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authorHuang, Ying <ying.huang@intel.com>2008-01-30 07:31:19 -0500
committerIngo Molnar <mingo@elte.hu>2008-01-30 07:31:19 -0500
commite429795c68d3001ecae74f6465420c9f043b0ece (patch)
tree46e24522c3b7fbe7dc9f7fc63b4c942ff48e4070 /arch/x86/kernel/efi_32.c
parent9ad65e4748f55e3159283d7fa9d54fb30c086113 (diff)
x86: EFI runtime service support: remove duplicated code from efi_32.c
This patch removes the duplicated code between efi_32.c and efi.c. Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/efi_32.c')
-rw-r--r--arch/x86/kernel/efi_32.c430
1 files changed, 2 insertions, 428 deletions
diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c
index 863e8926f2bb..1df13725e519 100644
--- a/arch/x86/kernel/efi_32.c
+++ b/arch/x86/kernel/efi_32.c
@@ -39,21 +39,8 @@
39#include <asm/desc.h> 39#include <asm/desc.h>
40#include <asm/tlbflush.h> 40#include <asm/tlbflush.h>
41 41
42#define EFI_DEBUG 0
43#define PFX "EFI: " 42#define PFX "EFI: "
44 43
45extern efi_status_t asmlinkage efi_call_phys(void *, ...);
46
47struct efi efi;
48EXPORT_SYMBOL(efi);
49static struct efi efi_phys;
50struct efi_memory_map memmap;
51
52/*
53 * We require an early boot_ioremap mapping mechanism initially
54 */
55extern void * boot_ioremap(unsigned long, unsigned long);
56
57/* 44/*
58 * To make EFI call EFI runtime service in physical addressing mode we need 45 * To make EFI call EFI runtime service in physical addressing mode we need
59 * prelog/epilog before/after the invocation to disable interrupt, to 46 * prelog/epilog before/after the invocation to disable interrupt, to
@@ -65,7 +52,7 @@ static unsigned long efi_rt_eflags;
65static DEFINE_SPINLOCK(efi_rt_lock); 52static DEFINE_SPINLOCK(efi_rt_lock);
66static pgd_t efi_bak_pg_dir_pointer[2]; 53static pgd_t efi_bak_pg_dir_pointer[2];
67 54
68static void efi_call_phys_prelog(void) __acquires(efi_rt_lock) 55void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
69{ 56{
70 unsigned long cr4; 57 unsigned long cr4;
71 unsigned long temp; 58 unsigned long temp;
@@ -108,7 +95,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock)
108 load_gdt(&gdt_descr); 95 load_gdt(&gdt_descr);
109} 96}
110 97
111static void efi_call_phys_epilog(void) __releases(efi_rt_lock) 98void efi_call_phys_epilog(void) __releases(efi_rt_lock)
112{ 99{
113 unsigned long cr4; 100 unsigned long cr4;
114 struct desc_ptr gdt_descr; 101 struct desc_ptr gdt_descr;
@@ -138,87 +125,6 @@ static void efi_call_phys_epilog(void) __releases(efi_rt_lock)
138 spin_unlock(&efi_rt_lock); 125 spin_unlock(&efi_rt_lock);
139} 126}
140 127
141static efi_status_t
142phys_efi_set_virtual_address_map(unsigned long memory_map_size,
143 unsigned long descriptor_size,
144 u32 descriptor_version,
145 efi_memory_desc_t *virtual_map)
146{
147 efi_status_t status;
148
149 efi_call_phys_prelog();
150 status = efi_call_phys(efi_phys.set_virtual_address_map,
151 memory_map_size, descriptor_size,
152 descriptor_version, virtual_map);
153 efi_call_phys_epilog();
154 return status;
155}
156
157static efi_status_t
158phys_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
159{
160 efi_status_t status;
161
162 efi_call_phys_prelog();
163 status = efi_call_phys(efi_phys.get_time, tm, tc);
164 efi_call_phys_epilog();
165 return status;
166}
167
168inline int efi_set_rtc_mmss(unsigned long nowtime)
169{
170 int real_seconds, real_minutes;
171 efi_status_t status;
172 efi_time_t eft;
173 efi_time_cap_t cap;
174
175 spin_lock(&efi_rt_lock);
176 status = efi.get_time(&eft, &cap);
177 spin_unlock(&efi_rt_lock);
178 if (status != EFI_SUCCESS)
179 panic("Ooops, efitime: can't read time!\n");
180 real_seconds = nowtime % 60;
181 real_minutes = nowtime / 60;
182
183 if (((abs(real_minutes - eft.minute) + 15)/30) & 1)
184 real_minutes += 30;
185 real_minutes %= 60;
186
187 eft.minute = real_minutes;
188 eft.second = real_seconds;
189
190 if (status != EFI_SUCCESS) {
191 printk("Ooops: efitime: can't read time!\n");
192 return -1;
193 }
194 return 0;
195}
196/*
197 * This is used during kernel init before runtime
198 * services have been remapped and also during suspend, therefore,
199 * we'll need to call both in physical and virtual modes.
200 */
201inline unsigned long efi_get_time(void)
202{
203 efi_status_t status;
204 efi_time_t eft;
205 efi_time_cap_t cap;
206
207 if (efi.get_time) {
208 /* if we are in virtual mode use remapped function */
209 status = efi.get_time(&eft, &cap);
210 } else {
211 /* we are in physical mode */
212 status = phys_efi_get_time(&eft, &cap);
213 }
214
215 if (status != EFI_SUCCESS)
216 printk("Oops: efitime: can't read time status: 0x%lx\n",status);
217
218 return mktime(eft.year, eft.month, eft.day, eft.hour,
219 eft.minute, eft.second);
220}
221
222int is_available_memory(efi_memory_desc_t * md) 128int is_available_memory(efi_memory_desc_t * md)
223{ 129{
224 if (!(md->attribute & EFI_MEMORY_WB)) 130 if (!(md->attribute & EFI_MEMORY_WB))
@@ -250,24 +156,6 @@ void __init efi_map_memmap(void)
250 memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); 156 memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
251} 157}
252 158
253#if EFI_DEBUG
254static void __init print_efi_memmap(void)
255{
256 efi_memory_desc_t *md;
257 void *p;
258 int i;
259
260 for (p = memmap.map, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) {
261 md = p;
262 printk(KERN_INFO "mem%02u: type=%u, attr=0x%llx, "
263 "range=[0x%016llx-0x%016llx) (%lluMB)\n",
264 i, md->type, md->attribute, md->phys_addr,
265 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
266 (md->num_pages >> (20 - EFI_PAGE_SHIFT)));
267 }
268}
269#endif /* EFI_DEBUG */
270
271/* 159/*
272 * Walks the EFI memory map and calls CALLBACK once for each EFI 160 * Walks the EFI memory map and calls CALLBACK once for each EFI
273 * memory descriptor that has memory that is available for kernel use. 161 * memory descriptor that has memory that is available for kernel use.
@@ -319,288 +207,6 @@ void efi_memmap_walk(efi_freemem_callback_t callback, void *arg)
319 } 207 }
320} 208}
321 209
322void __init efi_init(void)
323{
324 efi_config_table_t *config_tables;
325 efi_runtime_services_t *runtime;
326 efi_char16_t *c16;
327 char vendor[100] = "unknown";
328 unsigned long num_config_tables;
329 int i = 0;
330
331 memset(&efi, 0, sizeof(efi) );
332 memset(&efi_phys, 0, sizeof(efi_phys));
333
334 efi_phys.systab =
335 (efi_system_table_t *)boot_params.efi_info.efi_systab;
336 memmap.phys_map = (void *)boot_params.efi_info.efi_memmap;
337 memmap.nr_map = boot_params.efi_info.efi_memmap_size/
338 boot_params.efi_info.efi_memdesc_size;
339 memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
340 memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
341
342 efi.systab = (efi_system_table_t *)
343 boot_ioremap((unsigned long) efi_phys.systab,
344 sizeof(efi_system_table_t));
345 /*
346 * Verify the EFI Table
347 */
348 if (efi.systab == NULL)
349 printk(KERN_ERR PFX "Woah! Couldn't map the EFI system table.\n");
350 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
351 printk(KERN_ERR PFX "Woah! EFI system table signature incorrect\n");
352 if ((efi.systab->hdr.revision >> 16) == 0)
353 printk(KERN_ERR PFX "Warning: EFI system table version "
354 "%d.%02d, expected 1.00 or greater\n",
355 efi.systab->hdr.revision >> 16,
356 efi.systab->hdr.revision & 0xffff);
357
358 /*
359 * Grab some details from the system table
360 */
361 num_config_tables = efi.systab->nr_tables;
362 config_tables = (efi_config_table_t *)efi.systab->tables;
363 runtime = efi.systab->runtime;
364
365 /*
366 * Show what we know for posterity
367 */
368 c16 = (efi_char16_t *) boot_ioremap(efi.systab->fw_vendor, 2);
369 if (c16) {
370 for (i = 0; i < (sizeof(vendor) - 1) && *c16; ++i)
371 vendor[i] = *c16++;
372 vendor[i] = '\0';
373 } else
374 printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
375
376 printk(KERN_INFO PFX "EFI v%u.%.02u by %s \n",
377 efi.systab->hdr.revision >> 16,
378 efi.systab->hdr.revision & 0xffff, vendor);
379
380 /*
381 * Let's see what config tables the firmware passed to us.
382 */
383 config_tables = (efi_config_table_t *)
384 boot_ioremap((unsigned long) config_tables,
385 num_config_tables * sizeof(efi_config_table_t));
386
387 if (config_tables == NULL)
388 printk(KERN_ERR PFX "Could not map EFI Configuration Table!\n");
389
390 efi.mps = EFI_INVALID_TABLE_ADDR;
391 efi.acpi = EFI_INVALID_TABLE_ADDR;
392 efi.acpi20 = EFI_INVALID_TABLE_ADDR;
393 efi.smbios = EFI_INVALID_TABLE_ADDR;
394 efi.sal_systab = EFI_INVALID_TABLE_ADDR;
395 efi.boot_info = EFI_INVALID_TABLE_ADDR;
396 efi.hcdp = EFI_INVALID_TABLE_ADDR;
397 efi.uga = EFI_INVALID_TABLE_ADDR;
398
399 for (i = 0; i < num_config_tables; i++) {
400 if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
401 efi.mps = config_tables[i].table;
402 printk(KERN_INFO " MPS=0x%lx ", config_tables[i].table);
403 } else
404 if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
405 efi.acpi20 = config_tables[i].table;
406 printk(KERN_INFO " ACPI 2.0=0x%lx ", config_tables[i].table);
407 } else
408 if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
409 efi.acpi = config_tables[i].table;
410 printk(KERN_INFO " ACPI=0x%lx ", config_tables[i].table);
411 } else
412 if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
413 efi.smbios = config_tables[i].table;
414 printk(KERN_INFO " SMBIOS=0x%lx ", config_tables[i].table);
415 } else
416 if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
417 efi.hcdp = config_tables[i].table;
418 printk(KERN_INFO " HCDP=0x%lx ", config_tables[i].table);
419 } else
420 if (efi_guidcmp(config_tables[i].guid, UGA_IO_PROTOCOL_GUID) == 0) {
421 efi.uga = config_tables[i].table;
422 printk(KERN_INFO " UGA=0x%lx ", config_tables[i].table);
423 }
424 }
425 printk("\n");
426
427 /*
428 * Check out the runtime services table. We need to map
429 * the runtime services table so that we can grab the physical
430 * address of several of the EFI runtime functions, needed to
431 * set the firmware into virtual mode.
432 */
433
434 runtime = (efi_runtime_services_t *) boot_ioremap((unsigned long)
435 runtime,
436 sizeof(efi_runtime_services_t));
437 if (runtime != NULL) {
438 /*
439 * We will only need *early* access to the following
440 * two EFI runtime services before set_virtual_address_map
441 * is invoked.
442 */
443 efi_phys.get_time = (efi_get_time_t *) runtime->get_time;
444 efi_phys.set_virtual_address_map =
445 (efi_set_virtual_address_map_t *)
446 runtime->set_virtual_address_map;
447 } else
448 printk(KERN_ERR PFX "Could not map the runtime service table!\n");
449
450 /* Map the EFI memory map for use until paging_init() */
451 memmap.map = boot_ioremap(boot_params.efi_info.efi_memmap,
452 boot_params.efi_info.efi_memmap_size);
453 if (memmap.map == NULL)
454 printk(KERN_ERR PFX "Could not map the EFI memory map!\n");
455
456 memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
457
458#if EFI_DEBUG
459 print_efi_memmap();
460#endif
461}
462
463static inline void __init check_range_for_systab(efi_memory_desc_t *md)
464{
465 if (((unsigned long)md->phys_addr <= (unsigned long)efi_phys.systab) &&
466 ((unsigned long)efi_phys.systab < md->phys_addr +
467 ((unsigned long)md->num_pages << EFI_PAGE_SHIFT))) {
468 unsigned long addr;
469
470 addr = md->virt_addr - md->phys_addr +
471 (unsigned long)efi_phys.systab;
472 efi.systab = (efi_system_table_t *)addr;
473 }
474}
475
476/*
477 * Wrap all the virtual calls in a way that forces the parameters on the stack.
478 */
479
480#define efi_call_virt(f, args...) \
481 ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
482
483static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
484{
485 return efi_call_virt(get_time, tm, tc);
486}
487
488static efi_status_t virt_efi_set_time (efi_time_t *tm)
489{
490 return efi_call_virt(set_time, tm);
491}
492
493static efi_status_t virt_efi_get_wakeup_time (efi_bool_t *enabled,
494 efi_bool_t *pending,
495 efi_time_t *tm)
496{
497 return efi_call_virt(get_wakeup_time, enabled, pending, tm);
498}
499
500static efi_status_t virt_efi_set_wakeup_time (efi_bool_t enabled,
501 efi_time_t *tm)
502{
503 return efi_call_virt(set_wakeup_time, enabled, tm);
504}
505
506static efi_status_t virt_efi_get_variable (efi_char16_t *name,
507 efi_guid_t *vendor, u32 *attr,
508 unsigned long *data_size, void *data)
509{
510 return efi_call_virt(get_variable, name, vendor, attr, data_size, data);
511}
512
513static efi_status_t virt_efi_get_next_variable (unsigned long *name_size,
514 efi_char16_t *name,
515 efi_guid_t *vendor)
516{
517 return efi_call_virt(get_next_variable, name_size, name, vendor);
518}
519
520static efi_status_t virt_efi_set_variable (efi_char16_t *name,
521 efi_guid_t *vendor,
522 unsigned long attr,
523 unsigned long data_size, void *data)
524{
525 return efi_call_virt(set_variable, name, vendor, attr, data_size, data);
526}
527
528static efi_status_t virt_efi_get_next_high_mono_count (u32 *count)
529{
530 return efi_call_virt(get_next_high_mono_count, count);
531}
532
533static void virt_efi_reset_system (int reset_type, efi_status_t status,
534 unsigned long data_size,
535 efi_char16_t *data)
536{
537 efi_call_virt(reset_system, reset_type, status, data_size, data);
538}
539
540/*
541 * This function will switch the EFI runtime services to virtual mode.
542 * Essentially, look through the EFI memmap and map every region that
543 * has the runtime attribute bit set in its memory descriptor and update
544 * that memory descriptor with the virtual address obtained from ioremap().
545 * This enables the runtime services to be called without having to
546 * thunk back into physical mode for every invocation.
547 */
548
549void __init efi_enter_virtual_mode(void)
550{
551 efi_memory_desc_t *md;
552 efi_status_t status;
553 void *p;
554
555 efi.systab = NULL;
556
557 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
558 md = p;
559
560 if (!(md->attribute & EFI_MEMORY_RUNTIME))
561 continue;
562
563 md->virt_addr = (unsigned long)ioremap(md->phys_addr,
564 md->num_pages << EFI_PAGE_SHIFT);
565 if (!(unsigned long)md->virt_addr) {
566 printk(KERN_ERR PFX "ioremap of 0x%lX failed\n",
567 (unsigned long)md->phys_addr);
568 }
569 /* update the virtual address of the EFI system table */
570 check_range_for_systab(md);
571 }
572
573 BUG_ON(!efi.systab);
574
575 status = phys_efi_set_virtual_address_map(
576 memmap.desc_size * memmap.nr_map,
577 memmap.desc_size,
578 memmap.desc_version,
579 memmap.phys_map);
580
581 if (status != EFI_SUCCESS) {
582 printk (KERN_ALERT "You are screwed! "
583 "Unable to switch EFI into virtual mode "
584 "(status=%lx)\n", status);
585 panic("EFI call to SetVirtualAddressMap() failed!");
586 }
587
588 /*
589 * Now that EFI is in virtual mode, update the function
590 * pointers in the runtime service table to the new virtual addresses.
591 */
592
593 efi.get_time = virt_efi_get_time;
594 efi.set_time = virt_efi_set_time;
595 efi.get_wakeup_time = virt_efi_get_wakeup_time;
596 efi.set_wakeup_time = virt_efi_set_wakeup_time;
597 efi.get_variable = virt_efi_get_variable;
598 efi.get_next_variable = virt_efi_get_next_variable;
599 efi.set_variable = virt_efi_set_variable;
600 efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
601 efi.reset_system = virt_efi_reset_system;
602}
603
604void __init 210void __init
605efi_initialize_iomem_resources(struct resource *code_resource, 211efi_initialize_iomem_resources(struct resource *code_resource,
606 struct resource *data_resource, 212 struct resource *data_resource,
@@ -683,35 +289,3 @@ efi_initialize_iomem_resources(struct resource *code_resource,
683 } 289 }
684 } 290 }
685} 291}
686
687/*
688 * Convenience functions to obtain memory types and attributes
689 */
690
691u32 efi_mem_type(unsigned long phys_addr)
692{
693 efi_memory_desc_t *md;
694 void *p;
695
696 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
697 md = p;
698 if ((md->phys_addr <= phys_addr) && (phys_addr <
699 (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
700 return md->type;
701 }
702 return 0;
703}
704
705u64 efi_mem_attributes(unsigned long phys_addr)
706{
707 efi_memory_desc_t *md;
708 void *p;
709
710 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
711 md = p;
712 if ((md->phys_addr <= phys_addr) && (phys_addr <
713 (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
714 return md->attribute;
715 }
716 return 0;
717}
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-23 03:23:02 -0400