summaryrefslogtreecommitdiff
path: root/include/efi_loader.h
blob: 21c03c5c28f88560f4932feff51be25edcda7277 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
/*
 *  EFI application loader
 *
 *  Copyright (c) 2016 Alexander Graf
 *
 *  SPDX-License-Identifier:     GPL-2.0+
 */

#ifndef _EFI_LOADER_H
#define _EFI_LOADER_H 1

#include <common.h>
#include <part_efi.h>
#include <efi_api.h>

/* No need for efi loader support in SPL */
#if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)

#include <linux/list.h>

int __efi_entry_check(void);
int __efi_exit_check(void);
const char *__efi_nesting(void);
const char *__efi_nesting_inc(void);
const char *__efi_nesting_dec(void);

/*
 * Enter the u-boot world from UEFI:
 */
#define EFI_ENTRY(format, ...) do { \
	assert(__efi_entry_check()); \
	debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
		__func__, ##__VA_ARGS__); \
	} while(0)

/*
 * Exit the u-boot world back to UEFI:
 */
#define EFI_EXIT(ret) ({ \
	typeof(ret) _r = ret; \
	debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
		__func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
	assert(__efi_exit_check()); \
	_r; \
	})

/*
 * Call non-void UEFI function from u-boot and retrieve return value:
 */
#define EFI_CALL(exp) ({ \
	debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
	assert(__efi_exit_check()); \
	typeof(exp) _r = exp; \
	assert(__efi_entry_check()); \
	debug("%sEFI: %lu returned by %s\n", __efi_nesting_dec(), \
	      (unsigned long)((uintptr_t)_r & ~EFI_ERROR_MASK), #exp); \
	_r; \
})

/*
 * Call void UEFI function from u-boot:
 */
#define EFI_CALL_VOID(exp) do { \
	debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
	assert(__efi_exit_check()); \
	exp; \
	assert(__efi_entry_check()); \
	debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
	} while(0)

/*
 * Write an indented message with EFI prefix
 */
#define EFI_PRINT(format, ...) ({ \
	debug("%sEFI: " format, __efi_nesting(), \
		##__VA_ARGS__); \
	})

extern struct efi_runtime_services efi_runtime_services;
extern struct efi_system_table systab;

extern struct efi_simple_text_output_protocol efi_con_out;
extern struct efi_simple_input_interface efi_con_in;
extern struct efi_console_control_protocol efi_console_control;
extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;

uint16_t *efi_dp_str(struct efi_device_path *dp);

/* GUID of the EFI_BLOCK_IO_PROTOCOL */
extern const efi_guid_t efi_block_io_guid;
extern const efi_guid_t efi_global_variable_guid;
extern const efi_guid_t efi_guid_console_control;
extern const efi_guid_t efi_guid_device_path;
/* GUID of the EFI_DRIVER_BINDING_PROTOCOL */
extern const efi_guid_t efi_guid_driver_binding_protocol;
extern const efi_guid_t efi_guid_loaded_image;
extern const efi_guid_t efi_guid_device_path_to_text_protocol;
extern const efi_guid_t efi_simple_file_system_protocol_guid;
extern const efi_guid_t efi_file_info_guid;

extern unsigned int __efi_runtime_start, __efi_runtime_stop;
extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;

/*
 * When a protocol is opened a open protocol info entry is created.
 * These are maintained in a list.
 */
struct efi_open_protocol_info_item {
	/* Link to the list of open protocol info entries of a protocol */
	struct list_head link;
	struct efi_open_protocol_info_entry info;
};

/*
 * When the UEFI payload wants to open a protocol on an object to get its
 * interface (usually a struct with callback functions), this struct maps the
 * protocol GUID to the respective protocol interface
 */
struct efi_handler {
	/* Link to the list of protocols of a handle */
	struct list_head link;
	const efi_guid_t *guid;
	void *protocol_interface;
	/* Link to the list of open protocol info items */
	struct list_head open_infos;
};

/*
 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
 * multiple different protocols (classes) attached to it.
 *
 * This struct is the parent struct for all of our actual implementation objects
 * that can include it to make themselves an EFI object
 */
struct efi_object {
	/* Every UEFI object is part of a global object list */
	struct list_head link;
	/* The list of protocols */
	struct list_head protocols;
	/* The object spawner can either use this for data or as identifier */
	void *handle;
};

/**
 * struct efi_event
 *
 * @type:		Type of event, see efi_create_event
 * @notify_tpl:		Task priority level of notifications
 * @trigger_time:	Period of the timer
 * @trigger_next:	Next time to trigger the timer
 * @nofify_function:	Function to call when the event is triggered
 * @notify_context:	Data to be passed to the notify function
 * @trigger_type:	Type of timer, see efi_set_timer
 * @queued:		The notification function is queued
 * @signaled:		The event occurred. The event is in the signaled state.
 */
struct efi_event {
	uint32_t type;
	efi_uintn_t notify_tpl;
	void (EFIAPI *notify_function)(struct efi_event *event, void *context);
	void *notify_context;
	u64 trigger_next;
	u64 trigger_time;
	enum efi_timer_delay trigger_type;
	bool is_queued;
	bool is_signaled;
};


/* This list contains all UEFI objects we know of */
extern struct list_head efi_obj_list;

/* Called by bootefi to make console interface available */
int efi_console_register(void);
/* Called by bootefi to make all disk storage accessible as EFI objects */
int efi_disk_register(void);
/* Create handles and protocols for the partitions of a block device */
int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
			       const char *if_typename, int diskid,
			       const char *pdevname);
/* Called by bootefi to make GOP (graphical) interface available */
int efi_gop_register(void);
/* Called by bootefi to make the network interface available */
int efi_net_register(void);
/* Called by bootefi to make the watchdog available */
int efi_watchdog_register(void);
/* Called by bootefi to make SMBIOS tables available */
void efi_smbios_register(void);

struct efi_simple_file_system_protocol *
efi_fs_from_path(struct efi_device_path *fp);

/* Called by networking code to memorize the dhcp ack package */
void efi_net_set_dhcp_ack(void *pkt, int len);
/* Called by efi_set_watchdog_timer to reset the timer */
efi_status_t efi_set_watchdog(unsigned long timeout);

/* Called from places to check whether a timer expired */
void efi_timer_check(void);
/* PE loader implementation */
void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
/* Called once to store the pristine gd pointer */
void efi_save_gd(void);
/* Special case handler for error/abort that just tries to dtrt to get
 * back to u-boot world */
void efi_restore_gd(void);
/* Call this to relocate the runtime section to an address space */
void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
/* Call this to set the current device name */
void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
/* Add a new object to the object list. */
void efi_add_handle(struct efi_object *obj);
/* Create handle */
efi_status_t efi_create_handle(efi_handle_t *handle);
/* Delete handle */
void efi_delete_handle(struct efi_object *obj);
/* Call this to validate a handle and find the EFI object for it */
struct efi_object *efi_search_obj(const efi_handle_t handle);
/* Find a protocol on a handle */
efi_status_t efi_search_protocol(const efi_handle_t handle,
				 const efi_guid_t *protocol_guid,
				 struct efi_handler **handler);
/* Install new protocol on a handle */
efi_status_t efi_add_protocol(const efi_handle_t handle,
			      const efi_guid_t *protocol,
			      void *protocol_interface);
/* Delete protocol from a handle */
efi_status_t efi_remove_protocol(const efi_handle_t handle,
				 const efi_guid_t *protocol,
				 void *protocol_interface);
/* Delete all protocols from a handle */
efi_status_t efi_remove_all_protocols(const efi_handle_t handle);
/* Call this to create an event */
efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
			      void (EFIAPI *notify_function) (
					struct efi_event *event,
					void *context),
			      void *notify_context, struct efi_event **event);
/* Call this to set a timer */
efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
			   uint64_t trigger_time);
/* Call this to signal an event */
void efi_signal_event(struct efi_event *event, bool check_tpl);

/* open file system: */
struct efi_simple_file_system_protocol *efi_simple_file_system(
		struct blk_desc *desc, int part, struct efi_device_path *dp);

/* open file from device-path: */
struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp);


/* Generic EFI memory allocator, call this to get memory */
void *efi_alloc(uint64_t len, int memory_type);
/* More specific EFI memory allocator, called by EFI payloads */
efi_status_t efi_allocate_pages(int type, int memory_type, efi_uintn_t pages,
				uint64_t *memory);
/* EFI memory free function. */
efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages);
/* EFI memory allocator for small allocations */
efi_status_t efi_allocate_pool(int pool_type, efi_uintn_t size,
			       void **buffer);
/* EFI pool memory free function. */
efi_status_t efi_free_pool(void *buffer);
/* Returns the EFI memory map */
efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
				struct efi_mem_desc *memory_map,
				efi_uintn_t *map_key,
				efi_uintn_t *descriptor_size,
				uint32_t *descriptor_version);
/* Adds a range into the EFI memory map */
uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
			    bool overlap_only_ram);
/* Called by board init to initialize the EFI drivers */
int efi_driver_init(void);
/* Called by board init to initialize the EFI memory map */
int efi_memory_init(void);
/* Adds new or overrides configuration table entry to the system table */
efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
/* Sets up a loaded image */
efi_status_t efi_setup_loaded_image(
			struct efi_loaded_image *info, struct efi_object *obj,
			struct efi_device_path *device_path,
			struct efi_device_path *file_path);
efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
				      void **buffer);

#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
extern void *efi_bounce_buffer;
#define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
#endif


struct efi_device_path *efi_dp_next(const struct efi_device_path *dp);
int efi_dp_match(const struct efi_device_path *a,
		 const struct efi_device_path *b);
struct efi_object *efi_dp_find_obj(struct efi_device_path *dp,
				   struct efi_device_path **rem);
unsigned efi_dp_size(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp);
struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
				      const struct efi_device_path *dp2);
struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
					   const struct efi_device_path *node);


struct efi_device_path *efi_dp_from_dev(struct udevice *dev);
struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part);
/* Create a device node for a block device partition. */
struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part);
struct efi_device_path *efi_dp_from_file(struct blk_desc *desc, int part,
					 const char *path);
struct efi_device_path *efi_dp_from_eth(void);
struct efi_device_path *efi_dp_from_mem(uint32_t mem_type,
					uint64_t start_address,
					uint64_t end_address);
/* Determine the last device path node that is not the end node. */
const struct efi_device_path *efi_dp_last_node(
			const struct efi_device_path *dp);
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
				    struct efi_device_path **device_path,
				    struct efi_device_path **file_path);

#define EFI_DP_TYPE(_dp, _type, _subtype) \
	(((_dp)->type == DEVICE_PATH_TYPE_##_type) && \
	 ((_dp)->sub_type == DEVICE_PATH_SUB_TYPE_##_subtype))

/* Convert strings from normal C strings to uEFI strings */
static inline void ascii2unicode(u16 *unicode, const char *ascii)
{
	while (*ascii)
		*(unicode++) = *(ascii++);
}

static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
{
	return memcmp(g1, g2, sizeof(efi_guid_t));
}

/*
 * Use these to indicate that your code / data should go into the EFI runtime
 * section and thus still be available when the OS is running
 */
#define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
#define __efi_runtime __attribute__ ((section ("efi_runtime_text")))

/* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
 * to make it available at runtime */
void efi_add_runtime_mmio(void *mmio_ptr, u64 len);

/* Boards may provide the functions below to implement RTS functionality */

void __efi_runtime EFIAPI efi_reset_system(
			enum efi_reset_type reset_type,
			efi_status_t reset_status,
			unsigned long data_size, void *reset_data);
void efi_reset_system_init(void);

efi_status_t __efi_runtime EFIAPI efi_get_time(
			struct efi_time *time,
			struct efi_time_cap *capabilities);
void efi_get_time_init(void);

#ifdef CONFIG_CMD_BOOTEFI_SELFTEST
/*
 * Entry point for the tests of the EFI API.
 * It is called by 'bootefi selftest'
 */
efi_status_t EFIAPI efi_selftest(efi_handle_t image_handle,
				 struct efi_system_table *systab);
#endif

efi_status_t EFIAPI efi_get_variable(s16 *variable_name,
		efi_guid_t *vendor, u32 *attributes,
		unsigned long *data_size, void *data);
efi_status_t EFIAPI efi_get_next_variable(
		unsigned long *variable_name_size,
		s16 *variable_name, efi_guid_t *vendor);
efi_status_t EFIAPI efi_set_variable(s16 *variable_name,
		efi_guid_t *vendor, u32 attributes,
		unsigned long data_size, void *data);

void *efi_bootmgr_load(struct efi_device_path **device_path,
		       struct efi_device_path **file_path);

#else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */

/* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
#define __efi_runtime_data
#define __efi_runtime
static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { }

/* No loader configured, stub out EFI_ENTRY */
static inline void efi_restore_gd(void) { }
static inline void efi_set_bootdev(const char *dev, const char *devnr,
				   const char *path) { }
static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }

#endif /* CONFIG_EFI_LOADER && !CONFIG_SPL_BUILD */

#endif /* _EFI_LOADER_H */