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- /*
- * EFI application loader
- *
- * Copyright (c) 2016 Alexander Graf
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #include <common.h>
- #include <part_efi.h>
- #include <efi_api.h>
- /* No need for efi loader support in SPL */
- #if defined(CONFIG_EFI_LOADER) && !defined(CONFIG_SPL_BUILD)
- #include <linux/list.h>
- #define EFI_ENTRY(format, ...) do { \
- efi_restore_gd(); \
- debug("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \
- } while(0)
- #define EFI_EXIT(ret) efi_exit_func(ret);
- extern struct efi_runtime_services efi_runtime_services;
- extern struct efi_system_table systab;
- extern const struct efi_simple_text_output_protocol efi_con_out;
- extern const struct efi_simple_input_interface efi_con_in;
- extern const struct efi_console_control_protocol efi_console_control;
- extern const efi_guid_t efi_guid_console_control;
- extern const efi_guid_t efi_guid_device_path;
- extern const efi_guid_t efi_guid_loaded_image;
- extern unsigned int __efi_runtime_start, __efi_runtime_stop;
- extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
- /*
- * While UEFI objects can have callbacks, you can also call functions on
- * protocols (classes) themselves. This struct maps a protocol GUID to its
- * interface (usually a struct with callback functions).
- */
- struct efi_class_map {
- const efi_guid_t *guid;
- const void *interface;
- };
- /*
- * When the UEFI payload wants to open a protocol on an object to get its
- * interface (usually a struct with callback functions), this struct maps the
- * protocol GUID to the respective protocol handler open function for that
- * object protocol combination.
- */
- struct efi_handler {
- const efi_guid_t *guid;
- efi_status_t (EFIAPI *open)(void *handle,
- efi_guid_t *protocol, void **protocol_interface,
- void *agent_handle, void *controller_handle,
- uint32_t attributes);
- };
- /*
- * UEFI has a poor man's OO model where one "object" can be polymorphic and have
- * multiple different protocols (classes) attached to it.
- *
- * This struct is the parent struct for all of our actual implementation objects
- * that can include it to make themselves an EFI object
- */
- struct efi_object {
- /* Every UEFI object is part of a global object list */
- struct list_head link;
- /* We support up to 4 "protocols" an object can be accessed through */
- struct efi_handler protocols[4];
- /* The object spawner can either use this for data or as identifier */
- void *handle;
- };
- /* This list contains all UEFI objects we know of */
- extern struct list_head efi_obj_list;
- /* Called by bootefi to make all disk storage accessible as EFI objects */
- int efi_disk_register(void);
- /* Called by bootefi to make GOP (graphical) interface available */
- int efi_gop_register(void);
- /* Called by bootefi to make the network interface available */
- int efi_net_register(void **handle);
- /* Called by bootefi to make SMBIOS tables available */
- void efi_smbios_register(void);
- /* Called by networking code to memorize the dhcp ack package */
- void efi_net_set_dhcp_ack(void *pkt, int len);
- /*
- * Stub implementation for a protocol opener that just returns the handle as
- * interface
- */
- efi_status_t EFIAPI efi_return_handle(void *handle,
- efi_guid_t *protocol, void **protocol_interface,
- void *agent_handle, void *controller_handle,
- uint32_t attributes);
- /* Called from places to check whether a timer expired */
- void efi_timer_check(void);
- /* PE loader implementation */
- void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
- /* Called once to store the pristine gd pointer */
- void efi_save_gd(void);
- /* Called from EFI_ENTRY on callback entry to put gd into the gd register */
- void efi_restore_gd(void);
- /* Called from EFI_EXIT on callback exit to restore the gd register */
- efi_status_t efi_exit_func(efi_status_t ret);
- /* Call this to relocate the runtime section to an address space */
- void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map);
- /* Call this to set the current device name */
- void efi_set_bootdev(const char *dev, const char *devnr, const char *path);
- /* Generic EFI memory allocator, call this to get memory */
- void *efi_alloc(uint64_t len, int memory_type);
- /* More specific EFI memory allocator, called by EFI payloads */
- efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages,
- uint64_t *memory);
- /* EFI memory free function. */
- efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
- /* EFI memory allocator for small allocations */
- efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
- void **buffer);
- /* EFI pool memory free function. */
- efi_status_t efi_free_pool(void *buffer);
- /* Returns the EFI memory map */
- efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
- struct efi_mem_desc *memory_map,
- unsigned long *map_key,
- unsigned long *descriptor_size,
- uint32_t *descriptor_version);
- /* Adds a range into the EFI memory map */
- uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
- bool overlap_only_ram);
- /* Called by board init to initialize the EFI memory map */
- int efi_memory_init(void);
- /* Adds new or overrides configuration table entry to the system table */
- efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table);
- #ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
- extern void *efi_bounce_buffer;
- #define EFI_LOADER_BOUNCE_BUFFER_SIZE (64 * 1024 * 1024)
- #endif
- /* Convert strings from normal C strings to uEFI strings */
- static inline void ascii2unicode(u16 *unicode, const char *ascii)
- {
- while (*ascii)
- *(unicode++) = *(ascii++);
- }
- /*
- * Use these to indicate that your code / data should go into the EFI runtime
- * section and thus still be available when the OS is running
- */
- #define __efi_runtime_data __attribute__ ((section ("efi_runtime_data")))
- #define __efi_runtime __attribute__ ((section ("efi_runtime_text")))
- /* Call this with mmio_ptr as the _pointer_ to a pointer to an MMIO region
- * to make it available at runtime */
- void efi_add_runtime_mmio(void *mmio_ptr, u64 len);
- /* Boards may provide the functions below to implement RTS functionality */
- void __efi_runtime EFIAPI efi_reset_system(
- enum efi_reset_type reset_type,
- efi_status_t reset_status,
- unsigned long data_size, void *reset_data);
- void efi_reset_system_init(void);
- efi_status_t __efi_runtime EFIAPI efi_get_time(
- struct efi_time *time,
- struct efi_time_cap *capabilities);
- void efi_get_time_init(void);
- #else /* defined(EFI_LOADER) && !defined(CONFIG_SPL_BUILD) */
- /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
- #define __efi_runtime_data
- #define __efi_runtime
- static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { }
- /* No loader configured, stub out EFI_ENTRY */
- static inline void efi_restore_gd(void) { }
- static inline void efi_set_bootdev(const char *dev, const char *devnr,
- const char *path) { }
- static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
- #endif
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