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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 EFI_ENTRY(format, ...) do { \ |
19 | efi_restore_gd(); \ | |
edcef3ba | 20 | debug("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \ |
bee91169 | 21 | } while(0) |
bee91169 AG |
22 | |
23 | #define EFI_EXIT(ret) efi_exit_func(ret); | |
24 | ||
50149ea3 | 25 | extern struct efi_runtime_services efi_runtime_services; |
bee91169 AG |
26 | extern struct efi_system_table systab; |
27 | ||
c1311ad4 AG |
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; | |
31 | ||
32 | extern const efi_guid_t efi_guid_console_control; | |
cb149c66 AG |
33 | extern const efi_guid_t efi_guid_device_path; |
34 | extern const efi_guid_t efi_guid_loaded_image; | |
35 | ||
50149ea3 AG |
36 | extern unsigned int __efi_runtime_start, __efi_runtime_stop; |
37 | extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; | |
38 | ||
bee91169 AG |
39 | /* |
40 | * When the UEFI payload wants to open a protocol on an object to get its | |
41 | * interface (usually a struct with callback functions), this struct maps the | |
b5349f74 | 42 | * protocol GUID to the respective protocol interface */ |
bee91169 AG |
43 | struct efi_handler { |
44 | const efi_guid_t *guid; | |
b5349f74 | 45 | void *protocol_interface; |
bee91169 AG |
46 | }; |
47 | ||
48 | /* | |
49 | * UEFI has a poor man's OO model where one "object" can be polymorphic and have | |
50 | * multiple different protocols (classes) attached to it. | |
51 | * | |
52 | * This struct is the parent struct for all of our actual implementation objects | |
53 | * that can include it to make themselves an EFI object | |
54 | */ | |
55 | struct efi_object { | |
56 | /* Every UEFI object is part of a global object list */ | |
57 | struct list_head link; | |
011f4327 | 58 | /* We support up to 8 "protocols" an object can be accessed through */ |
59 | struct efi_handler protocols[8]; | |
bee91169 AG |
60 | /* The object spawner can either use this for data or as identifier */ |
61 | void *handle; | |
62 | }; | |
63 | ||
64 | /* This list contains all UEFI objects we know of */ | |
65 | extern struct list_head efi_obj_list; | |
66 | ||
2a22d05d AG |
67 | /* Called by bootefi to make all disk storage accessible as EFI objects */ |
68 | int efi_disk_register(void); | |
be8d3241 AG |
69 | /* Called by bootefi to make GOP (graphical) interface available */ |
70 | int efi_gop_register(void); | |
0efe1bcf AG |
71 | /* Called by bootefi to make the network interface available */ |
72 | int efi_net_register(void **handle); | |
e663b350 AG |
73 | /* Called by bootefi to make SMBIOS tables available */ |
74 | void efi_smbios_register(void); | |
0efe1bcf AG |
75 | |
76 | /* Called by networking code to memorize the dhcp ack package */ | |
77 | void efi_net_set_dhcp_ack(void *pkt, int len); | |
78 | ||
bee91169 AG |
79 | /* Called from places to check whether a timer expired */ |
80 | void efi_timer_check(void); | |
81 | /* PE loader implementation */ | |
cb149c66 | 82 | void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info); |
bee91169 AG |
83 | /* Called once to store the pristine gd pointer */ |
84 | void efi_save_gd(void); | |
85 | /* Called from EFI_ENTRY on callback entry to put gd into the gd register */ | |
86 | void efi_restore_gd(void); | |
87 | /* Called from EFI_EXIT on callback exit to restore the gd register */ | |
88 | efi_status_t efi_exit_func(efi_status_t ret); | |
50149ea3 AG |
89 | /* Call this to relocate the runtime section to an address space */ |
90 | void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map); | |
0f4060eb | 91 | /* Call this to set the current device name */ |
c07ad7c0 | 92 | void efi_set_bootdev(const char *dev, const char *devnr, const char *path); |
50149ea3 | 93 | |
5d00995c AG |
94 | /* Generic EFI memory allocator, call this to get memory */ |
95 | void *efi_alloc(uint64_t len, int memory_type); | |
96 | /* More specific EFI memory allocator, called by EFI payloads */ | |
97 | efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages, | |
98 | uint64_t *memory); | |
b61d857b | 99 | /* EFI memory free function. */ |
5d00995c | 100 | efi_status_t efi_free_pages(uint64_t memory, unsigned long pages); |
ead1274b SB |
101 | /* EFI memory allocator for small allocations */ |
102 | efi_status_t efi_allocate_pool(int pool_type, unsigned long size, | |
103 | void **buffer); | |
42417bc8 SB |
104 | /* EFI pool memory free function. */ |
105 | efi_status_t efi_free_pool(void *buffer); | |
5d00995c AG |
106 | /* Returns the EFI memory map */ |
107 | efi_status_t efi_get_memory_map(unsigned long *memory_map_size, | |
108 | struct efi_mem_desc *memory_map, | |
109 | unsigned long *map_key, | |
110 | unsigned long *descriptor_size, | |
111 | uint32_t *descriptor_version); | |
112 | /* Adds a range into the EFI memory map */ | |
113 | uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type, | |
114 | bool overlap_only_ram); | |
115 | /* Called by board init to initialize the EFI memory map */ | |
116 | int efi_memory_init(void); | |
488bf12d AG |
117 | /* Adds new or overrides configuration table entry to the system table */ |
118 | efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table); | |
5d00995c | 119 | |
51735ae0 AG |
120 | #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER |
121 | extern void *efi_bounce_buffer; | |
122 | #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024) | |
123 | #endif | |
124 | ||
0f4060eb | 125 | /* Convert strings from normal C strings to uEFI strings */ |
487d756f | 126 | static inline void ascii2unicode(u16 *unicode, const char *ascii) |
0f4060eb AG |
127 | { |
128 | while (*ascii) | |
129 | *(unicode++) = *(ascii++); | |
130 | } | |
131 | ||
50149ea3 AG |
132 | /* |
133 | * Use these to indicate that your code / data should go into the EFI runtime | |
134 | * section and thus still be available when the OS is running | |
135 | */ | |
3c63db9c AG |
136 | #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data"))) |
137 | #define __efi_runtime __attribute__ ((section ("efi_runtime_text"))) | |
bee91169 | 138 | |
80a4800e AG |
139 | /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region |
140 | * to make it available at runtime */ | |
141 | void efi_add_runtime_mmio(void *mmio_ptr, u64 len); | |
142 | ||
143 | /* Boards may provide the functions below to implement RTS functionality */ | |
144 | ||
3c63db9c | 145 | void __efi_runtime EFIAPI efi_reset_system( |
80a4800e AG |
146 | enum efi_reset_type reset_type, |
147 | efi_status_t reset_status, | |
148 | unsigned long data_size, void *reset_data); | |
149 | void efi_reset_system_init(void); | |
150 | ||
3c63db9c | 151 | efi_status_t __efi_runtime EFIAPI efi_get_time( |
80a4800e AG |
152 | struct efi_time *time, |
153 | struct efi_time_cap *capabilities); | |
154 | void efi_get_time_init(void); | |
155 | ||
bee91169 AG |
156 | #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */ |
157 | ||
50149ea3 | 158 | /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */ |
3c63db9c AG |
159 | #define __efi_runtime_data |
160 | #define __efi_runtime | |
97d01444 | 161 | static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { } |
50149ea3 | 162 | |
bee91169 AG |
163 | /* No loader configured, stub out EFI_ENTRY */ |
164 | static inline void efi_restore_gd(void) { } | |
c07ad7c0 AG |
165 | static inline void efi_set_bootdev(const char *dev, const char *devnr, |
166 | const char *path) { } | |
0efe1bcf | 167 | static inline void efi_net_set_dhcp_ack(void *pkt, int len) { } |
bee91169 AG |
168 | |
169 | #endif |