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