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/malloc.h>
37 #include <sys/memrange.h>
38 #include <sys/proc.h>
39 #include <sys/sysctl.h>
40
41 #include <vm/vm.h>
42 #include <vm/pmap.h>
43 #include <vm/vm_object.h>
44 #include <vm/vm_page.h>
45 #include <vm/vm_map.h>
46
47 #include <machine/bus.h>
48 #include <machine/cpufunc.h>
49 #include <machine/intr_machdep.h>
50 #include <machine/mca.h>
51 #include <machine/segments.h>
52
53 #include <contrib/dev/acpica/include/acpi.h>
54
55 #include <dev/acpica/acpivar.h>
56
57 #include "acpi_wakecode.h"
58
59 /* Make sure the code is less than one page and leave room for the stack. */
60 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
61
62 #ifndef _SYS_CDEFS_H_
63 #error this file needs sys/cdefs.h as a prerequisite
64 #endif
65
66 extern uint32_t acpi_resume_beep;
67 extern uint32_t acpi_reset_video;
68 extern void initializecpu(void);
69
70 static struct region_descriptor __used saved_idt, saved_gdt;
71 static struct region_descriptor *p_gdt;
72 static uint16_t __used saved_ldt;
73
74 static uint32_t __used r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
75 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
76
77 static uint16_t __used r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
78 static uint32_t __used r_esp;
79
80 static void acpi_printcpu(void);
81 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
82 int nsegs, int error);
83 static void acpi_alloc_wakeup_handler(void);
84
85 /* XXX shut gcc up */
86 extern int acpi_savecpu(void);
87 extern int acpi_restorecpu(void);
88
89 #ifdef __GNUCLIKE_ASM
90 __asm__(" \n\
91 .text \n\
92 .p2align 2, 0x90 \n\
93 .type acpi_restorecpu, @function\n\
94 acpi_restorecpu: \n\
95 .align 4 \n\
96 movl r_eax,%eax \n\
97 movl r_ebx,%ebx \n\
98 movl r_ecx,%ecx \n\
99 movl r_edx,%edx \n\
100 movl r_ebp,%ebp \n\
101 movl r_esi,%esi \n\
102 movl r_edi,%edi \n\
103 movl r_esp,%esp \n\
104 \n\
105 pushl r_efl \n\
106 popfl \n\
107 \n\
108 movl ret_addr,%eax \n\
109 movl %eax,(%esp) \n\
110 xorl %eax,%eax \n\
111 ret \n\
112 \n\
113 .text \n\
114 .p2align 2, 0x90 \n\
115 .type acpi_savecpu, @function \n\
116 acpi_savecpu: \n\
117 movw %cs,r_cs \n\
118 movw %ds,r_ds \n\
119 movw %es,r_es \n\
120 movw %fs,r_fs \n\
121 movw %gs,r_gs \n\
122 movw %ss,r_ss \n\
123 \n\
124 movl %eax,r_eax \n\
125 movl %ebx,r_ebx \n\
126 movl %ecx,r_ecx \n\
127 movl %edx,r_edx \n\
128 movl %ebp,r_ebp \n\
129 movl %esi,r_esi \n\
130 movl %edi,r_edi \n\
131 \n\
132 movl %cr0,%eax \n\
133 movl %eax,r_cr0 \n\
134 movl %cr2,%eax \n\
135 movl %eax,r_cr2 \n\
136 movl %cr3,%eax \n\
137 movl %eax,r_cr3 \n\
138 movl %cr4,%eax \n\
139 movl %eax,r_cr4 \n\
140 \n\
141 pushfl \n\
142 popl r_efl \n\
143 \n\
144 movl %esp,r_esp \n\
145 \n\
146 sgdt saved_gdt \n\
147 sidt saved_idt \n\
148 sldt saved_ldt \n\
149 str r_tr \n\
150 \n\
151 movl (%esp),%eax \n\
152 movl %eax,ret_addr \n\
153 movl $1,%eax \n\
154 ret \n\
155 ");
156 #endif /* __GNUCLIKE_ASM */
157
158 static void
159 acpi_printcpu(void)
160 {
161 printf("======== acpi_printcpu() debug dump ========\n");
162 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
163 saved_gdt.rd_limit, saved_gdt.rd_base,
164 saved_idt.rd_limit, saved_idt.rd_base,
165 saved_ldt, r_tr, r_efl);
166 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
167 r_eax, r_ebx, r_ecx, r_edx);
168 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
169 r_esi, r_edi, r_ebp, r_esp);
170 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
171 r_cr0, r_cr2, r_cr3, r_cr4);
172 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
173 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
174 }
175
176 #define WAKECODE_FIXUP(offset, type, val) do { \
177 type *addr; \
178 addr = (type *)(sc->acpi_wakeaddr + offset); \
179 *addr = val; \
180 } while (0)
181
182 #define WAKECODE_BCOPY(offset, type, val) do { \
183 void *addr; \
184 addr = (void *)(sc->acpi_wakeaddr + offset); \
185 bcopy(&(val), addr, sizeof(type)); \
186 } while (0)
187
188 /* Turn off bits 1&2 of the PIT, stopping the beep. */
189 static void
190 acpi_stop_beep(void *arg)
191 {
192 outb(0x61, inb(0x61) & ~0x3);
193 }
194
195 int
196 acpi_sleep_machdep(struct acpi_softc *sc, int state)
197 {
198 ACPI_STATUS status;
199 struct pmap *pm;
200 int ret;
201 uint32_t cr3;
202 u_long ef;
203
204 ret = -1;
205 if (sc->acpi_wakeaddr == 0)
206 return (ret);
207
208 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
209
210 ef = intr_disable();
211 intr_suspend();
212
213 /*
214 * Temporarily switch to the kernel pmap because it provides an
215 * identity mapping (setup at boot) for the low physical memory
216 * region containing the wakeup code.
217 */
218 pm = kernel_pmap;
219 cr3 = rcr3();
220 #ifdef PAE
221 load_cr3(vtophys(pm->pm_pdpt));
222 #else
223 load_cr3(vtophys(pm->pm_pdir));
224 #endif
225
226 ret_addr = 0;
227 if (acpi_savecpu()) {
228 /* Execute Sleep */
229
230 p_gdt = (struct region_descriptor *)
231 (sc->acpi_wakeaddr + physical_gdt);
232 p_gdt->rd_limit = saved_gdt.rd_limit;
233 p_gdt->rd_base = vtophys(saved_gdt.rd_base);
234
235 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
236 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
237 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
238 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
239 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
240
241 WAKECODE_FIXUP(resume_beep, uint32_t, acpi_resume_beep);
242 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
243
244 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
245 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, saved_gdt);
246 WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt);
247 WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_idt);
248
249 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
250
251 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
252 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
253 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
254 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
255 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
256
257 if (bootverbose)
258 acpi_printcpu();
259
260 /* Call ACPICA to enter the desired sleep state */
261 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
262 status = AcpiEnterSleepStateS4bios();
263 else
264 status = AcpiEnterSleepState(state);
265
266 if (status != AE_OK) {
267 device_printf(sc->acpi_dev,
268 "AcpiEnterSleepState failed - %s\n",
269 AcpiFormatException(status));
270 goto out;
271 }
272
273 for (;;)
274 ia32_pause();
275 } else {
276 pmap_init_pat();
277 PCPU_SET(switchtime, 0);
278 PCPU_SET(switchticks, ticks);
279 if (bootverbose) {
280 acpi_savecpu();
281 acpi_printcpu();
282 }
283 ret = 0;
284 }
285
286 out:
287 load_cr3(cr3);
288 mca_resume();
289 intr_resume();
290 intr_restore(ef);
291
292 if (ret == 0 && mem_range_softc.mr_op != NULL &&
293 mem_range_softc.mr_op->reinit != NULL)
294 mem_range_softc.mr_op->reinit(&mem_range_softc);
295
296 /* If we beeped, turn it off after a delay. */
297 if (acpi_resume_beep)
298 timeout(acpi_stop_beep, NULL, 3 * hz);
299
300 return (ret);
301 }
302
303 static bus_dma_tag_t acpi_waketag;
304 static bus_dmamap_t acpi_wakemap;
305 static vm_offset_t acpi_wakeaddr;
306
307 static void
308 acpi_alloc_wakeup_handler(void)
309 {
310 void *wakeaddr;
311
312 if (!cold)
313 return;
314
315 /*
316 * Specify the region for our wakeup code. We want it in the low 1 MB
317 * region, excluding video memory and above (0xa0000). We ask for
318 * it to be page-aligned, just to be safe.
319 */
320 if (bus_dma_tag_create(/*parent*/ NULL,
321 /*alignment*/ PAGE_SIZE, /*no boundary*/ 0,
322 /*lowaddr*/ 0x9ffff, /*highaddr*/ BUS_SPACE_MAXADDR, NULL, NULL,
323 /*maxsize*/ PAGE_SIZE, /*segments*/ 1, /*maxsegsize*/ PAGE_SIZE,
324 0, busdma_lock_mutex, &Giant, &acpi_waketag) != 0) {
325 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
326 return;
327 }
328 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, BUS_DMA_NOWAIT,
329 &acpi_wakemap) != 0) {
330 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
331 return;
332 }
333 acpi_wakeaddr = (vm_offset_t)wakeaddr;
334 }
335
336 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0);
337
338 static void
339 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
340 {
341 struct acpi_softc *sc;
342 uint32_t *addr;
343
344 /* Overwrite the ljmp target with the real address */
345 sc = arg;
346 sc->acpi_wakephys = segs[0].ds_addr;
347 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
348 *addr = sc->acpi_wakephys + wakeup_32;
349
350 /* Copy the wake code into our low page and save its physical addr. */
351 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
352 if (bootverbose) {
353 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
354 acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
355 }
356 }
357
358 void
359 acpi_install_wakeup_handler(struct acpi_softc *sc)
360 {
361 if (acpi_wakeaddr == 0)
362 return;
363
364 sc->acpi_waketag = acpi_waketag;
365 sc->acpi_wakeaddr = acpi_wakeaddr;
366 sc->acpi_wakemap = acpi_wakemap;
367
368 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
369 (void *)sc->acpi_wakeaddr, PAGE_SIZE, acpi_realmodeinst, sc, 0);
370 }
Cache object: 942345a0c2df12631837d41bf4f99d14
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