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Diffstat (limited to 'include/linux/efi.h')
| -rw-r--r-- | include/linux/efi.h | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h new file mode 100644 index 000000000000..047e7222df7a --- /dev/null +++ b/include/linux/efi.h @@ -0,0 +1,398 @@ +#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 <asm/page.h> +#include <asm/system.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_FOUND (14 | (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 + +/* + * For current x86 implementations of EFI, there is + * additional padding in the mem descriptors. This is not + * the case in ia64. Need to have this fixed in the f/w. + */ +typedef struct { + u32 type; + u32 pad; + u64 phys_addr; + u64 virt_addr; + u64 num_pages; + u64 attribute; +#if defined (__i386__) + u64 pad1; +#endif +} efi_memory_desc_t; + +typedef int (*efi_freemem_callback_t) (unsigned long start, unsigned long 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; + +/* + * 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; +} 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, + unsigned long 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); + +/* + * 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 ) + +typedef struct { + efi_guid_t guid; + unsigned long table; +} efi_config_table_t; + +#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL) +#define EFI_SYSTEM_TABLE_REVISION ((1 << 16) | 00) + +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; + unsigned long boottime; + unsigned long nr_tables; + unsigned long tables; +} efi_system_table_t; + +struct efi_memory_map { + efi_memory_desc_t *phys_map; + efi_memory_desc_t *map; + int nr_map; + unsigned long desc_version; +}; + +/* + * All runtime access to EFI goes through this structure: + */ +extern struct efi { + efi_system_table_t *systab; /* EFI system table */ + void *mps; /* MPS table */ + void *acpi; /* ACPI table (IA64 ext 0.71) */ + void *acpi20; /* ACPI table (ACPI 2.0) */ + void *smbios; /* SM BIOS table */ + void *sal_systab; /* SAL system table */ + void *boot_info; /* boot info table */ + void *hcdp; /* HCDP table */ + void *uga; /* UGA 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_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, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", + guid->b[3], guid->b[2], guid->b[1], guid->b[0], + guid->b[5], guid->b[4], guid->b[7], guid->b[6], + guid->b[8], guid->b[9], guid->b[10], guid->b[11], + guid->b[12], guid->b[13], guid->b[14], guid->b[15]); + return out; +} + +extern void efi_init (void); +extern void *efi_get_pal_addr (void); +extern void efi_map_pal_code (void); +extern void efi_map_memmap(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 */ +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 int __init efi_uart_console_only (void); +extern void efi_initialize_iomem_resources(struct resource *code_resource, + struct resource *data_resource); +extern unsigned long __init efi_get_time(void); +extern int __init efi_set_rtc_mmss(unsigned long nowtime); +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) +{ + int 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. + */ +#ifdef CONFIG_EFI +# ifdef CONFIG_X86 + extern int efi_enabled; +# else +# define efi_enabled 1 +# endif +#else +# define efi_enabled 0 +#endif + +/* + * Variable Attributes + */ +#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001 +#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002 +#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004 + +/* + * 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)); + +#endif /* _LINUX_EFI_H */ |