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/5.2/sys/i386/acpica/acpi_wakeup.c 121993 2003-11-03 22:18:57Z 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/vm_param.h>
41 #include <vm/pmap.h>
42 #include <vm/vm_object.h>
43 #include <vm/vm_page.h>
44 #include <vm/vm_map.h>
45 #include <vm/vm_kern.h>
46 #include <vm/vm_extern.h>
47
48 #include <machine/bus.h>
49 #include <machine/cpufunc.h>
50 #include <machine/intr_machdep.h>
51 #include <machine/segments.h>
52
53 #include "acpi.h"
54 #include <dev/acpica/acpivar.h>
55
56 #include "acpi_wakecode.h"
57
58 #if __FreeBSD_version < 500000
59 #define vm_page_lock_queues()
60 #define vm_page_unlock_queues()
61 #endif
62
63 extern uint32_t acpi_reset_video;
64 extern void initializecpu(void);
65
66 static struct region_descriptor r_idt, r_gdt, *p_gdt;
67 static u_int16_t r_ldt;
68
69 static u_int32_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 u_int16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
73 static u_int32_t r_esp = 0;
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 __GNUC__
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 r_gdt \n\
142 sidt r_idt \n\
143 sldt r_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 /* __GNUC__ */
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 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
159 r_ldt, r_tr, r_efl);
160 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
161 r_eax, r_ebx, r_ecx, r_edx);
162 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
163 r_esi, r_edi, r_ebp, r_esp);
164 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
165 r_cr0, r_cr2, r_cr3, r_cr4);
166 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
167 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
168 }
169
170 #define WAKECODE_FIXUP(offset, type, val) do { \
171 void **addr; \
172 addr = (void **)(sc->acpi_wakeaddr + offset); \
173 (type *)*addr = val; \
174 } while (0)
175
176 #define WAKECODE_BCOPY(offset, type, val) do { \
177 void **addr; \
178 addr = (void **)(sc->acpi_wakeaddr + offset); \
179 bcopy(&(val), addr, sizeof(type)); \
180 } while (0)
181
182 int
183 acpi_sleep_machdep(struct acpi_softc *sc, int state)
184 {
185 ACPI_STATUS status;
186 vm_paddr_t oldphys;
187 struct pmap *pm;
188 vm_page_t page;
189 static vm_page_t opage = NULL;
190 int ret = 0;
191 u_int32_t cr3;
192 u_long ef;
193 struct proc *p;
194
195 if (sc->acpi_wakeaddr == 0)
196 return (0);
197
198 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
199
200 ef = read_eflags();
201 ACPI_DISABLE_IRQS();
202
203 /* Create Identity Mapping */
204 if ((p = curproc) == NULL)
205 p = &proc0;
206 pm = vmspace_pmap(p->p_vmspace);
207 cr3 = rcr3();
208 #ifdef PAE
209 load_cr3(vtophys(pm->pm_pdpt));
210 #else
211 load_cr3(vtophys(pm->pm_pdir));
212 #endif
213
214 oldphys = pmap_extract(pm, sc->acpi_wakephys);
215 if (oldphys)
216 opage = PHYS_TO_VM_PAGE(oldphys);
217 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
218 pmap_enter(pm, sc->acpi_wakephys, page,
219 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
220
221 ret_addr = 0;
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 = r_gdt.rd_limit;
229 p_gdt->rd_base = vtophys(r_gdt.rd_base);
230
231 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp));
232 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0);
233 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2);
234 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3);
235 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4);
236
237 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
238
239 WAKECODE_FIXUP(previous_tr, u_int16_t, r_tr);
240 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
241 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt);
242 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
243
244 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu);
245
246 WAKECODE_FIXUP(previous_ds, u_int16_t, r_ds);
247 WAKECODE_FIXUP(previous_es, u_int16_t, r_es);
248 WAKECODE_FIXUP(previous_fs, u_int16_t, r_fs);
249 WAKECODE_FIXUP(previous_gs, u_int16_t, r_gs);
250 WAKECODE_FIXUP(previous_ss, u_int16_t, r_ss);
251
252 if (acpi_get_verbose(sc))
253 acpi_printcpu();
254
255 /* Call ACPICA to enter the desired sleep state */
256 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
257 status = AcpiEnterSleepStateS4bios();
258 else
259 status = AcpiEnterSleepState(state);
260
261 if (status != AE_OK) {
262 device_printf(sc->acpi_dev,
263 "AcpiEnterSleepState failed - %s\n",
264 AcpiFormatException(status));
265 ret = -1;
266 goto out;
267 }
268
269 for (;;) ;
270 } else {
271 /* Execute Wakeup */
272 #if 0
273 initializecpu();
274 #endif
275 intr_resume();
276
277 if (acpi_get_verbose(sc)) {
278 acpi_savecpu();
279 acpi_printcpu();
280 }
281 }
282
283 out:
284 vm_page_lock_queues();
285 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
286 vm_page_unlock_queues();
287 if (opage) {
288 pmap_enter(pm, sc->acpi_wakephys, page,
289 VM_PROT_READ | VM_PROT_WRITE, 0);
290 }
291
292 load_cr3(cr3);
293
294 write_eflags(ef);
295
296 return (ret);
297 }
298
299 static bus_dma_tag_t acpi_waketag;
300 static bus_dmamap_t acpi_wakemap;
301 static vm_offset_t acpi_wakeaddr = 0;
302
303 static void
304 acpi_alloc_wakeup_handler(void)
305 {
306 if (!cold)
307 return;
308
309 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
310 /* lowaddr below 1MB */ 0x9ffff,
311 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
312 PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex,
313 &Giant, &acpi_waketag) != 0) {
314 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
315 return;
316 }
317
318 if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
319 BUS_DMA_NOWAIT, &acpi_wakemap)) {
320 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
321 return;
322 }
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 = arg;
331 u_int32_t *addr;
332
333 addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2];
334 *addr = segs[0].ds_addr + wakeup_32;
335 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
336 sc->acpi_wakephys = segs[0].ds_addr;
337 }
338
339 void
340 acpi_install_wakeup_handler(struct acpi_softc *sc)
341 {
342 if (acpi_wakeaddr == 0)
343 return;
344
345 sc->acpi_waketag = acpi_waketag;
346 sc->acpi_wakeaddr = acpi_wakeaddr;
347 sc->acpi_wakemap = acpi_wakemap;
348
349 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
350 (void *)sc->acpi_wakeaddr, PAGE_SIZE,
351 acpi_realmodeinst, sc, 0);
352 }
Cache object: b1edce6bd292cbff742b23eeaa0040de
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