignment*/ PAGE_SIZE, /*no boundary*/ 0,
315 /*lowaddr*/ 0x9ffff, /*highaddr*/ BUS_SPACE_MAXADDR, NULL, NULL,
316 /*maxsize*/ PAGE_SIZE, /*segments*/ 1, /*maxsegsize*/ PAGE_SIZE,
317 0, busdma_lock_mutex, &Giant, &acpi_waketag) != 0) {
318 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
319 return;
320 }
321 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, BUS_DMA_NOWAIT,
322 &acpi_wakemap) != 0) {
323 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
324 return;
325 }
326 acpi_wakeaddr = (vm_offset_t)wakeaddr;
327 }
328
329 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0);
330
331 static void
332 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
333 {
334 struct acpi_softc *sc;
335 uint32_t *addr;
336
337 /* Overwrite the ljmp target with the real address */
338 sc = arg;
339 sc->acpi_wakephys = segs[0].ds_addr;
340 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
341 *addr = sc->acpi_wakephys + wakeup_32;
342
343 /* Copy the wake code into our low page and save its physical addr. */
344 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
345 if (bootverbose) {
346 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
347 acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
348 }
349 }
350
351 void
352 acpi_install_wakeup_handler(struct acpi_softc *sc)
353 {
354 if (acpi_wakeaddr == 0)
355 return;
356
357 sc->acpi_waketag = acpi_waketag;
358 sc->acpi_wakeaddr = acpi_wakeaddr;
359 sc->acpi_wakemap = acpi_wakemap;
360
361 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
362 (void *)sc->acpi_wakeaddr, PAGE_SIZE, acpi_realmodeinst, sc, 0);
363 }
Cache object: cd68a849b23d90baad481a63def546ef
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