#ifndef _LINUX_EFI_H #define _LINUX_EFI_H /* * Extensible Firmware Interface * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999 * * Copyright (C) 1999 VA Linux Systems * Copyright (C) 1999 Walt Drummond * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. * David Mosberger-Tang * Stephane Eranian */ #include #include #include #include #include #include #include #include #include #include #define EFI_SUCCESS 0 #define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1))) #define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1))) #define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1))) #define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1))) #define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1))) #define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1))) #define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1))) #define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1))) #define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1))) #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1))) #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1))) typedef unsigned long efi_status_t; typedef u8 efi_bool_t; typedef u16 efi_char16_t; /* UNICODE character */ typedef struct { u8 b[16]; } efi_guid_t; #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ ((efi_guid_t) \ {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ (b) & 0xff, ((b) >> 8) & 0xff, \ (c) & 0xff, ((c) >> 8) & 0xff, \ (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) /* * Generic EFI table header */ typedef struct { u64 signature; u32 revision; u32 headersize; u32 crc32; u32 reserved; } efi_table_hdr_t; /* * Memory map descriptor: */ /* Memory types: */ #define EFI_RESERVED_TYPE 0 #define EFI_LOADER_CODE 1 #define EFI_LOADER_DATA 2 #define EFI_BOOT_SERVICES_CODE 3 #define EFI_BOOT_SERVICES_DATA 4 #define EFI_RUNTIME_SERVICES_CODE 5 #define EFI_RUNTIME_SERVICES_DATA 6 #define EFI_CONVENTIONAL_MEMORY 7 #define EFI_UNUSABLE_MEMORY 8 #define EFI_ACPI_RECLAIM_MEMORY 9 #define EFI_ACPI_MEMORY_NVS 10 #define EFI_MEMORY_MAPPED_IO 11 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 #define EFI_PAL_CODE 13 #define EFI_MAX_MEMORY_TYPE 14 /* Attribute values: */ #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ #define EFI_MEMORY_DESCRIPTOR_VERSION 1 #define EFI_PAGE_SHIFT 12 typedef struct { u32 type; u32 pad; u64 phys_addr; u64 virt_addr; u64 num_pages; u64 attribute; } efi_memory_desc_t; typedef struct { efi_guid_t guid; u32 headersize; u32 flags; u32 imagesize; } efi_capsule_header_t; /* * Allocation types for calls to boottime->allocate_pages. */ #define EFI_ALLOCATE_ANY_PAGES 0 #define EFI_ALLOCATE_MAX_ADDRESS 1 #define EFI_ALLOCATE_ADDRESS 2 #define EFI_MAX_ALLOCATE_TYPE 3 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); /* * Types and defines for Time Services */ #define EFI_TIME_ADJUST_DAYLIGHT 0x1 #define EFI_TIME_IN_DAYLIGHT 0x2 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff typedef struct { u16 year; u8 month; u8 day; u8 hour; u8 minute; u8 second; u8 pad1; u32 nanosecond; s16 timezone; u8 daylight; u8 pad2; } efi_time_t; typedef struct { u32 resolution; u32 accuracy; u8 sets_to_zero; } efi_time_cap_t; /* * EFI Boot Services table */ typedef struct { efi_table_hdr_t hdr; void *raise_tpl; void *restore_tpl; void *allocate_pages; void *free_pages; void *get_memory_map; void *allocate_pool; void *free_pool; void *create_event; void *set_timer; void *wait_for_event; void *signal_event; void *close_event; void *check_event; void *install_protocol_interface; void *reinstall_protocol_interface; void *uninstall_protocol_interface; void *handle_protocol; void *__reserved; void *register_protocol_notify; void *locate_handle; void *locate_device_path; void *install_configuration_table; void *load_image; void *start_image; void *exit; void *unload_image; void *exit_boot_services; void *get_next_monotonic_count; void *stall; void *set_watchdog_timer; void *connect_controller; void *disconnect_controller; void *open_protocol; void *close_protocol; void *open_protocol_information; void *protocols_per_handle; void *locate_handle_buffer; void *locate_protocol; void *install_multiple_protocol_interfaces; void *uninstall_multiple_protocol_interfaces; void *calculate_crc32; void *copy_mem; void *set_mem; void *create_event_ex; } efi_boot_services_t; typedef enum { EfiPciIoWidthUint8, EfiPciIoWidthUint16, EfiPciIoWidthUint32, EfiPciIoWidthUint64, EfiPciIoWidthFifoUint8, EfiPciIoWidthFifoUint16, EfiPciIoWidthFifoUint32, EfiPciIoWidthFifoUint64, EfiPciIoWidthFillUint8, EfiPciIoWidthFillUint16, EfiPciIoWidthFillUint32, EfiPciIoWidthFillUint64, EfiPciIoWidthMaximum } EFI_PCI_IO_PROTOCOL_WIDTH; typedef enum { EfiPciIoAttributeOperationGet, EfiPciIoAttributeOperationSet, EfiPciIoAttributeOperationEnable, EfiPciIoAttributeOperationDisable, EfiPciIoAttributeOperationSupported, EfiPciIoAttributeOperationMaximum } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; typedef struct { void *read; void *write; } efi_pci_io_protocol_access_t; typedef struct { void *poll_mem; void *poll_io; efi_pci_io_protocol_access_t mem; efi_pci_io_protocol_access_t io; efi_pci_io_protocol_access_t pci; void *copy_mem; void *map; void *unmap; void *allocate_buffer; void *free_buffer; void *flush; void *get_location; void *attributes; void *get_bar_attributes; void *set_bar_attributes; uint64_t romsize; void *romimage; } efi_pci_io_protocol; #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 /* * Types and defines for EFI ResetSystem */ #define EFI_RESET_COLD 0 #define EFI_RESET_WARM 1 #define EFI_RESET_SHUTDOWN 2 /* * EFI Runtime Services table */ #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL) #define EFI_RUNTIME_SERVICES_REVISION 0x00010000 typedef struct { efi_table_hdr_t hdr; unsigned long get_time; unsigned long set_time; unsigned long get_wakeup_time; unsigned long set_wakeup_time; unsigned long set_virtual_address_map; unsigned long convert_pointer; unsigned long get_variable; unsigned long get_next_variable; unsigned long set_variable; unsigned long get_next_high_mono_count; unsigned long reset_system; unsigned long update_capsule; unsigned long query_capsule_caps; unsigned long query_variable_info; } efi_runtime_services_t; typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc); typedef efi_status_t efi_set_time_t (efi_time_t *tm); typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm); typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm); typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, unsigned long *data_size, void *data); typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor); typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 attr, unsigned long data_size, void *data); typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count); typedef void efi_reset_system_t (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data); typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, unsigned long descriptor_size, u32 descriptor_version, efi_memory_desc_t *virtual_map); typedef efi_status_t efi_query_variable_info_t(u32 attr, u64 *storage_space, u64 *remaining_space, u64 *max_variable_size); typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, unsigned long count, unsigned long sg_list); typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, unsigned long count, u64 *max_size, int *reset_type); /* * EFI Configuration Table and GUID definitions */ #define NULL_GUID \ EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ) #define MPS_TABLE_GUID \ EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) #define ACPI_TABLE_GUID \ EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) #define ACPI_20_TABLE_GUID \ EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 ) #define SMBIOS_TABLE_GUID \ EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) #define SAL_SYSTEM_TABLE_GUID \ EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) #define HCDP_TABLE_GUID \ EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 ) #define UGA_IO_PROTOCOL_GUID \ EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 ) #define EFI_GLOBAL_VARIABLE_GUID \ EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c ) #define UV_SYSTEM_TABLE_GUID \ EFI_GUID( 0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93 ) #define LINUX_EFI_CRASH_GUID \ EFI_GUID( 0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0 ) #define LOADED_IMAGE_PROTOCOL_GUID \ EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) #define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \ EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a ) #define EFI_UGA_PROTOCOL_GUID \ EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 ) #define EFI_PCI_IO_PROTOCOL_GUID \ EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a ) #define EFI_FILE_INFO_ID \ EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) #define EFI_FILE_SYSTEM_GUID \ EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) typedef struct { efi_guid_t guid; u64 table; } efi_config_table_64_t; typedef struct { efi_guid_t guid; u32 table; } efi_config_table_32_t; typedef struct { efi_guid_t guid; unsigned long table; } efi_config_table_t; #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) #define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30)) #define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20)) #define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10)) #define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00)) #define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10)) #define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02)) typedef struct { efi_table_hdr_t hdr; u64 fw_vendor; /* physical addr of CHAR16 vendor string */ u32 fw_revision; u32 __pad1; u64 con_in_handle; u64 con_in; u64 con_out_handle; u64 con_out; u64 stderr_handle; u64 stderr; u64 runtime; u64 boottime; u32 nr_tables; u32 __pad2; u64 tables; } efi_system_table_64_t; typedef struct { efi_table_hdr_t hdr; u32 fw_vendor; /* physical addr of CHAR16 vendor string */ u32 fw_revision; u32 con_in_handle; u32 con_in; u32 con_out_handle; u32 con_out; u32 stderr_handle; u32 stderr; u32 runtime; u32 boottime; u32 nr_tables; u32 tables; } efi_system_table_32_t; typedef struct { efi_table_hdr_t hdr; unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ u32 fw_revision; unsigned long con_in_handle; unsigned long con_in; unsigned long con_out_handle; unsigned long con_out; unsigned long stderr_handle; unsigned long stderr; efi_runtime_services_t *runtime; efi_boot_services_t *boottime; unsigned long nr_tables; unsigned long tables; } efi_system_table_t; struct efi_memory_map { void *phys_map; void *map; void *map_end; int nr_map; unsigned long desc_version; unsigned long desc_size; }; typedef struct { u32 revision; void *parent_handle; efi_system_table_t *system_table; void *device_handle; void *file_path; void *reserved; u32 load_options_size; void *load_options; void *image_base; __aligned_u64 image_size; unsigned int image_code_type; unsigned int image_data_type; unsigned long unload; } efi_loaded_image_t; typedef struct { u64 revision; void *open_volume; } efi_file_io_interface_t; typedef struct { u64 size; u64 file_size; u64 phys_size; efi_time_t create_time; efi_time_t last_access_time; efi_time_t modification_time; __aligned_u64 attribute; efi_char16_t filename[1]; } efi_file_info_t; typedef struct { u64 revision; void *open; void *close; void *delete; void *read; void *write; void *get_position; void *set_position; void *get_info; void *set_info; void *flush; } efi_file_handle_t; #define EFI_FILE_MODE_READ 0x0000000000000001 #define EFI_FILE_MODE_WRITE 0x0000000000000002 #define EFI_FILE_MODE_CREATE 0x8000000000000000 #define EFI_INVALID_TABLE_ADDR (~0UL) /* * All runtime access to EFI goes through this structure: */ extern struct efi { efi_system_table_t *systab; /* EFI system table */ unsigned int runtime_version; /* Runtime services version */ unsigned long mps; /* MPS table */ unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ unsigned long acpi20; /* ACPI table (ACPI 2.0) */ unsigned long smbios; /* SM BIOS table */ unsigned long sal_systab; /* SAL system table */ unsigned long boot_info; /* boot info table */ unsigned long hcdp; /* HCDP table */ unsigned long uga; /* UGA table */ unsigned long uv_systab; /* UV system table */ efi_get_time_t *get_time; efi_set_time_t *set_time; efi_get_wakeup_time_t *get_wakeup_time; efi_set_wakeup_time_t *set_wakeup_time; efi_get_variable_t *get_variable; efi_get_next_variable_t *get_next_variable; efi_set_variable_t *set_variable; efi_query_variable_info_t *query_variable_info; efi_update_capsule_t *update_capsule; efi_query_capsule_caps_t *query_capsule_caps; efi_get_next_high_mono_count_t *get_next_high_mono_count; efi_reset_system_t *reset_system; efi_set_virtual_address_map_t *set_virtual_address_map; } efi; static inline int efi_guidcmp (efi_guid_t left, efi_guid_t right) { return memcmp(&left, &right, sizeof (efi_guid_t)); } static inline char * efi_guid_unparse(efi_guid_t *guid, char *out) { sprintf(out, "%pUl", guid->b); return out; } extern void efi_init (void); extern void *efi_get_pal_addr (void); extern void efi_map_pal_code (void); extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); extern void efi_gettimeofday (struct timespec *ts); extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ #ifdef CONFIG_X86 extern void efi_late_init(void); extern void efi_free_boot_services(void); #else static inline void efi_late_init(void) {} static inline void efi_free_boot_services(void) {} #endif extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); extern u64 efi_get_iobase (void); extern u32 efi_mem_type (unsigned long phys_addr); extern u64 efi_mem_attributes (unsigned long phys_addr); extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size); extern int __init efi_uart_console_only (void); extern void efi_initialize_iomem_resources(struct resource *code_resource, struct resource *data_resource, struct resource *bss_resource); extern unsigned long efi_get_time(void); extern int efi_set_rtc_mmss(unsigned long nowtime); extern void efi_reserve_boot_services(void); extern struct efi_memory_map memmap; /** * efi_range_is_wc - check the WC bit on an address range * @start: starting kvirt address * @len: length of range * * Consult the EFI memory map and make sure it's ok to set this range WC. * Returns true or false. */ static inline int efi_range_is_wc(unsigned long start, unsigned long len) { unsigned long i; for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) { unsigned long paddr = __pa(start + i); if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC)) return 0; } /* The range checked out */ return 1; } #ifdef CONFIG_EFI_PCDP extern int __init efi_setup_pcdp_console(char *); #endif /* * We play games with efi_enabled so that the compiler will, if * possible, remove EFI-related code altogether. */ #define EFI_BOOT 0 /* Were we booted from EFI? */ #define EFI_SYSTEM_TABLES 1 /* Can we use EFI system tables? */ #define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */ #define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */ #define EFI_MEMMAP 4 /* Can we use EFI memory map? */ #define EFI_64BIT 5 /* Is the firmware 64-bit? */ #ifdef CONFIG_EFI # ifdef CONFIG_X86 extern int efi_enabled(int facility); # else static inline int efi_enabled(int facility) { return 1; } # endif #else static inline int efi_enabled(int facility) { return 0; } #endif /* * Variable Attributes */ #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ EFI_VARIABLE_BOOTSERVICE_ACCESS | \ EFI_VARIABLE_RUNTIME_ACCESS | \ EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ EFI_VARIABLE_APPEND_WRITE) /* * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) * not including trailing NUL */ #define EFI_VARIABLE_GUID_LEN 36 /* * The type of search to perform when calling boottime->locate_handle */ #define EFI_LOCATE_ALL_HANDLES 0 #define EFI_LOCATE_BY_REGISTER_NOTIFY 1 #define EFI_LOCATE_BY_PROTOCOL 2 /* * EFI Device Path information */ #define EFI_DEV_HW 0x01 #define EFI_DEV_PCI 1 #define EFI_DEV_PCCARD 2 #define EFI_DEV_MEM_MAPPED 3 #define EFI_DEV_VENDOR 4 #define EFI_DEV_CONTROLLER 5 #define EFI_DEV_ACPI 0x02 #define EFI_DEV_BASIC_ACPI 1 #define EFI_DEV_EXPANDED_ACPI 2 #define EFI_DEV_MSG 0x03 #define EFI_DEV_MSG_ATAPI 1 #define EFI_DEV_MSG_SCSI 2 #define EFI_DEV_MSG_FC 3 #define EFI_DEV_MSG_1394 4 #define EFI_DEV_MSG_USB 5 #define EFI_DEV_MSG_USB_CLASS 15 #define EFI_DEV_MSG_I20 6 #define EFI_DEV_MSG_MAC 11 #define EFI_DEV_MSG_IPV4 12 #define EFI_DEV_MSG_IPV6 13 #define EFI_DEV_MSG_INFINIBAND 9 #define EFI_DEV_MSG_UART 14 #define EFI_DEV_MSG_VENDOR 10 #define EFI_DEV_MEDIA 0x04 #define EFI_DEV_MEDIA_HARD_DRIVE 1 #define EFI_DEV_MEDIA_CDROM 2 #define EFI_DEV_MEDIA_VENDOR 3 #define EFI_DEV_MEDIA_FILE 4 #define EFI_DEV_MEDIA_PROTOCOL 5 #define EFI_DEV_BIOS_BOOT 0x05 #define EFI_DEV_END_PATH 0x7F #define EFI_DEV_END_PATH2 0xFF #define EFI_DEV_END_INSTANCE 0x01 #define EFI_DEV_END_ENTIRE 0xFF struct efi_generic_dev_path { u8 type; u8 sub_type; u16 length; } __attribute ((packed)); static inline void memrange_efi_to_native(u64 *addr, u64 *npages) { *npages = PFN_UP(*addr + (*npages< *b) return 1; if (*a == 0) /* implies *b == 0 */ return 0; a++; b++; len--; } } /* * EFI Variable support. * * Different firmware drivers can expose their EFI-like variables using * the following. */ struct efivar_operations { efi_get_variable_t *get_variable; efi_get_next_variable_t *get_next_variable; efi_set_variable_t *set_variable; efi_query_variable_info_t *query_variable_info; }; struct efivars { /* * ->lock protects two things: * 1) ->list - adds, removals, reads, writes * 2) ops.[gs]et_variable() calls. * It must not be held when creating sysfs entries or calling kmalloc. * ops.get_next_variable() is only called from register_efivars() * or efivar_update_sysfs_entries(), * which is protected by the BKL, so that path is safe. */ spinlock_t lock; struct kset *kset; struct kobject *kobject; const struct efivar_operations *ops; }; /* * The maximum size of VariableName + Data = 1024 * Therefore, it's reasonable to save that much * space in each part of the structure, * and we use a page for reading/writing. */ struct efi_variable { efi_char16_t VariableName[1024/sizeof(efi_char16_t)]; efi_guid_t VendorGuid; unsigned long DataSize; __u8 Data[1024]; efi_status_t Status; __u32 Attributes; } __attribute__((packed)); struct efivar_entry { struct efi_variable var; struct list_head list; struct kobject kobj; }; extern struct list_head efivar_sysfs_list; static inline void efivar_unregister(struct efivar_entry *var) { kobject_put(&var->kobj); } int efivars_register(struct efivars *efivars, const struct efivar_operations *ops, struct kobject *kobject); int efivars_unregister(struct efivars *efivars); struct kobject *efivars_kobject(void); int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *), void *data, bool atomic, bool duplicates, struct list_head *head); void efivar_entry_add(struct efivar_entry *entry, struct list_head *head); void efivar_entry_remove(struct efivar_entry *entry); int __efivar_entry_delete(struct efivar_entry *entry); int efivar_entry_delete(struct efivar_entry *entry); int __efivar_entry_size(struct efivar_entry *entry, unsigned long *size); int efivar_entry_size(struct efivar_entry *entry, unsigned long *size); int efivar_entry_get(struct efivar_entry *entry, u32 *attributes, unsigned long *size, void *data); int efivar_entry_set(struct efivar_entry *entry, u32 attributes, unsigned long size, void *data, struct list_head *head); int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes, unsigned long *size, void *data, bool *set); int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes, bool block, unsigned long size, void *data); void efivar_entry_iter_begin(void); void efivar_entry_iter_end(void); int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *), struct list_head *head, void *data, struct efivar_entry **prev); int efivar_entry_iter(int (*func)(struct efivar_entry *, void *), struct list_head *head, void *data); struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid, struct list_head *head, bool remove); bool efivar_validate(struct efi_variable *var, u8 *data, unsigned long len); void efivar_run_worker(void); int efivars_sysfs_init(void); #endif /* CONFIG_EFI_VARS */ #endif /* _LINUX_EFI_H */