1 /* 2 * EFI application loader 3 * 4 * Copyright (c) 2016 Alexander Graf 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <part_efi.h> 11 #include <efi_api.h> 12 13 /* No need for efi loader support in SPL */ 14 #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD) 15 16 #include <linux/list.h> 17 18 #define EFI_ENTRY(format, ...) do { \ 19 efi_restore_gd(); \ 20 debug("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \ 21 } while(0) 22 23 #define EFI_EXIT(ret) efi_exit_func(ret); 24 25 extern struct efi_runtime_services efi_runtime_services; 26 extern struct efi_system_table systab; 27 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 extern const struct efi_device_path_to_text_protocol efi_device_path_to_text; 32 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; 37 38 extern unsigned int __efi_runtime_start, __efi_runtime_stop; 39 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; 40 41 /* 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 */ 45 struct efi_handler { 46 const efi_guid_t *guid; 47 void *protocol_interface; 48 }; 49 50 /* 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. 53 * 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 56 */ 57 struct 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 */ 63 void *handle; 64 }; 65 66 /** 67 * struct efi_event 68 * 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 77 */ 78 struct efi_event { 79 u32 type; 80 UINTN notify_tpl; 81 void (EFIAPI *notify_function)(struct efi_event *event, void *context); 82 void *notify_context; 83 u64 trigger_next; 84 u64 trigger_time; 85 enum efi_event_type trigger_type; 86 int signaled; 87 }; 88 89 90 /* This list contains all UEFI objects we know of */ 91 extern struct list_head efi_obj_list; 92 93 /* Called by bootefi to make all disk storage accessible as EFI objects */ 94 int efi_disk_register(void); 95 /* Called by bootefi to make GOP (graphical) interface available */ 96 int efi_gop_register(void); 97 /* Called by bootefi to make the network interface available */ 98 int efi_net_register(void **handle); 99 /* Called by bootefi to make SMBIOS tables available */ 100 void efi_smbios_register(void); 101 102 /* Called by networking code to memorize the dhcp ack package */ 103 void efi_net_set_dhcp_ack(void *pkt, int len); 104 105 /* Called from places to check whether a timer expired */ 106 void efi_timer_check(void); 107 /* PE loader implementation */ 108 void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info); 109 /* Called once to store the pristine gd pointer */ 110 void efi_save_gd(void); 111 /* Called from EFI_ENTRY on callback entry to put gd into the gd register */ 112 void efi_restore_gd(void); 113 /* Called from EFI_EXIT on callback exit to restore the gd register */ 114 efi_status_t efi_exit_func(efi_status_t ret); 115 /* Call this to relocate the runtime section to an address space */ 116 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map); 117 /* Call this to set the current device name */ 118 void efi_set_bootdev(const char *dev, const char *devnr, const char *path); 119 /* Call this to create an event */ 120 efi_status_t efi_create_event(enum efi_event_type type, UINTN notify_tpl, 121 void (EFIAPI *notify_function) ( 122 struct efi_event *event, 123 void *context), 124 void *notify_context, struct efi_event **event); 125 /* Call this to set a timer */ 126 efi_status_t efi_set_timer(struct efi_event *event, int type, 127 uint64_t trigger_time); 128 129 /* Generic EFI memory allocator, call this to get memory */ 130 void *efi_alloc(uint64_t len, int memory_type); 131 /* More specific EFI memory allocator, called by EFI payloads */ 132 efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages, 133 uint64_t *memory); 134 /* EFI memory free function. */ 135 efi_status_t efi_free_pages(uint64_t memory, unsigned long pages); 136 /* EFI memory allocator for small allocations */ 137 efi_status_t efi_allocate_pool(int pool_type, unsigned long size, 138 void **buffer); 139 /* EFI pool memory free function. */ 140 efi_status_t efi_free_pool(void *buffer); 141 /* Returns the EFI memory map */ 142 efi_status_t efi_get_memory_map(unsigned long *memory_map_size, 143 struct efi_mem_desc *memory_map, 144 unsigned long *map_key, 145 unsigned long *descriptor_size, 146 uint32_t *descriptor_version); 147 /* Adds a range into the EFI memory map */ 148 uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type, 149 bool overlap_only_ram); 150 /* Called by board init to initialize the EFI memory map */ 151 int efi_memory_init(void); 152 /* Adds new or overrides configuration table entry to the system table */ 153 efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table); 154 155 #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER 156 extern void *efi_bounce_buffer; 157 #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024) 158 #endif 159 160 /* Convert strings from normal C strings to uEFI strings */ 161 static inline void ascii2unicode(u16 *unicode, const char *ascii) 162 { 163 while (*ascii) 164 *(unicode++) = *(ascii++); 165 } 166 167 /* 168 * Use these to indicate that your code / data should go into the EFI runtime 169 * section and thus still be available when the OS is running 170 */ 171 #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data"))) 172 #define __efi_runtime __attribute__ ((section ("efi_runtime_text"))) 173 174 /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region 175 * to make it available at runtime */ 176 void efi_add_runtime_mmio(void *mmio_ptr, u64 len); 177 178 /* Boards may provide the functions below to implement RTS functionality */ 179 180 void __efi_runtime EFIAPI efi_reset_system( 181 enum efi_reset_type reset_type, 182 efi_status_t reset_status, 183 unsigned long data_size, void *reset_data); 184 void efi_reset_system_init(void); 185 186 efi_status_t __efi_runtime EFIAPI efi_get_time( 187 struct efi_time *time, 188 struct efi_time_cap *capabilities); 189 void efi_get_time_init(void); 190 191 #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */ 192 193 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */ 194 #define __efi_runtime_data 195 #define __efi_runtime 196 static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { } 197 198 /* No loader configured, stub out EFI_ENTRY */ 199 static inline void efi_restore_gd(void) { } 200 static inline void efi_set_bootdev(const char *dev, const char *devnr, 201 const char *path) { } 202 static inline void efi_net_set_dhcp_ack(void *pkt, int len) { } 203 204 #endif 205