acpi_wakeup.c revision 114977 
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/i386/acpica/acpi_wakeup.c 114977 2003-05-13 16:59:46Z jhb $
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/proc.h>
36#include <sys/sysctl.h>
37
38#include <vm/vm.h>
39#include <vm/vm_param.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#include <vm/vm_kern.h>
45#include <vm/vm_extern.h>
46
47#include <machine/bus.h>
48#include <machine/cpufunc.h>
49#include <machine/segments.h>
50
51#include <i386/isa/intr_machdep.h>
52
53#include "acpi.h"
54
55#include <dev/acpica/acpica_support.h>
56
57#include <dev/acpica/acpivar.h>
58
59#include "acpi_wakecode.h"
60
61#if __FreeBSD_version < 500000
62#define	vm_page_lock_queues()
63#define	vm_page_unlock_queues()
64#endif
65
66extern void initializecpu(void);
67
68static struct region_descriptor	r_idt, r_gdt, *p_gdt;
69static u_int16_t	r_ldt;
70
71static u_int32_t	r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
72			r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
73
74static u_int16_t	r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
75static u_int32_t	r_esp = 0;
76
77static void		acpi_printcpu(void);
78static void		acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
79					  int nsegs, int error);
80static void		acpi_alloc_wakeup_handler(void);
81
82/* XXX shut gcc up */
83extern int		acpi_savecpu(void);
84extern int		acpi_restorecpu(void);
85
86#ifdef __GNUC__
87__asm__("				\n\
88	.text				\n\
89	.p2align 2, 0x90		\n\
90	.type acpi_restorecpu, @function\n\
91acpi_restorecpu:			\n\
92	.align 4			\n\
93	movl	r_eax,%eax		\n\
94	movl	r_ebx,%ebx		\n\
95	movl	r_ecx,%ecx		\n\
96	movl	r_edx,%edx		\n\
97	movl	r_ebp,%ebp		\n\
98	movl	r_esi,%esi		\n\
99	movl	r_edi,%edi		\n\
100	movl	r_esp,%esp		\n\
101					\n\
102	pushl	r_efl			\n\
103	popfl				\n\
104					\n\
105	movl	ret_addr,%eax		\n\
106	movl	%eax,(%esp)		\n\
107	xorl	%eax,%eax		\n\
108	ret				\n\
109					\n\
110	.text				\n\
111	.p2align 2, 0x90		\n\
112	.type acpi_savecpu, @function	\n\
113acpi_savecpu:				\n\
114	movw	%cs,r_cs		\n\
115	movw	%ds,r_ds		\n\
116	movw	%es,r_es		\n\
117	movw	%fs,r_fs		\n\
118	movw	%gs,r_gs		\n\
119	movw	%ss,r_ss		\n\
120					\n\
121	movl	%eax,r_eax		\n\
122	movl	%ebx,r_ebx		\n\
123	movl	%ecx,r_ecx		\n\
124	movl	%edx,r_edx		\n\
125	movl	%ebp,r_ebp		\n\
126	movl	%esi,r_esi		\n\
127	movl	%edi,r_edi		\n\
128					\n\
129	movl	%cr0,%eax		\n\
130	movl	%eax,r_cr0		\n\
131	movl	%cr2,%eax		\n\
132	movl	%eax,r_cr2		\n\
133	movl	%cr3,%eax		\n\
134	movl	%eax,r_cr3		\n\
135	movl	%cr4,%eax		\n\
136	movl	%eax,r_cr4		\n\
137					\n\
138	pushfl				\n\
139	popl	r_efl			\n\
140					\n\
141	movl	%esp,r_esp		\n\
142					\n\
143	sgdt	r_gdt			\n\
144	sidt	r_idt			\n\
145	sldt	r_ldt			\n\
146	str	r_tr			\n\
147					\n\
148	movl	(%esp),%eax		\n\
149	movl	%eax,ret_addr		\n\
150	movl	$1,%eax			\n\
151	ret				\n\
152");
153#endif /* __GNUC__ */
154
155static void
156acpi_printcpu(void)
157{
158
159	printf("======== acpi_printcpu() debug dump ========\n");
160	printf("gdt[%04x:%08x] idt[%04x:%08x] ldt[%04x] tr[%04x] efl[%08x]\n",
161		r_gdt.rd_limit, r_gdt.rd_base, r_idt.rd_limit, r_idt.rd_base,
162		r_ldt, r_tr, r_efl);
163	printf("eax[%08x] ebx[%08x] ecx[%08x] edx[%08x]\n",
164		r_eax, r_ebx, r_ecx, r_edx);
165	printf("esi[%08x] edi[%08x] ebp[%08x] esp[%08x]\n",
166		r_esi, r_edi, r_ebp, r_esp);
167	printf("cr0[%08x] cr2[%08x] cr3[%08x] cr4[%08x]\n",
168		r_cr0, r_cr2, r_cr3, r_cr4);
169	printf("cs[%04x] ds[%04x] es[%04x] fs[%04x] gs[%04x] ss[%04x]\n",
170		r_cs, r_ds, r_es, r_fs, r_gs, r_ss);
171}
172
173#define WAKECODE_FIXUP(offset, type, val) do	{		\
174	void	**addr;						\
175	addr = (void **)(sc->acpi_wakeaddr + offset);		\
176	(type *)*addr = val;					\
177} while (0)
178
179#define WAKECODE_BCOPY(offset, type, val) do	{		\
180	void	**addr;						\
181	addr = (void **)(sc->acpi_wakeaddr + offset);		\
182	bcopy(&(val), addr, sizeof(type));			\
183} while (0)
184
185int
186acpi_sleep_machdep(struct acpi_softc *sc, int state)
187{
188	ACPI_STATUS		status;
189	vm_paddr_t		oldphys;
190	struct pmap		*pm;
191	vm_page_t		page;
192	static vm_page_t	opage = NULL;
193	int			ret = 0;
194	int			pteobj_allocated = 0;
195	u_long			ef;
196	struct proc		*p;
197
198	if (sc->acpi_wakeaddr == 0) {
199		return (0);
200	}
201
202	AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
203
204	ef = read_eflags();
205	disable_intr();
206
207	/* Create Identity Mapping */
208	if ((p = curproc) == NULL)
209		p = &proc0;
210	pm = vmspace_pmap(p->p_vmspace);
211	if (pm->pm_pteobj == NULL) {
212		pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
213		pteobj_allocated = 1;
214	}
215
216	oldphys = pmap_extract(pm, sc->acpi_wakephys);
217	if (oldphys) {
218		opage = PHYS_TO_VM_PAGE(oldphys);
219	}
220	page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
221	pmap_enter(pm, sc->acpi_wakephys, page,
222		   VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
223
224	ret_addr = 0;
225	if (acpi_savecpu()) {
226		/* Execute Sleep */
227		p_gdt = (struct region_descriptor *)(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(previous_tr,  u_int16_t, r_tr);
238		WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
239		WAKECODE_FIXUP(previous_ldt, u_int16_t, r_ldt);
240		WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
241
242		WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu);
243
244		WAKECODE_FIXUP(previous_ds,  u_int16_t, r_ds);
245		WAKECODE_FIXUP(previous_es,  u_int16_t, r_es);
246		WAKECODE_FIXUP(previous_fs,  u_int16_t, r_fs);
247		WAKECODE_FIXUP(previous_gs,  u_int16_t, r_gs);
248		WAKECODE_FIXUP(previous_ss,  u_int16_t, r_ss);
249
250		if (acpi_get_verbose(sc)) {
251			acpi_printcpu();
252		}
253
254		wbinvd();
255
256		if (state == ACPI_STATE_S4 && sc->acpi_s4bios) {
257			status = AcpiEnterSleepStateS4Bios();
258		} else {
259			status = AcpiEnterSleepState(state);
260		}
261
262		if (status != AE_OK) {
263			device_printf(sc->acpi_dev,
264				"AcpiEnterSleepState failed - %s\n",
265				AcpiFormatException(status));
266			ret = -1;
267			goto out;
268		}
269
270		for (;;) ;
271	} else {
272		/* Execute Wakeup */
273#if 0
274		initializecpu();
275#endif
276		icu_reinit();
277
278		if (acpi_get_verbose(sc)) {
279			acpi_savecpu();
280			acpi_printcpu();
281		}
282	}
283
284out:
285	vm_page_lock_queues();
286	pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
287	vm_page_unlock_queues();
288	if (opage) {
289		pmap_enter(pm, sc->acpi_wakephys, page,
290			   VM_PROT_READ | VM_PROT_WRITE, 0);
291	}
292
293	if (pteobj_allocated) {
294		vm_object_deallocate(pm->pm_pteobj);
295		pm->pm_pteobj = NULL;
296	}
297
298	write_eflags(ef);
299
300	return (ret);
301}
302
303static bus_dma_tag_t	acpi_waketag;
304static bus_dmamap_t	acpi_wakemap;
305static vm_offset_t	acpi_wakeaddr = 0;
306
307static void
308acpi_alloc_wakeup_handler(void)
309{
310
311	if (!cold)
312		return;
313
314	if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
315			       /* lowaddr below 1MB */ 0x9ffff,
316			       /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
317				PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
318		printf("acpi_alloc_wakeup_handler: unable to create wake tag\n");
319		return;
320	}
321
322	if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
323			     BUS_DMA_NOWAIT, &acpi_wakemap)) {
324		printf("acpi_alloc_wakeup_handler: unable to allocate wake memory\n");
325		return;
326	}
327}
328
329SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
330
331static void
332acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
333{
334	struct acpi_softc	*sc = arg;
335	u_int32_t		*addr;
336
337	addr = (u_int32_t *)&wakecode[wakeup_sw32 + 2];
338	*addr = segs[0].ds_addr + wakeup_32;
339	bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
340	sc->acpi_wakephys = segs[0].ds_addr;
341}
342
343void
344acpi_install_wakeup_handler(struct acpi_softc *sc)
345{
346
347	if (acpi_wakeaddr == 0) {
348		return;
349	}
350
351	sc->acpi_waketag = acpi_waketag;
352	sc->acpi_wakeaddr = acpi_wakeaddr;
353	sc->acpi_wakemap = acpi_wakemap;
354
355	bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
356			(void *)sc->acpi_wakeaddr, PAGE_SIZE,
357			acpi_realmodeinst, sc, 0);
358}
359
360