2 * EFI application boot time services
4 * Copyright (c) 2016 Alexander Graf
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <efi_loader.h>
12 #include <environment.h>
14 #include <asm/global_data.h>
15 #include <libfdt_env.h>
16 #include <u-boot/crc.h>
21 DECLARE_GLOBAL_DATA_PTR
;
23 /* Task priority level */
24 static efi_uintn_t efi_tpl
= TPL_APPLICATION
;
26 /* This list contains all the EFI objects our payload has access to */
27 LIST_HEAD(efi_obj_list
);
30 * If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
31 * we need to do trickery with caches. Since we don't want to break the EFI
32 * aware boot path, only apply hacks when loading exiting directly (breaking
33 * direct Linux EFI booting along the way - oh well).
35 static bool efi_is_direct_boot
= true;
38 * EFI can pass arbitrary additional "tables" containing vendor specific
39 * information to the payload. One such table is the FDT table which contains
40 * a pointer to a flattened device tree blob.
42 * In most cases we want to pass an FDT to the payload, so reserve one slot of
43 * config table space for it. The pointer gets populated by do_bootefi_exec().
45 static struct efi_configuration_table __efi_runtime_data efi_conf_table
[2];
49 * The "gd" pointer lives in a register on ARM and AArch64 that we declare
50 * fixed when compiling U-Boot. However, the payload does not know about that
51 * restriction so we need to manually swap its and our view of that register on
52 * EFI callback entry/exit.
54 static volatile void *efi_gd
, *app_gd
;
57 static int entry_count
;
58 static int nesting_level
;
60 /* Called on every callback entry */
61 int __efi_entry_check(void)
63 int ret
= entry_count
++ == 0;
72 /* Called on every callback exit */
73 int __efi_exit_check(void)
75 int ret
= --entry_count
== 0;
82 /* Called from do_bootefi_exec() */
83 void efi_save_gd(void)
91 * Special case handler for error/abort that just forces things back
92 * to u-boot world so we can dump out an abort msg, without any care
93 * about returning back to UEFI world.
95 void efi_restore_gd(void)
98 /* Only restore if we're already in EFI context */
106 * Two spaces per indent level, maxing out at 10.. which ought to be
107 * enough for anyone ;-)
109 static const char *indent_string(int level
)
111 const char *indent
= " ";
112 const int max
= strlen(indent
);
113 level
= min(max
, level
* 2);
114 return &indent
[max
- level
];
117 const char *__efi_nesting(void)
119 return indent_string(nesting_level
);
122 const char *__efi_nesting_inc(void)
124 return indent_string(nesting_level
++);
127 const char *__efi_nesting_dec(void)
129 return indent_string(--nesting_level
);
133 * Queue an EFI event.
135 * This function queues the notification function of the event for future
138 * The notification function is called if the task priority level of the
139 * event is higher than the current task priority level.
141 * For the SignalEvent service see efi_signal_event_ext.
143 * @event event to signal
145 void efi_signal_event(struct efi_event
*event
)
147 if (event
->notify_function
) {
148 event
->is_queued
= true;
150 if (efi_tpl
>= event
->notify_tpl
)
152 EFI_CALL_VOID(event
->notify_function(event
,
153 event
->notify_context
));
155 event
->is_queued
= false;
159 * Raise the task priority level.
161 * This function implements the RaiseTpl service.
162 * See the Unified Extensible Firmware Interface (UEFI) specification
165 * @new_tpl new value of the task priority level
166 * @return old value of the task priority level
168 static unsigned long EFIAPI
efi_raise_tpl(efi_uintn_t new_tpl
)
170 efi_uintn_t old_tpl
= efi_tpl
;
172 EFI_ENTRY("0x%zx", new_tpl
);
174 if (new_tpl
< efi_tpl
)
175 debug("WARNING: new_tpl < current_tpl in %s\n", __func__
);
177 if (efi_tpl
> TPL_HIGH_LEVEL
)
178 efi_tpl
= TPL_HIGH_LEVEL
;
180 EFI_EXIT(EFI_SUCCESS
);
185 * Lower the task priority level.
187 * This function implements the RestoreTpl service.
188 * See the Unified Extensible Firmware Interface (UEFI) specification
191 * @old_tpl value of the task priority level to be restored
193 static void EFIAPI
efi_restore_tpl(efi_uintn_t old_tpl
)
195 EFI_ENTRY("0x%zx", old_tpl
);
197 if (old_tpl
> efi_tpl
)
198 debug("WARNING: old_tpl > current_tpl in %s\n", __func__
);
200 if (efi_tpl
> TPL_HIGH_LEVEL
)
201 efi_tpl
= TPL_HIGH_LEVEL
;
203 EFI_EXIT(EFI_SUCCESS
);
207 * Allocate memory pages.
209 * This function implements the AllocatePages service.
210 * See the Unified Extensible Firmware Interface (UEFI) specification
213 * @type type of allocation to be performed
214 * @memory_type usage type of the allocated memory
215 * @pages number of pages to be allocated
216 * @memory allocated memory
217 * @return status code
219 static efi_status_t EFIAPI
efi_allocate_pages_ext(int type
, int memory_type
,
225 EFI_ENTRY("%d, %d, 0x%zx, %p", type
, memory_type
, pages
, memory
);
226 r
= efi_allocate_pages(type
, memory_type
, pages
, memory
);
233 * This function implements the FreePages service.
234 * See the Unified Extensible Firmware Interface (UEFI) specification
237 * @memory start of the memory area to be freed
238 * @pages number of pages to be freed
239 * @return status code
241 static efi_status_t EFIAPI
efi_free_pages_ext(uint64_t memory
,
246 EFI_ENTRY("%"PRIx64
", 0x%zx", memory
, pages
);
247 r
= efi_free_pages(memory
, pages
);
252 * Get map describing memory usage.
254 * This function implements the GetMemoryMap service.
255 * See the Unified Extensible Firmware Interface (UEFI) specification
258 * @memory_map_size on entry the size, in bytes, of the memory map buffer,
259 * on exit the size of the copied memory map
260 * @memory_map buffer to which the memory map is written
261 * @map_key key for the memory map
262 * @descriptor_size size of an individual memory descriptor
263 * @descriptor_version version number of the memory descriptor structure
264 * @return status code
266 static efi_status_t EFIAPI
efi_get_memory_map_ext(
267 efi_uintn_t
*memory_map_size
,
268 struct efi_mem_desc
*memory_map
,
269 efi_uintn_t
*map_key
,
270 efi_uintn_t
*descriptor_size
,
271 uint32_t *descriptor_version
)
275 EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size
, memory_map
,
276 map_key
, descriptor_size
, descriptor_version
);
277 r
= efi_get_memory_map(memory_map_size
, memory_map
, map_key
,
278 descriptor_size
, descriptor_version
);
283 * Allocate memory from pool.
285 * This function implements the AllocatePool service.
286 * See the Unified Extensible Firmware Interface (UEFI) specification
289 * @pool_type type of the pool from which memory is to be allocated
290 * @size number of bytes to be allocated
291 * @buffer allocated memory
292 * @return status code
294 static efi_status_t EFIAPI
efi_allocate_pool_ext(int pool_type
,
300 EFI_ENTRY("%d, %zd, %p", pool_type
, size
, buffer
);
301 r
= efi_allocate_pool(pool_type
, size
, buffer
);
306 * Free memory from pool.
308 * This function implements the FreePool service.
309 * See the Unified Extensible Firmware Interface (UEFI) specification
312 * @buffer start of memory to be freed
313 * @return status code
315 static efi_status_t EFIAPI
efi_free_pool_ext(void *buffer
)
319 EFI_ENTRY("%p", buffer
);
320 r
= efi_free_pool(buffer
);
324 static efi_status_t
efi_create_handle(void **handle
)
326 struct efi_object
*obj
;
329 r
= efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES
,
330 sizeof(struct efi_object
),
332 if (r
!= EFI_SUCCESS
)
334 memset(obj
, 0, sizeof(struct efi_object
));
336 list_add_tail(&obj
->link
, &efi_obj_list
);
342 * Our event capabilities are very limited. Only a small limited
343 * number of events is allowed to coexist.
345 static struct efi_event efi_events
[16];
350 * This function is used inside U-Boot code to create an event.
352 * For the API function implementing the CreateEvent service see
353 * efi_create_event_ext.
355 * @type type of the event to create
356 * @notify_tpl task priority level of the event
357 * @notify_function notification function of the event
358 * @notify_context pointer passed to the notification function
359 * @event created event
360 * @return status code
362 efi_status_t
efi_create_event(uint32_t type
, efi_uintn_t notify_tpl
,
363 void (EFIAPI
*notify_function
) (
364 struct efi_event
*event
,
366 void *notify_context
, struct efi_event
**event
)
371 return EFI_INVALID_PARAMETER
;
373 if ((type
& EVT_NOTIFY_SIGNAL
) && (type
& EVT_NOTIFY_WAIT
))
374 return EFI_INVALID_PARAMETER
;
376 if ((type
& (EVT_NOTIFY_SIGNAL
|EVT_NOTIFY_WAIT
)) &&
377 notify_function
== NULL
)
378 return EFI_INVALID_PARAMETER
;
380 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
381 if (efi_events
[i
].type
)
383 efi_events
[i
].type
= type
;
384 efi_events
[i
].notify_tpl
= notify_tpl
;
385 efi_events
[i
].notify_function
= notify_function
;
386 efi_events
[i
].notify_context
= notify_context
;
387 /* Disable timers on bootup */
388 efi_events
[i
].trigger_next
= -1ULL;
389 efi_events
[i
].is_queued
= false;
390 efi_events
[i
].is_signaled
= false;
391 *event
= &efi_events
[i
];
394 return EFI_OUT_OF_RESOURCES
;
400 * This function implements the CreateEvent service.
401 * See the Unified Extensible Firmware Interface (UEFI) specification
404 * @type type of the event to create
405 * @notify_tpl task priority level of the event
406 * @notify_function notification function of the event
407 * @notify_context pointer passed to the notification function
408 * @event created event
409 * @return status code
411 static efi_status_t EFIAPI
efi_create_event_ext(
412 uint32_t type
, efi_uintn_t notify_tpl
,
413 void (EFIAPI
*notify_function
) (
414 struct efi_event
*event
,
416 void *notify_context
, struct efi_event
**event
)
418 EFI_ENTRY("%d, 0x%zx, %p, %p", type
, notify_tpl
, notify_function
,
420 return EFI_EXIT(efi_create_event(type
, notify_tpl
, notify_function
,
421 notify_context
, event
));
426 * Check if a timer event has occurred or a queued notification function should
429 * Our timers have to work without interrupts, so we check whenever keyboard
430 * input or disk accesses happen if enough time elapsed for them to fire.
432 void efi_timer_check(void)
435 u64 now
= timer_get_us();
437 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
438 if (!efi_events
[i
].type
)
440 if (efi_events
[i
].is_queued
)
441 efi_signal_event(&efi_events
[i
]);
442 if (!(efi_events
[i
].type
& EVT_TIMER
) ||
443 now
< efi_events
[i
].trigger_next
)
445 switch (efi_events
[i
].trigger_type
) {
446 case EFI_TIMER_RELATIVE
:
447 efi_events
[i
].trigger_type
= EFI_TIMER_STOP
;
449 case EFI_TIMER_PERIODIC
:
450 efi_events
[i
].trigger_next
+=
451 efi_events
[i
].trigger_time
;
456 efi_events
[i
].is_signaled
= true;
457 efi_signal_event(&efi_events
[i
]);
463 * Set the trigger time for a timer event or stop the event.
465 * This is the function for internal usage in U-Boot. For the API function
466 * implementing the SetTimer service see efi_set_timer_ext.
468 * @event event for which the timer is set
469 * @type type of the timer
470 * @trigger_time trigger period in multiples of 100ns
471 * @return status code
473 efi_status_t
efi_set_timer(struct efi_event
*event
, enum efi_timer_delay type
,
474 uint64_t trigger_time
)
479 * The parameter defines a multiple of 100ns.
480 * We use multiples of 1000ns. So divide by 10.
482 do_div(trigger_time
, 10);
484 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
485 if (event
!= &efi_events
[i
])
488 if (!(event
->type
& EVT_TIMER
))
492 event
->trigger_next
= -1ULL;
494 case EFI_TIMER_PERIODIC
:
495 case EFI_TIMER_RELATIVE
:
496 event
->trigger_next
=
497 timer_get_us() + trigger_time
;
500 return EFI_INVALID_PARAMETER
;
502 event
->trigger_type
= type
;
503 event
->trigger_time
= trigger_time
;
504 event
->is_signaled
= false;
507 return EFI_INVALID_PARAMETER
;
511 * Set the trigger time for a timer event or stop the event.
513 * This function implements the SetTimer service.
514 * See the Unified Extensible Firmware Interface (UEFI) specification
517 * @event event for which the timer is set
518 * @type type of the timer
519 * @trigger_time trigger period in multiples of 100ns
520 * @return status code
522 static efi_status_t EFIAPI
efi_set_timer_ext(struct efi_event
*event
,
523 enum efi_timer_delay type
,
524 uint64_t trigger_time
)
526 EFI_ENTRY("%p, %d, %"PRIx64
, event
, type
, trigger_time
);
527 return EFI_EXIT(efi_set_timer(event
, type
, trigger_time
));
531 * Wait for events to be signaled.
533 * This function implements the WaitForEvent service.
534 * See the Unified Extensible Firmware Interface (UEFI) specification
537 * @num_events number of events to be waited for
538 * @events events to be waited for
539 * @index index of the event that was signaled
540 * @return status code
542 static efi_status_t EFIAPI
efi_wait_for_event(efi_uintn_t num_events
,
543 struct efi_event
**event
,
548 EFI_ENTRY("%zd, %p, %p", num_events
, event
, index
);
550 /* Check parameters */
551 if (!num_events
|| !event
)
552 return EFI_EXIT(EFI_INVALID_PARAMETER
);
554 if (efi_tpl
!= TPL_APPLICATION
)
555 return EFI_EXIT(EFI_UNSUPPORTED
);
556 for (i
= 0; i
< num_events
; ++i
) {
557 for (j
= 0; j
< ARRAY_SIZE(efi_events
); ++j
) {
558 if (event
[i
] == &efi_events
[j
])
561 return EFI_EXIT(EFI_INVALID_PARAMETER
);
563 if (!event
[i
]->type
|| event
[i
]->type
& EVT_NOTIFY_SIGNAL
)
564 return EFI_EXIT(EFI_INVALID_PARAMETER
);
565 if (!event
[i
]->is_signaled
)
566 efi_signal_event(event
[i
]);
569 /* Wait for signal */
571 for (i
= 0; i
< num_events
; ++i
) {
572 if (event
[i
]->is_signaled
)
575 /* Allow events to occur. */
581 * Reset the signal which is passed to the caller to allow periodic
584 event
[i
]->is_signaled
= false;
588 return EFI_EXIT(EFI_SUCCESS
);
592 * Signal an EFI event.
594 * This function implements the SignalEvent service.
595 * See the Unified Extensible Firmware Interface (UEFI) specification
598 * This functions sets the signaled state of the event and queues the
599 * notification function for execution.
601 * @event event to signal
602 * @return status code
604 static efi_status_t EFIAPI
efi_signal_event_ext(struct efi_event
*event
)
608 EFI_ENTRY("%p", event
);
609 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
610 if (event
!= &efi_events
[i
])
612 if (event
->is_signaled
)
614 event
->is_signaled
= true;
615 if (event
->type
& EVT_NOTIFY_SIGNAL
)
616 efi_signal_event(event
);
619 return EFI_EXIT(EFI_SUCCESS
);
623 * Close an EFI event.
625 * This function implements the CloseEvent service.
626 * See the Unified Extensible Firmware Interface (UEFI) specification
629 * @event event to close
630 * @return status code
632 static efi_status_t EFIAPI
efi_close_event(struct efi_event
*event
)
636 EFI_ENTRY("%p", event
);
637 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
638 if (event
== &efi_events
[i
]) {
640 event
->trigger_next
= -1ULL;
641 event
->is_queued
= false;
642 event
->is_signaled
= false;
643 return EFI_EXIT(EFI_SUCCESS
);
646 return EFI_EXIT(EFI_INVALID_PARAMETER
);
650 * Check if an event is signaled.
652 * This function implements the CheckEvent service.
653 * See the Unified Extensible Firmware Interface (UEFI) specification
656 * If an event is not signaled yet the notification function is queued.
658 * @event event to check
659 * @return status code
661 static efi_status_t EFIAPI
efi_check_event(struct efi_event
*event
)
665 EFI_ENTRY("%p", event
);
667 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
668 if (event
!= &efi_events
[i
])
670 if (!event
->type
|| event
->type
& EVT_NOTIFY_SIGNAL
)
672 if (!event
->is_signaled
)
673 efi_signal_event(event
);
674 if (event
->is_signaled
)
675 return EFI_EXIT(EFI_SUCCESS
);
676 return EFI_EXIT(EFI_NOT_READY
);
678 return EFI_EXIT(EFI_INVALID_PARAMETER
);
682 * Find the internal EFI object for a handle.
684 * @handle handle to find
687 struct efi_object
*efi_search_obj(void *handle
)
689 struct efi_object
*efiobj
;
691 list_for_each_entry(efiobj
, &efi_obj_list
, link
) {
692 if (efiobj
->handle
== handle
)
700 * Install protocol interface.
702 * This function implements the InstallProtocolInterface service.
703 * See the Unified Extensible Firmware Interface (UEFI) specification
706 * @handle handle on which the protocol shall be installed
707 * @protocol GUID of the protocol to be installed
708 * @protocol_interface_type type of the interface to be installed,
709 * always EFI_NATIVE_INTERFACE
710 * @protocol_interface interface of the protocol implementation
711 * @return status code
713 static efi_status_t EFIAPI
efi_install_protocol_interface(
714 void **handle
, const efi_guid_t
*protocol
,
715 int protocol_interface_type
, void *protocol_interface
)
717 struct list_head
*lhandle
;
721 EFI_ENTRY("%p, %pUl, %d, %p", handle
, protocol
, protocol_interface_type
,
724 if (!handle
|| !protocol
||
725 protocol_interface_type
!= EFI_NATIVE_INTERFACE
) {
726 r
= EFI_INVALID_PARAMETER
;
730 /* Create new handle if requested. */
732 r
= efi_create_handle(handle
);
733 if (r
!= EFI_SUCCESS
)
737 list_for_each(lhandle
, &efi_obj_list
) {
738 struct efi_object
*efiobj
;
739 efiobj
= list_entry(lhandle
, struct efi_object
, link
);
741 if (efiobj
->handle
!= *handle
)
743 /* Check if protocol is already installed on the handle. */
744 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
745 struct efi_handler
*handler
= &efiobj
->protocols
[i
];
749 if (!guidcmp(handler
->guid
, protocol
)) {
750 r
= EFI_INVALID_PARAMETER
;
754 /* Install protocol in first empty slot. */
755 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
756 struct efi_handler
*handler
= &efiobj
->protocols
[i
];
761 handler
->guid
= protocol
;
762 handler
->protocol_interface
= protocol_interface
;
766 r
= EFI_OUT_OF_RESOURCES
;
769 r
= EFI_INVALID_PARAMETER
;
775 * Reinstall protocol interface.
777 * This function implements the ReinstallProtocolInterface service.
778 * See the Unified Extensible Firmware Interface (UEFI) specification
781 * @handle handle on which the protocol shall be
783 * @protocol GUID of the protocol to be installed
784 * @old_interface interface to be removed
785 * @new_interface interface to be installed
786 * @return status code
788 static efi_status_t EFIAPI
efi_reinstall_protocol_interface(void *handle
,
789 const efi_guid_t
*protocol
, void *old_interface
,
792 EFI_ENTRY("%p, %pUl, %p, %p", handle
, protocol
, old_interface
,
794 return EFI_EXIT(EFI_ACCESS_DENIED
);
798 * Uninstall protocol interface.
800 * This function implements the UninstallProtocolInterface service.
801 * See the Unified Extensible Firmware Interface (UEFI) specification
804 * @handle handle from which the protocol shall be removed
805 * @protocol GUID of the protocol to be removed
806 * @protocol_interface interface to be removed
807 * @return status code
809 static efi_status_t EFIAPI
efi_uninstall_protocol_interface(
810 void *handle
, const efi_guid_t
*protocol
,
811 void *protocol_interface
)
813 struct list_head
*lhandle
;
815 efi_status_t r
= EFI_NOT_FOUND
;
817 EFI_ENTRY("%p, %pUl, %p", handle
, protocol
, protocol_interface
);
819 if (!handle
|| !protocol
) {
820 r
= EFI_INVALID_PARAMETER
;
824 list_for_each(lhandle
, &efi_obj_list
) {
825 struct efi_object
*efiobj
;
826 efiobj
= list_entry(lhandle
, struct efi_object
, link
);
828 if (efiobj
->handle
!= handle
)
831 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
832 struct efi_handler
*handler
= &efiobj
->protocols
[i
];
833 const efi_guid_t
*hprotocol
= handler
->guid
;
837 if (!guidcmp(hprotocol
, protocol
)) {
838 if (handler
->protocol_interface
) {
839 r
= EFI_ACCESS_DENIED
;
854 * Register an event for notification when a protocol is installed.
856 * This function implements the RegisterProtocolNotify service.
857 * See the Unified Extensible Firmware Interface (UEFI) specification
860 * @protocol GUID of the protocol whose installation shall be
862 * @event event to be signaled upon installation of the protocol
863 * @registration key for retrieving the registration information
864 * @return status code
866 static efi_status_t EFIAPI
efi_register_protocol_notify(
867 const efi_guid_t
*protocol
,
868 struct efi_event
*event
,
871 EFI_ENTRY("%pUl, %p, %p", protocol
, event
, registration
);
872 return EFI_EXIT(EFI_OUT_OF_RESOURCES
);
876 * Determine if an EFI handle implements a protocol.
878 * See the documentation of the LocateHandle service in the UEFI specification.
880 * @search_type selection criterion
881 * @protocol GUID of the protocol
882 * @search_key registration key
884 * @return 0 if the handle implements the protocol
886 static int efi_search(enum efi_locate_search_type search_type
,
887 const efi_guid_t
*protocol
, void *search_key
,
888 struct efi_object
*efiobj
)
892 switch (search_type
) {
895 case BY_REGISTER_NOTIFY
:
896 /* RegisterProtocolNotify is not implemented yet */
899 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
900 const efi_guid_t
*guid
= efiobj
->protocols
[i
].guid
;
901 if (guid
&& !guidcmp(guid
, protocol
))
911 * Locate handles implementing a protocol.
913 * This function is meant for U-Boot internal calls. For the API implementation
914 * of the LocateHandle service see efi_locate_handle_ext.
916 * @search_type selection criterion
917 * @protocol GUID of the protocol
918 * @search_key registration key
919 * @buffer_size size of the buffer to receive the handles in bytes
920 * @buffer buffer to receive the relevant handles
921 * @return status code
923 static efi_status_t
efi_locate_handle(
924 enum efi_locate_search_type search_type
,
925 const efi_guid_t
*protocol
, void *search_key
,
926 efi_uintn_t
*buffer_size
, efi_handle_t
*buffer
)
928 struct efi_object
*efiobj
;
929 efi_uintn_t size
= 0;
931 /* Check parameters */
932 switch (search_type
) {
935 case BY_REGISTER_NOTIFY
:
937 return EFI_INVALID_PARAMETER
;
938 /* RegisterProtocolNotify is not implemented yet */
939 return EFI_UNSUPPORTED
;
942 return EFI_INVALID_PARAMETER
;
945 return EFI_INVALID_PARAMETER
;
949 * efi_locate_handle_buffer uses this function for
950 * the calculation of the necessary buffer size.
951 * So do not require a buffer for buffersize == 0.
953 if (!buffer_size
|| (*buffer_size
&& !buffer
))
954 return EFI_INVALID_PARAMETER
;
956 /* Count how much space we need */
957 list_for_each_entry(efiobj
, &efi_obj_list
, link
) {
958 if (!efi_search(search_type
, protocol
, search_key
, efiobj
))
959 size
+= sizeof(void*);
962 if (*buffer_size
< size
) {
964 return EFI_BUFFER_TOO_SMALL
;
969 return EFI_NOT_FOUND
;
971 /* Then fill the array */
972 list_for_each_entry(efiobj
, &efi_obj_list
, link
) {
973 if (!efi_search(search_type
, protocol
, search_key
, efiobj
))
974 *buffer
++ = efiobj
->handle
;
981 * Locate handles implementing a protocol.
983 * This function implements the LocateHandle service.
984 * See the Unified Extensible Firmware Interface (UEFI) specification
987 * @search_type selection criterion
988 * @protocol GUID of the protocol
989 * @search_key registration key
990 * @buffer_size size of the buffer to receive the handles in bytes
991 * @buffer buffer to receive the relevant handles
992 * @return 0 if the handle implements the protocol
994 static efi_status_t EFIAPI
efi_locate_handle_ext(
995 enum efi_locate_search_type search_type
,
996 const efi_guid_t
*protocol
, void *search_key
,
997 efi_uintn_t
*buffer_size
, efi_handle_t
*buffer
)
999 EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type
, protocol
, search_key
,
1000 buffer_size
, buffer
);
1002 return EFI_EXIT(efi_locate_handle(search_type
, protocol
, search_key
,
1003 buffer_size
, buffer
));
1007 * Get the device path and handle of an device implementing a protocol.
1009 * This function implements the LocateDevicePath service.
1010 * See the Unified Extensible Firmware Interface (UEFI) specification
1013 * @protocol GUID of the protocol
1014 * @device_path device path
1015 * @device handle of the device
1016 * @return status code
1018 static efi_status_t EFIAPI
efi_locate_device_path(
1019 const efi_guid_t
*protocol
,
1020 struct efi_device_path
**device_path
,
1021 efi_handle_t
*device
)
1023 struct efi_object
*efiobj
;
1025 EFI_ENTRY("%pUl, %p, %p", protocol
, device_path
, device
);
1027 efiobj
= efi_dp_find_obj(*device_path
, device_path
);
1029 return EFI_EXIT(EFI_NOT_FOUND
);
1031 *device
= efiobj
->handle
;
1033 return EFI_EXIT(EFI_SUCCESS
);
1036 /* Collapses configuration table entries, removing index i */
1037 static void efi_remove_configuration_table(int i
)
1039 struct efi_configuration_table
*this = &efi_conf_table
[i
];
1040 struct efi_configuration_table
*next
= &efi_conf_table
[i
+1];
1041 struct efi_configuration_table
*end
= &efi_conf_table
[systab
.nr_tables
];
1043 memmove(this, next
, (ulong
)end
- (ulong
)next
);
1048 * Adds, updates, or removes a configuration table.
1050 * This function is used for internal calls. For the API implementation of the
1051 * InstallConfigurationTable service see efi_install_configuration_table_ext.
1053 * @guid GUID of the installed table
1054 * @table table to be installed
1055 * @return status code
1057 efi_status_t
efi_install_configuration_table(const efi_guid_t
*guid
, void *table
)
1061 /* Check for guid override */
1062 for (i
= 0; i
< systab
.nr_tables
; i
++) {
1063 if (!guidcmp(guid
, &efi_conf_table
[i
].guid
)) {
1065 efi_conf_table
[i
].table
= table
;
1067 efi_remove_configuration_table(i
);
1073 return EFI_NOT_FOUND
;
1075 /* No override, check for overflow */
1076 if (i
>= ARRAY_SIZE(efi_conf_table
))
1077 return EFI_OUT_OF_RESOURCES
;
1079 /* Add a new entry */
1080 memcpy(&efi_conf_table
[i
].guid
, guid
, sizeof(*guid
));
1081 efi_conf_table
[i
].table
= table
;
1082 systab
.nr_tables
= i
+ 1;
1088 * Adds, updates, or removes a configuration table.
1090 * This function implements the InstallConfigurationTable service.
1091 * See the Unified Extensible Firmware Interface (UEFI) specification
1094 * @guid GUID of the installed table
1095 * @table table to be installed
1096 * @return status code
1098 static efi_status_t EFIAPI
efi_install_configuration_table_ext(efi_guid_t
*guid
,
1101 EFI_ENTRY("%pUl, %p", guid
, table
);
1102 return EFI_EXIT(efi_install_configuration_table(guid
, table
));
1106 * Initialize a loaded_image_info + loaded_image_info object with correct
1107 * protocols, boot-device, etc.
1109 * @info loaded image info to be passed to the entry point of the
1111 * @obj internal object associated with the loaded image
1112 * @device_path device path of the loaded image
1113 * @file_path file path of the loaded image
1115 void efi_setup_loaded_image(struct efi_loaded_image
*info
, struct efi_object
*obj
,
1116 struct efi_device_path
*device_path
,
1117 struct efi_device_path
*file_path
)
1122 * When asking for the device path interface, return
1123 * bootefi_device_path
1125 obj
->protocols
[0].guid
= &efi_guid_device_path
;
1126 obj
->protocols
[0].protocol_interface
= device_path
;
1129 * When asking for the loaded_image interface, just
1130 * return handle which points to loaded_image_info
1132 obj
->protocols
[1].guid
= &efi_guid_loaded_image
;
1133 obj
->protocols
[1].protocol_interface
= info
;
1135 obj
->protocols
[2].guid
= &efi_guid_console_control
;
1136 obj
->protocols
[2].protocol_interface
= (void *)&efi_console_control
;
1138 obj
->protocols
[3].guid
= &efi_guid_device_path_to_text_protocol
;
1139 obj
->protocols
[3].protocol_interface
=
1140 (void *)&efi_device_path_to_text
;
1142 info
->file_path
= file_path
;
1144 info
->device_handle
= efi_dp_find_obj(device_path
, NULL
);
1146 list_add_tail(&obj
->link
, &efi_obj_list
);
1150 * Load an image using a file path.
1152 * @file_path the path of the image to load
1153 * @buffer buffer containing the loaded image
1154 * @return status code
1156 efi_status_t
efi_load_image_from_path(struct efi_device_path
*file_path
,
1159 struct efi_file_info
*info
= NULL
;
1160 struct efi_file_handle
*f
;
1161 static efi_status_t ret
;
1164 f
= efi_file_from_path(file_path
);
1166 return EFI_DEVICE_ERROR
;
1169 EFI_CALL(ret
= f
->getinfo(f
, (efi_guid_t
*)&efi_file_info_guid
,
1171 if (ret
== EFI_BUFFER_TOO_SMALL
) {
1173 EFI_CALL(ret
= f
->getinfo(f
, (efi_guid_t
*)&efi_file_info_guid
,
1176 if (ret
!= EFI_SUCCESS
)
1179 ret
= efi_allocate_pool(EFI_LOADER_DATA
, info
->file_size
, buffer
);
1183 EFI_CALL(ret
= f
->read(f
, &info
->file_size
, *buffer
));
1187 EFI_CALL(f
->close(f
));
1189 if (ret
!= EFI_SUCCESS
) {
1190 efi_free_pool(*buffer
);
1198 * Load an EFI image into memory.
1200 * This function implements the LoadImage service.
1201 * See the Unified Extensible Firmware Interface (UEFI) specification
1204 * @boot_policy true for request originating from the boot manager
1205 * @parent_image the calles's image handle
1206 * @file_path the path of the image to load
1207 * @source_buffer memory location from which the image is installed
1208 * @source_size size of the memory area from which the image is
1210 * @image_handle handle for the newly installed image
1211 * @return status code
1213 static efi_status_t EFIAPI
efi_load_image(bool boot_policy
,
1214 efi_handle_t parent_image
,
1215 struct efi_device_path
*file_path
,
1216 void *source_buffer
,
1217 unsigned long source_size
,
1218 efi_handle_t
*image_handle
)
1220 struct efi_loaded_image
*info
;
1221 struct efi_object
*obj
;
1223 EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy
, parent_image
,
1224 file_path
, source_buffer
, source_size
, image_handle
);
1226 info
= calloc(1, sizeof(*info
));
1227 obj
= calloc(1, sizeof(*obj
));
1229 if (!source_buffer
) {
1230 struct efi_device_path
*dp
, *fp
;
1233 ret
= efi_load_image_from_path(file_path
, &source_buffer
);
1234 if (ret
!= EFI_SUCCESS
) {
1237 return EFI_EXIT(ret
);
1241 * split file_path which contains both the device and
1244 efi_dp_split_file_path(file_path
, &dp
, &fp
);
1246 efi_setup_loaded_image(info
, obj
, dp
, fp
);
1248 /* In this case, file_path is the "device" path, ie.
1249 * something like a HARDWARE_DEVICE:MEMORY_MAPPED
1251 efi_setup_loaded_image(info
, obj
, file_path
, NULL
);
1254 info
->reserved
= efi_load_pe(source_buffer
, info
);
1255 if (!info
->reserved
) {
1258 return EFI_EXIT(EFI_UNSUPPORTED
);
1261 info
->system_table
= &systab
;
1262 info
->parent_handle
= parent_image
;
1263 *image_handle
= info
;
1265 return EFI_EXIT(EFI_SUCCESS
);
1269 * Call the entry point of an image.
1271 * This function implements the StartImage service.
1272 * See the Unified Extensible Firmware Interface (UEFI) specification
1275 * @image_handle handle of the image
1276 * @exit_data_size size of the buffer
1277 * @exit_data buffer to receive the exit data of the called image
1278 * @return status code
1280 static efi_status_t EFIAPI
efi_start_image(efi_handle_t image_handle
,
1281 unsigned long *exit_data_size
,
1284 ulong (*entry
)(void *image_handle
, struct efi_system_table
*st
);
1285 struct efi_loaded_image
*info
= image_handle
;
1287 EFI_ENTRY("%p, %p, %p", image_handle
, exit_data_size
, exit_data
);
1288 entry
= info
->reserved
;
1290 efi_is_direct_boot
= false;
1292 /* call the image! */
1293 if (setjmp(&info
->exit_jmp
)) {
1294 /* We returned from the child image */
1295 return EFI_EXIT(info
->exit_status
);
1298 __efi_nesting_dec();
1300 entry(image_handle
, &systab
);
1301 __efi_entry_check();
1302 __efi_nesting_inc();
1304 /* Should usually never get here */
1305 return EFI_EXIT(EFI_SUCCESS
);
1309 * Leave an EFI application or driver.
1311 * This function implements the Exit service.
1312 * See the Unified Extensible Firmware Interface (UEFI) specification
1315 * @image_handle handle of the application or driver that is exiting
1316 * @exit_status status code
1317 * @exit_data_size size of the buffer in bytes
1318 * @exit_data buffer with data describing an error
1319 * @return status code
1321 static efi_status_t EFIAPI
efi_exit(efi_handle_t image_handle
,
1322 efi_status_t exit_status
, unsigned long exit_data_size
,
1325 struct efi_loaded_image
*loaded_image_info
= (void*)image_handle
;
1327 EFI_ENTRY("%p, %ld, %ld, %p", image_handle
, exit_status
,
1328 exit_data_size
, exit_data
);
1330 /* Make sure entry/exit counts for EFI world cross-overs match */
1334 * But longjmp out with the U-Boot gd, not the application's, as
1335 * the other end is a setjmp call inside EFI context.
1339 loaded_image_info
->exit_status
= exit_status
;
1340 longjmp(&loaded_image_info
->exit_jmp
, 1);
1342 panic("EFI application exited");
1346 * Unload an EFI image.
1348 * This function implements the UnloadImage service.
1349 * See the Unified Extensible Firmware Interface (UEFI) specification
1352 * @image_handle handle of the image to be unloaded
1353 * @return status code
1355 static efi_status_t EFIAPI
efi_unload_image(void *image_handle
)
1357 struct efi_object
*efiobj
;
1359 EFI_ENTRY("%p", image_handle
);
1360 efiobj
= efi_search_obj(image_handle
);
1362 list_del(&efiobj
->link
);
1364 return EFI_EXIT(EFI_SUCCESS
);
1368 * Fix up caches for EFI payloads if necessary.
1370 static void efi_exit_caches(void)
1372 #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
1374 * Grub on 32bit ARM needs to have caches disabled before jumping into
1375 * a zImage, but does not know of all cache layers. Give it a hand.
1377 if (efi_is_direct_boot
)
1378 cleanup_before_linux();
1383 * Stop boot services.
1385 * This function implements the ExitBootServices service.
1386 * See the Unified Extensible Firmware Interface (UEFI) specification
1389 * @image_handle handle of the loaded image
1390 * @map_key key of the memory map
1391 * @return status code
1393 static efi_status_t EFIAPI
efi_exit_boot_services(void *image_handle
,
1394 unsigned long map_key
)
1398 EFI_ENTRY("%p, %ld", image_handle
, map_key
);
1400 /* Notify that ExitBootServices is invoked. */
1401 for (i
= 0; i
< ARRAY_SIZE(efi_events
); ++i
) {
1402 if (efi_events
[i
].type
!= EVT_SIGNAL_EXIT_BOOT_SERVICES
)
1404 efi_signal_event(&efi_events
[i
]);
1406 /* Make sure that notification functions are not called anymore */
1407 efi_tpl
= TPL_HIGH_LEVEL
;
1409 /* XXX Should persist EFI variables here */
1411 board_quiesce_devices();
1413 /* Fix up caches for EFI payloads if necessary */
1416 /* This stops all lingering devices */
1417 bootm_disable_interrupts();
1419 /* Give the payload some time to boot */
1420 efi_set_watchdog(0);
1423 return EFI_EXIT(EFI_SUCCESS
);
1427 * Get next value of the counter.
1429 * This function implements the NextMonotonicCount service.
1430 * See the Unified Extensible Firmware Interface (UEFI) specification
1433 * @count returned value of the counter
1434 * @return status code
1436 static efi_status_t EFIAPI
efi_get_next_monotonic_count(uint64_t *count
)
1438 static uint64_t mono
= 0;
1439 EFI_ENTRY("%p", count
);
1441 return EFI_EXIT(EFI_SUCCESS
);
1447 * This function implements the Stall sercive.
1448 * See the Unified Extensible Firmware Interface (UEFI) specification
1451 * @microseconds period to sleep in microseconds
1452 * @return status code
1454 static efi_status_t EFIAPI
efi_stall(unsigned long microseconds
)
1456 EFI_ENTRY("%ld", microseconds
);
1457 udelay(microseconds
);
1458 return EFI_EXIT(EFI_SUCCESS
);
1462 * Reset the watchdog timer.
1464 * This function implements the SetWatchdogTimer service.
1465 * See the Unified Extensible Firmware Interface (UEFI) specification
1468 * @timeout seconds before reset by watchdog
1469 * @watchdog_code code to be logged when resetting
1470 * @data_size size of buffer in bytes
1471 * @watchdog_data buffer with data describing the reset reason
1472 * @return status code
1474 static efi_status_t EFIAPI
efi_set_watchdog_timer(unsigned long timeout
,
1475 uint64_t watchdog_code
,
1476 unsigned long data_size
,
1477 uint16_t *watchdog_data
)
1479 EFI_ENTRY("%ld, 0x%"PRIx64
", %ld, %p", timeout
, watchdog_code
,
1480 data_size
, watchdog_data
);
1481 return EFI_EXIT(efi_set_watchdog(timeout
));
1485 * Connect a controller to a driver.
1487 * This function implements the ConnectController service.
1488 * See the Unified Extensible Firmware Interface (UEFI) specification
1491 * @controller_handle handle of the controller
1492 * @driver_image_handle handle of the driver
1493 * @remain_device_path device path of a child controller
1494 * @recursive true to connect all child controllers
1495 * @return status code
1497 static efi_status_t EFIAPI
efi_connect_controller(
1498 efi_handle_t controller_handle
,
1499 efi_handle_t
*driver_image_handle
,
1500 struct efi_device_path
*remain_device_path
,
1503 EFI_ENTRY("%p, %p, %p, %d", controller_handle
, driver_image_handle
,
1504 remain_device_path
, recursive
);
1505 return EFI_EXIT(EFI_NOT_FOUND
);
1509 * Disconnect a controller from a driver.
1511 * This function implements the DisconnectController service.
1512 * See the Unified Extensible Firmware Interface (UEFI) specification
1515 * @controller_handle handle of the controller
1516 * @driver_image_handle handle of the driver
1517 * @child_handle handle of the child to destroy
1518 * @return status code
1520 static efi_status_t EFIAPI
efi_disconnect_controller(void *controller_handle
,
1521 void *driver_image_handle
,
1524 EFI_ENTRY("%p, %p, %p", controller_handle
, driver_image_handle
,
1526 return EFI_EXIT(EFI_INVALID_PARAMETER
);
1532 * This function implements the CloseProtocol service.
1533 * See the Unified Extensible Firmware Interface (UEFI) specification
1536 * @handle handle on which the protocol shall be closed
1537 * @protocol GUID of the protocol to close
1538 * @agent_handle handle of the driver
1539 * @controller_handle handle of the controller
1540 * @return status code
1542 static efi_status_t EFIAPI
efi_close_protocol(void *handle
,
1543 const efi_guid_t
*protocol
,
1545 void *controller_handle
)
1547 EFI_ENTRY("%p, %pUl, %p, %p", handle
, protocol
, agent_handle
,
1549 return EFI_EXIT(EFI_NOT_FOUND
);
1553 * Provide information about then open status of a protocol on a handle
1555 * This function implements the OpenProtocolInformation service.
1556 * See the Unified Extensible Firmware Interface (UEFI) specification
1559 * @handle handle for which the information shall be retrieved
1560 * @protocol GUID of the protocol
1561 * @entry_buffer buffer to receive the open protocol information
1562 * @entry_count number of entries available in the buffer
1563 * @return status code
1565 static efi_status_t EFIAPI
efi_open_protocol_information(efi_handle_t handle
,
1566 const efi_guid_t
*protocol
,
1567 struct efi_open_protocol_info_entry
**entry_buffer
,
1568 efi_uintn_t
*entry_count
)
1570 EFI_ENTRY("%p, %pUl, %p, %p", handle
, protocol
, entry_buffer
,
1572 return EFI_EXIT(EFI_NOT_FOUND
);
1576 * Get protocols installed on a handle.
1578 * This function implements the ProtocolsPerHandleService.
1579 * See the Unified Extensible Firmware Interface (UEFI) specification
1582 * @handle handle for which the information is retrieved
1583 * @protocol_buffer buffer with protocol GUIDs
1584 * @protocol_buffer_count number of entries in the buffer
1585 * @return status code
1587 static efi_status_t EFIAPI
efi_protocols_per_handle(void *handle
,
1588 efi_guid_t
***protocol_buffer
,
1589 efi_uintn_t
*protocol_buffer_count
)
1591 unsigned long buffer_size
;
1592 struct efi_object
*efiobj
;
1594 struct list_head
*lhandle
;
1597 EFI_ENTRY("%p, %p, %p", handle
, protocol_buffer
,
1598 protocol_buffer_count
);
1600 if (!handle
|| !protocol_buffer
|| !protocol_buffer_count
)
1601 return EFI_EXIT(EFI_INVALID_PARAMETER
);
1603 *protocol_buffer
= NULL
;
1604 *protocol_buffer_count
= 0;
1605 list_for_each(lhandle
, &efi_obj_list
) {
1606 efiobj
= list_entry(lhandle
, struct efi_object
, link
);
1608 if (efiobj
->handle
!= handle
)
1611 /* Count protocols */
1612 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
1613 if (efiobj
->protocols
[i
].guid
)
1614 ++*protocol_buffer_count
;
1617 if (*protocol_buffer_count
) {
1618 buffer_size
= sizeof(efi_guid_t
*) *
1619 *protocol_buffer_count
;
1620 r
= efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES
,
1622 (void **)protocol_buffer
);
1623 if (r
!= EFI_SUCCESS
)
1626 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); ++i
) {
1627 if (efiobj
->protocols
[i
].guid
) {
1628 (*protocol_buffer
)[j
] = (void *)
1629 efiobj
->protocols
[i
].guid
;
1637 return EFI_EXIT(EFI_SUCCESS
);
1641 * Locate handles implementing a protocol.
1643 * This function implements the LocateHandleBuffer service.
1644 * See the Unified Extensible Firmware Interface (UEFI) specification
1647 * @search_type selection criterion
1648 * @protocol GUID of the protocol
1649 * @search_key registration key
1650 * @no_handles number of returned handles
1651 * @buffer buffer with the returned handles
1652 * @return status code
1654 static efi_status_t EFIAPI
efi_locate_handle_buffer(
1655 enum efi_locate_search_type search_type
,
1656 const efi_guid_t
*protocol
, void *search_key
,
1657 efi_uintn_t
*no_handles
, efi_handle_t
**buffer
)
1660 efi_uintn_t buffer_size
= 0;
1662 EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type
, protocol
, search_key
,
1663 no_handles
, buffer
);
1665 if (!no_handles
|| !buffer
) {
1666 r
= EFI_INVALID_PARAMETER
;
1671 r
= efi_locate_handle(search_type
, protocol
, search_key
, &buffer_size
,
1673 if (r
!= EFI_BUFFER_TOO_SMALL
)
1675 r
= efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES
, buffer_size
,
1677 if (r
!= EFI_SUCCESS
)
1679 r
= efi_locate_handle(search_type
, protocol
, search_key
, &buffer_size
,
1681 if (r
== EFI_SUCCESS
)
1682 *no_handles
= buffer_size
/ sizeof(void *);
1688 * Find an interface implementing a protocol.
1690 * This function implements the LocateProtocol service.
1691 * See the Unified Extensible Firmware Interface (UEFI) specification
1694 * @protocol GUID of the protocol
1695 * @registration registration key passed to the notification function
1696 * @protocol_interface interface implementing the protocol
1697 * @return status code
1699 static efi_status_t EFIAPI
efi_locate_protocol(const efi_guid_t
*protocol
,
1701 void **protocol_interface
)
1703 struct list_head
*lhandle
;
1706 EFI_ENTRY("%pUl, %p, %p", protocol
, registration
, protocol_interface
);
1708 if (!protocol
|| !protocol_interface
)
1709 return EFI_EXIT(EFI_INVALID_PARAMETER
);
1711 EFI_PRINT_GUID("protocol", protocol
);
1713 list_for_each(lhandle
, &efi_obj_list
) {
1714 struct efi_object
*efiobj
;
1716 efiobj
= list_entry(lhandle
, struct efi_object
, link
);
1717 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
1718 struct efi_handler
*handler
= &efiobj
->protocols
[i
];
1722 if (!guidcmp(handler
->guid
, protocol
)) {
1723 *protocol_interface
=
1724 handler
->protocol_interface
;
1725 return EFI_EXIT(EFI_SUCCESS
);
1729 *protocol_interface
= NULL
;
1731 return EFI_EXIT(EFI_NOT_FOUND
);
1735 * Install multiple protocol interfaces.
1737 * This function implements the MultipleProtocolInterfaces service.
1738 * See the Unified Extensible Firmware Interface (UEFI) specification
1741 * @handle handle on which the protocol interfaces shall be installed
1742 * @... NULL terminated argument list with pairs of protocol GUIDS and
1744 * @return status code
1746 static efi_status_t EFIAPI
efi_install_multiple_protocol_interfaces(
1749 EFI_ENTRY("%p", handle
);
1752 const efi_guid_t
*protocol
;
1753 void *protocol_interface
;
1754 efi_status_t r
= EFI_SUCCESS
;
1758 return EFI_EXIT(EFI_INVALID_PARAMETER
);
1760 va_start(argptr
, handle
);
1762 protocol
= va_arg(argptr
, efi_guid_t
*);
1765 protocol_interface
= va_arg(argptr
, void*);
1766 r
= EFI_CALL(efi_install_protocol_interface(
1768 EFI_NATIVE_INTERFACE
,
1769 protocol_interface
));
1770 if (r
!= EFI_SUCCESS
)
1775 if (r
== EFI_SUCCESS
)
1778 /* If an error occurred undo all changes. */
1779 va_start(argptr
, handle
);
1781 protocol
= va_arg(argptr
, efi_guid_t
*);
1782 protocol_interface
= va_arg(argptr
, void*);
1783 EFI_CALL(efi_uninstall_protocol_interface(handle
, protocol
,
1784 protocol_interface
));
1792 * Uninstall multiple protocol interfaces.
1794 * This function implements the UninstallMultipleProtocolInterfaces service.
1795 * See the Unified Extensible Firmware Interface (UEFI) specification
1798 * @handle handle from which the protocol interfaces shall be removed
1799 * @... NULL terminated argument list with pairs of protocol GUIDS and
1801 * @return status code
1803 static efi_status_t EFIAPI
efi_uninstall_multiple_protocol_interfaces(
1806 EFI_ENTRY("%p", handle
);
1807 return EFI_EXIT(EFI_INVALID_PARAMETER
);
1811 * Calculate cyclic redundancy code.
1813 * This function implements the CalculateCrc32 service.
1814 * See the Unified Extensible Firmware Interface (UEFI) specification
1817 * @data buffer with data
1818 * @data_size size of buffer in bytes
1819 * @crc32_p cyclic redundancy code
1820 * @return status code
1822 static efi_status_t EFIAPI
efi_calculate_crc32(void *data
,
1823 unsigned long data_size
,
1826 EFI_ENTRY("%p, %ld", data
, data_size
);
1827 *crc32_p
= crc32(0, data
, data_size
);
1828 return EFI_EXIT(EFI_SUCCESS
);
1834 * This function implements the CopyMem service.
1835 * See the Unified Extensible Firmware Interface (UEFI) specification
1838 * @destination destination of the copy operation
1839 * @source source of the copy operation
1840 * @length number of bytes to copy
1842 static void EFIAPI
efi_copy_mem(void *destination
, const void *source
,
1845 EFI_ENTRY("%p, %p, %ld", destination
, source
, (unsigned long)length
);
1846 memcpy(destination
, source
, length
);
1847 EFI_EXIT(EFI_SUCCESS
);
1851 * Fill memory with a byte value.
1853 * This function implements the SetMem service.
1854 * See the Unified Extensible Firmware Interface (UEFI) specification
1857 * @buffer buffer to fill
1858 * @size size of buffer in bytes
1859 * @value byte to copy to the buffer
1861 static void EFIAPI
efi_set_mem(void *buffer
, size_t size
, uint8_t value
)
1863 EFI_ENTRY("%p, %ld, 0x%x", buffer
, (unsigned long)size
, value
);
1864 memset(buffer
, value
, size
);
1865 EFI_EXIT(EFI_SUCCESS
);
1869 * Open protocol interface on a handle.
1871 * This function implements the OpenProtocol interface.
1872 * See the Unified Extensible Firmware Interface (UEFI) specification
1875 * @handle handle on which the protocol shall be opened
1876 * @protocol GUID of the protocol
1877 * @protocol_interface interface implementing the protocol
1878 * @agent_handle handle of the driver
1879 * @controller_handle handle of the controller
1880 * @attributes attributes indicating how to open the protocol
1881 * @return status code
1883 static efi_status_t EFIAPI
efi_open_protocol(
1884 void *handle
, const efi_guid_t
*protocol
,
1885 void **protocol_interface
, void *agent_handle
,
1886 void *controller_handle
, uint32_t attributes
)
1888 struct list_head
*lhandle
;
1890 efi_status_t r
= EFI_INVALID_PARAMETER
;
1892 EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle
, protocol
,
1893 protocol_interface
, agent_handle
, controller_handle
,
1896 if (!handle
|| !protocol
||
1897 (!protocol_interface
&& attributes
!=
1898 EFI_OPEN_PROTOCOL_TEST_PROTOCOL
)) {
1902 EFI_PRINT_GUID("protocol", protocol
);
1904 switch (attributes
) {
1905 case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL
:
1906 case EFI_OPEN_PROTOCOL_GET_PROTOCOL
:
1907 case EFI_OPEN_PROTOCOL_TEST_PROTOCOL
:
1909 case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
:
1910 if (controller_handle
== handle
)
1912 case EFI_OPEN_PROTOCOL_BY_DRIVER
:
1913 case EFI_OPEN_PROTOCOL_BY_DRIVER
| EFI_OPEN_PROTOCOL_EXCLUSIVE
:
1914 if (controller_handle
== NULL
)
1916 case EFI_OPEN_PROTOCOL_EXCLUSIVE
:
1917 if (agent_handle
== NULL
)
1924 list_for_each(lhandle
, &efi_obj_list
) {
1925 struct efi_object
*efiobj
;
1926 efiobj
= list_entry(lhandle
, struct efi_object
, link
);
1928 if (efiobj
->handle
!= handle
)
1931 for (i
= 0; i
< ARRAY_SIZE(efiobj
->protocols
); i
++) {
1932 struct efi_handler
*handler
= &efiobj
->protocols
[i
];
1933 const efi_guid_t
*hprotocol
= handler
->guid
;
1936 if (!guidcmp(hprotocol
, protocol
)) {
1938 EFI_OPEN_PROTOCOL_TEST_PROTOCOL
) {
1939 *protocol_interface
=
1940 handler
->protocol_interface
;
1950 r
= EFI_UNSUPPORTED
;
1956 * Get interface of a protocol on a handle.
1958 * This function implements the HandleProtocol service.
1959 * See the Unified Extensible Firmware Interface (UEFI) specification
1962 * @handle handle on which the protocol shall be opened
1963 * @protocol GUID of the protocol
1964 * @protocol_interface interface implementing the protocol
1965 * @return status code
1967 static efi_status_t EFIAPI
efi_handle_protocol(void *handle
,
1968 const efi_guid_t
*protocol
,
1969 void **protocol_interface
)
1971 return efi_open_protocol(handle
, protocol
, protocol_interface
, NULL
,
1972 NULL
, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL
);
1975 static const struct efi_boot_services efi_boot_services
= {
1977 .headersize
= sizeof(struct efi_table_hdr
),
1979 .raise_tpl
= efi_raise_tpl
,
1980 .restore_tpl
= efi_restore_tpl
,
1981 .allocate_pages
= efi_allocate_pages_ext
,
1982 .free_pages
= efi_free_pages_ext
,
1983 .get_memory_map
= efi_get_memory_map_ext
,
1984 .allocate_pool
= efi_allocate_pool_ext
,
1985 .free_pool
= efi_free_pool_ext
,
1986 .create_event
= efi_create_event_ext
,
1987 .set_timer
= efi_set_timer_ext
,
1988 .wait_for_event
= efi_wait_for_event
,
1989 .signal_event
= efi_signal_event_ext
,
1990 .close_event
= efi_close_event
,
1991 .check_event
= efi_check_event
,
1992 .install_protocol_interface
= efi_install_protocol_interface
,
1993 .reinstall_protocol_interface
= efi_reinstall_protocol_interface
,
1994 .uninstall_protocol_interface
= efi_uninstall_protocol_interface
,
1995 .handle_protocol
= efi_handle_protocol
,
1997 .register_protocol_notify
= efi_register_protocol_notify
,
1998 .locate_handle
= efi_locate_handle_ext
,
1999 .locate_device_path
= efi_locate_device_path
,
2000 .install_configuration_table
= efi_install_configuration_table_ext
,
2001 .load_image
= efi_load_image
,
2002 .start_image
= efi_start_image
,
2004 .unload_image
= efi_unload_image
,
2005 .exit_boot_services
= efi_exit_boot_services
,
2006 .get_next_monotonic_count
= efi_get_next_monotonic_count
,
2008 .set_watchdog_timer
= efi_set_watchdog_timer
,
2009 .connect_controller
= efi_connect_controller
,
2010 .disconnect_controller
= efi_disconnect_controller
,
2011 .open_protocol
= efi_open_protocol
,
2012 .close_protocol
= efi_close_protocol
,
2013 .open_protocol_information
= efi_open_protocol_information
,
2014 .protocols_per_handle
= efi_protocols_per_handle
,
2015 .locate_handle_buffer
= efi_locate_handle_buffer
,
2016 .locate_protocol
= efi_locate_protocol
,
2017 .install_multiple_protocol_interfaces
= efi_install_multiple_protocol_interfaces
,
2018 .uninstall_multiple_protocol_interfaces
= efi_uninstall_multiple_protocol_interfaces
,
2019 .calculate_crc32
= efi_calculate_crc32
,
2020 .copy_mem
= efi_copy_mem
,
2021 .set_mem
= efi_set_mem
,
2025 static uint16_t __efi_runtime_data firmware_vendor
[] =
2026 { 'D','a','s',' ','U','-','b','o','o','t',0 };
2028 struct efi_system_table __efi_runtime_data systab
= {
2030 .signature
= EFI_SYSTEM_TABLE_SIGNATURE
,
2031 .revision
= 0x20005, /* 2.5 */
2032 .headersize
= sizeof(struct efi_table_hdr
),
2034 .fw_vendor
= (long)firmware_vendor
,
2035 .con_in
= (void*)&efi_con_in
,
2036 .con_out
= (void*)&efi_con_out
,
2037 .std_err
= (void*)&efi_con_out
,
2038 .runtime
= (void*)&efi_runtime_services
,
2039 .boottime
= (void*)&efi_boot_services
,
2041 .tables
= (void*)efi_conf_table
,