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