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 <contrib/dev/acpica/acpi.h>
51 #include <dev/acpica/acpivar.h>
52
53 #include "acpi_wakecode.h"
54
55 /* Make sure the code is less than one page and leave room for the stack. */
56 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
57
58 #ifndef _SYS_CDEFS_H_
59 #error this file needs sys/cdefs.h as a prerequisite
60 #endif
61
62 extern uint32_t acpi_resume_beep;
63 extern uint32_t acpi_reset_video;
64 extern void initializecpu(void);
65
66 static struct region_descriptor saved_idt, saved_gdt, *p_gdt;
67 static uint16_t saved_ldt;
68
69 static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
70 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
71
72 static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
73 static uint32_t r_esp;
74
75 static void acpi_printcpu(void);
76 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
77 int nsegs, int error);
78 static void acpi_alloc_wakeup_handler(void);
79
80 /* XXX shut gcc up */
81 extern int acpi_savecpu(void);
82 extern int acpi_restorecpu(void);
83
84 #ifdef __GNUCLIKE_ASM
85 __asm__(" \n\
86 .text \n\
87 .p2align 2, 0x90 \n\
88 .type acpi_restorecpu, @function\n\
89 acpi_restorecpu: \n\
90 .align 4 \n\
91 movl r_eax,%eax \n\
92 movl r_ebx,%ebx \n\
93 movl r_ecx,%ecx \n\
94 movl r_edx,%edx \n\
95 movl r_ebp,%ebp \n\
96 movl r_esi,%esi \n\
97 movl r_edi,%edi \n\
98 movl r_esp,%esp \n\
99 \n\
100 pushl r_efl \n\
101 popfl \n\
102 \n\
103 movl ret_addr,%eax \n\
104 movl %eax,(%esp) \n\
105 xorl %eax,%eax \n\
106 ret \n\
107 \n\
108 .text \n\
109 .p2align 2, 0x90 \n\
110 .type acpi_savecpu, @function \n\
111 acpi_savecpu: \n\
112 movw %cs,r_cs \n\
113 movw %ds,r_ds \n\
114 movw %es,r_es \n\
115 movw %fs,r_fs \n\
116 movw %gs,r_gs \n\
117 movw %ss,r_ss \n\
118 \n\
119 movl %eax,r_eax \n\
120 movl %ebx,r_ebx \n\
121 movl %ecx,r_ecx \n\
122 movl %edx,r_edx \n\
123 movl %ebp,r_ebp \n\
124 movl %esi,r_esi \n\
125 movl %edi,r_edi \n\
126 \n\
127 movl %cr0,%eax \n\
128 movl %eax,r_cr0 \n\
129 movl %cr2,%eax \n\
130 movl %eax,r_cr2 \n\
131 movl %cr3,%eax \n\
132 movl %eax,r_cr3 \n\
133 movl %cr4,%eax \n\
134 movl %eax,r_cr4 \n\
135 \n\
136 pushfl \n\
137 popl r_efl \n\
138 \n\
139 movl %esp,r_esp \n\
140 \n\
141 sgdt saved_gdt \n\
142 sidt saved_idt \n\
143 sldt saved_ldt \n\
144 str r_tr \n\
145 \n\
146 movl (%esp),%eax \n\
147 movl %eax,ret_addr \n\
148 movl $1,%eax \n\
149 ret \n\
150 ");
151 #endif /* __GNUCLIKE_ASM */
152
153 static void
154 acpi_printcpu(void)
155 {
156 printf("======== acpi_printcpu() debug dump ========\n");
157 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
158 saved_gdt.rd_limit, saved_gdt.rd_base,
159 saved_idt.rd_limit, saved_idt.rd_base,
160 saved_ldt, r_tr, r_efl);
161 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
162 r_eax, r_ebx, r_ecx, r_edx);
163 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
164 r_esi, r_edi, r_ebp, r_esp);
165 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
166 r_cr0, r_cr2, r_cr3, r_cr4);
167 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
168 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
169 }
170
171 #define WAKECODE_FIXUP(offset, type, val) do { \
172 type *addr; \
173 addr = (type *)(sc->acpi_wakeaddr + offset); \
174 *addr = val; \
175 } while (0)
176
177 #define WAKECODE_BCOPY(offset, type, val) do { \
178 void *addr; \
179 addr = (void *)(sc->acpi_wakeaddr + offset); \
180 bcopy(&(val), addr, sizeof(type)); \
181 } while (0)
182
183 /* Turn off bits 1&2 of the PIT, stopping the beep. */
184 static void
185 acpi_stop_beep(void *arg)
186 {
187 outb(0x61, inb(0x61) & ~0x3);
188 }
189
190 int
191 acpi_sleep_machdep(struct acpi_softc *sc, int state)
192 {
193 ACPI_STATUS status;
194 struct pmap *pm;
195 int ret;
196 uint32_t cr3;
197 u_long ef;
198
199 ret = 0;
200 if (sc->acpi_wakeaddr == 0)
201 return (0);
202
203 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
204
205 ef = read_eflags();
206
207 /*
208 * Temporarily switch to the kernel pmap because it provides an
209 * identity mapping (setup at boot) for the low physical memory
210 * region containing the wakeup code.
211 */
212 pm = kernel_pmap;
213 cr3 = rcr3();
214 #ifdef PAE
215 load_cr3(vtophys(pm->pm_pdpt));
216 #else
217 load_cr3(vtophys(pm->pm_pdir));
218 #endif
219
220 ret_addr = 0;
221 ACPI_DISABLE_IRQS();
222 if (acpi_savecpu()) {
223 /* Execute Sleep */
224 intr_suspend();
225
226 p_gdt = (struct region_descriptor *)
227 (sc->acpi_wakeaddr + physical_gdt);
228 p_gdt->rd_limit = saved_gdt.rd_limit;
229 p_gdt->rd_base = vtophys(saved_gdt.rd_base);
230
231 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
232 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
233 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
234 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
235 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
236
237 WAKECODE_FIXUP(resume_beep, uint32_t, acpi_resume_beep);
238 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
239
240 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
241 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, saved_gdt);
242 WAKECODE_FIXUP(previous_ldt, uint16_t, saved_ldt);
243 WAKECODE_BCOPY(previous_idt, struct region_descriptor, saved_idt);
244
245 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
246
247 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
248 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
249 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
250 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
251 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
252
253 if (bootverbose)
254 acpi_printcpu();
255
256 /* Call ACPICA to enter the desired sleep state */
257 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
258 status = AcpiEnterSleepStateS4bios();
259 else
260 status = AcpiEnterSleepState(state);
261
262 if (status != AE_OK) {
263 device_printf(sc->acpi_dev,
264 "AcpiEnterSleepState failed - %s\n",
265 AcpiFormatException(status));
266 ret = -1;
267 goto out;
268 }
269
270 for (;;) ;
271 } else {
272 /* Execute Wakeup */
273 intr_resume();
274
275 if (bootverbose) {
276 acpi_savecpu();
277 acpi_printcpu();
278 }
279 }
280
281 out:
282 load_cr3(cr3);
283 write_eflags(ef);
284
285 /* If we beeped, turn it off after a delay. */
286 if (acpi_resume_beep)
287 timeout(acpi_stop_beep, NULL, 3 * hz);
288
289 return (ret);
290 }
291
292 static bus_dma_tag_t acpi_waketag;
293 static bus_dmamap_t acpi_wakemap;
294 static vm_offset_t acpi_wakeaddr;
295
296 static void
297 acpi_alloc_wakeup_handler(void)
298 {
299 void *wakeaddr;
300
301 if (!cold)
302 return;
303
304 /*
305 * Specify the region for our wakeup code. We want it in the low 1 MB
306 * region, excluding video memory and above (0xa0000). We ask for
307 * it to be page-aligned, just to be safe.
308 */
309 if (bus_dma_tag_create(/*parent*/ NULL,
310 /*alignment*/ PAGE_SIZE, /*no boundary*/ 0,
311 /*lowaddr*/ 0x9ffff, /*highaddr*/ BUS_SPACE_MAXADDR, NULL, NULL,
312 /*maxsize*/ PAGE_SIZE, /*segments*/ 1, /*maxsegsize*/ PAGE_SIZE,
313 0, busdma_lock_mutex, &Giant, &acpi_waketag) != 0) {
314 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
315 return;
316 }
317 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr, BUS_DMA_NOWAIT,
318 &acpi_wakemap) != 0) {
319 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
320 return;
321 }
322 acpi_wakeaddr = (vm_offset_t)wakeaddr;
323 }
324
325 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
326
327 static void
328 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
329 {
330 struct acpi_softc *sc;
331 uint32_t *addr;
332
333 /* Overwrite the ljmp target with the real address */
334 sc = arg;
335 sc->acpi_wakephys = segs[0].ds_addr;
336 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
337 *addr = sc->acpi_wakephys + wakeup_32;
338
339 /* Copy the wake code into our low page and save its physical addr. */
340 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
341 if (bootverbose) {
342 device_printf(sc->acpi_dev, "wakeup code va %#x pa %#jx\n",
343 acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
344 }
345 }
346
347 void
348 acpi_install_wakeup_handler(struct acpi_softc *sc)
349 {
350 if (acpi_wakeaddr == 0)
351 return;
352
353 sc->acpi_waketag = acpi_waketag;
354 sc->acpi_wakeaddr = acpi_wakeaddr;
355 sc->acpi_wakemap = acpi_wakemap;
356
357 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
358 (void *)sc->acpi_wakeaddr, PAGE_SIZE, acpi_realmodeinst, sc, 0);
359 }
Cache object: 19fb7ce3fad444b3c56f21980ac65ff6
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