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/6.1/sys/i386/acpica/acpi_wakeup.c 152152 2005-11-07 09:53:25Z obrien $");
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 #ifndef _SYS_CDEFS_H_
56 #error this file needs sys/cdefs.h as a prerequisite
57 #endif
58
59 extern uint32_t acpi_reset_video;
60 extern void initializecpu(void);
61
62 static struct region_descriptor r_idt, r_gdt, *p_gdt;
63 static uint16_t r_ldt;
64
65 static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
66 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
67
68 static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
69 static uint32_t r_esp = 0;
70
71 static void acpi_printcpu(void);
72 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
73 int nsegs, int error);
74 static void acpi_alloc_wakeup_handler(void);
75
76 /* XXX shut gcc up */
77 extern int acpi_savecpu(void);
78 extern int acpi_restorecpu(void);
79
80 #ifdef __GNUCLIKE_ASM
81 __asm__(" \n\
82 .text \n\
83 .p2align 2, 0x90 \n\
84 .type acpi_restorecpu, @function\n\
85 acpi_restorecpu: \n\
86 .align 4 \n\
87 movl r_eax,%eax \n\
88 movl r_ebx,%ebx \n\
89 movl r_ecx,%ecx \n\
90 movl r_edx,%edx \n\
91 movl r_ebp,%ebp \n\
92 movl r_esi,%esi \n\
93 movl r_edi,%edi \n\
94 movl r_esp,%esp \n\
95 \n\
96 pushl r_efl \n\
97 popfl \n\
98 \n\
99 movl ret_addr,%eax \n\
100 movl %eax,(%esp) \n\
101 xorl %eax,%eax \n\
102 ret \n\
103 \n\
104 .text \n\
105 .p2align 2, 0x90 \n\
106 .type acpi_savecpu, @function \n\
107 acpi_savecpu: \n\
108 movw %cs,r_cs \n\
109 movw %ds,r_ds \n\
110 movw %es,r_es \n\
111 movw %fs,r_fs \n\
112 movw %gs,r_gs \n\
113 movw %ss,r_ss \n\
114 \n\
115 movl %eax,r_eax \n\
116 movl %ebx,r_ebx \n\
117 movl %ecx,r_ecx \n\
118 movl %edx,r_edx \n\
119 movl %ebp,r_ebp \n\
120 movl %esi,r_esi \n\
121 movl %edi,r_edi \n\
122 \n\
123 movl %cr0,%eax \n\
124 movl %eax,r_cr0 \n\
125 movl %cr2,%eax \n\
126 movl %eax,r_cr2 \n\
127 movl %cr3,%eax \n\
128 movl %eax,r_cr3 \n\
129 movl %cr4,%eax \n\
130 movl %eax,r_cr4 \n\
131 \n\
132 pushfl \n\
133 popl r_efl \n\
134 \n\
135 movl %esp,r_esp \n\
136 \n\
137 sgdt r_gdt \n\
138 sidt r_idt \n\
139 sldt r_ldt \n\
140 str r_tr \n\
141 \n\
142 movl (%esp),%eax \n\
143 movl %eax,ret_addr \n\
144 movl $1,%eax \n\
145 ret \n\
146 ");
147 #endif /* __GNUCLIKE_ASM */
148
149 static void
150 acpi_printcpu(void)
151 {
152 printf("======== acpi_printcpu() debug dump ========\n");
153 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
154 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
155 r_ldt, r_tr, r_efl);
156 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
157 r_eax, r_ebx, r_ecx, r_edx);
158 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
159 r_esi, r_edi, r_ebp, r_esp);
160 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
161 r_cr0, r_cr2, r_cr3, r_cr4);
162 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
163 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
164 }
165
166 #define WAKECODE_FIXUP(offset, type, val) do { \
167 type *addr; \
168 addr = (type *)(sc->acpi_wakeaddr + offset); \
169 *addr = val; \
170 } while (0)
171
172 #define WAKECODE_BCOPY(offset, type, val) do { \
173 void *addr; \
174 addr = (void *)(sc->acpi_wakeaddr + offset); \
175 bcopy(&(val), addr, sizeof(type)); \
176 } while (0)
177
178 int
179 acpi_sleep_machdep(struct acpi_softc *sc, int state)
180 {
181 ACPI_STATUS status;
182 struct pmap *pm;
183 vm_page_t page;
184 int ret;
185 uint32_t cr3;
186 u_long ef;
187 struct proc *p;
188
189 ret = 0;
190 if (sc->acpi_wakeaddr == 0)
191 return (0);
192
193 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
194
195 ef = read_eflags();
196
197 /* Create Identity Mapping */
198 if ((p = curproc) == NULL)
199 p = &proc0;
200 pm = vmspace_pmap(p->p_vmspace);
201 cr3 = rcr3();
202 #ifdef PAE
203 load_cr3(vtophys(pm->pm_pdpt));
204 #else
205 load_cr3(vtophys(pm->pm_pdir));
206 #endif
207
208 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
209 pmap_enter(pm, sc->acpi_wakephys, page,
210 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
211
212 ret_addr = 0;
213 ACPI_DISABLE_IRQS();
214 if (acpi_savecpu()) {
215 /* Execute Sleep */
216 intr_suspend();
217
218 p_gdt = (struct region_descriptor *)
219 (sc->acpi_wakeaddr + physical_gdt);
220 p_gdt->rd_limit = r_gdt.rd_limit;
221 p_gdt->rd_base = vtophys(r_gdt.rd_base);
222
223 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
224 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
225 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
226 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
227 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
228
229 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
230
231 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
232 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
233 WAKECODE_FIXUP(previous_ldt, uint16_t, r_ldt);
234 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
235
236 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
237
238 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
239 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
240 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
241 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
242 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
243
244 if (bootverbose)
245 acpi_printcpu();
246
247 /* Call ACPICA to enter the desired sleep state */
248 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
249 status = AcpiEnterSleepStateS4bios();
250 else
251 status = AcpiEnterSleepState(state);
252
253 if (status != AE_OK) {
254 device_printf(sc->acpi_dev,
255 "AcpiEnterSleepState failed - %s\n",
256 AcpiFormatException(status));
257 ret = -1;
258 goto out;
259 }
260
261 for (;;) ;
262 } else {
263 /* Execute Wakeup */
264 intr_resume();
265
266 if (bootverbose) {
267 acpi_savecpu();
268 acpi_printcpu();
269 }
270 }
271
272 out:
273 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
274 load_cr3(cr3);
275 write_eflags(ef);
276
277 return (ret);
278 }
279
280 static bus_dma_tag_t acpi_waketag;
281 static bus_dmamap_t acpi_wakemap;
282 static vm_offset_t acpi_wakeaddr = 0;
283
284 static void
285 acpi_alloc_wakeup_handler(void)
286 {
287 void *wakeaddr;
288
289 if (!cold)
290 return;
291
292 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
293 /* lowaddr below 1MB */ 0x9ffff,
294 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
295 PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex,
296 &Giant, &acpi_waketag) != 0) {
297 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
298 return;
299 }
300 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr,
301 BUS_DMA_NOWAIT, &acpi_wakemap)) {
302 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
303 return;
304 }
305 acpi_wakeaddr = (vm_offset_t)wakeaddr;
306 }
307
308 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
309
310 static void
311 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
312 {
313 struct acpi_softc *sc = arg;
314 uint32_t *addr;
315
316 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
317 *addr = segs[0].ds_addr + wakeup_32;
318 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
319 sc->acpi_wakephys = segs[0].ds_addr;
320 }
321
322 void
323 acpi_install_wakeup_handler(struct acpi_softc *sc)
324 {
325 if (acpi_wakeaddr == 0)
326 return;
327
328 sc->acpi_waketag = acpi_waketag;
329 sc->acpi_wakeaddr = acpi_wakeaddr;
330 sc->acpi_wakemap = acpi_wakemap;
331
332 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
333 (void *)sc->acpi_wakeaddr, PAGE_SIZE,
334 acpi_realmodeinst, sc, 0);
335 }
Cache object: 8c39087c963b47fb047d172650e76fa6
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