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cb149c66 AG |
1 | /* |
2 | * EFI application loader | |
3 | * | |
4 | * Copyright (c) 2016 Alexander Graf | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
bee91169 | 9 | #include <common.h> |
cb149c66 AG |
10 | #include <part_efi.h> |
11 | #include <efi_api.h> | |
bee91169 AG |
12 | |
13 | /* No need for efi loader support in SPL */ | |
14 | #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD) | |
15 | ||
cb149c66 AG |
16 | #include <linux/list.h> |
17 | ||
bee91169 AG |
18 | /* #define DEBUG_EFI */ |
19 | ||
20 | #ifdef DEBUG_EFI | |
21 | #define EFI_ENTRY(format, ...) do { \ | |
22 | efi_restore_gd(); \ | |
23 | printf("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \ | |
24 | } while(0) | |
25 | #else | |
26 | #define EFI_ENTRY(format, ...) do { \ | |
27 | efi_restore_gd(); \ | |
28 | } while(0) | |
29 | #endif | |
30 | ||
31 | #define EFI_EXIT(ret) efi_exit_func(ret); | |
32 | ||
50149ea3 | 33 | extern struct efi_runtime_services efi_runtime_services; |
bee91169 AG |
34 | extern struct efi_system_table systab; |
35 | ||
c1311ad4 AG |
36 | extern const struct efi_simple_text_output_protocol efi_con_out; |
37 | extern const struct efi_simple_input_interface efi_con_in; | |
38 | extern const struct efi_console_control_protocol efi_console_control; | |
39 | ||
40 | extern const efi_guid_t efi_guid_console_control; | |
cb149c66 AG |
41 | extern const efi_guid_t efi_guid_device_path; |
42 | extern const efi_guid_t efi_guid_loaded_image; | |
43 | ||
50149ea3 AG |
44 | extern unsigned int __efi_runtime_start, __efi_runtime_stop; |
45 | extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; | |
46 | ||
bee91169 AG |
47 | /* |
48 | * While UEFI objects can have callbacks, you can also call functions on | |
49 | * protocols (classes) themselves. This struct maps a protocol GUID to its | |
50 | * interface (usually a struct with callback functions). | |
51 | */ | |
52 | struct efi_class_map { | |
53 | const efi_guid_t *guid; | |
54 | const void *interface; | |
55 | }; | |
56 | ||
57 | /* | |
58 | * When the UEFI payload wants to open a protocol on an object to get its | |
59 | * interface (usually a struct with callback functions), this struct maps the | |
60 | * protocol GUID to the respective protocol handler open function for that | |
61 | * object protocol combination. | |
62 | */ | |
63 | struct efi_handler { | |
64 | const efi_guid_t *guid; | |
65 | efi_status_t (EFIAPI *open)(void *handle, | |
66 | efi_guid_t *protocol, void **protocol_interface, | |
67 | void *agent_handle, void *controller_handle, | |
68 | uint32_t attributes); | |
69 | }; | |
70 | ||
71 | /* | |
72 | * UEFI has a poor man's OO model where one "object" can be polymorphic and have | |
73 | * multiple different protocols (classes) attached to it. | |
74 | * | |
75 | * This struct is the parent struct for all of our actual implementation objects | |
76 | * that can include it to make themselves an EFI object | |
77 | */ | |
78 | struct efi_object { | |
79 | /* Every UEFI object is part of a global object list */ | |
80 | struct list_head link; | |
81 | /* We support up to 4 "protocols" an object can be accessed through */ | |
82 | struct efi_handler protocols[4]; | |
83 | /* The object spawner can either use this for data or as identifier */ | |
84 | void *handle; | |
85 | }; | |
86 | ||
87 | /* This list contains all UEFI objects we know of */ | |
88 | extern struct list_head efi_obj_list; | |
89 | ||
2a22d05d AG |
90 | /* Called by bootefi to make all disk storage accessible as EFI objects */ |
91 | int efi_disk_register(void); | |
be8d3241 AG |
92 | /* Called by bootefi to make GOP (graphical) interface available */ |
93 | int efi_gop_register(void); | |
bee91169 AG |
94 | /* |
95 | * Stub implementation for a protocol opener that just returns the handle as | |
96 | * interface | |
97 | */ | |
cb149c66 AG |
98 | efi_status_t efi_return_handle(void *handle, |
99 | efi_guid_t *protocol, void **protocol_interface, | |
100 | void *agent_handle, void *controller_handle, | |
101 | uint32_t attributes); | |
bee91169 AG |
102 | /* Called from places to check whether a timer expired */ |
103 | void efi_timer_check(void); | |
104 | /* PE loader implementation */ | |
cb149c66 | 105 | void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info); |
bee91169 AG |
106 | /* Called once to store the pristine gd pointer */ |
107 | void efi_save_gd(void); | |
108 | /* Called from EFI_ENTRY on callback entry to put gd into the gd register */ | |
109 | void efi_restore_gd(void); | |
110 | /* Called from EFI_EXIT on callback exit to restore the gd register */ | |
111 | efi_status_t efi_exit_func(efi_status_t ret); | |
50149ea3 AG |
112 | /* Call this to relocate the runtime section to an address space */ |
113 | void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map); | |
0f4060eb | 114 | /* Call this to set the current device name */ |
c07ad7c0 | 115 | void efi_set_bootdev(const char *dev, const char *devnr, const char *path); |
50149ea3 | 116 | |
5d00995c AG |
117 | /* Generic EFI memory allocator, call this to get memory */ |
118 | void *efi_alloc(uint64_t len, int memory_type); | |
119 | /* More specific EFI memory allocator, called by EFI payloads */ | |
120 | efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages, | |
121 | uint64_t *memory); | |
122 | /* EFI memory free function. Not implemented today */ | |
123 | efi_status_t efi_free_pages(uint64_t memory, unsigned long pages); | |
124 | /* Returns the EFI memory map */ | |
125 | efi_status_t efi_get_memory_map(unsigned long *memory_map_size, | |
126 | struct efi_mem_desc *memory_map, | |
127 | unsigned long *map_key, | |
128 | unsigned long *descriptor_size, | |
129 | uint32_t *descriptor_version); | |
130 | /* Adds a range into the EFI memory map */ | |
131 | uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type, | |
132 | bool overlap_only_ram); | |
133 | /* Called by board init to initialize the EFI memory map */ | |
134 | int efi_memory_init(void); | |
135 | ||
0f4060eb AG |
136 | /* Convert strings from normal C strings to uEFI strings */ |
137 | static inline void ascii2unicode(u16 *unicode, char *ascii) | |
138 | { | |
139 | while (*ascii) | |
140 | *(unicode++) = *(ascii++); | |
141 | } | |
142 | ||
50149ea3 AG |
143 | /* |
144 | * Use these to indicate that your code / data should go into the EFI runtime | |
145 | * section and thus still be available when the OS is running | |
146 | */ | |
147 | #define EFI_RUNTIME_DATA __attribute__ ((section ("efi_runtime_data"))) | |
148 | #define EFI_RUNTIME_TEXT __attribute__ ((section ("efi_runtime_text"))) | |
bee91169 AG |
149 | |
150 | #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */ | |
151 | ||
50149ea3 AG |
152 | /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */ |
153 | #define EFI_RUNTIME_DATA | |
154 | #define EFI_RUNTIME_TEXT | |
155 | ||
bee91169 AG |
156 | /* No loader configured, stub out EFI_ENTRY */ |
157 | static inline void efi_restore_gd(void) { } | |
c07ad7c0 AG |
158 | static inline void efi_set_bootdev(const char *dev, const char *devnr, |
159 | const char *path) { } | |
bee91169 AG |
160 | |
161 | #endif |