diff options
Diffstat (limited to 'include/efi.h')
| -rw-r--r-- | include/efi.h | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/include/efi.h b/include/efi.h new file mode 100644 index 0000000..5f415a9 --- /dev/null +++ b/include/efi.h @@ -0,0 +1,490 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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 <drummond@valinux.com> + * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. + * David Mosberger-Tang <davidm@hpl.hp.com> + * Stephane Eranian <eranian@hpl.hp.com> + * + * From include/linux/efi.h in kernel 4.1 with some additions/subtractions + */ + +#ifndef _EFI_H +#define _EFI_H + +#include <linux/linkage.h> +#include <linux/string.h> +#include <linux/types.h> + +/* + * EFI on x86_64 uses the Microsoft ABI which is not the default for GCC. + * + * There are two scenarios for EFI on x86_64: building a 64-bit EFI stub + * codes (CONFIG_EFI_STUB_64BIT) and building a 64-bit U-Boot (CONFIG_X86_64). + * Either needs to be properly built with the '-m64' compiler flag, and hence + * it is enough to only check the compiler provided define __x86_64__ here. + */ +#ifdef __x86_64__ +#define EFIAPI __attribute__((ms_abi)) +#define efi_va_list __builtin_ms_va_list +#define efi_va_start __builtin_ms_va_start +#define efi_va_arg __builtin_va_arg +#define efi_va_end __builtin_ms_va_end +#else +#define EFIAPI asmlinkage +#define efi_va_list va_list +#define efi_va_start va_start +#define efi_va_arg va_arg +#define efi_va_end va_end +#endif /* __x86_64__ */ + +#define EFI32_LOADER_SIGNATURE "EL32" +#define EFI64_LOADER_SIGNATURE "EL64" + +struct efi_device_path; + +typedef struct { + u8 b[16]; +} efi_guid_t __attribute__((aligned(8))); + +#define EFI_BITS_PER_LONG (sizeof(long) * 8) + +/* Bit mask for EFI status code with error */ +#define EFI_ERROR_MASK (1UL << (EFI_BITS_PER_LONG - 1)) +/* Status codes returned by EFI protocols */ +#define EFI_SUCCESS 0 +#define EFI_LOAD_ERROR (EFI_ERROR_MASK | 1) +#define EFI_INVALID_PARAMETER (EFI_ERROR_MASK | 2) +#define EFI_UNSUPPORTED (EFI_ERROR_MASK | 3) +#define EFI_BAD_BUFFER_SIZE (EFI_ERROR_MASK | 4) +#define EFI_BUFFER_TOO_SMALL (EFI_ERROR_MASK | 5) +#define EFI_NOT_READY (EFI_ERROR_MASK | 6) +#define EFI_DEVICE_ERROR (EFI_ERROR_MASK | 7) +#define EFI_WRITE_PROTECTED (EFI_ERROR_MASK | 8) +#define EFI_OUT_OF_RESOURCES (EFI_ERROR_MASK | 9) +#define EFI_VOLUME_CORRUPTED (EFI_ERROR_MASK | 10) +#define EFI_VOLUME_FULL (EFI_ERROR_MASK | 11) +#define EFI_NO_MEDIA (EFI_ERROR_MASK | 12) +#define EFI_MEDIA_CHANGED (EFI_ERROR_MASK | 13) +#define EFI_NOT_FOUND (EFI_ERROR_MASK | 14) +#define EFI_ACCESS_DENIED (EFI_ERROR_MASK | 15) +#define EFI_NO_RESPONSE (EFI_ERROR_MASK | 16) +#define EFI_NO_MAPPING (EFI_ERROR_MASK | 17) +#define EFI_TIMEOUT (EFI_ERROR_MASK | 18) +#define EFI_NOT_STARTED (EFI_ERROR_MASK | 19) +#define EFI_ALREADY_STARTED (EFI_ERROR_MASK | 20) +#define EFI_ABORTED (EFI_ERROR_MASK | 21) +#define EFI_ICMP_ERROR (EFI_ERROR_MASK | 22) +#define EFI_TFTP_ERROR (EFI_ERROR_MASK | 23) +#define EFI_PROTOCOL_ERROR (EFI_ERROR_MASK | 24) +#define EFI_INCOMPATIBLE_VERSION (EFI_ERROR_MASK | 25) +#define EFI_SECURITY_VIOLATION (EFI_ERROR_MASK | 26) +#define EFI_CRC_ERROR (EFI_ERROR_MASK | 27) +#define EFI_END_OF_MEDIA (EFI_ERROR_MASK | 28) +#define EFI_END_OF_FILE (EFI_ERROR_MASK | 31) +#define EFI_INVALID_LANGUAGE (EFI_ERROR_MASK | 32) +#define EFI_COMPROMISED_DATA (EFI_ERROR_MASK | 33) +#define EFI_IP_ADDRESS_CONFLICT (EFI_ERROR_MASK | 34) +#define EFI_HTTP_ERROR (EFI_ERROR_MASK | 35) + +#define EFI_WARN_DELETE_FAILURE 2 + +typedef unsigned long efi_status_t; +typedef u64 efi_physical_addr_t; +typedef u64 efi_virtual_addr_t; +typedef struct efi_object *efi_handle_t; + +#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ + {{ (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 */ +struct efi_table_hdr { + u64 signature; + u32 revision; + u32 headersize; + u32 crc32; + u32 reserved; +}; + +/* Enumeration of memory types introduced in UEFI */ +enum efi_mem_type { + EFI_RESERVED_MEMORY_TYPE, + /* + * The code portions of a loaded application. + * (Note that UEFI OS loaders are UEFI applications.) + */ + EFI_LOADER_CODE, + /* + * The data portions of a loaded application and + * the default data allocation type used by an application + * to allocate pool memory. + */ + EFI_LOADER_DATA, + /* The code portions of a loaded Boot Services Driver */ + EFI_BOOT_SERVICES_CODE, + /* + * The data portions of a loaded Boot Services Driver and + * the default data allocation type used by a Boot Services + * Driver to allocate pool memory. + */ + EFI_BOOT_SERVICES_DATA, + /* The code portions of a loaded Runtime Services Driver */ + EFI_RUNTIME_SERVICES_CODE, + /* + * The data portions of a loaded Runtime Services Driver and + * the default data allocation type used by a Runtime Services + * Driver to allocate pool memory. + */ + EFI_RUNTIME_SERVICES_DATA, + /* Free (unallocated) memory */ + EFI_CONVENTIONAL_MEMORY, + /* Memory in which errors have been detected */ + EFI_UNUSABLE_MEMORY, + /* Memory that holds the ACPI tables */ + EFI_ACPI_RECLAIM_MEMORY, + /* Address space reserved for use by the firmware */ + EFI_ACPI_MEMORY_NVS, + /* + * Used by system firmware to request that a memory-mapped IO region + * be mapped by the OS to a virtual address so it can be accessed by + * EFI runtime services. + */ + EFI_MMAP_IO, + /* + * System memory-mapped IO region that is used to translate + * memory cycles to IO cycles by the processor. + */ + EFI_MMAP_IO_PORT, + /* + * Address space reserved by the firmware for code that is + * part of the processor. + */ + EFI_PAL_CODE, + /* + * Non-volatile memory. + */ + EFI_PERSISTENT_MEMORY_TYPE, + + EFI_MAX_MEMORY_TYPE, + EFI_TABLE_END, /* For efi_build_mem_table() */ +}; + +/* 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_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */ +#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_NV ((u64)0x0000000000008000ULL) /* non-volatile */ +#define EFI_MEMORY_MORE_RELIABLE \ + ((u64)0x0000000000010000ULL) /* higher reliability */ +#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */ +#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ +#define EFI_MEM_DESC_VERSION 1 + +#define EFI_PAGE_SHIFT 12 +#define EFI_PAGE_SIZE (1ULL << EFI_PAGE_SHIFT) +#define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1) + +struct efi_mem_desc { + u32 type; + u32 reserved; + efi_physical_addr_t physical_start; + efi_virtual_addr_t virtual_start; + u64 num_pages; + u64 attribute; +}; + +#define EFI_MEMORY_DESCRIPTOR_VERSION 1 + +/* 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 + +/* Types and defines for Time Services */ +#define EFI_TIME_ADJUST_DAYLIGHT 0x1 +#define EFI_TIME_IN_DAYLIGHT 0x2 +#define EFI_UNSPECIFIED_TIMEZONE 0x07ff + +struct efi_time { + u16 year; + u8 month; + u8 day; + u8 hour; + u8 minute; + u8 second; + u8 pad1; + u32 nanosecond; + s16 timezone; + u8 daylight; + u8 pad2; +}; + +struct efi_time_cap { + u32 resolution; + u32 accuracy; + u8 sets_to_zero; +}; + +enum efi_locate_search_type { + ALL_HANDLES, + BY_REGISTER_NOTIFY, + BY_PROTOCOL +}; + +struct efi_open_protocol_info_entry { + efi_handle_t agent_handle; + efi_handle_t controller_handle; + u32 attributes; + u32 open_count; +}; + +enum efi_entry_t { + EFIET_END, /* Signals this is the last (empty) entry */ + EFIET_MEMORY_MAP, + EFIET_GOP_MODE, + EFIET_SYS_TABLE, + + /* Number of entries */ + EFIET_MEMORY_COUNT, +}; + +#define EFI_TABLE_VERSION 1 + +/** + * struct efi_info_hdr - Header for the EFI info table + * + * @version: EFI_TABLE_VERSION + * @hdr_size: Size of this struct in bytes + * @total_size: Total size of this header plus following data + * @spare: Spare space for expansion + */ +struct efi_info_hdr { + u32 version; + u32 hdr_size; + u32 total_size; + u32 spare[5]; +}; + +/** + * struct efi_entry_hdr - Header for a table entry + * + * @type: enum eft_entry_t + * @size size of entry bytes excluding header and padding + * @addr: address of this entry (0 if it follows the header ) + * @link: size of entry including header and padding + * @spare1: Spare space for expansion + * @spare2: Spare space for expansion + */ +struct efi_entry_hdr { + u32 type; + u32 size; + u64 addr; + u32 link; + u32 spare1; + u64 spare2; +}; + +/** + * struct efi_entry_memmap - a memory map table passed to U-Boot + * + * @version: EFI's memory map table version + * @desc_size: EFI's size of each memory descriptor + * @spare: Spare space for expansion + * @desc: An array of descriptors, each @desc_size bytes apart + */ +struct efi_entry_memmap { + u32 version; + u32 desc_size; + u64 spare; + struct efi_mem_desc desc[]; +}; + +/** + * struct efi_entry_gopmode - a GOP mode table passed to U-Boot + * + * @fb_base: EFI's framebuffer base address + * @fb_size: EFI's framebuffer size + * @info_size: GOP mode info structure size + * @info: Start address of the GOP mode info structure + */ +struct efi_entry_gopmode { + efi_physical_addr_t fb_base; + /* + * Not like the ones in 'struct efi_gop_mode' which are 'unsigned + * long', @fb_size and @info_size have to be 'u64' here. As the EFI + * stub codes may have different bit size from the U-Boot payload, + * using 'long' will cause mismatch between the producer (stub) and + * the consumer (payload). + */ + u64 fb_size; + u64 info_size; + /* + * We cannot directly use 'struct efi_gop_mode_info info[]' here as + * it causes compiler to complain: array type has incomplete element + * type 'struct efi_gop_mode_info'. + */ + struct /* efi_gop_mode_info */ { + u32 version; + u32 width; + u32 height; + u32 pixel_format; + u32 pixel_bitmask[4]; + u32 pixels_per_scanline; + } info[]; +}; + +/** + * struct efi_entry_systable - system table passed to U-Boot + * + * @sys_table: EFI system table address + */ +struct efi_entry_systable { + efi_physical_addr_t sys_table; +}; + +static inline struct efi_mem_desc *efi_get_next_mem_desc( + struct efi_entry_memmap *map, struct efi_mem_desc *desc) +{ + return (struct efi_mem_desc *)((ulong)desc + map->desc_size); +} + +struct efi_priv { + efi_handle_t parent_image; + struct efi_device_path *device_path; + struct efi_system_table *sys_table; + struct efi_boot_services *boot; + struct efi_runtime_services *run; + bool use_pool_for_malloc; + unsigned long ram_base; + unsigned int image_data_type; + struct efi_info_hdr *info; + unsigned int info_size; + void *next_hdr; +}; + +/* Base address of the EFI image */ +extern char image_base[]; + +/* Start and end of U-Boot image (for payload) */ +extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[]; + +/* + * 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) + +/** + * efi_get_sys_table() - Get access to the main EFI system table + * + * @return pointer to EFI system table + */ + +struct efi_system_table *efi_get_sys_table(void); + +/** + * efi_get_ram_base() - Find the base of RAM + * + * This is used when U-Boot is built as an EFI application. + * + * @return the base of RAM as known to U-Boot + */ +unsigned long efi_get_ram_base(void); + +/** + * efi_init() - Set up ready for use of EFI boot services + * + * @priv: Pointer to our private EFI structure to fill in + * @banner: Banner to display when starting + * @image: The image handle passed to efi_main() + * @sys_table: The EFI system table pointer passed to efi_main() + */ +int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image, + struct efi_system_table *sys_table); + +/** + * efi_malloc() - Allocate some memory from EFI + * + * @priv: Pointer to private EFI structure + * @size: Number of bytes to allocate + * @retp: Return EFI status result + * @return pointer to memory allocated, or NULL on error + */ +void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp); + +/** + * efi_free() - Free memory allocated from EFI + * + * @priv: Pointer to private EFI structure + * @ptr: Pointer to memory to free + */ +void efi_free(struct efi_priv *priv, void *ptr); + +/** + * efi_puts() - Write out a string to the EFI console + * + * @priv: Pointer to private EFI structure + * @str: String to write (note this is a ASCII, not unicode) + */ +void efi_puts(struct efi_priv *priv, const char *str); + +/** + * efi_putc() - Write out a character to the EFI console + * + * @priv: Pointer to private EFI structure + * @ch: Character to write (note this is not unicode) + */ +void efi_putc(struct efi_priv *priv, const char ch); + +/** + * efi_info_get() - get an entry from an EFI table + * + * @type: Entry type to search for + * @datap: Returns pointer to entry data + * @sizep: Returns pointer to entry size + * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry + * of the requested type, -EPROTONOSUPPORT if the table has the wrong version + */ +int efi_info_get(enum efi_entry_t type, void **datap, int *sizep); + +/** + * efi_build_mem_table() - make a sorted copy of the memory table + * + * @map: Pointer to EFI memory map table + * @size: Size of table in bytes + * @skip_bs: True to skip boot-time memory and merge it with conventional + * memory. This will significantly reduce the number of table + * entries. + * @return pointer to the new table. It should be freed with free() by the + * caller + */ +void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs); + +#endif /* _LINUX_EFI_H */ |