include/linux/efi.h

   1 #ifndef _LINUX_EFI_H
   2 #define _LINUX_EFI_H
   3
   4 /*
   5  * Extensible Firmware Interface
   6  * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999
   7  *
   8  * Copyright (C) 1999 VA Linux Systems
   9  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  10  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  11  *      David Mosberger-Tang <davidm@hpl.hp.com>
  12  *      Stephane Eranian <eranian@hpl.hp.com>
  13  */
  14 #include <linux/init.h>
  15 #include <linux/string.h>
  16 #include <linux/time.h>
  17 #include <linux/types.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/rtc.h>
  20 #include <linux/ioport.h>
  21
  22 #include <asm/page.h>
  23 #include <asm/system.h>
  24
  25 #define EFI_SUCCESS             0
  26 #define EFI_LOAD_ERROR          ( 1 | (1UL << (BITS_PER_LONG-1)))
  27 #define EFI_INVALID_PARAMETER   ( 2 | (1UL << (BITS_PER_LONG-1)))
  28 #define EFI_UNSUPPORTED         ( 3 | (1UL << (BITS_PER_LONG-1)))
  29 #define EFI_BAD_BUFFER_SIZE     ( 4 | (1UL << (BITS_PER_LONG-1)))
  30 #define EFI_BUFFER_TOO_SMALL    ( 5 | (1UL << (BITS_PER_LONG-1)))
  31 #define EFI_NOT_FOUND           (14 | (1UL << (BITS_PER_LONG-1)))
  32
  33 typedef unsigned long efi_status_t;
  34 typedef u8 efi_bool_t;
  35 typedef u16 efi_char16_t;               /* UNICODE character */
  36
  37
  38 typedef struct {
  39         u8 b[16];
  40 } efi_guid_t;
  41
  42 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
  43 ((efi_guid_t) \
  44 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  45   (b) & 0xff, ((b) >> 8) & 0xff, \
  46   (c) & 0xff, ((c) >> 8) & 0xff, \
  47   (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  48
  49 /*
  50  * Generic EFI table header
  51  */
  52 typedef struct {
  53         u64 signature;
  54         u32 revision;
  55         u32 headersize;
  56         u32 crc32;
  57         u32 reserved;
  58 } efi_table_hdr_t;
  59
  60 /*
  61  * Memory map descriptor:
  62  */
  63
  64 /* Memory types: */
  65 #define EFI_RESERVED_TYPE                0
  66 #define EFI_LOADER_CODE                  1
  67 #define EFI_LOADER_DATA                  2
  68 #define EFI_BOOT_SERVICES_CODE           3
  69 #define EFI_BOOT_SERVICES_DATA           4
  70 #define EFI_RUNTIME_SERVICES_CODE        5
  71 #define EFI_RUNTIME_SERVICES_DATA        6
  72 #define EFI_CONVENTIONAL_MEMORY          7
  73 #define EFI_UNUSABLE_MEMORY              8
  74 #define EFI_ACPI_RECLAIM_MEMORY          9
  75 #define EFI_ACPI_MEMORY_NVS             10
  76 #define EFI_MEMORY_MAPPED_IO            11
  77 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
  78 #define EFI_PAL_CODE                    13
  79 #define EFI_MAX_MEMORY_TYPE             14
  80
  81 /* Attribute values: */
  82 #define EFI_MEMORY_UC           ((u64)0x0000000000000001ULL)    /* uncached */
  83 #define EFI_MEMORY_WC           ((u64)0x0000000000000002ULL)    /* write-coalescing */
  84 #define EFI_MEMORY_WT           ((u64)0x0000000000000004ULL)    /* write-through */
  85 #define EFI_MEMORY_WB           ((u64)0x0000000000000008ULL)    /* write-back */
  86 #define EFI_MEMORY_WP           ((u64)0x0000000000001000ULL)    /* write-protect */
  87 #define EFI_MEMORY_RP           ((u64)0x0000000000002000ULL)    /* read-protect */
  88 #define EFI_MEMORY_XP           ((u64)0x0000000000004000ULL)    /* execute-protect */
  89 #define EFI_MEMORY_RUNTIME      ((u64)0x8000000000000000ULL)    /* range requires runtime mapping */
  90 #define EFI_MEMORY_DESCRIPTOR_VERSION   1
  91
  92 #define EFI_PAGE_SHIFT          12
  93
  94 /*
  95  * For current x86 implementations of EFI, there is
  96  * additional padding in the mem descriptors.  This is not
  97  * the case in ia64.  Need to have this fixed in the f/w.
  98  */
  99 typedef struct {
 100         u32 type;
 101         u32 pad;
 102         u64 phys_addr;
 103         u64 virt_addr;
 104         u64 num_pages;
 105         u64 attribute;
 106 #if defined (__i386__)
 107         u64 pad1;
 108 #endif
 109 } efi_memory_desc_t;
 110
 111 typedef int (*efi_freemem_callback_t) (unsigned long start, unsigned long end, void *arg);
 112
 113 /*
 114  * Types and defines for Time Services
 115  */
 116 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 117 #define EFI_TIME_IN_DAYLIGHT     0x2
 118 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
 119
 120 typedef struct {
 121         u16 year;
 122         u8 month;
 123         u8 day;
 124         u8 hour;
 125         u8 minute;
 126         u8 second;
 127         u8 pad1;
 128         u32 nanosecond;
 129         s16 timezone;
 130         u8 daylight;
 131         u8 pad2;
 132 } efi_time_t;
 133
 134 typedef struct {
 135         u32 resolution;
 136         u32 accuracy;
 137         u8 sets_to_zero;
 138 } efi_time_cap_t;
 139
 140 /*
 141  * Types and defines for EFI ResetSystem
 142  */
 143 #define EFI_RESET_COLD 0
 144 #define EFI_RESET_WARM 1
 145 #define EFI_RESET_SHUTDOWN 2
 146
 147 /*
 148  * EFI Runtime Services table
 149  */
 150 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 151 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000
 152
 153 typedef struct {
 154         efi_table_hdr_t hdr;
 155         unsigned long get_time;
 156         unsigned long set_time;
 157         unsigned long get_wakeup_time;
 158         unsigned long set_wakeup_time;
 159         unsigned long set_virtual_address_map;
 160         unsigned long convert_pointer;
 161         unsigned long get_variable;
 162         unsigned long get_next_variable;
 163         unsigned long set_variable;
 164         unsigned long get_next_high_mono_count;
 165         unsigned long reset_system;
 166 } efi_runtime_services_t;
 167
 168 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 169 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 170 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 171                                             efi_time_t *tm);
 172 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 173 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 174                                          unsigned long *data_size, void *data);
 175 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 176                                               efi_guid_t *vendor);
 177 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 178                                          unsigned long attr, unsigned long data_size,
 179                                          void *data);
 180 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 181 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 182                                  unsigned long data_size, efi_char16_t *data);
 183 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 184                                                 unsigned long descriptor_size,
 185                                                 u32 descriptor_version,
 186                                                 efi_memory_desc_t *virtual_map);
 187
 188 /*
 189  *  EFI Configuration Table and GUID definitions
 190  */
 191 #define NULL_GUID \
 192     EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )
 193
 194 #define MPS_TABLE_GUID    \
 195     EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 196
 197 #define ACPI_TABLE_GUID    \
 198     EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 199
 200 #define ACPI_20_TABLE_GUID    \
 201     EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )
 202
 203 #define SMBIOS_TABLE_GUID    \
 204     EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 205
 206 #define SAL_SYSTEM_TABLE_GUID    \
 207     EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )
 208
 209 #define HCDP_TABLE_GUID \
 210     EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
 211
 212 #define UGA_IO_PROTOCOL_GUID \
 213     EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
 214
 215 #define EFI_GLOBAL_VARIABLE_GUID \
 216     EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )
 217
 218 typedef struct {
 219         efi_guid_t guid;
 220         unsigned long table;
 221 } efi_config_table_t;
 222
 223 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 224 #define EFI_SYSTEM_TABLE_REVISION  ((1 << 16) | 00)
 225
 226 typedef struct {
 227         efi_table_hdr_t hdr;
 228         unsigned long fw_vendor;        /* physical addr of CHAR16 vendor string */
 229         u32 fw_revision;
 230         unsigned long con_in_handle;
 231         unsigned long con_in;
 232         unsigned long con_out_handle;
 233         unsigned long con_out;
 234         unsigned long stderr_handle;
 235         unsigned long stderr;
 236         efi_runtime_services_t *runtime;
 237         unsigned long boottime;
 238         unsigned long nr_tables;
 239         unsigned long tables;
 240 } efi_system_table_t;
 241
 242 struct efi_memory_map {
 243         efi_memory_desc_t *phys_map;
 244         efi_memory_desc_t *map;
 245         int nr_map;
 246         unsigned long desc_version;
 247 };
 248
 249 /*
 250  * All runtime access to EFI goes through this structure:
 251  */
 252 extern struct efi {
 253         efi_system_table_t *systab;     /* EFI system table */
 254         void *mps;                      /* MPS table */
 255         void *acpi;                     /* ACPI table  (IA64 ext 0.71) */
 256         void *acpi20;                   /* ACPI table  (ACPI 2.0) */
 257         void *smbios;                   /* SM BIOS table */
 258         void *sal_systab;               /* SAL system table */
 259         void *boot_info;                /* boot info table */
 260         void *hcdp;                     /* HCDP table */
 261         void *uga;                      /* UGA table */
 262         efi_get_time_t *get_time;
 263         efi_set_time_t *set_time;
 264         efi_get_wakeup_time_t *get_wakeup_time;
 265         efi_set_wakeup_time_t *set_wakeup_time;
 266         efi_get_variable_t *get_variable;
 267         efi_get_next_variable_t *get_next_variable;
 268         efi_set_variable_t *set_variable;
 269         efi_get_next_high_mono_count_t *get_next_high_mono_count;
 270         efi_reset_system_t *reset_system;
 271         efi_set_virtual_address_map_t *set_virtual_address_map;
 272 } efi;
 273
 274 static inline int
 275 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 276 {
 277         return memcmp(&left, &right, sizeof (efi_guid_t));
 278 }
 279
 280 static inline char *
 281 efi_guid_unparse(efi_guid_t *guid, char *out)
 282 {
 283         sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 284                 guid->b[3], guid->b[2], guid->b[1], guid->b[0],
 285                 guid->b[5], guid->b[4], guid->b[7], guid->b[6],
 286                 guid->b[8], guid->b[9], guid->b[10], guid->b[11],
 287                 guid->b[12], guid->b[13], guid->b[14], guid->b[15]);
 288         return out;
 289 }
 290
 291 extern void efi_init (void);
 292 extern void *efi_get_pal_addr (void);
 293 extern void efi_map_pal_code (void);
 294 extern void efi_map_memmap(void);
 295 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 296 extern void efi_gettimeofday (struct timespec *ts);
 297 extern void efi_enter_virtual_mode (void);      /* switch EFI to virtual mode, if possible */
 298 extern u64 efi_get_iobase (void);
 299 extern u32 efi_mem_type (unsigned long phys_addr);
 300 extern u64 efi_mem_attributes (unsigned long phys_addr);
 301 extern int __init efi_uart_console_only (void);
 302 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 303                                         struct resource *data_resource);
 304 extern unsigned long __init efi_get_time(void);
 305 extern int __init efi_set_rtc_mmss(unsigned long nowtime);
 306 extern struct efi_memory_map memmap;
 307
 308 /**
 309  * efi_range_is_wc - check the WC bit on an address range
 310  * @start: starting kvirt address
 311  * @len: length of range
 312  *
 313  * Consult the EFI memory map and make sure it's ok to set this range WC.
 314  * Returns true or false.
 315  */
 316 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 317 {
 318         unsigned long i;
 319
 320         for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 321                 unsigned long paddr = __pa(start + i);
 322                 if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 323                         return 0;
 324         }
 325         /* The range checked out */
 326         return 1;
 327 }
 328
 329 #ifdef CONFIG_EFI_PCDP
 330 extern int __init efi_setup_pcdp_console(char *);
 331 #endif
 332
 333 /*
 334  * We play games with efi_enabled so that the compiler will, if possible, remove
 335  * EFI-related code altogether.
 336  */
 337 #ifdef CONFIG_EFI
 338 # ifdef CONFIG_X86
 339    extern int efi_enabled;
 340 # else
 341 #  define efi_enabled 1
 342 # endif
 343 #else
 344 # define efi_enabled 0
 345 #endif
 346
 347 /*
 348  * Variable Attributes
 349  */
 350 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 351 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 352 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
 353
 354 /*
 355  * EFI Device Path information
 356  */
 357 #define EFI_DEV_HW                      0x01
 358 #define  EFI_DEV_PCI                             1
 359 #define  EFI_DEV_PCCARD                          2
 360 #define  EFI_DEV_MEM_MAPPED                      3
 361 #define  EFI_DEV_VENDOR                          4
 362 #define  EFI_DEV_CONTROLLER                      5
 363 #define EFI_DEV_ACPI                    0x02
 364 #define   EFI_DEV_BASIC_ACPI                     1
 365 #define   EFI_DEV_EXPANDED_ACPI                  2
 366 #define EFI_DEV_MSG                     0x03
 367 #define   EFI_DEV_MSG_ATAPI                      1
 368 #define   EFI_DEV_MSG_SCSI                       2
 369 #define   EFI_DEV_MSG_FC                         3
 370 #define   EFI_DEV_MSG_1394                       4
 371 #define   EFI_DEV_MSG_USB                        5
 372 #define   EFI_DEV_MSG_USB_CLASS                 15
 373 #define   EFI_DEV_MSG_I20                        6
 374 #define   EFI_DEV_MSG_MAC                       11
 375 #define   EFI_DEV_MSG_IPV4                      12
 376 #define   EFI_DEV_MSG_IPV6                      13
 377 #define   EFI_DEV_MSG_INFINIBAND                 9
 378 #define   EFI_DEV_MSG_UART                      14
 379 #define   EFI_DEV_MSG_VENDOR                    10
 380 #define EFI_DEV_MEDIA                   0x04
 381 #define   EFI_DEV_MEDIA_HARD_DRIVE               1
 382 #define   EFI_DEV_MEDIA_CDROM                    2
 383 #define   EFI_DEV_MEDIA_VENDOR                   3
 384 #define   EFI_DEV_MEDIA_FILE                     4
 385 #define   EFI_DEV_MEDIA_PROTOCOL                 5
 386 #define EFI_DEV_BIOS_BOOT               0x05
 387 #define EFI_DEV_END_PATH                0x7F
 388 #define EFI_DEV_END_PATH2               0xFF
 389 #define   EFI_DEV_END_INSTANCE                  0x01
 390 #define   EFI_DEV_END_ENTIRE                    0xFF
 391
 392 struct efi_generic_dev_path {
 393         u8 type;
 394         u8 sub_type;
 395         u16 length;
 396 } __attribute ((packed));
 397
 398 #endif /* _LINUX_EFI_H */