Fix lvalue cast.
[dragonfly.git] / sys / i386 / acpica5 / acpi_wakeup.c
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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 *
49e48b8a 27 * $FreeBSD: src/sys/i386/acpica/acpi_wakeup.c,v 1.33 2004/05/06 02:18:58 njl Exp $
d11473fb 28 * $DragonFly: src/sys/i386/acpica5/Attic/acpi_wakeup.c,v 1.6 2005/02/15 19:08:06 joerg Exp $
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29 */
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>
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40#include <vm/pmap.h>
41#include <vm/vm_object.h>
42#include <vm/vm_page.h>
43#include <vm/vm_map.h>
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44
45#include <machine/bus.h>
46#include <machine/cpufunc.h>
47#include <machine/segments.h>
48
49#include "acpi.h"
58c6428b 50#include <dev/acpica5/acpivar.h>
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51
52#include "acpi_wakecode.h"
53
54#if __FreeBSD_version < 500000
55#define vm_page_lock_queues()
56#define vm_page_unlock_queues()
57#endif
58
59extern uint32_t acpi_reset_video;
60extern void initializecpu(void);
61
62static struct region_descriptor r_idt, r_gdt, *p_gdt;
f9d8cd12 63static uint16_t r_ldt;
5ed44076 64
f9d8cd12 65static uint32_t r_eax, r_ebx, r_ecx, r_edx, r_ebp, r_esi, r_edi,
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66 r_efl, r_cr0, r_cr2, r_cr3, r_cr4, ret_addr;
67
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68static uint16_t r_cs, r_ds, r_es, r_fs, r_gs, r_ss, r_tr;
69static uint32_t r_esp = 0;
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70
71static void acpi_printcpu(void);
72static void acpi_realmodeinst(void *arg, bus_dma_segment_t *segs,
73 int nsegs, int error);
74static void acpi_alloc_wakeup_handler(void);
75
76/* XXX shut gcc up */
77extern int acpi_savecpu(void);
78extern int acpi_restorecpu(void);
79
f9d8cd12 80#if defined(__GNUC__) || defined(__INTEL_COMPILER)
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81__asm__(" \n\
82 .text \n\
83 .p2align 2, 0x90 \n\
84 .type acpi_restorecpu, @function\n\
85acpi_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\
107acpi_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");
f9d8cd12 147#endif /* __GNUC__ || __INTEL_COMPILER */
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148
149static void
150acpi_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 { \
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167 type *addr; \
168 addr = (type *)(sc->acpi_wakeaddr + offset); \
169 *addr = val; \
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170} while (0)
171
172#define WAKECODE_BCOPY(offset, type, val) do { \
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173 void *addr; \
174 addr = (void *)(sc->acpi_wakeaddr + offset); \
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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_paddr_t oldphys;
183 struct pmap *pm;
184 vm_page_t page;
185 static vm_page_t opage = NULL;
186 int ret = 0;
8ee795b8 187 int pteobj_allocated = 0;
f9d8cd12 188 uint32_t cr3;
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189 u_long ef;
190 struct proc *p;
191
192 if (sc->acpi_wakeaddr == 0)
193 return (0);
194
195 AcpiSetFirmwareWakingVector(sc->acpi_wakephys);
196
197 ef = read_eflags();
198 ACPI_DISABLE_IRQS();
199
200 /* Create Identity Mapping */
201 if ((p = curproc) == NULL)
202 p = &proc0;
203 pm = vmspace_pmap(p->p_vmspace);
204 cr3 = rcr3();
205#ifdef PAE
206 load_cr3(vtophys(pm->pm_pdpt));
207#else
208 load_cr3(vtophys(pm->pm_pdir));
209#endif
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210 /*
211 * note: DragonFly still uses the VM object (FreeBSD-5 no longer uses
212 * the VM object).
213 */
214 if (pm->pm_pteobj == NULL) {
215 pm->pm_pteobj = vm_object_allocate(OBJT_DEFAULT, PTDPTDI + 1);
216 pteobj_allocated = 1;
217 }
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218
219 oldphys = pmap_extract(pm, sc->acpi_wakephys);
220 if (oldphys)
221 opage = PHYS_TO_VM_PAGE(oldphys);
222 page = PHYS_TO_VM_PAGE(sc->acpi_wakephys);
223 pmap_enter(pm, sc->acpi_wakephys, page,
224 VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE, 1);
225
226 ret_addr = 0;
227 if (acpi_savecpu()) {
228 /* Execute Sleep */
229 cpu_disable_intr();
230
231 p_gdt = (struct region_descriptor *)
232 (sc->acpi_wakeaddr + physical_gdt);
233 p_gdt->rd_limit = r_gdt.rd_limit;
234 p_gdt->rd_base = vtophys(r_gdt.rd_base);
235
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236 WAKECODE_FIXUP(physical_esp, uint32_t, vtophys(r_esp));
237 WAKECODE_FIXUP(previous_cr0, uint32_t, r_cr0);
238 WAKECODE_FIXUP(previous_cr2, uint32_t, r_cr2);
239 WAKECODE_FIXUP(previous_cr3, uint32_t, r_cr3);
240 WAKECODE_FIXUP(previous_cr4, uint32_t, r_cr4);
5ed44076 241
f9d8cd12 242 WAKECODE_FIXUP(reset_video, uint32_t, acpi_reset_video);
5ed44076 243
f9d8cd12 244 WAKECODE_FIXUP(previous_tr, uint16_t, r_tr);
5ed44076 245 WAKECODE_BCOPY(previous_gdt, struct region_descriptor, r_gdt);
f9d8cd12 246 WAKECODE_FIXUP(previous_ldt, uint16_t, r_ldt);
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247 WAKECODE_BCOPY(previous_idt, struct region_descriptor, r_idt);
248
249 WAKECODE_FIXUP(where_to_recover, void, acpi_restorecpu);
250
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251 WAKECODE_FIXUP(previous_ds, uint16_t, r_ds);
252 WAKECODE_FIXUP(previous_es, uint16_t, r_es);
253 WAKECODE_FIXUP(previous_fs, uint16_t, r_fs);
254 WAKECODE_FIXUP(previous_gs, uint16_t, r_gs);
255 WAKECODE_FIXUP(previous_ss, uint16_t, r_ss);
5ed44076 256
f9d8cd12 257 if (bootverbose)
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258 acpi_printcpu();
259
260 /* Call ACPICA to enter the desired sleep state */
261 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
262 status = AcpiEnterSleepStateS4bios();
263 else
264 status = AcpiEnterSleepState(state);
265
266 if (status != AE_OK) {
267 device_printf(sc->acpi_dev,
268 "AcpiEnterSleepState failed - %s\n",
269 AcpiFormatException(status));
270 ret = -1;
271 goto out;
272 }
273
274 for (;;) ;
275 } else {
276 /* Execute Wakeup */
277#if 0
278 initializecpu();
279#endif
280 cpu_enable_intr();
281
f9d8cd12 282 if (bootverbose) {
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283 acpi_savecpu();
284 acpi_printcpu();
285 }
286 }
287
288out:
289 vm_page_lock_queues();
290 pmap_remove(pm, sc->acpi_wakephys, sc->acpi_wakephys + PAGE_SIZE);
291 vm_page_unlock_queues();
292 if (opage) {
293 pmap_enter(pm, sc->acpi_wakephys, page,
294 VM_PROT_READ | VM_PROT_WRITE, 0);
295 }
296
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297 if (pteobj_allocated) {
298 vm_object_deallocate(pm->pm_pteobj);
299 pm->pm_pteobj = NULL;
300 }
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301 load_cr3(cr3);
302
303 write_eflags(ef);
304
305 return (ret);
306}
307
308static bus_dma_tag_t acpi_waketag;
309static bus_dmamap_t acpi_wakemap;
310static vm_offset_t acpi_wakeaddr = 0;
311
312static void
313acpi_alloc_wakeup_handler(void)
314{
315 if (!cold)
316 return;
317
318 if (bus_dma_tag_create(/* parent */ NULL, /* alignment */ 2, 0,
319 /* lowaddr below 1MB */ 0x9ffff,
320 /* highaddr */ BUS_SPACE_MAXADDR, NULL, NULL,
321 PAGE_SIZE, 1, PAGE_SIZE, 0, &acpi_waketag) != 0) {
322 printf("acpi_alloc_wakeup_handler: can't create wake tag\n");
323 return;
324 }
325
326 if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
327 BUS_DMA_NOWAIT, &acpi_wakemap)) {
328 printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
329 return;
330 }
331}
332
333SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)
334
335static void
336acpi_realmodeinst(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
337{
338 struct acpi_softc *sc = arg;
f9d8cd12 339 uint32_t *addr;
5ed44076 340
f9d8cd12 341 addr = (uint32_t *)&wakecode[wakeup_sw32 + 2];
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342 *addr = segs[0].ds_addr + wakeup_32;
343 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
344 sc->acpi_wakephys = segs[0].ds_addr;
345}
346
347void
348acpi_install_wakeup_handler(struct acpi_softc *sc)
349{
350 if (acpi_wakeaddr == 0)
351 return;
352
353 sc->acpi_waketag = acpi_waketag;
354 sc->acpi_wakeaddr = acpi_wakeaddr;
355 sc->acpi_wakemap = acpi_wakemap;
356
357 bus_dmamap_load(sc->acpi_waketag, sc->acpi_wakemap,
358 (void *)sc->acpi_wakeaddr, PAGE_SIZE,
359 acpi_realmodeinst, sc, 0);
360}