Some laptops return other values for working toucpads. Allow test_aux_port to
[dragonfly.git] / sys / i386 / acpica / acpi_wakeup.c
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  * $DragonFly: src/sys/i386/acpica/Attic/acpi_wakeup.c,v 1.2 2004/02/12 23:33:26 joerg Exp $
27  */
28
29 #include <sys/cdefs.h>
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/segments.h>
51
52 #include <i386/isa/intr_machdep.h>
53
54 #include "acpi.h"
55
56 #include <dev/acpica/acpica_support.h>
57
58 #include <dev/acpica/acpivar.h>
59
60 #include "acpi_wakecode.h"
61
62 #if defined(__DragonFly__) || __FreeBSD_version < 500000
63 #define vm_page_lock_queues()
64 #define vm_page_unlock_queues()
65 #endif
66
67 extern void initializecpu(void);
68
69 static struct region_descriptor r_idt, r_gdt, *p_gdt;
70 static u_int16_t        r_ldt;
71
72 static u_int32_t        r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
73                         r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
74
75 static u_int16_t        r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
76 static u_int32_t        r_esp = 0;
77
78 static void             acpi_printcpu(void);
79 static void             acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
80                                           int nsegs, int error);
81 static void             acpi_alloc_wakeup_handler(void);
82
83 /* XXX shut gcc up */
84 extern int              acpi_savecpu(void);
85 extern int              acpi_restorecpu(void);
86
87 #ifdef __GNUC__
88 __asm__("                               \n\
89         .text                           \n\
90         .p2align 2, 0x90                \n\
91         .type acpi_restorecpu, @function\n\
92 acpi_restorecpu:                        \n\
93         .align 4                        \n\
94         movl    r_eax,%eax              \n\
95         movl    r_ebx,%ebx              \n\
96         movl    r_ecx,%ecx              \n\
97         movl    r_edx,%edx              \n\
98         movl    r_ebp,%ebp              \n\
99         movl    r_esi,%esi              \n\
100         movl    r_edi,%edi              \n\
101         movl    r_esp,%esp              \n\
102                                         \n\
103         pushl   r_efl                   \n\
104         popfl                           \n\
105                                         \n\
106         movl    ret_addr,%eax           \n\
107         movl    %eax,(%esp)             \n\
108         xorl    %eax,%eax               \n\
109         ret                             \n\
110                                         \n\
111         .text                           \n\
112         .p2align 2, 0x90                \n\
113         .type acpi_savecpu, @function   \n\
114 acpi_savecpu:                           \n\
115         movw    %cs,r_cs                \n\
116         movw    %ds,r_ds                \n\
117         movw    %es,r_es                \n\
118         movw    %fs,r_fs                \n\
119         movw    %gs,r_gs                \n\
120         movw    %ss,r_ss                \n\
121                                         \n\
122         movl    %eax,r_eax              \n\
123         movl    %ebx,r_ebx              \n\
124         movl    %ecx,r_ecx              \n\
125         movl    %edx,r_edx              \n\
126         movl    %ebp,r_ebp              \n\
127         movl    %esi,r_esi              \n\
128         movl    %edi,r_edi              \n\
129                                         \n\
130         movl    %cr0,%eax               \n\
131         movl    %eax,r_cr0              \n\
132         movl    %cr2,%eax               \n\
133         movl    %eax,r_cr2              \n\
134         movl    %cr3,%eax               \n\
135         movl    %eax,r_cr3              \n\
136         movl    %cr4,%eax               \n\
137         movl    %eax,r_cr4              \n\
138                                         \n\
139         pushfl                          \n\
140         popl    r_efl                   \n\
141                                         \n\
142         movl    %esp,r_esp              \n\
143                                         \n\
144         sgdt    r_gdt                   \n\
145         sidt    r_idt                   \n\
146         sldt    r_ldt                   \n\
147         str     r_tr                    \n\
148                                         \n\
149         movl    (%esp),%eax             \n\
150         movl    %eax,ret_addr           \n\
151         movl    $1,%eax                 \n\
152         ret                             \n\
153 ");
154 #endif /* __GNUC__ */
155
156 static void
157 acpi_printcpu(void)
158 {
159
160         printf("======== acpi_printcpu() debug dump ========\n");
161         printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
162                 r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
163                 r_ldt, r_tr, r_efl);
164         printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
165                 r_eax, r_ebx, r_ecx, r_edx);
166         printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
167                 r_esi, r_edi, r_ebp, r_esp);
168         printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
169                 r_cr0, r_cr2, r_cr3, r_cr4);
170         printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
171                 r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
172 }
173
174 #define WAKECODE_FIXUP(offset, type, val) do    {               \
175         void    **addr;                                         \
176         addr = (void **)(sc->acpi_wakeaddr + offset);           \
177         (type *)*addr = val;                                    \
178 } while (0)
179
180 #define WAKECODE_BCOPY(offset, type, val) do    {               \
181         void    **addr;                                         \
182         addr = (void **)(sc->acpi_wakeaddr + offset);           \
183         bcopy(&(val), addr, sizeof(type));                      \
184 } while (0)
185
186 int
187 acpi_sleep_machdep(struct acpi_softc *sc, int state)
188 {
189         ACPI_STATUS             status;
190         vm_paddr_t              oldphys;
191         struct pmap             *pm;
192         vm_page_t               page;
193         static vm_page_t        opage = NULL;
194         int                     ret = 0;
195         int                     pteobj_allocated = 0;
196         u_long                  ef;
197         struct proc             *p;
198
199         if (sc->acpi_wakeaddr == 0) {
200                 return (0);
201         }
202
203         AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
204
205         ef = read_eflags();
206         cpu_disable_intr();
207
208         /* Create Identity Mapping */
209         if ((p = curproc) == NULL)
210                 p = &proc0;
211         pm = vmspace_pmap(p->p_vmspace);
212         if (pm->pm_pteobj == NULL) {
213                 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
214                 pteobj_allocated = 1;
215         }
216
217         oldphys = pmap_extract(pm, sc->acpi_wakephys);
218         if (oldphys) {
219                 opage = PHYS_TO_VM_PAGE(oldphys);
220         }
221         page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
222         pmap_enter(pm, sc->acpi_wakephys, page,
223                    VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
224
225         ret_addr = 0;
226         if (acpi_savecpu()) {
227                 /* Execute Sleep */
228                 p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt);
229                 p_gdt->rd_limit = r_gdt.rd_limit;
230                 p_gdt->rd_base = vtophys(r_gdt.rd_base);
231
232                 WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp));
233                 WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0);
234                 WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2);
235                 WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3);
236                 WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4);
237
238                 WAKECODE_FIXUP(previous_tr,  u_int16_t, r_tr);
239                 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
240                 WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt);
241                 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
242
243                 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu);
244
245                 WAKECODE_FIXUP(previous_ds,  u_int16_t, r_ds);
246                 WAKECODE_FIXUP(previous_es,  u_int16_t, r_es);
247                 WAKECODE_FIXUP(previous_fs,  u_int16_t, r_fs);
248                 WAKECODE_FIXUP(previous_gs,  u_int16_t, r_gs);
249                 WAKECODE_FIXUP(previous_ss,  u_int16_t, r_ss);
250
251                 if (acpi_get_verbose(sc)) {
252                         acpi_printcpu();
253                 }
254
255                 wbinvd(); 
256
257                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) {
258                         status = AcpiEnterSleepStateS4Bios();
259                 } else {
260                         status = AcpiEnterSleepState(state);
261                 }
262
263                 if (status != AE_OK) {
264                         device_printf(sc->acpi_dev,
265                                 "AcpiEnterSleepState failed - %s\n",
266                                 AcpiFormatException(status));
267                         ret = -1;
268                         goto out;
269                 }
270
271                 for (;;) ;
272         } else {
273                 /* Execute Wakeup */
274 #if 0
275                 initializecpu();
276 #endif
277                 icu_reinit();
278
279                 if (acpi_get_verbose(sc)) {
280                         acpi_savecpu();
281                         acpi_printcpu();
282                 }
283         }
284
285 out:
286         vm_page_lock_queues();
287         pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
288         vm_page_unlock_queues();
289         if (opage) {
290                 pmap_enter(pm, sc->acpi_wakephys, page,
291                            VM_PROT_READ | VM_PROT_WRITE, 0);
292         }
293
294         if (pteobj_allocated) {
295                 vm_object_deallocate(pm->pm_pteobj);
296                 pm->pm_pteobj = NULL;
297         }
298
299         write_eflags(ef);
300
301         return (ret);
302 }
303
304 static bus_dma_tag_t    acpi_waketag;
305 static bus_dmamap_t     acpi_wakemap;
306 static vm_offset_t      acpi_wakeaddr = 0;
307
308 static void
309 acpi_alloc_wakeup_handler(void)
310 {
311
312         if (!cold)
313                 return;
314
315         if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
316                                /* lowaddr below 1MB */ 0x9ffff,
317                                /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
318                                 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
319                 printf("acpi_alloc_wakeup_handler: unable to create wake tag\n");
320                 return;
321         }
322
323         if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
324                              BUS_DMA_NOWAIT, &acpi_wakemap)) {
325                 printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n");
326                 return;
327         }
328 }
329
330 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
331
332 static void
333 acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
334 {
335         struct acpi_softc       *sc = arg;
336         u_int32_t               *addr;
337
338         addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2];
339         *addr = segs[0].ds_addr + wakeup_32;
340         bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
341         sc->acpi_wakephys = segs[0].ds_addr;
342 }
343
344 void
345 acpi_install_wakeup_handler(struct acpi_softc *sc)
346 {
347
348         if (acpi_wakeaddr == 0) {
349                 return;
350         }
351
352         sc->acpi_waketag = acpi_waketag;
353         sc->acpi_wakeaddr = acpi_wakeaddr;
354         sc->acpi_wakemap = acpi_wakemap;
355
356         bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
357                         (void *)sc->acpi_wakeaddr, PAGE_SIZE,
358                         acpi_realmodeinst, sc, 0);
359 }
360