acpi_wakeup.c revision 86554 
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 *      $FreeBSD: head/sys/amd64/acpica/acpi_wakeup.c 86554 2001-11-18 18:48:31Z iwasaki $
28 */
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kernel.h>
33#include <sys/bus.h>
34#include <sys/lock.h>
35#include <sys/mutex.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
62extern void initializecpu(void);
63
64struct region_descriptor	r_idt, r_gdt, *p_gdt;
65static u_int16_t	r_ldt;
66
67static u_int32_t	r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
68			r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
69
70static u_int16_t	r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
71static u_int32_t	r_esp = 0;
72
73static void		acpi_printcpu(void);
74static void		acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
75					  int nsegs, int error);
76static void		acpi_alloc_wakeup_handler(void);
77
78/* XXX shut gcc up */
79extern int		acpi_savecpu(void);
80extern int		acpi_restorecpu(void);
81
82__asm__("
83	.text
84	.p2align 2, 0x90
85	.type acpi_restorecpu, @function
86acpi_restorecpu:
87	.align 4
88	movl	r_eax,%eax
89	movl	r_ebx,%ebx
90	movl	r_ecx,%ecx
91	movl	r_edx,%edx
92	movl	r_ebp,%ebp
93	movl	r_esi,%esi
94	movl	r_edi,%edi
95	movl	r_esp,%esp
96
97	pushl	r_efl
98	popfl
99
100	pushl	ret_addr
101	xorl	%eax,%eax
102	ret
103
104	.text
105	.p2align 2, 0x90
106	.type acpi_savecpu, @function
107acpi_savecpu:
108	movw	%cs,r_cs
109	movw	%ds,r_ds
110	movw	%es,r_es
111	movw	%fs,r_fs
112	movw	%gs,r_gs
113	movw	%ss,r_ss
114
115	movl	%eax,r_eax
116	movl	%ebx,r_ebx
117	movl	%ecx,r_ecx
118	movl	%edx,r_edx
119	movl	%ebp,r_ebp
120	movl	%esi,r_esi
121	movl	%edi,r_edi
122
123	movl	%cr0,%eax
124	movl	%eax,r_cr0
125	movl	%cr2,%eax
126	movl	%eax,r_cr2
127	movl	%cr3,%eax
128	movl	%eax,r_cr3
129	movl	%cr4,%eax
130	movl	%eax,r_cr4
131
132	pushfl
133	popl	r_efl
134
135	movl	%esp,r_esp
136
137	sgdt	r_gdt
138	sidt	r_idt
139	sldt	r_ldt
140	str	r_tr
141
142	movl	(%esp),%eax
143	movl	%eax,ret_addr
144	movl	$1,%eax
145	ret
146");
147
148static void
149acpi_printcpu(void)
150{
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	void	**addr;						\
168	addr = (void **)(sc->acpi_wakeaddr + offset);		\
169	(type *)*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
178int
179acpi_sleep_machdep(struct acpi_softc *sc, int state)
180{
181	ACPI_STATUS		status;
182	vm_offset_t		oldphys;
183	struct pmap		*pm;
184	vm_page_t		page;
185	static vm_page_t	opage = NULL;
186	int			ret = 0;
187	int			pteobj_allocated = 0;
188	u_long			ef;
189
190	if (sc->acpi_wakeaddr == NULL) {
191		return (0);
192	}
193
194	AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
195
196	ef = read_eflags();
197	disable_intr();
198
199	/* Create Identity Mapping */
200	pm = vmspace_pmap(CURPROC->p_vmspace);
201	if (pm->pm_pteobj == NULL) {
202		pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
203		pteobj_allocated = 1;
204	}
205
206	oldphys = pmap_extract(pm, sc->acpi_wakephys);
207	if (oldphys) {
208		opage = PHYS_TO_VM_PAGE(oldphys);
209	}
210	page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
211	pmap_enter(pm, sc->acpi_wakephys, page,
212		   VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
213
214	ret_addr = 0;
215	if (acpi_savecpu()) {
216		/* Execute Sleep */
217		p_gdt = (struct region_descriptor *)(sc->acpi_wakeaddr + physical_gdt);
218		p_gdt->rd_limit = r_gdt.rd_limit;
219		p_gdt->rd_base = vtophys(r_gdt.rd_base);
220
221		WAKECODE_FIXUP(physical_esp, u_int32_t, vtophys(r_esp));
222		WAKECODE_FIXUP(previous_cr0, u_int32_t, r_cr0);
223		WAKECODE_FIXUP(previous_cr2, u_int32_t, r_cr2);
224		WAKECODE_FIXUP(previous_cr3, u_int32_t, r_cr3);
225		WAKECODE_FIXUP(previous_cr4, u_int32_t, r_cr4);
226
227		WAKECODE_FIXUP(previous_tr,  u_int16_t, r_tr);
228		WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
229		WAKECODE_FIXUP(previous_ldt, u_int16_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,  u_int16_t, r_ds);
235		WAKECODE_FIXUP(previous_es,  u_int16_t, r_es);
236		WAKECODE_FIXUP(previous_fs,  u_int16_t, r_fs);
237		WAKECODE_FIXUP(previous_gs,  u_int16_t, r_gs);
238		WAKECODE_FIXUP(previous_ss,  u_int16_t, r_ss);
239
240		if (acpi_get_verbose(sc)) {
241			acpi_printcpu();
242		}
243
244		if (state == ACPI_STATE_S4 && sc->acpi_s4bios) {
245			status = AcpiEnterSleepStateS4Bios();
246		} else {
247			status = AcpiEnterSleepState(state);
248		}
249
250		if (status != AE_OK) {
251			device_printf(sc->acpi_dev,
252				"AcpiEnterSleepState failed - %s\n",
253				AcpiFormatException(status));
254			ret = -1;
255			goto out;
256		}
257		wbinvd();
258
259		for (;;) ;
260	} else {
261		/* Execute Wakeup */
262#if 0
263		initializecpu();
264#endif
265		icu_reinit();
266
267		if (acpi_get_verbose(sc)) {
268			acpi_savecpu();
269			acpi_printcpu();
270		}
271	}
272
273out:
274	pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
275	if (opage) {
276		pmap_enter(pm, sc->acpi_wakephys, page,
277			   VM_PROT_READ | VM_PROT_WRITE, 0);
278	}
279
280	if (pteobj_allocated) {
281		vm_object_deallocate(pm->pm_pteobj);
282		pm->pm_pteobj = NULL;
283	}
284
285	write_eflags(ef);
286
287	return (ret);
288}
289
290static bus_dma_tag_t	acpi_waketag;
291static bus_dmamap_t	acpi_wakemap;
292static vm_offset_t	acpi_wakeaddr = 0;
293
294static void
295acpi_alloc_wakeup_handler(void)
296{
297
298	if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
299			       /* lowaddr below 1MB */ 0x9ffff,
300			       /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
301				PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
302		printf("acpi_alloc_wakeup_handler: unable to create wake tag\n");
303		return;
304	}
305
306	if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
307			     BUS_DMA_NOWAIT, &acpi_wakemap)) {
308		printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n");
309		return;
310	}
311}
312
313SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
314
315static void
316acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
317{
318	struct acpi_softc	*sc = arg;
319	u_int32_t		*addr;
320
321	addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2];
322	*addr = segs[0].ds_addr + wakeup_32;
323	bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
324	sc->acpi_wakephys = segs[0].ds_addr;
325}
326
327void
328acpi_install_wakeup_handler(struct acpi_softc *sc)
329{
330
331	if (acpi_wakeaddr == 0) {
332		return;
333	}
334
335	sc->acpi_waketag = acpi_waketag;
336	sc->acpi_wakeaddr = acpi_wakeaddr;
337	sc->acpi_wakemap = acpi_wakemap;
338
339	bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
340			(void *)sc->acpi_wakeaddr, PAGE_SIZE,
341			acpi_realmodeinst, sc, 0);
342}
343
344