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linux-next/include/linux/efi.h
Matt Fleming 8a415b8c05 efi, pstore: Read data from variable store before memcpy() 
Seiji reported getting empty dmesg-* files, because the data was never
actually read in efi_pstore_read_func(), and so the memcpy() was copying
garbage data.

This patch necessitated adding __efivar_entry_get() which is callable
between efivar_entry_iter_{begin,end}(). We can also delete
__efivar_entry_size() because efi_pstore_read_func() was the only
caller.

Reported-by: Seiji Aguchi <seiji.aguchi@hds.com>
Tested-by: Seiji Aguchi <seiji.aguchi@hds.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2013-04-30 16:03:10 +01:00

846 lines
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#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 <drummond@valinux.com>
* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
* David Mosberger-Tang <davidm@hpl.hp.com>
* Stephane Eranian <eranian@hpl.hp.com>
*/
#include <linux/init.h>
#include <linux/string.h>
#include <linux/time.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/rtc.h>
#include <linux/ioport.h>
#include <linux/pfn.h>
#include <linux/pstore.h>
#include <asm/page.h>
#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);
typedef efi_status_t efi_query_variable_store_t(u32 attributes, unsigned long size);
/*
* 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);
extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size);
#else
static inline void efi_late_init(void) {}
static inline void efi_free_boot_services(void) {}
static inline efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
{
return EFI_SUCCESS;
}
#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<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr);
*addr &= PAGE_MASK;
}
/*
* 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_store_t *query_variable_store;
};
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_get(struct efivar_entry *entry, u32 *attributes,
unsigned long *size, void *data);
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);
extern struct work_struct efivar_work;
void efivar_run_worker(void);
#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE)
int efivars_sysfs_init(void);
#endif /* CONFIG_EFI_VARS */
#endif /* _LINUX_EFI_H */
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