2 * EFI application loader
4 * Copyright (c) 2016 Alexander Graf
6 * SPDX-License-Identifier: GPL-2.0+
13 /* No need for efi loader support in SPL */
14 #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)
16 #include <linux/list.h>
18 int __efi_entry_check(void);
19 int __efi_exit_check(void);
20 const char *__efi_nesting(void);
21 const char *__efi_nesting_inc(void);
22 const char *__efi_nesting_dec(void);
25 * Enter the u-boot world from UEFI:
27 #define EFI_ENTRY(format, ...) do { \
28 assert(__efi_entry_check()); \
29 debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \
30 __func__, ##__VA_ARGS__); \
34 * Exit the u-boot world back to UEFI:
36 #define EFI_EXIT(ret) ({ \
37 typeof(ret) _r = ret; \
38 debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \
39 __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \
40 assert(__efi_exit_check()); \
45 * Callback into UEFI world from u-boot:
47 #define EFI_CALL(exp) do { \
48 debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \
49 assert(__efi_exit_check()); \
51 assert(__efi_entry_check()); \
52 debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
58 #define EFI_PRINT_GUID(txt, guid) ({ \
59 debug("%sEFI: %s %pUl\n", __efi_nesting(), txt, guid); \
62 extern struct efi_runtime_services efi_runtime_services;
63 extern struct efi_system_table systab;
65 extern const struct efi_simple_text_output_protocol efi_con_out;
66 extern struct efi_simple_input_interface efi_con_in;
67 extern const struct efi_console_control_protocol efi_console_control;
68 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
70 extern const efi_guid_t efi_guid_console_control;
71 extern const efi_guid_t efi_guid_device_path;
72 extern const efi_guid_t efi_guid_loaded_image;
73 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
75 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
76 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
79 * When the UEFI payload wants to open a protocol on an object to get its
80 * interface (usually a struct with callback functions), this struct maps the
81 * protocol GUID to the respective protocol interface */
83 const efi_guid_t *guid;
84 void *protocol_interface;
88 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
89 * multiple different protocols (classes) attached to it.
91 * This struct is the parent struct for all of our actual implementation objects
92 * that can include it to make themselves an EFI object
95 /* Every UEFI object is part of a global object list */
96 struct list_head link;
97 /* We support up to 8 "protocols" an object can be accessed through */
98 struct efi_handler protocols[8];
99 /* The object spawner can either use this for data or as identifier */
103 #define EFI_PROTOCOL_OBJECT(_guid, _protocol) (struct efi_object){ \
106 .protocol_interface = (void *)(_protocol), \
108 .handle = (void *)(_protocol), \
114 * @type: Type of event, see efi_create_event
115 * @notify_tpl: Task priority level of notifications
116 * @trigger_time: Period of the timer
117 * @trigger_next: Next time to trigger the timer
118 * @nofify_function: Function to call when the event is triggered
119 * @notify_context: Data to be passed to the notify function
120 * @trigger_type: Type of timer, see efi_set_timer
121 * @signaled: The notify function was already called
126 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
127 void *notify_context;
130 enum efi_timer_delay trigger_type;
135 /* This list contains all UEFI objects we know of */
136 extern struct list_head efi_obj_list;
138 /* Called by bootefi to make console interface available */
139 int efi_console_register(void);
140 /* Called by bootefi to make all disk storage accessible as EFI objects */
141 int efi_disk_register(void);
142 /* Called by bootefi to make GOP (graphical) interface available */
143 int efi_gop_register(void);
144 /* Called by bootefi to make the network interface available */
145 int efi_net_register(void **handle);
146 /* Called by bootefi to make SMBIOS tables available */
147 void efi_smbios_register(void);
149 /* Called by networking code to memorize the dhcp ack package */
150 void efi_net_set_dhcp_ack(void *pkt, int len);
152 /* Called from places to check whether a timer expired */
153 void efi_timer_check(void);
154 /* PE loader implementation */
155 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
156 /* Called once to store the pristine gd pointer */
157 void efi_save_gd(void);
158 /* Special case handler for error/abort that just tries to dtrt to get
159 * back to u-boot world */
160 void efi_restore_gd(void);
161 /* Call this to relocate the runtime section to an address space */
162 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
163 /* Call this to set the current device name */
164 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
165 /* Call this to create an event */
166 efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
167 void (EFIAPI *notify_function) (
168 struct efi_event *event,
170 void *notify_context, struct efi_event **event);
171 /* Call this to set a timer */
172 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
173 uint64_t trigger_time);
174 /* Call this to signal an event */
175 void efi_signal_event(struct efi_event *event);
177 /* Generic EFI memory allocator, call this to get memory */
178 void *efi_alloc(uint64_t len, int memory_type);
179 /* More specific EFI memory allocator, called by EFI payloads */
180 efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages,
182 /* EFI memory free function. */
183 efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
184 /* EFI memory allocator for small allocations */
185 efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
187 /* EFI pool memory free function. */
188 efi_status_t efi_free_pool(void *buffer);
189 /* Returns the EFI memory map */
190 efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
191 struct efi_mem_desc *memory_map,
192 unsigned long *map_key,
193 unsigned long *descriptor_size,
194 uint32_t *descriptor_version);
195 /* Adds a range into the EFI memory map */
196 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
197 bool overlap_only_ram);
198 /* Called by board init to initialize the EFI memory map */
199 int efi_memory_init(void);
200 /* Adds new or overrides configuration table entry to the system table */
201 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
203 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
204 extern void *efi_bounce_buffer;
205 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
208 /* Convert strings from normal C strings to uEFI strings */
209 static inline void ascii2unicode(u16 *unicode, const char *ascii)
212 *(unicode++) = *(ascii++);
215 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
217 return memcmp(g1, g2, sizeof(efi_guid_t));
221 * Use these to indicate that your code / data should go into the EFI runtime
222 * section and thus still be available when the OS is running
224 #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
225 #define __efi_runtime __attribute__ ((section ("efi_runtime_text")))
227 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
228 * to make it available at runtime */
229 void efi_add_runtime_mmio(void *mmio_ptr, u64 len);
231 /* Boards may provide the functions below to implement RTS functionality */
233 void __efi_runtime EFIAPI efi_reset_system(
234 enum efi_reset_type reset_type,
235 efi_status_t reset_status,
236 unsigned long data_size, void *reset_data);
237 void efi_reset_system_init(void);
239 efi_status_t __efi_runtime EFIAPI efi_get_time(
240 struct efi_time *time,
241 struct efi_time_cap *capabilities);
242 void efi_get_time_init(void);
244 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
246 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
247 #define __efi_runtime_data
248 #define __efi_runtime
249 static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { }
251 /* No loader configured, stub out EFI_ENTRY */
252 static inline void efi_restore_gd(void) { }
253 static inline void efi_set_bootdev(const char *dev, const char *devnr,
254 const char *path) { }
255 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }