Change pci_raw_ops to pci_raw_read/write
[linux-2.6.git] / drivers / acpi / osl.c
1 /*
2  *  acpi_osl.c - OS-dependent functions ($Revision: 83 $)
3  *
4  *  Copyright (C) 2000       Andrew Henroid
5  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7  *
8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; either version 2 of the License, or
13  *  (at your option) any later version.
14  *
15  *  This program is distributed in the hope that it will be useful,
16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *  GNU General Public License for more details.
19  *
20  *  You should have received a copy of the GNU General Public License
21  *  along with this program; if not, write to the Free Software
22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23  *
24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25  *
26  */
27
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/slab.h>
31 #include <linux/mm.h>
32 #include <linux/pci.h>
33 #include <linux/interrupt.h>
34 #include <linux/kmod.h>
35 #include <linux/delay.h>
36 #include <linux/dmi.h>
37 #include <linux/workqueue.h>
38 #include <linux/nmi.h>
39 #include <linux/acpi.h>
40 #include <acpi/acpi.h>
41 #include <asm/io.h>
42 #include <acpi/acpi_bus.h>
43 #include <acpi/processor.h>
44 #include <asm/uaccess.h>
45
46 #include <linux/efi.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
49
50 #define _COMPONENT              ACPI_OS_SERVICES
51 ACPI_MODULE_NAME("osl");
52 #define PREFIX          "ACPI: "
53 struct acpi_os_dpc {
54         acpi_osd_exec_callback function;
55         void *context;
56         struct work_struct work;
57 };
58
59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
61 #endif
62
63 #ifdef ENABLE_DEBUGGER
64 #include <linux/kdb.h>
65
66 /* stuff for debugger support */
67 int acpi_in_debugger;
68 EXPORT_SYMBOL(acpi_in_debugger);
69
70 extern char line_buf[80];
71 #endif                          /*ENABLE_DEBUGGER */
72
73 static unsigned int acpi_irq_irq;
74 static acpi_osd_handler acpi_irq_handler;
75 static void *acpi_irq_context;
76 static struct workqueue_struct *kacpid_wq;
77 static struct workqueue_struct *kacpi_notify_wq;
78
79 struct acpi_res_list {
80         resource_size_t start;
81         resource_size_t end;
82         acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
83         char name[5];   /* only can have a length of 4 chars, make use of this
84                            one instead of res->name, no need to kalloc then */
85         struct list_head resource_list;
86 };
87
88 static LIST_HEAD(resource_list_head);
89 static DEFINE_SPINLOCK(acpi_res_lock);
90
91 #define OSI_STRING_LENGTH_MAX 64        /* arbitrary */
92 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
93
94 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
95 static int acpi_no_initrd_override;
96 #endif
97
98 /*
99  * "Ode to _OSI(Linux)"
100  *
101  * osi_linux -- Control response to BIOS _OSI(Linux) query.
102  *
103  * As Linux evolves, the features that it supports change.
104  * So an OSI string such as "Linux" is not specific enough
105  * to be useful across multiple versions of Linux.  It
106  * doesn't identify any particular feature, interface,
107  * or even any particular version of Linux...
108  *
109  * Unfortunately, Linux-2.6.22 and earlier responded "yes"
110  * to a BIOS _OSI(Linux) query.  When
111  * a reference mobile BIOS started using it, its use
112  * started to spread to many vendor platforms.
113  * As it is not supportable, we need to halt that spread.
114  *
115  * Today, most BIOS references to _OSI(Linux) are noise --
116  * they have no functional effect and are just dead code
117  * carried over from the reference BIOS.
118  *
119  * The next most common case is that _OSI(Linux) harms Linux,
120  * usually by causing the BIOS to follow paths that are
121  * not tested during Windows validation.
122  *
123  * Finally, there is a short list of platforms
124  * where OSI(Linux) benefits Linux.
125  *
126  * In Linux-2.6.23, OSI(Linux) is first disabled by default.
127  * DMI is used to disable the dmesg warning about OSI(Linux)
128  * on platforms where it is known to have no effect.
129  * But a dmesg warning remains for systems where
130  * we do not know if OSI(Linux) is good or bad for the system.
131  * DMI is also used to enable OSI(Linux) for the machines
132  * that are known to need it.
133  *
134  * BIOS writers should NOT query _OSI(Linux) on future systems.
135  * It will be ignored by default, and to get Linux to
136  * not ignore it will require a kernel source update to
137  * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
138  */
139 #define OSI_LINUX_ENABLE 0
140
141 static struct osi_linux {
142         unsigned int    enable:1;
143         unsigned int    dmi:1;
144         unsigned int    cmdline:1;
145         unsigned int    known:1;
146 } osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0};
147
148 static void __init acpi_request_region (struct acpi_generic_address *addr,
149         unsigned int length, char *desc)
150 {
151         struct resource *res;
152
153         if (!addr->address || !length)
154                 return;
155
156         if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
157                 res = request_region(addr->address, length, desc);
158         else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
159                 res = request_mem_region(addr->address, length, desc);
160 }
161
162 static int __init acpi_reserve_resources(void)
163 {
164         acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
165                 "ACPI PM1a_EVT_BLK");
166
167         acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
168                 "ACPI PM1b_EVT_BLK");
169
170         acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
171                 "ACPI PM1a_CNT_BLK");
172
173         acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
174                 "ACPI PM1b_CNT_BLK");
175
176         if (acpi_gbl_FADT.pm_timer_length == 4)
177                 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
178
179         acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
180                 "ACPI PM2_CNT_BLK");
181
182         /* Length of GPE blocks must be a non-negative multiple of 2 */
183
184         if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
185                 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
186                                acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
187
188         if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
189                 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
190                                acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
191
192         return 0;
193 }
194 device_initcall(acpi_reserve_resources);
195
196 acpi_status __init acpi_os_initialize(void)
197 {
198         return AE_OK;
199 }
200
201 acpi_status acpi_os_initialize1(void)
202 {
203         kacpid_wq = create_singlethread_workqueue("kacpid");
204         kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
205         BUG_ON(!kacpid_wq);
206         BUG_ON(!kacpi_notify_wq);
207         return AE_OK;
208 }
209
210 acpi_status acpi_os_terminate(void)
211 {
212         if (acpi_irq_handler) {
213                 acpi_os_remove_interrupt_handler(acpi_irq_irq,
214                                                  acpi_irq_handler);
215         }
216
217         destroy_workqueue(kacpid_wq);
218         destroy_workqueue(kacpi_notify_wq);
219
220         return AE_OK;
221 }
222
223 void acpi_os_printf(const char *fmt, ...)
224 {
225         va_list args;
226         va_start(args, fmt);
227         acpi_os_vprintf(fmt, args);
228         va_end(args);
229 }
230
231 void acpi_os_vprintf(const char *fmt, va_list args)
232 {
233         static char buffer[512];
234
235         vsprintf(buffer, fmt, args);
236
237 #ifdef ENABLE_DEBUGGER
238         if (acpi_in_debugger) {
239                 kdb_printf("%s", buffer);
240         } else {
241                 printk("%s", buffer);
242         }
243 #else
244         printk("%s", buffer);
245 #endif
246 }
247
248 acpi_physical_address __init acpi_os_get_root_pointer(void)
249 {
250         if (efi_enabled) {
251                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
252                         return efi.acpi20;
253                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
254                         return efi.acpi;
255                 else {
256                         printk(KERN_ERR PREFIX
257                                "System description tables not found\n");
258                         return 0;
259                 }
260         } else {
261                 acpi_physical_address pa = 0;
262
263                 acpi_find_root_pointer(&pa);
264                 return pa;
265         }
266 }
267
268 void __iomem *__init_refok
269 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
270 {
271         if (phys > ULONG_MAX) {
272                 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
273                 return NULL;
274         }
275         if (acpi_gbl_permanent_mmap)
276                 /*
277                 * ioremap checks to ensure this is in reserved space
278                 */
279                 return ioremap((unsigned long)phys, size);
280         else
281                 return __acpi_map_table((unsigned long)phys, size);
282 }
283 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
284
285 void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
286 {
287         if (acpi_gbl_permanent_mmap) {
288                 iounmap(virt);
289         }
290 }
291 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
292
293 #ifdef ACPI_FUTURE_USAGE
294 acpi_status
295 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
296 {
297         if (!phys || !virt)
298                 return AE_BAD_PARAMETER;
299
300         *phys = virt_to_phys(virt);
301
302         return AE_OK;
303 }
304 #endif
305
306 #define ACPI_MAX_OVERRIDE_LEN 100
307
308 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
309
310 acpi_status
311 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
312                             acpi_string * new_val)
313 {
314         if (!init_val || !new_val)
315                 return AE_BAD_PARAMETER;
316
317         *new_val = NULL;
318         if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
319                 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
320                        acpi_os_name);
321                 *new_val = acpi_os_name;
322         }
323
324         return AE_OK;
325 }
326
327 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
328 struct acpi_table_header *acpi_find_dsdt_initrd(void)
329 {
330         struct file *firmware_file;
331         mm_segment_t oldfs;
332         unsigned long len, len2;
333         struct acpi_table_header *dsdt_buffer, *ret = NULL;
334         struct kstat stat;
335         char *ramfs_dsdt_name = "/DSDT.aml";
336
337         printk(KERN_INFO PREFIX "Checking initramfs for custom DSDT\n");
338
339         /*
340          * Never do this at home, only the user-space is allowed to open a file.
341          * The clean way would be to use the firmware loader.
342          * But this code must be run before there is any userspace available.
343          * A static/init firmware infrastructure doesn't exist yet...
344          */
345         if (vfs_stat(ramfs_dsdt_name, &stat) < 0)
346                 return ret;
347
348         len = stat.size;
349         /* check especially against empty files */
350         if (len <= 4) {
351                 printk(KERN_ERR PREFIX "Failed: DSDT only %lu bytes.\n", len);
352                 return ret;
353         }
354
355         firmware_file = filp_open(ramfs_dsdt_name, O_RDONLY, 0);
356         if (IS_ERR(firmware_file)) {
357                 printk(KERN_ERR PREFIX "Failed to open %s.\n", ramfs_dsdt_name);
358                 return ret;
359         }
360
361         dsdt_buffer = kmalloc(len, GFP_ATOMIC);
362         if (!dsdt_buffer) {
363                 printk(KERN_ERR PREFIX "Failed to allocate %lu bytes.\n", len);
364                 goto err;
365         }
366
367         oldfs = get_fs();
368         set_fs(KERNEL_DS);
369         len2 = vfs_read(firmware_file, (char __user *)dsdt_buffer, len,
370                 &firmware_file->f_pos);
371         set_fs(oldfs);
372         if (len2 < len) {
373                 printk(KERN_ERR PREFIX "Failed to read %lu bytes from %s.\n",
374                         len, ramfs_dsdt_name);
375                 ACPI_FREE(dsdt_buffer);
376                 goto err;
377         }
378
379         printk(KERN_INFO PREFIX "Found %lu byte DSDT in %s.\n",
380                         len, ramfs_dsdt_name);
381         ret = dsdt_buffer;
382 err:
383         filp_close(firmware_file, NULL);
384         return ret;
385 }
386 #endif
387
388 acpi_status
389 acpi_os_table_override(struct acpi_table_header * existing_table,
390                        struct acpi_table_header ** new_table)
391 {
392         if (!existing_table || !new_table)
393                 return AE_BAD_PARAMETER;
394
395         *new_table = NULL;
396
397 #ifdef CONFIG_ACPI_CUSTOM_DSDT
398         if (strncmp(existing_table->signature, "DSDT", 4) == 0)
399                 *new_table = (struct acpi_table_header *)AmlCode;
400 #endif
401 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
402         if ((strncmp(existing_table->signature, "DSDT", 4) == 0) &&
403             !acpi_no_initrd_override) {
404                 struct acpi_table_header *initrd_table;
405
406                 initrd_table = acpi_find_dsdt_initrd();
407                 if (initrd_table)
408                         *new_table = initrd_table;
409         }
410 #endif
411         if (*new_table != NULL) {
412                 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
413                            "this is unsafe: tainting kernel\n",
414                        existing_table->signature,
415                        existing_table->oem_table_id);
416                 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
417         }
418         return AE_OK;
419 }
420
421 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
422 int __init acpi_no_initrd_override_setup(char *s)
423 {
424         acpi_no_initrd_override = 1;
425         return 1;
426 }
427 __setup("acpi_no_initrd_override", acpi_no_initrd_override_setup);
428 #endif
429
430 static irqreturn_t acpi_irq(int irq, void *dev_id)
431 {
432         u32 handled;
433
434         handled = (*acpi_irq_handler) (acpi_irq_context);
435
436         if (handled) {
437                 acpi_irq_handled++;
438                 return IRQ_HANDLED;
439         } else
440                 return IRQ_NONE;
441 }
442
443 acpi_status
444 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
445                                   void *context)
446 {
447         unsigned int irq;
448
449         acpi_irq_stats_init();
450
451         /*
452          * Ignore the GSI from the core, and use the value in our copy of the
453          * FADT. It may not be the same if an interrupt source override exists
454          * for the SCI.
455          */
456         gsi = acpi_gbl_FADT.sci_interrupt;
457         if (acpi_gsi_to_irq(gsi, &irq) < 0) {
458                 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
459                        gsi);
460                 return AE_OK;
461         }
462
463         acpi_irq_handler = handler;
464         acpi_irq_context = context;
465         if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
466                 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
467                 return AE_NOT_ACQUIRED;
468         }
469         acpi_irq_irq = irq;
470
471         return AE_OK;
472 }
473
474 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
475 {
476         if (irq) {
477                 free_irq(irq, acpi_irq);
478                 acpi_irq_handler = NULL;
479                 acpi_irq_irq = 0;
480         }
481
482         return AE_OK;
483 }
484
485 /*
486  * Running in interpreter thread context, safe to sleep
487  */
488
489 void acpi_os_sleep(acpi_integer ms)
490 {
491         schedule_timeout_interruptible(msecs_to_jiffies(ms));
492 }
493
494 void acpi_os_stall(u32 us)
495 {
496         while (us) {
497                 u32 delay = 1000;
498
499                 if (delay > us)
500                         delay = us;
501                 udelay(delay);
502                 touch_nmi_watchdog();
503                 us -= delay;
504         }
505 }
506
507 /*
508  * Support ACPI 3.0 AML Timer operand
509  * Returns 64-bit free-running, monotonically increasing timer
510  * with 100ns granularity
511  */
512 u64 acpi_os_get_timer(void)
513 {
514         static u64 t;
515
516 #ifdef  CONFIG_HPET
517         /* TBD: use HPET if available */
518 #endif
519
520 #ifdef  CONFIG_X86_PM_TIMER
521         /* TBD: default to PM timer if HPET was not available */
522 #endif
523         if (!t)
524                 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
525
526         return ++t;
527 }
528
529 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
530 {
531         u32 dummy;
532
533         if (!value)
534                 value = &dummy;
535
536         *value = 0;
537         if (width <= 8) {
538                 *(u8 *) value = inb(port);
539         } else if (width <= 16) {
540                 *(u16 *) value = inw(port);
541         } else if (width <= 32) {
542                 *(u32 *) value = inl(port);
543         } else {
544                 BUG();
545         }
546
547         return AE_OK;
548 }
549
550 EXPORT_SYMBOL(acpi_os_read_port);
551
552 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
553 {
554         if (width <= 8) {
555                 outb(value, port);
556         } else if (width <= 16) {
557                 outw(value, port);
558         } else if (width <= 32) {
559                 outl(value, port);
560         } else {
561                 BUG();
562         }
563
564         return AE_OK;
565 }
566
567 EXPORT_SYMBOL(acpi_os_write_port);
568
569 acpi_status
570 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
571 {
572         u32 dummy;
573         void __iomem *virt_addr;
574
575         virt_addr = ioremap(phys_addr, width);
576         if (!value)
577                 value = &dummy;
578
579         switch (width) {
580         case 8:
581                 *(u8 *) value = readb(virt_addr);
582                 break;
583         case 16:
584                 *(u16 *) value = readw(virt_addr);
585                 break;
586         case 32:
587                 *(u32 *) value = readl(virt_addr);
588                 break;
589         default:
590                 BUG();
591         }
592
593         iounmap(virt_addr);
594
595         return AE_OK;
596 }
597
598 acpi_status
599 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
600 {
601         void __iomem *virt_addr;
602
603         virt_addr = ioremap(phys_addr, width);
604
605         switch (width) {
606         case 8:
607                 writeb(value, virt_addr);
608                 break;
609         case 16:
610                 writew(value, virt_addr);
611                 break;
612         case 32:
613                 writel(value, virt_addr);
614                 break;
615         default:
616                 BUG();
617         }
618
619         iounmap(virt_addr);
620
621         return AE_OK;
622 }
623
624 acpi_status
625 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
626                                void *value, u32 width)
627 {
628         int result, size;
629
630         if (!value)
631                 return AE_BAD_PARAMETER;
632
633         switch (width) {
634         case 8:
635                 size = 1;
636                 break;
637         case 16:
638                 size = 2;
639                 break;
640         case 32:
641                 size = 4;
642                 break;
643         default:
644                 return AE_ERROR;
645         }
646
647         result = raw_pci_read(pci_id->segment, pci_id->bus,
648                                 PCI_DEVFN(pci_id->device, pci_id->function),
649                                 reg, size, value);
650
651         return (result ? AE_ERROR : AE_OK);
652 }
653
654 acpi_status
655 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
656                                 acpi_integer value, u32 width)
657 {
658         int result, size;
659
660         switch (width) {
661         case 8:
662                 size = 1;
663                 break;
664         case 16:
665                 size = 2;
666                 break;
667         case 32:
668                 size = 4;
669                 break;
670         default:
671                 return AE_ERROR;
672         }
673
674         result = raw_pci_write(pci_id->segment, pci_id->bus,
675                                 PCI_DEVFN(pci_id->device, pci_id->function),
676                                 reg, size, value);
677
678         return (result ? AE_ERROR : AE_OK);
679 }
680
681 /* TODO: Change code to take advantage of driver model more */
682 static void acpi_os_derive_pci_id_2(acpi_handle rhandle,        /* upper bound  */
683                                     acpi_handle chandle,        /* current node */
684                                     struct acpi_pci_id **id,
685                                     int *is_bridge, u8 * bus_number)
686 {
687         acpi_handle handle;
688         struct acpi_pci_id *pci_id = *id;
689         acpi_status status;
690         unsigned long temp;
691         acpi_object_type type;
692         u8 tu8;
693
694         acpi_get_parent(chandle, &handle);
695         if (handle != rhandle) {
696                 acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
697                                         bus_number);
698
699                 status = acpi_get_type(handle, &type);
700                 if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
701                         return;
702
703                 status =
704                     acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
705                                           &temp);
706                 if (ACPI_SUCCESS(status)) {
707                         pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
708                         pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
709
710                         if (*is_bridge)
711                                 pci_id->bus = *bus_number;
712
713                         /* any nicer way to get bus number of bridge ? */
714                         status =
715                             acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8,
716                                                            8);
717                         if (ACPI_SUCCESS(status)
718                             && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) {
719                                 status =
720                                     acpi_os_read_pci_configuration(pci_id, 0x18,
721                                                                    &tu8, 8);
722                                 if (!ACPI_SUCCESS(status)) {
723                                         /* Certainly broken...  FIX ME */
724                                         return;
725                                 }
726                                 *is_bridge = 1;
727                                 pci_id->bus = tu8;
728                                 status =
729                                     acpi_os_read_pci_configuration(pci_id, 0x19,
730                                                                    &tu8, 8);
731                                 if (ACPI_SUCCESS(status)) {
732                                         *bus_number = tu8;
733                                 }
734                         } else
735                                 *is_bridge = 0;
736                 }
737         }
738 }
739
740 void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound  */
741                            acpi_handle chandle, /* current node */
742                            struct acpi_pci_id **id)
743 {
744         int is_bridge = 1;
745         u8 bus_number = (*id)->bus;
746
747         acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
748 }
749
750 static void acpi_os_execute_deferred(struct work_struct *work)
751 {
752         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
753         if (!dpc) {
754                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
755                 return;
756         }
757
758         dpc->function(dpc->context);
759         kfree(dpc);
760
761         return;
762 }
763
764 /*******************************************************************************
765  *
766  * FUNCTION:    acpi_os_execute
767  *
768  * PARAMETERS:  Type               - Type of the callback
769  *              Function           - Function to be executed
770  *              Context            - Function parameters
771  *
772  * RETURN:      Status
773  *
774  * DESCRIPTION: Depending on type, either queues function for deferred execution or
775  *              immediately executes function on a separate thread.
776  *
777  ******************************************************************************/
778
779 acpi_status acpi_os_execute(acpi_execute_type type,
780                             acpi_osd_exec_callback function, void *context)
781 {
782         acpi_status status = AE_OK;
783         struct acpi_os_dpc *dpc;
784         struct workqueue_struct *queue;
785         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
786                           "Scheduling function [%p(%p)] for deferred execution.\n",
787                           function, context));
788
789         if (!function)
790                 return AE_BAD_PARAMETER;
791
792         /*
793          * Allocate/initialize DPC structure.  Note that this memory will be
794          * freed by the callee.  The kernel handles the work_struct list  in a
795          * way that allows us to also free its memory inside the callee.
796          * Because we may want to schedule several tasks with different
797          * parameters we can't use the approach some kernel code uses of
798          * having a static work_struct.
799          */
800
801         dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
802         if (!dpc)
803                 return_ACPI_STATUS(AE_NO_MEMORY);
804
805         dpc->function = function;
806         dpc->context = context;
807
808         INIT_WORK(&dpc->work, acpi_os_execute_deferred);
809         queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq;
810         if (!queue_work(queue, &dpc->work)) {
811                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
812                           "Call to queue_work() failed.\n"));
813                 status = AE_ERROR;
814                 kfree(dpc);
815         }
816         return_ACPI_STATUS(status);
817 }
818
819 EXPORT_SYMBOL(acpi_os_execute);
820
821 void acpi_os_wait_events_complete(void *context)
822 {
823         flush_workqueue(kacpid_wq);
824 }
825
826 EXPORT_SYMBOL(acpi_os_wait_events_complete);
827
828 /*
829  * Allocate the memory for a spinlock and initialize it.
830  */
831 acpi_status acpi_os_create_lock(acpi_spinlock * handle)
832 {
833         spin_lock_init(*handle);
834
835         return AE_OK;
836 }
837
838 /*
839  * Deallocate the memory for a spinlock.
840  */
841 void acpi_os_delete_lock(acpi_spinlock handle)
842 {
843         return;
844 }
845
846 acpi_status
847 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
848 {
849         struct semaphore *sem = NULL;
850
851
852         sem = acpi_os_allocate(sizeof(struct semaphore));
853         if (!sem)
854                 return AE_NO_MEMORY;
855         memset(sem, 0, sizeof(struct semaphore));
856
857         sema_init(sem, initial_units);
858
859         *handle = (acpi_handle *) sem;
860
861         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
862                           *handle, initial_units));
863
864         return AE_OK;
865 }
866
867 /*
868  * TODO: A better way to delete semaphores?  Linux doesn't have a
869  * 'delete_semaphore()' function -- may result in an invalid
870  * pointer dereference for non-synchronized consumers.  Should
871  * we at least check for blocked threads and signal/cancel them?
872  */
873
874 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
875 {
876         struct semaphore *sem = (struct semaphore *)handle;
877
878
879         if (!sem)
880                 return AE_BAD_PARAMETER;
881
882         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
883
884         kfree(sem);
885         sem = NULL;
886
887         return AE_OK;
888 }
889
890 /*
891  * TODO: The kernel doesn't have a 'down_timeout' function -- had to
892  * improvise.  The process is to sleep for one scheduler quantum
893  * until the semaphore becomes available.  Downside is that this
894  * may result in starvation for timeout-based waits when there's
895  * lots of semaphore activity.
896  *
897  * TODO: Support for units > 1?
898  */
899 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
900 {
901         acpi_status status = AE_OK;
902         struct semaphore *sem = (struct semaphore *)handle;
903         int ret = 0;
904
905
906         if (!sem || (units < 1))
907                 return AE_BAD_PARAMETER;
908
909         if (units > 1)
910                 return AE_SUPPORT;
911
912         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
913                           handle, units, timeout));
914
915         /*
916          * This can be called during resume with interrupts off.
917          * Like boot-time, we should be single threaded and will
918          * always get the lock if we try -- timeout or not.
919          * If this doesn't succeed, then we will oops courtesy of
920          * might_sleep() in down().
921          */
922         if (!down_trylock(sem))
923                 return AE_OK;
924
925         switch (timeout) {
926                 /*
927                  * No Wait:
928                  * --------
929                  * A zero timeout value indicates that we shouldn't wait - just
930                  * acquire the semaphore if available otherwise return AE_TIME
931                  * (a.k.a. 'would block').
932                  */
933         case 0:
934                 if (down_trylock(sem))
935                         status = AE_TIME;
936                 break;
937
938                 /*
939                  * Wait Indefinitely:
940                  * ------------------
941                  */
942         case ACPI_WAIT_FOREVER:
943                 down(sem);
944                 break;
945
946                 /*
947                  * Wait w/ Timeout:
948                  * ----------------
949                  */
950         default:
951                 // TODO: A better timeout algorithm?
952                 {
953                         int i = 0;
954                         static const int quantum_ms = 1000 / HZ;
955
956                         ret = down_trylock(sem);
957                         for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) {
958                                 schedule_timeout_interruptible(1);
959                                 ret = down_trylock(sem);
960                         }
961
962                         if (ret != 0)
963                                 status = AE_TIME;
964                 }
965                 break;
966         }
967
968         if (ACPI_FAILURE(status)) {
969                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
970                                   "Failed to acquire semaphore[%p|%d|%d], %s",
971                                   handle, units, timeout,
972                                   acpi_format_exception(status)));
973         } else {
974                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
975                                   "Acquired semaphore[%p|%d|%d]", handle,
976                                   units, timeout));
977         }
978
979         return status;
980 }
981
982 /*
983  * TODO: Support for units > 1?
984  */
985 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
986 {
987         struct semaphore *sem = (struct semaphore *)handle;
988
989
990         if (!sem || (units < 1))
991                 return AE_BAD_PARAMETER;
992
993         if (units > 1)
994                 return AE_SUPPORT;
995
996         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
997                           units));
998
999         up(sem);
1000
1001         return AE_OK;
1002 }
1003
1004 #ifdef ACPI_FUTURE_USAGE
1005 u32 acpi_os_get_line(char *buffer)
1006 {
1007
1008 #ifdef ENABLE_DEBUGGER
1009         if (acpi_in_debugger) {
1010                 u32 chars;
1011
1012                 kdb_read(buffer, sizeof(line_buf));
1013
1014                 /* remove the CR kdb includes */
1015                 chars = strlen(buffer) - 1;
1016                 buffer[chars] = '\0';
1017         }
1018 #endif
1019
1020         return 0;
1021 }
1022 #endif                          /*  ACPI_FUTURE_USAGE  */
1023
1024 acpi_status acpi_os_signal(u32 function, void *info)
1025 {
1026         switch (function) {
1027         case ACPI_SIGNAL_FATAL:
1028                 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1029                 break;
1030         case ACPI_SIGNAL_BREAKPOINT:
1031                 /*
1032                  * AML Breakpoint
1033                  * ACPI spec. says to treat it as a NOP unless
1034                  * you are debugging.  So if/when we integrate
1035                  * AML debugger into the kernel debugger its
1036                  * hook will go here.  But until then it is
1037                  * not useful to print anything on breakpoints.
1038                  */
1039                 break;
1040         default:
1041                 break;
1042         }
1043
1044         return AE_OK;
1045 }
1046
1047 static int __init acpi_os_name_setup(char *str)
1048 {
1049         char *p = acpi_os_name;
1050         int count = ACPI_MAX_OVERRIDE_LEN - 1;
1051
1052         if (!str || !*str)
1053                 return 0;
1054
1055         for (; count-- && str && *str; str++) {
1056                 if (isalnum(*str) || *str == ' ' || *str == ':')
1057                         *p++ = *str;
1058                 else if (*str == '\'' || *str == '"')
1059                         continue;
1060                 else
1061                         break;
1062         }
1063         *p = 0;
1064
1065         return 1;
1066
1067 }
1068
1069 __setup("acpi_os_name=", acpi_os_name_setup);
1070
1071 static void __init set_osi_linux(unsigned int enable)
1072 {
1073         if (osi_linux.enable != enable) {
1074                 osi_linux.enable = enable;
1075                 printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
1076                         enable ? "Add": "Delet");
1077         }
1078         return;
1079 }
1080
1081 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1082 {
1083         osi_linux.cmdline = 1;  /* cmdline set the default */
1084         set_osi_linux(enable);
1085
1086         return;
1087 }
1088
1089 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1090 {
1091         osi_linux.dmi = 1;      /* DMI knows that this box asks OSI(Linux) */
1092
1093         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1094
1095         if (enable == -1)
1096                 return;
1097
1098         osi_linux.known = 1;    /* DMI knows which OSI(Linux) default needed */
1099
1100         set_osi_linux(enable);
1101
1102         return;
1103 }
1104
1105 /*
1106  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1107  *
1108  * empty string disables _OSI
1109  * string starting with '!' disables that string
1110  * otherwise string is added to list, augmenting built-in strings
1111  */
1112 static int __init acpi_osi_setup(char *str)
1113 {
1114         if (str == NULL || *str == '\0') {
1115                 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1116                 acpi_gbl_create_osi_method = FALSE;
1117         } else if (!strcmp("!Linux", str)) {
1118                 acpi_cmdline_osi_linux(0);      /* !enable */
1119         } else if (*str == '!') {
1120                 if (acpi_osi_invalidate(++str) == AE_OK)
1121                         printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1122         } else if (!strcmp("Linux", str)) {
1123                 acpi_cmdline_osi_linux(1);      /* enable */
1124         } else if (*osi_additional_string == '\0') {
1125                 strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
1126                 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1127         }
1128
1129         return 1;
1130 }
1131
1132 __setup("acpi_osi=", acpi_osi_setup);
1133
1134 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1135 static int __init acpi_serialize_setup(char *str)
1136 {
1137         printk(KERN_INFO PREFIX "serialize enabled\n");
1138
1139         acpi_gbl_all_methods_serialized = TRUE;
1140
1141         return 1;
1142 }
1143
1144 __setup("acpi_serialize", acpi_serialize_setup);
1145
1146 /*
1147  * Wake and Run-Time GPES are expected to be separate.
1148  * We disable wake-GPEs at run-time to prevent spurious
1149  * interrupts.
1150  *
1151  * However, if a system exists that shares Wake and
1152  * Run-time events on the same GPE this flag is available
1153  * to tell Linux to keep the wake-time GPEs enabled at run-time.
1154  */
1155 static int __init acpi_wake_gpes_always_on_setup(char *str)
1156 {
1157         printk(KERN_INFO PREFIX "wake GPEs not disabled\n");
1158
1159         acpi_gbl_leave_wake_gpes_disabled = FALSE;
1160
1161         return 1;
1162 }
1163
1164 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
1165
1166 /* Check of resource interference between native drivers and ACPI
1167  * OperationRegions (SystemIO and System Memory only).
1168  * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1169  * in arbitrary AML code and can interfere with legacy drivers.
1170  * acpi_enforce_resources= can be set to:
1171  *
1172  *   - strict           (2)
1173  *     -> further driver trying to access the resources will not load
1174  *   - lax (default)    (1)
1175  *     -> further driver trying to access the resources will load, but you
1176  *     get a system message that something might go wrong...
1177  *
1178  *   - no               (0)
1179  *     -> ACPI Operation Region resources will not be registered
1180  *
1181  */
1182 #define ENFORCE_RESOURCES_STRICT 2
1183 #define ENFORCE_RESOURCES_LAX    1
1184 #define ENFORCE_RESOURCES_NO     0
1185
1186 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1187
1188 static int __init acpi_enforce_resources_setup(char *str)
1189 {
1190         if (str == NULL || *str == '\0')
1191                 return 0;
1192
1193         if (!strcmp("strict", str))
1194                 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1195         else if (!strcmp("lax", str))
1196                 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1197         else if (!strcmp("no", str))
1198                 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1199
1200         return 1;
1201 }
1202
1203 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1204
1205 /* Check for resource conflicts between ACPI OperationRegions and native
1206  * drivers */
1207 int acpi_check_resource_conflict(struct resource *res)
1208 {
1209         struct acpi_res_list *res_list_elem;
1210         int ioport;
1211         int clash = 0;
1212
1213         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1214                 return 0;
1215         if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1216                 return 0;
1217
1218         ioport = res->flags & IORESOURCE_IO;
1219
1220         spin_lock(&acpi_res_lock);
1221         list_for_each_entry(res_list_elem, &resource_list_head,
1222                             resource_list) {
1223                 if (ioport && (res_list_elem->resource_type
1224                                != ACPI_ADR_SPACE_SYSTEM_IO))
1225                         continue;
1226                 if (!ioport && (res_list_elem->resource_type
1227                                 != ACPI_ADR_SPACE_SYSTEM_MEMORY))
1228                         continue;
1229
1230                 if (res->end < res_list_elem->start
1231                     || res_list_elem->end < res->start)
1232                         continue;
1233                 clash = 1;
1234                 break;
1235         }
1236         spin_unlock(&acpi_res_lock);
1237
1238         if (clash) {
1239                 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1240                         printk(KERN_INFO "%sACPI: %s resource %s [0x%llx-0x%llx]"
1241                                " conflicts with ACPI region %s"
1242                                " [0x%llx-0x%llx]\n",
1243                                acpi_enforce_resources == ENFORCE_RESOURCES_LAX
1244                                ? KERN_WARNING : KERN_ERR,
1245                                ioport ? "I/O" : "Memory", res->name,
1246                                (long long) res->start, (long long) res->end,
1247                                res_list_elem->name,
1248                                (long long) res_list_elem->start,
1249                                (long long) res_list_elem->end);
1250                         printk(KERN_INFO "ACPI: Device needs an ACPI driver\n");
1251                 }
1252                 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1253                         return -EBUSY;
1254         }
1255         return 0;
1256 }
1257 EXPORT_SYMBOL(acpi_check_resource_conflict);
1258
1259 int acpi_check_region(resource_size_t start, resource_size_t n,
1260                       const char *name)
1261 {
1262         struct resource res = {
1263                 .start = start,
1264                 .end   = start + n - 1,
1265                 .name  = name,
1266                 .flags = IORESOURCE_IO,
1267         };
1268
1269         return acpi_check_resource_conflict(&res);
1270 }
1271 EXPORT_SYMBOL(acpi_check_region);
1272
1273 int acpi_check_mem_region(resource_size_t start, resource_size_t n,
1274                       const char *name)
1275 {
1276         struct resource res = {
1277                 .start = start,
1278                 .end   = start + n - 1,
1279                 .name  = name,
1280                 .flags = IORESOURCE_MEM,
1281         };
1282
1283         return acpi_check_resource_conflict(&res);
1284
1285 }
1286 EXPORT_SYMBOL(acpi_check_mem_region);
1287
1288 /*
1289  * Acquire a spinlock.
1290  *
1291  * handle is a pointer to the spinlock_t.
1292  */
1293
1294 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1295 {
1296         acpi_cpu_flags flags;
1297         spin_lock_irqsave(lockp, flags);
1298         return flags;
1299 }
1300
1301 /*
1302  * Release a spinlock. See above.
1303  */
1304
1305 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1306 {
1307         spin_unlock_irqrestore(lockp, flags);
1308 }
1309
1310 #ifndef ACPI_USE_LOCAL_CACHE
1311
1312 /*******************************************************************************
1313  *
1314  * FUNCTION:    acpi_os_create_cache
1315  *
1316  * PARAMETERS:  name      - Ascii name for the cache
1317  *              size      - Size of each cached object
1318  *              depth     - Maximum depth of the cache (in objects) <ignored>
1319  *              cache     - Where the new cache object is returned
1320  *
1321  * RETURN:      status
1322  *
1323  * DESCRIPTION: Create a cache object
1324  *
1325  ******************************************************************************/
1326
1327 acpi_status
1328 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1329 {
1330         *cache = kmem_cache_create(name, size, 0, 0, NULL);
1331         if (*cache == NULL)
1332                 return AE_ERROR;
1333         else
1334                 return AE_OK;
1335 }
1336
1337 /*******************************************************************************
1338  *
1339  * FUNCTION:    acpi_os_purge_cache
1340  *
1341  * PARAMETERS:  Cache           - Handle to cache object
1342  *
1343  * RETURN:      Status
1344  *
1345  * DESCRIPTION: Free all objects within the requested cache.
1346  *
1347  ******************************************************************************/
1348
1349 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1350 {
1351         kmem_cache_shrink(cache);
1352         return (AE_OK);
1353 }
1354
1355 /*******************************************************************************
1356  *
1357  * FUNCTION:    acpi_os_delete_cache
1358  *
1359  * PARAMETERS:  Cache           - Handle to cache object
1360  *
1361  * RETURN:      Status
1362  *
1363  * DESCRIPTION: Free all objects within the requested cache and delete the
1364  *              cache object.
1365  *
1366  ******************************************************************************/
1367
1368 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1369 {
1370         kmem_cache_destroy(cache);
1371         return (AE_OK);
1372 }
1373
1374 /*******************************************************************************
1375  *
1376  * FUNCTION:    acpi_os_release_object
1377  *
1378  * PARAMETERS:  Cache       - Handle to cache object
1379  *              Object      - The object to be released
1380  *
1381  * RETURN:      None
1382  *
1383  * DESCRIPTION: Release an object to the specified cache.  If cache is full,
1384  *              the object is deleted.
1385  *
1386  ******************************************************************************/
1387
1388 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1389 {
1390         kmem_cache_free(cache, object);
1391         return (AE_OK);
1392 }
1393
1394 /**
1395  *      acpi_dmi_dump - dump DMI slots needed for blacklist entry
1396  *
1397  *      Returns 0 on success
1398  */
1399 static int acpi_dmi_dump(void)
1400 {
1401
1402         if (!dmi_available)
1403                 return -1;
1404
1405         printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n",
1406                 dmi_get_system_info(DMI_SYS_VENDOR));
1407         printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n",
1408                 dmi_get_system_info(DMI_PRODUCT_NAME));
1409         printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n",
1410                 dmi_get_system_info(DMI_PRODUCT_VERSION));
1411         printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n",
1412                 dmi_get_system_info(DMI_BOARD_NAME));
1413         printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n",
1414                 dmi_get_system_info(DMI_BIOS_VENDOR));
1415         printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n",
1416                 dmi_get_system_info(DMI_BIOS_DATE));
1417
1418         return 0;
1419 }
1420
1421
1422 /******************************************************************************
1423  *
1424  * FUNCTION:    acpi_os_validate_interface
1425  *
1426  * PARAMETERS:  interface           - Requested interface to be validated
1427  *
1428  * RETURN:      AE_OK if interface is supported, AE_SUPPORT otherwise
1429  *
1430  * DESCRIPTION: Match an interface string to the interfaces supported by the
1431  *              host. Strings originate from an AML call to the _OSI method.
1432  *
1433  *****************************************************************************/
1434
1435 acpi_status
1436 acpi_os_validate_interface (char *interface)
1437 {
1438         if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
1439                 return AE_OK;
1440         if (!strcmp("Linux", interface)) {
1441
1442                 printk(KERN_NOTICE PREFIX
1443                         "BIOS _OSI(Linux) query %s%s\n",
1444                         osi_linux.enable ? "honored" : "ignored",
1445                         osi_linux.cmdline ? " via cmdline" :
1446                         osi_linux.dmi ? " via DMI" : "");
1447
1448                 if (!osi_linux.dmi) {
1449                         if (acpi_dmi_dump())
1450                                 printk(KERN_NOTICE PREFIX
1451                                         "[please extract dmidecode output]\n");
1452                         printk(KERN_NOTICE PREFIX
1453                                 "Please send DMI info above to "
1454                                 "linux-acpi@vger.kernel.org\n");
1455                 }
1456                 if (!osi_linux.known && !osi_linux.cmdline) {
1457                         printk(KERN_NOTICE PREFIX
1458                                 "If \"acpi_osi=%sLinux\" works better, "
1459                                 "please notify linux-acpi@vger.kernel.org\n",
1460                                 osi_linux.enable ? "!" : "");
1461                 }
1462
1463                 if (osi_linux.enable)
1464                         return AE_OK;
1465         }
1466         return AE_SUPPORT;
1467 }
1468
1469 /******************************************************************************
1470  *
1471  * FUNCTION:    acpi_os_validate_address
1472  *
1473  * PARAMETERS:  space_id             - ACPI space ID
1474  *              address             - Physical address
1475  *              length              - Address length
1476  *
1477  * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
1478  *              should return AE_AML_ILLEGAL_ADDRESS.
1479  *
1480  * DESCRIPTION: Validate a system address via the host OS. Used to validate
1481  *              the addresses accessed by AML operation regions.
1482  *
1483  *****************************************************************************/
1484
1485 acpi_status
1486 acpi_os_validate_address (
1487     u8                   space_id,
1488     acpi_physical_address   address,
1489     acpi_size               length,
1490     char *name)
1491 {
1492         struct acpi_res_list *res;
1493         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1494                 return AE_OK;
1495
1496         switch (space_id) {
1497         case ACPI_ADR_SPACE_SYSTEM_IO:
1498         case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1499                 /* Only interference checks against SystemIO and SytemMemory
1500                    are needed */
1501                 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
1502                 if (!res)
1503                         return AE_OK;
1504                 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1505                 strlcpy(res->name, name, 5);
1506                 res->start = address;
1507                 res->end = address + length - 1;
1508                 res->resource_type = space_id;
1509                 spin_lock(&acpi_res_lock);
1510                 list_add(&res->resource_list, &resource_list_head);
1511                 spin_unlock(&acpi_res_lock);
1512                 pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
1513                          "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1514                          ? "SystemIO" : "System Memory",
1515                          (unsigned long long)res->start,
1516                          (unsigned long long)res->end,
1517                          res->name);
1518                 break;
1519         case ACPI_ADR_SPACE_PCI_CONFIG:
1520         case ACPI_ADR_SPACE_EC:
1521         case ACPI_ADR_SPACE_SMBUS:
1522         case ACPI_ADR_SPACE_CMOS:
1523         case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1524         case ACPI_ADR_SPACE_DATA_TABLE:
1525         case ACPI_ADR_SPACE_FIXED_HARDWARE:
1526                 break;
1527         }
1528         return AE_OK;
1529 }
1530
1531 #endif