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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 | ||
c160d2f5 RC |
18 | int __efi_entry_check(void); |
19 | int __efi_exit_check(void); | |
af65db85 RC |
20 | const char *__efi_nesting_inc(void); |
21 | const char *__efi_nesting_dec(void); | |
c160d2f5 | 22 | |
a095aadf RC |
23 | /* |
24 | * Enter the u-boot world from UEFI: | |
25 | */ | |
bee91169 | 26 | #define EFI_ENTRY(format, ...) do { \ |
c160d2f5 | 27 | assert(__efi_entry_check()); \ |
af65db85 RC |
28 | debug("%sEFI: Entry %s(" format ")\n", __efi_nesting_inc(), \ |
29 | __func__, ##__VA_ARGS__); \ | |
bee91169 | 30 | } while(0) |
bee91169 | 31 | |
a095aadf RC |
32 | /* |
33 | * Exit the u-boot world back to UEFI: | |
34 | */ | |
804b1d73 | 35 | #define EFI_EXIT(ret) ({ \ |
c81883df | 36 | typeof(ret) _r = ret; \ |
af65db85 | 37 | debug("%sEFI: Exit: %s: %u\n", __efi_nesting_dec(), \ |
c81883df | 38 | __func__, (u32)((uintptr_t) _r & ~EFI_ERROR_MASK)); \ |
c160d2f5 RC |
39 | assert(__efi_exit_check()); \ |
40 | _r; \ | |
804b1d73 | 41 | }) |
bee91169 | 42 | |
a095aadf RC |
43 | /* |
44 | * Callback into UEFI world from u-boot: | |
45 | */ | |
46 | #define EFI_CALL(exp) do { \ | |
af65db85 | 47 | debug("%sEFI: Call: %s\n", __efi_nesting_inc(), #exp); \ |
c160d2f5 | 48 | assert(__efi_exit_check()); \ |
a095aadf | 49 | exp; \ |
c160d2f5 | 50 | assert(__efi_entry_check()); \ |
af65db85 | 51 | debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \ |
a095aadf RC |
52 | } while(0) |
53 | ||
50149ea3 | 54 | extern struct efi_runtime_services efi_runtime_services; |
bee91169 AG |
55 | extern struct efi_system_table systab; |
56 | ||
c1311ad4 | 57 | extern const struct efi_simple_text_output_protocol efi_con_out; |
91be9a77 | 58 | extern struct efi_simple_input_interface efi_con_in; |
c1311ad4 | 59 | extern const struct efi_console_control_protocol efi_console_control; |
cc5b7081 | 60 | extern const struct efi_device_path_to_text_protocol efi_device_path_to_text; |
c1311ad4 AG |
61 | |
62 | extern const efi_guid_t efi_guid_console_control; | |
cb149c66 AG |
63 | extern const efi_guid_t efi_guid_device_path; |
64 | extern const efi_guid_t efi_guid_loaded_image; | |
cc5b7081 | 65 | extern const efi_guid_t efi_guid_device_path_to_text_protocol; |
cb149c66 | 66 | |
50149ea3 AG |
67 | extern unsigned int __efi_runtime_start, __efi_runtime_stop; |
68 | extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; | |
69 | ||
bee91169 AG |
70 | /* |
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 | |
b5349f74 | 73 | * protocol GUID to the respective protocol interface */ |
bee91169 AG |
74 | struct efi_handler { |
75 | const efi_guid_t *guid; | |
b5349f74 | 76 | void *protocol_interface; |
bee91169 AG |
77 | }; |
78 | ||
79 | /* | |
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. | |
82 | * | |
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 | |
85 | */ | |
86 | struct efi_object { | |
87 | /* Every UEFI object is part of a global object list */ | |
88 | struct list_head link; | |
011f4327 | 89 | /* We support up to 8 "protocols" an object can be accessed through */ |
90 | struct efi_handler protocols[8]; | |
bee91169 AG |
91 | /* The object spawner can either use this for data or as identifier */ |
92 | void *handle; | |
93 | }; | |
94 | ||
641833db RC |
95 | #define EFI_PROTOCOL_OBJECT(_guid, _protocol) (struct efi_object){ \ |
96 | .protocols = {{ \ | |
97 | .guid = &(_guid), \ | |
98 | .protocol_interface = (void *)(_protocol), \ | |
99 | }}, \ | |
100 | .handle = (void *)(_protocol), \ | |
101 | } | |
102 | ||
c6841592 | 103 | /** |
104 | * struct efi_event | |
105 | * | |
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 | |
114 | */ | |
115 | struct efi_event { | |
b521d29e | 116 | uint32_t type; |
503f2695 | 117 | UINTN notify_tpl; |
c6841592 | 118 | void (EFIAPI *notify_function)(struct efi_event *event, void *context); |
119 | void *notify_context; | |
120 | u64 trigger_next; | |
121 | u64 trigger_time; | |
b521d29e | 122 | enum efi_timer_delay trigger_type; |
c6841592 | 123 | int signaled; |
124 | }; | |
125 | ||
126 | ||
bee91169 AG |
127 | /* This list contains all UEFI objects we know of */ |
128 | extern struct list_head efi_obj_list; | |
129 | ||
91be9a77 | 130 | /* Called by bootefi to make console interface available */ |
131 | int efi_console_register(void); | |
2a22d05d AG |
132 | /* Called by bootefi to make all disk storage accessible as EFI objects */ |
133 | int efi_disk_register(void); | |
be8d3241 AG |
134 | /* Called by bootefi to make GOP (graphical) interface available */ |
135 | int efi_gop_register(void); | |
0efe1bcf AG |
136 | /* Called by bootefi to make the network interface available */ |
137 | int efi_net_register(void **handle); | |
e663b350 AG |
138 | /* Called by bootefi to make SMBIOS tables available */ |
139 | void efi_smbios_register(void); | |
0efe1bcf AG |
140 | |
141 | /* Called by networking code to memorize the dhcp ack package */ | |
142 | void efi_net_set_dhcp_ack(void *pkt, int len); | |
143 | ||
bee91169 AG |
144 | /* Called from places to check whether a timer expired */ |
145 | void efi_timer_check(void); | |
146 | /* PE loader implementation */ | |
cb149c66 | 147 | void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info); |
bee91169 AG |
148 | /* Called once to store the pristine gd pointer */ |
149 | void efi_save_gd(void); | |
c160d2f5 RC |
150 | /* Special case handler for error/abort that just tries to dtrt to get |
151 | * back to u-boot world */ | |
bee91169 | 152 | void efi_restore_gd(void); |
50149ea3 AG |
153 | /* Call this to relocate the runtime section to an address space */ |
154 | void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map); | |
0f4060eb | 155 | /* Call this to set the current device name */ |
c07ad7c0 | 156 | void efi_set_bootdev(const char *dev, const char *devnr, const char *path); |
49deb455 | 157 | /* Call this to create an event */ |
b521d29e | 158 | efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl, |
49deb455 | 159 | void (EFIAPI *notify_function) ( |
160 | struct efi_event *event, | |
161 | void *context), | |
162 | void *notify_context, struct efi_event **event); | |
bfc72462 | 163 | /* Call this to set a timer */ |
b521d29e | 164 | efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type, |
bfc72462 | 165 | uint64_t trigger_time); |
91be9a77 | 166 | /* Call this to signal an event */ |
167 | void efi_signal_event(struct efi_event *event); | |
50149ea3 | 168 | |
5d00995c AG |
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, | |
173 | uint64_t *memory); | |
b61d857b | 174 | /* EFI memory free function. */ |
5d00995c | 175 | efi_status_t efi_free_pages(uint64_t memory, unsigned long pages); |
ead1274b SB |
176 | /* EFI memory allocator for small allocations */ |
177 | efi_status_t efi_allocate_pool(int pool_type, unsigned long size, | |
178 | void **buffer); | |
42417bc8 SB |
179 | /* EFI pool memory free function. */ |
180 | efi_status_t efi_free_pool(void *buffer); | |
5d00995c AG |
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); | |
488bf12d AG |
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); | |
5d00995c | 194 | |
51735ae0 AG |
195 | #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER |
196 | extern void *efi_bounce_buffer; | |
197 | #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024) | |
198 | #endif | |
199 | ||
0f4060eb | 200 | /* Convert strings from normal C strings to uEFI strings */ |
487d756f | 201 | static inline void ascii2unicode(u16 *unicode, const char *ascii) |
0f4060eb AG |
202 | { |
203 | while (*ascii) | |
204 | *(unicode++) = *(ascii++); | |
205 | } | |
206 | ||
3e094c59 RC |
207 | static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2) |
208 | { | |
209 | return memcmp(g1, g2, sizeof(efi_guid_t)); | |
210 | } | |
211 | ||
50149ea3 AG |
212 | /* |
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 | |
215 | */ | |
3c63db9c AG |
216 | #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data"))) |
217 | #define __efi_runtime __attribute__ ((section ("efi_runtime_text"))) | |
bee91169 | 218 | |
80a4800e AG |
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); | |
222 | ||
223 | /* Boards may provide the functions below to implement RTS functionality */ | |
224 | ||
3c63db9c | 225 | void __efi_runtime EFIAPI efi_reset_system( |
80a4800e AG |
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); | |
230 | ||
3c63db9c | 231 | efi_status_t __efi_runtime EFIAPI efi_get_time( |
80a4800e AG |
232 | struct efi_time *time, |
233 | struct efi_time_cap *capabilities); | |
234 | void efi_get_time_init(void); | |
235 | ||
bee91169 AG |
236 | #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */ |
237 | ||
50149ea3 | 238 | /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */ |
3c63db9c AG |
239 | #define __efi_runtime_data |
240 | #define __efi_runtime | |
97d01444 | 241 | static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { } |
50149ea3 | 242 | |
bee91169 AG |
243 | /* No loader configured, stub out EFI_ENTRY */ |
244 | static inline void efi_restore_gd(void) { } | |
c07ad7c0 AG |
245 | static inline void efi_set_bootdev(const char *dev, const char *devnr, |
246 | const char *path) { } | |
0efe1bcf | 247 | static inline void efi_net_set_dhcp_ack(void *pkt, int len) { } |
bee91169 AG |
248 | |
249 | #endif |