/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H #include <linux/compiler.h> #include <linux/efi.h> #include <linux/kernel.h> #include <linux/kern_levels.h> #include <linux/types.h> #include <asm/efi.h> /* * __init annotations should not be used in the EFI stub, since the code is * either included in the decompressor (x86, ARM) where they have no effect, * or the whole stub is __init annotated at the section level (arm64), by * renaming the sections, in which case the __init annotation will be * redundant, and will result in section names like .init.init.text, and our * linker script does not expect that. */ #undef __init /* * Allow the platform to override the allocation granularity: this allows * systems that have the capability to run with a larger page size to deal * with the allocations for initrd and fdt more efficiently. */ #ifndef EFI_ALLOC_ALIGN #define EFI_ALLOC_ALIGN … #endif #ifndef EFI_ALLOC_LIMIT #define EFI_ALLOC_LIMIT … #endif extern bool efi_no5lvl; extern bool efi_nochunk; extern bool efi_nokaslr; extern int efi_loglevel; extern int efi_mem_encrypt; extern bool efi_novamap; extern const efi_system_table_t *efi_system_table; efi_dxe_services_table_t; extern const efi_dxe_services_table_t *efi_dxe_table; efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg); #ifndef ARCH_HAS_EFISTUB_WRAPPERS #define efi_is_native … #define efi_table_attr … #define efi_fn_call … #endif #define efi_call_proto(inst, func, ...) … #define efi_bs_call(func, ...) … #define efi_rt_call(func, ...) … #define efi_dxe_call(func, ...) … #define efi_info(fmt, ...) … #define efi_warn(fmt, ...) … #define efi_err(fmt, ...) … #define efi_debug(fmt, ...) … #define efi_printk_once(fmt, ...) … #define efi_info_once(fmt, ...) … #define efi_warn_once(fmt, ...) … #define efi_err_once(fmt, ...) … #define efi_debug_once(fmt, ...) … /* Helper macros for the usual case of using simple C variables: */ #ifndef fdt_setprop_inplace_var #define fdt_setprop_inplace_var(fdt, node_offset, name, var) … #endif #ifndef fdt_setprop_var #define fdt_setprop_var(fdt, node_offset, name, var) … #endif #define get_efi_var(name, vendor, ...) … #define set_efi_var(name, vendor, ...) … #define efi_get_handle_at(array, idx) … #define efi_get_handle_num(size) … #define for_each_efi_handle(handle, array, size, i) … static inline void efi_set_u64_split(u64 data, u32 *lo, u32 *hi) { … } /* * Allocation types for calls to boottime->allocate_pages. */ #define EFI_ALLOCATE_ANY_PAGES … #define EFI_ALLOCATE_MAX_ADDRESS … #define EFI_ALLOCATE_ADDRESS … #define EFI_MAX_ALLOCATE_TYPE … /* * The type of search to perform when calling boottime->locate_handle */ #define EFI_LOCATE_ALL_HANDLES … #define EFI_LOCATE_BY_REGISTER_NOTIFY … #define EFI_LOCATE_BY_PROTOCOL … /* * boottime->stall takes the time period in microseconds */ #define EFI_USEC_PER_SEC … /* * boottime->set_timer takes the time in 100ns units */ #define EFI_100NSEC_PER_USEC … /* * An efi_boot_memmap is used by efi_get_memory_map() to return the * EFI memory map in a dynamically allocated buffer. * * The buffer allocated for the EFI memory map includes extra room for * a minimum of EFI_MMAP_NR_SLACK_SLOTS additional EFI memory descriptors. * This facilitates the reuse of the EFI memory map buffer when a second * call to ExitBootServices() is needed because of intervening changes to * the EFI memory map. Other related structures, e.g. x86 e820ext, need * to factor in this headroom requirement as well. */ #define EFI_MMAP_NR_SLACK_SLOTS … efi_device_path_protocol_t; efi_device_path_to_text_protocol; efi_device_path_to_text_protocol_t; efi_device_path_from_text_protocol; efi_device_path_from_text_protocol_t; efi_event_t; /* Note that notifications won't work in mixed mode */ efi_event_notify_t void …); #define EFI_EVT_TIMER … #define EFI_EVT_RUNTIME … #define EFI_EVT_NOTIFY_WAIT … #define EFI_EVT_NOTIFY_SIGNAL … /** * efi_set_event_at() - add event to events array * * @events: array of UEFI events * @ids: index where to put the event in the array * @event: event to add to the aray * * boottime->wait_for_event() takes an array of events as input. * Provide a helper to set it up correctly for mixed mode. */ static inline void efi_set_event_at(efi_event_t *events, size_t idx, efi_event_t event) { … } #define EFI_TPL_APPLICATION … #define EFI_TPL_CALLBACK … #define EFI_TPL_NOTIFY … #define EFI_TPL_HIGH_LEVEL … EFI_TIMER_DELAY; /* * EFI Boot Services table */ efi_boot_services; efi_gcd_memory_type_t; efi_gcd_memory_space_desc_t; /* * EFI DXE Services table */ efi_dxe_services_table; efi_memory_attribute_protocol_t; efi_memory_attribute_protocol; efi_uga_draw_protocol_t; efi_uga_draw_protocol; efi_input_key_t; efi_simple_text_input_protocol; efi_status_t efi_wait_for_key(unsigned long usec, efi_input_key_t *key); efi_simple_text_output_protocol; #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR … #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR … #define PIXEL_BIT_MASK … #define PIXEL_BLT_ONLY … #define PIXEL_FORMAT_MAX … efi_pixel_bitmask_t; efi_graphics_output_mode_info_t; efi_graphics_output_protocol_mode_t; efi_graphics_output_protocol_mode; efi_graphics_output_protocol_t; efi_graphics_output_protocol; efi_loaded_image_t; efi_file_info_t; efi_file_protocol_t; efi_file_protocol; efi_simple_file_system_protocol_t; efi_simple_file_system_protocol; #define EFI_FILE_MODE_READ … #define EFI_FILE_MODE_WRITE … #define EFI_FILE_MODE_CREATE … EFI_PCI_IO_PROTOCOL_WIDTH; EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; efi_pci_io_protocol_access_32_t; efi_pci_io_protocol_t; efi_pci_io_protocol_cfg_t buffer); efi_pci_io_protocol_access_t; efi_pci_io_protocol_config_access_t; efi_pci_io_protocol; #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO … #define EFI_PCI_IO_ATTRIBUTE_ISA_IO … #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO … #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY … #define EFI_PCI_IO_ATTRIBUTE_VGA_IO … #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO … #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO … #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE … #define EFI_PCI_IO_ATTRIBUTE_IO … #define EFI_PCI_IO_ATTRIBUTE_MEMORY … #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER … #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED … #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE … #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE … #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM … #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE … #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 … #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 … #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 … struct efi_dev_path; apple_properties_protocol_t; apple_properties_protocol; efi_tcg2_event_log_format; #define INITRD_EVENT_TAG_ID … #define LOAD_OPTIONS_EVENT_TAG_ID … #define EV_EVENT_TAG … #define EFI_TCG2_EVENT_HEADER_VERSION … struct efi_tcg2_event { … } __packed; /* from TCG PC Client Platform Firmware Profile Specification */ TCG_PCClientTaggedEvent; efi_tcg2_event_t; efi_tcg2_protocol_t; efi_tcg2_protocol; efi_cc_version_t; efi_cc_type_t; /* EFI CC type/subtype defines */ #define EFI_CC_TYPE_NONE … #define EFI_CC_TYPE_AMD_SEV … #define EFI_CC_TYPE_INTEL_TDX … efi_cc_mr_index_t; struct efi_cc_event { … } __packed; efi_cc_event_t; efi_cc_event_log_bitmap_t; efi_cc_event_log_format_t; efi_cc_event_algorithm_bitmap_t; efi_cc_boot_service_cap_t; #define EFI_CC_EVENT_HEADER_VERSION … #define EFI_CC_BOOT_HASH_ALG_SHA384 … #define EFI_CC_EVENT_LOG_FORMAT_TCG_2 … efi_cc_protocol_t; efi_cc_protocol; struct riscv_efi_boot_protocol { … }; efi_load_file_protocol_t; efi_load_file2_protocol_t; efi_load_file_protocol; efi_load_option_t; #define EFI_LOAD_OPTION_ACTIVE … #define EFI_LOAD_OPTION_FORCE_RECONNECT … #define EFI_LOAD_OPTION_HIDDEN … #define EFI_LOAD_OPTION_CATEGORY … #define EFI_LOAD_OPTION_CATEGORY_BOOT … #define EFI_LOAD_OPTION_CATEGORY_APP … #define EFI_LOAD_OPTION_BOOT_MASK … #define EFI_LOAD_OPTION_MASK … efi_load_option_unpacked_t; void efi_pci_disable_bridge_busmaster(void); efi_exit_boot_map_processing; efi_status_t efi_exit_boot_services(void *handle, void *priv, efi_exit_boot_map_processing priv_func); efi_status_t efi_boot_kernel(void *handle, efi_loaded_image_t *image, unsigned long kernel_addr, char *cmdline_ptr); void *get_fdt(unsigned long *fdt_size); efi_status_t efi_alloc_virtmap(efi_memory_desc_t **virtmap, unsigned long *desc_size, u32 *desc_ver); void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, unsigned long desc_size, efi_memory_desc_t *runtime_map, int *count); efi_status_t efi_get_random_bytes(unsigned long size, u8 *out); efi_status_t efi_random_alloc(unsigned long size, unsigned long align, unsigned long *addr, unsigned long random_seed, int memory_type, unsigned long alloc_min, unsigned long alloc_max); efi_status_t efi_random_get_seed(void); efi_status_t check_platform_features(void); void *get_efi_config_table(efi_guid_t guid); /* NOTE: These functions do not print a trailing newline after the string */ void efi_char16_puts(efi_char16_t *); void efi_puts(const char *str); __printf(1, 2) int efi_printk(char const *fmt, ...); void efi_free(unsigned long size, unsigned long addr); void efi_apply_loadoptions_quirk(const void **load_options, u32 *load_options_size); char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len); efi_status_t efi_get_memory_map(struct efi_boot_memmap **map, bool install_cfg_tbl); efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr, unsigned long max); efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr, unsigned long max, unsigned long align, int memory_type); efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, unsigned long *addr, unsigned long min); efi_status_t efi_relocate_kernel(unsigned long *image_addr, unsigned long image_size, unsigned long alloc_size, unsigned long preferred_addr, unsigned long alignment, unsigned long min_addr); efi_status_t efi_parse_options(char const *cmdline); void efi_parse_option_graphics(char *option); efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto, unsigned long size); efi_status_t handle_cmdline_files(efi_loaded_image_t *image, const efi_char16_t *optstr, int optstr_size, unsigned long soft_limit, unsigned long hard_limit, unsigned long *load_addr, unsigned long *load_size); static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image, unsigned long *load_addr, unsigned long *load_size) { … } efi_status_t efi_load_initrd(efi_loaded_image_t *image, unsigned long soft_limit, unsigned long hard_limit, const struct linux_efi_initrd **out); /* * This function handles the architcture specific differences between arm and * arm64 regarding where the kernel image must be loaded and any memory that * must be reserved. On failure it is required to free all * all allocations it has made. */ efi_status_t handle_kernel_image(unsigned long *image_addr, unsigned long *image_size, unsigned long *reserve_addr, unsigned long *reserve_size, efi_loaded_image_t *image, efi_handle_t image_handle); /* shared entrypoint between the normal stub and the zboot stub */ efi_status_t efi_stub_common(efi_handle_t handle, efi_loaded_image_t *image, unsigned long image_addr, char *cmdline_ptr); efi_status_t efi_handle_cmdline(efi_loaded_image_t *image, char **cmdline_ptr); asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint, unsigned long fdt_addr, unsigned long fdt_size); void efi_handle_post_ebs_state(void); enum efi_secureboot_mode efi_get_secureboot(void); #ifdef CONFIG_RESET_ATTACK_MITIGATION void efi_enable_reset_attack_mitigation(void); #else static inline void efi_enable_reset_attack_mitigation(void) { } #endif void efi_retrieve_eventlog(void); struct screen_info *alloc_screen_info(void); struct screen_info *__alloc_screen_info(void); void free_screen_info(struct screen_info *si); void efi_cache_sync_image(unsigned long image_base, unsigned long alloc_size); struct efi_smbios_record { … }; const struct efi_smbios_record *efi_get_smbios_record(u8 type); struct efi_smbios_type1_record { … }; struct efi_smbios_type4_record { … }; #define efi_get_smbios_string(__record, __field) … const u8 *__efi_get_smbios_string(const struct efi_smbios_record *record, const u8 *offset); void efi_remap_image(unsigned long image_base, unsigned alloc_size, unsigned long code_size); efi_status_t efi_kaslr_relocate_kernel(unsigned long *image_addr, unsigned long *reserve_addr, unsigned long *reserve_size, unsigned long kernel_size, unsigned long kernel_codesize, unsigned long kernel_memsize, u32 phys_seed); u32 efi_kaslr_get_phys_seed(efi_handle_t image_handle); asmlinkage efi_status_t __efiapi efi_zboot_entry(efi_handle_t handle, efi_system_table_t *systab); efi_status_t allocate_unaccepted_bitmap(__u32 nr_desc, struct efi_boot_memmap *map); void process_unaccepted_memory(u64 start, u64 end); void accept_memory(phys_addr_t start, unsigned long size); void arch_accept_memory(phys_addr_t start, phys_addr_t end); #endif
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