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/5.4/sys/i386/acpica/acpi_wakeup.c 134194 2004-08-23 05:14:18Z njl $");
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 "acpi.h"
51 #include <dev/acpica/acpivar.h>
52
53 #include "acpi_wakecode.h"
54
55 extern uint32_t acpi_reset_video;
56 extern void initializecpu(void);
57
58 static struct region_descriptor r_idt, r_gdt, *p_gdt;
59 static uint16_t r_ldt;
60
61 static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
62 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
63
64 static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
65 static uint32_t r_esp = 0;
66
67 static void acpi_printcpu(void);
68 static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
69 int nsegs, int error);
70 static void acpi_alloc_wakeup_handler(void);
71
72 /* XXX shut gcc up */
73 extern int acpi_savecpu(void);
74 extern int acpi_restorecpu(void);
75
76 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
77 __asm__(" \n\
78 .text \n\
79 .p2align 2, 0x90 \n\
80 .type acpi_restorecpu, @function\n\
81 acpi_restorecpu: \n\
82 .align 4 \n\
83 movl r_eax,%eax \n\
84 movl r_ebx,%ebx \n\
85 movl r_ecx,%ecx \n\
86 movl r_edx,%edx \n\
87 movl r_ebp,%ebp \n\
88 movl r_esi,%esi \n\
89 movl r_edi,%edi \n\
90 movl r_esp,%esp \n\
91 \n\
92 pushl r_efl \n\
93 popfl \n\
94 \n\
95 movl ret_addr,%eax \n\
96 movl %eax,(%esp) \n\
97 xorl %eax,%eax \n\
98 ret \n\
99 \n\
100 .text \n\
101 .p2align 2, 0x90 \n\
102 .type acpi_savecpu, @function \n\
103 acpi_savecpu: \n\
104 movw %cs,r_cs \n\
105 movw %ds,r_ds \n\
106 movw %es,r_es \n\
107 movw %fs,r_fs \n\
108 movw %gs,r_gs \n\
109 movw %ss,r_ss \n\
110 \n\
111 movl %eax,r_eax \n\
112 movl %ebx,r_ebx \n\
113 movl %ecx,r_ecx \n\
114 movl %edx,r_edx \n\
115 movl %ebp,r_ebp \n\
116 movl %esi,r_esi \n\
117 movl %edi,r_edi \n\
118 \n\
119 movl %cr0,%eax \n\
120 movl %eax,r_cr0 \n\
121 movl %cr2,%eax \n\
122 movl %eax,r_cr2 \n\
123 movl %cr3,%eax \n\
124 movl %eax,r_cr3 \n\
125 movl %cr4,%eax \n\
126 movl %eax,r_cr4 \n\
127 \n\
128 pushfl \n\
129 popl r_efl \n\
130 \n\
131 movl %esp,r_esp \n\
132 \n\
133 sgdt r_gdt \n\
134 sidt r_idt \n\
135 sldt r_ldt \n\
136 str r_tr \n\
137 \n\
138 movl (%esp),%eax \n\
139 movl %eax,ret_addr \n\
140 movl $1,%eax \n\
141 ret \n\
142 ");
143 #endif /* __GNUC__ || __INTEL_COMPILER */
144
145 static void
146 acpi_printcpu(void)
147 {
148 printf("======== acpi_printcpu() debug dump ========\n");
149 printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
150 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
151 r_ldt, r_tr, r_efl);
152 printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
153 r_eax, r_ebx, r_ecx, r_edx);
154 printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
155 r_esi, r_edi, r_ebp, r_esp);
156 printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
157 r_cr0, r_cr2, r_cr3, r_cr4);
158 printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
159 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
160 }
161
162 #define WAKECODE_FIXUP(offset, type, val) do { \
163 type *addr; \
164 addr = (type *)(sc->acpi_wakeaddr + offset); \
165 *addr = val; \
166 } while (0)
167
168 #define WAKECODE_BCOPY(offset, type, val) do { \
169 void *addr; \
170 addr = (void *)(sc->acpi_wakeaddr + offset); \
171 bcopy(&(val), addr, sizeof(type)); \
172 } while (0)
173
174 int
175 acpi_sleep_machdep(struct acpi_softc *sc, int state)
176 {
177 ACPI_STATUS status;
178 struct pmap *pm;
179 vm_page_t page;
180 int ret;
181 uint32_t cr3;
182 u_long ef;
183 struct proc *p;
184
185 ret = 0;
186 if (sc->acpi_wakeaddr == 0)
187 return (0);
188
189 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
190
191 ef = read_eflags();
192
193 /* Create Identity Mapping */
194 if ((p = curproc) == NULL)
195 p = &proc0;
196 pm = vmspace_pmap(p->p_vmspace);
197 cr3 = rcr3();
198 #ifdef PAE
199 load_cr3(vtophys(pm->pm_pdpt));
200 #else
201 load_cr3(vtophys(pm->pm_pdir));
202 #endif
203
204 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
205 pmap_enter(pm, sc->acpi_wakephys, page,
206 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
207
208 ret_addr = 0;
209 ACPI_DISABLE_IRQS();
210 if (acpi_savecpu()) {
211 /* Execute Sleep */
212 intr_suspend();
213
214 p_gdt = (struct region_descriptor *)
215 (sc->acpi_wakeaddr + physical_gdt);
216 p_gdt->rd_limit = r_gdt.rd_limit;
217 p_gdt->rd_base = vtophys(r_gdt.rd_base);
218
219 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
220 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
221 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
222 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
223 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
224
225 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
226
227 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
228 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
229 WAKECODE_FIXUP(previous_ldt, uint16_t, r_ldt);
230 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
231
232 WAKECODE_FIXUP(where_to_recover, void *, acpi_restorecpu);
233
234 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
235 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
236 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
237 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
238 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
239
240 if (bootverbose)
241 acpi_printcpu();
242
243 /* Call ACPICA to enter the desired sleep state */
244 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
245 status = AcpiEnterSleepStateS4bios();
246 else
247 status = AcpiEnterSleepState(state);
248
249 if (status != AE_OK) {
250 device_printf(sc->acpi_dev,
251 "AcpiEnterSleepState failed - %s\n",
252 AcpiFormatException(status));
253 ret = -1;
254 goto out;
255 }
256
257 for (;;) ;
258 } else {
259 /* Execute Wakeup */
260 intr_resume();
261
262 if (bootverbose) {
263 acpi_savecpu();
264 acpi_printcpu();
265 }
266 }
267
268 out:
269 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
270 load_cr3(cr3);
271 write_eflags(ef);
272
273 return (ret);
274 }
275
276 static bus_dma_tag_t acpi_waketag;
277 static bus_dmamap_t acpi_wakemap;
278 static vm_offset_t acpi_wakeaddr = 0;
279
280 static void
281 acpi_alloc_wakeup_handler(void)
282 {
283 void *wakeaddr;
284
285 if (!cold)
286 return;
287
288 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
289 /* lowaddr below 1MB */ 0x9ffff,
290 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
291 PAGE_SIZE, 1, PAGE_SIZE, 0, busdma_lock_mutex,
292 &Giant, &acpi_waketag) != 0) {
293 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
294 return;
295 }
296 if (bus_dmamem_alloc(acpi_waketag, &wakeaddr,
297 BUS_DMA_NOWAIT, &acpi_wakemap)) {
298 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
299 return;
300 }
301 acpi_wakeaddr = (vm_offset_t)wakeaddr;
302 }
303
304 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
305
306 static void
307 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
308 {
309 struct acpi_softc *sc = arg;
310 uint32_t *addr;
311
312 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
313 *addr = segs[0].ds_addr + wakeup_32;
314 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
315 sc->acpi_wakephys = segs[0].ds_addr;
316 }
317
318 void
319 acpi_install_wakeup_handler(struct acpi_softc *sc)
320 {
321 if (acpi_wakeaddr == 0)
322 return;
323
324 sc->acpi_waketag = acpi_waketag;
325 sc->acpi_wakeaddr = acpi_wakeaddr;
326 sc->acpi_wakemap = acpi_wakemap;
327
328 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
329 (void *)sc->acpi_wakeaddr, PAGE_SIZE,
330 acpi_realmodeinst, sc, 0);
331 }
Cache object: b5126d8aef4e294bfc008b1f70ee6c5f
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