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 const struct efi_simple_input_interface efi_con_in;
30 extern const struct efi_console_control_protocol efi_console_control;
32 extern const efi_guid_t efi_guid_console_control;
33 extern const efi_guid_t efi_guid_device_path;
34 extern const efi_guid_t efi_guid_loaded_image;
36 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
37 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
40 * While UEFI objects can have callbacks, you can also call functions on
41 * protocols (classes) themselves. This struct maps a protocol GUID to its
42 * interface (usually a struct with callback functions).
44 struct efi_class_map {
45 const efi_guid_t *guid;
46 const void *interface;
50 * When the UEFI payload wants to open a protocol on an object to get its
51 * interface (usually a struct with callback functions), this struct maps the
52 * protocol GUID to the respective protocol interface */
54 const efi_guid_t *guid;
55 void *protocol_interface;
59 * UEFI has a poor man's OO model where one "object" can be polymorphic and have
60 * multiple different protocols (classes) attached to it.
62 * This struct is the parent struct for all of our actual implementation objects
63 * that can include it to make themselves an EFI object
66 /* Every UEFI object is part of a global object list */
67 struct list_head link;
68 /* We support up to 4 "protocols" an object can be accessed through */
69 struct efi_handler protocols[4];
70 /* The object spawner can either use this for data or as identifier */
74 /* This list contains all UEFI objects we know of */
75 extern struct list_head efi_obj_list;
77 /* Called by bootefi to make all disk storage accessible as EFI objects */
78 int efi_disk_register(void);
79 /* Called by bootefi to make GOP (graphical) interface available */
80 int efi_gop_register(void);
81 /* Called by bootefi to make the network interface available */
82 int efi_net_register(void **handle);
83 /* Called by bootefi to make SMBIOS tables available */
84 void efi_smbios_register(void);
86 /* Called by networking code to memorize the dhcp ack package */
87 void efi_net_set_dhcp_ack(void *pkt, int len);
89 /* Called from places to check whether a timer expired */
90 void efi_timer_check(void);
91 /* PE loader implementation */
92 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
93 /* Called once to store the pristine gd pointer */
94 void efi_save_gd(void);
95 /* Called from EFI_ENTRY on callback entry to put gd into the gd register */
96 void efi_restore_gd(void);
97 /* Called from EFI_EXIT on callback exit to restore the gd register */
98 efi_status_t efi_exit_func(efi_status_t ret);
99 /* Call this to relocate the runtime section to an address space */
100 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
101 /* Call this to set the current device name */
102 void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
104 /* Generic EFI memory allocator, call this to get memory */
105 void *efi_alloc(uint64_t len, int memory_type);
106 /* More specific EFI memory allocator, called by EFI payloads */
107 efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages,
109 /* EFI memory free function. */
110 efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
111 /* EFI memory allocator for small allocations */
112 efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
114 /* EFI pool memory free function. */
115 efi_status_t efi_free_pool(void *buffer);
116 /* Returns the EFI memory map */
117 efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
118 struct efi_mem_desc *memory_map,
119 unsigned long *map_key,
120 unsigned long *descriptor_size,
121 uint32_t *descriptor_version);
122 /* Adds a range into the EFI memory map */
123 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
124 bool overlap_only_ram);
125 /* Called by board init to initialize the EFI memory map */
126 int efi_memory_init(void);
127 /* Adds new or overrides configuration table entry to the system table */
128 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
130 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
131 extern void *efi_bounce_buffer;
132 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
135 /* Convert strings from normal C strings to uEFI strings */
136 static inline void ascii2unicode(u16 *unicode, const char *ascii)
139 *(unicode++) = *(ascii++);
143 * Use these to indicate that your code / data should go into the EFI runtime
144 * section and thus still be available when the OS is running
146 #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
147 #define __efi_runtime __attribute__ ((section ("efi_runtime_text")))
149 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
150 * to make it available at runtime */
151 void efi_add_runtime_mmio(void *mmio_ptr, u64 len);
153 /* Boards may provide the functions below to implement RTS functionality */
155 void __efi_runtime EFIAPI efi_reset_system(
156 enum efi_reset_type reset_type,
157 efi_status_t reset_status,
158 unsigned long data_size, void *reset_data);
159 void efi_reset_system_init(void);
161 efi_status_t __efi_runtime EFIAPI efi_get_time(
162 struct efi_time *time,
163 struct efi_time_cap *capabilities);
164 void efi_get_time_init(void);
166 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
168 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
169 #define __efi_runtime_data
170 #define __efi_runtime
171 static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { }
173 /* No loader configured, stub out EFI_ENTRY */
174 static inline void efi_restore_gd(void) { }
175 static inline void efi_set_bootdev(const char *dev, const char *devnr,
176 const char *path) { }
177 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }