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 #define EFI_ENTRY(format, ...) do { \
20 debug("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \
23 #define EFI_EXIT(ret) efi_exit_func(ret);
25 extern struct efi_runtime_services efi_runtime_services;
26 extern struct efi_system_table systab;
28 extern const struct efi_simple_text_output_protocol efi_con_out;
29 extern struct efi_simple_input_interface efi_con_in;
30 extern const struct efi_console_control_protocol efi_console_control;
31 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text;
33 extern const efi_guid_t efi_guid_console_control;
34 extern const efi_guid_t efi_guid_device_path;
35 extern const efi_guid_t efi_guid_loaded_image;
36 extern const efi_guid_t efi_guid_device_path_to_text_protocol;
38 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
39 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
42 * When the UEFI payload wants to open a protocol on an object to get its
43 * interface (usually a struct with callback functions), this struct maps the
44 * protocol GUID to the respective protocol interface */
46 const efi_guid_t *guid;
47 void *protocol_interface;
51 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
52 * multiple different protocols (classes) attached to it.
54 * This struct is the parent struct for all of our actual implementation objects
55 * that can include it to make themselves an EFI object
58 /* Every UEFI object is part of a global object list */
59 struct list_head link;
60 /* We support up to 8 "protocols" an object can be accessed through */
61 struct efi_handler protocols[8];
62 /* The object spawner can either use this for data or as identifier */
69 * @type: Type of event, see efi_create_event
70 * @notify_tpl: Task priority level of notifications
71 * @trigger_time: Period of the timer
72 * @trigger_next: Next time to trigger the timer
73 * @nofify_function: Function to call when the event is triggered
74 * @notify_context: Data to be passed to the notify function
75 * @trigger_type: Type of timer, see efi_set_timer
76 * @signaled: The notify function was already called
81 void (EFIAPI *notify_function)(struct efi_event *event, void *context);
85 enum efi_timer_delay trigger_type;
90 /* This list contains all UEFI objects we know of */
91 extern struct list_head efi_obj_list;
93 /* Called by bootefi to make console interface available */
94 int efi_console_register(void);
95 /* Called by bootefi to make all disk storage accessible as EFI objects */
96 int efi_disk_register(void);
97 /* Called by bootefi to make GOP (graphical) interface available */
98 int efi_gop_register(void);
99 /* Called by bootefi to make the network interface available */
100 int efi_net_register(void **handle);
101 /* Called by bootefi to make SMBIOS tables available */
102 void efi_smbios_register(void);
104 /* Called by networking code to memorize the dhcp ack package */
105 void efi_net_set_dhcp_ack(void *pkt, int len);
107 /* Called from places to check whether a timer expired */
108 void efi_timer_check(void);
109 /* PE loader implementation */
110 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
111 /* Called once to store the pristine gd pointer */
112 void efi_save_gd(void);
113 /* Called from EFI_ENTRY on callback entry to put gd into the gd register */
114 void efi_restore_gd(void);
115 /* Called from EFI_EXIT on callback exit to restore the gd register */
116 efi_status_t efi_exit_func(efi_status_t ret);
117 /* Call this to relocate the runtime section to an address space */
118 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
119 /* Call this to set the current device name */
120 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
121 /* Call this to create an event */
122 efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
123 void (EFIAPI *notify_function) (
124 struct efi_event *event,
126 void *notify_context, struct efi_event **event);
127 /* Call this to set a timer */
128 efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
129 uint64_t trigger_time);
130 /* Call this to signal an event */
131 void efi_signal_event(struct efi_event *event);
133 /* Generic EFI memory allocator, call this to get memory */
134 void *efi_alloc(uint64_t len, int memory_type);
135 /* More specific EFI memory allocator, called by EFI payloads */
136 efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages,
138 /* EFI memory free function. */
139 efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
140 /* EFI memory allocator for small allocations */
141 efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
143 /* EFI pool memory free function. */
144 efi_status_t efi_free_pool(void *buffer);
145 /* Returns the EFI memory map */
146 efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
147 struct efi_mem_desc *memory_map,
148 unsigned long *map_key,
149 unsigned long *descriptor_size,
150 uint32_t *descriptor_version);
151 /* Adds a range into the EFI memory map */
152 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
153 bool overlap_only_ram);
154 /* Called by board init to initialize the EFI memory map */
155 int efi_memory_init(void);
156 /* Adds new or overrides configuration table entry to the system table */
157 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
159 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
160 extern void *efi_bounce_buffer;
161 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
164 /* Convert strings from normal C strings to uEFI strings */
165 static inline void ascii2unicode(u16 *unicode, const char *ascii)
168 *(unicode++) = *(ascii++);
171 static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
173 return memcmp(g1, g2, sizeof(efi_guid_t));
177 * Use these to indicate that your code / data should go into the EFI runtime
178 * section and thus still be available when the OS is running
180 #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
181 #define __efi_runtime __attribute__ ((section ("efi_runtime_text")))
183 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
184 * to make it available at runtime */
185 void efi_add_runtime_mmio(void *mmio_ptr, u64 len);
187 /* Boards may provide the functions below to implement RTS functionality */
189 void __efi_runtime EFIAPI efi_reset_system(
190 enum efi_reset_type reset_type,
191 efi_status_t reset_status,
192 unsigned long data_size, void *reset_data);
193 void efi_reset_system_init(void);
195 efi_status_t __efi_runtime EFIAPI efi_get_time(
196 struct efi_time *time,
197 struct efi_time_cap *capabilities);
198 void efi_get_time_init(void);
200 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
202 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
203 #define __efi_runtime_data
204 #define __efi_runtime
205 static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { }
207 /* No loader configured, stub out EFI_ENTRY */
208 static inline void efi_restore_gd(void) { }
209 static inline void efi_set_bootdev(const char *dev, const char *devnr,
210 const char *path) { }
211 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }