/* Copyright (C) 2001-2001 Fujitsu Siemens Computers   Joachim Braeuer   This file is part of smbios   smbios is free software; you can redistribute it and/or modify it   under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2 of the License,   or (at your option) any later version.   smbios is distributed in the hope that it will be useful, but WITHOUT   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   for more details.   You should have received a copy of the GNU General Public License   along with smbios; see the file COPYING. If not, write to the   Free Software Foundation, Inc., 59 Temple Place - Suite 330,   Boston, MA 02111-1307, USA.*//* $Log: bios.h,v $/* Revision 1.1  2001/09/15 14:52:43  bretthauert/* initial release/* *//** \file bios.h *  declarations and prototypes of DMI-BIOS and SM-BIOS stuff * *  \author Markus Lyra *  \author Thomas Bretthauer *  \author Joachim Braeuer *  \version 0.11 *  \date January 2001 */     #ifndef __BIOS_H__#define __BIOS_H__/* *   Macros to help debugging *//** to help debugging ... */#undef PDEBUG /* undef it, just in case */#ifdef _DEBUG_#  define PDEBUG(fmt, args...) printk( KERN_DEBUG "smbios: " fmt, ## args)#else#  define PDEBUG(fmt, args...) /* not debugging: nothing */#endif/* *   Magic numbers *//** start address of BIOS segment to scanned for SM-BIOS and DMI-BIOS */#define BIOS_START_ADDRESS      0xF0000/** length of the scanned BIOS area for SM-BIOS and DMI-BIOS */#define BIOS_MAP_LENGTH         0x10000/** magic 4 bytes to identify SM-BIOS entry point, paragraph boundary */#define SMBIOS_MAGIC_DWORD      0x5F4D535F /* anchor string "_SM_" *//** magic 4 bytes to identify DMI-BIOS entry point, byte boundary */#define DMIBIOS_MAGIC_DWORD     0x494d445f /* anchor string "_DMI" *//** identifier for SM-BIOS structures within SM-BIOS entry point */#define DMI_STRING              "_DMI_"/** list of types which are known to have subtyes; expandable! */#define TYPES_WITH_SUBTYPES     185, 187, 208, 209, 210, 211, 212, 254/** maximum block size for proc read function */#define PROC_BLOCK_SIZE         (3*1024)/** mode raw/cooked */#define FILE_MODE_RAW       0#define FILE_MODE_COOKED    1/* *   Structures *//** SM-BIOS entry point structure  * the SMBIOS Entry Point structure described below can be located by * application software by searching for the anchor string on paragraph * (16 byte) boundaries within the physical memory address range 000F0000h to * 000FFFFFh. This entry point encapsulates an intermediate anchor string * that is used by some existing DMI browsers. * * @note While the SMBIOS Major and Minor Versions (offsets 06h and 07h) * currently duplicate the information present in the SMBIOS BCD Revision * (offset 1Dh), they provide a path for future growth in this specification. * The BCD Revision, for example, provides only a single digit for each of * the major and minor version numbers. */typedef struct smbios_entry_point_struct{	/** "_SM_", specified as four ASCII characters (5F 53 4D 5F) */  __u32 anchor_string                  __attribute__ ((packed));	/** checksum of the Entry Point Structure (EPS). This value, when added to 	 * all other bytes in the EPS, will result in the value 00h (using 8 bit	 * addition calculations). Values in the EPS are summed starting at offset	 * 00h, for Entry Point Length bytes.*/  __u8  entry_point_checksum           __attribute__ ((packed));	/** Length of the Entry Point Structure, starting with the Anchor String 	 * field, in bytes, currently 1Fh. */  __u8  entry_point_length             __attribute__ ((packed));	/** identifies the major version of this specification implemented in	 * the table structures, e.g. the value will be 0Ah for revision 10.22	 * and 02h for revision 2.1 */  __u8  major_version                  __attribute__ ((packed));	/** identifies the minor version of this specification implemented in	 * the table structures, e.g. the value will be 16h for revision 10.22	 * and 01h for revision 2.1 */  __u8  minor_version                  __attribute__ ((packed));	/** size of the largest SMBIOS structure, in bytes, and encompasses the	 * structure's formatted area and text strings. This is the value returned	 * as StructureSize from the Plug-n-Play 'Get SMBIOS Information' function */	__u16 max_struct_size                __attribute__ ((packed));	/** identifies the EPS revision implemented in this structure and identifies	 * the formatting of offsets 0Bh to 0Fh, one of:	 * 00h     Entry Point based on SMBIOS 2.1 definition; formatted area is	 *         reserved and set to all 00h.	 * 01h-FFh reserved for assignment via this specification */  __u8  revision                       __attribute__ ((packed));	/** the value present in the Entry Point Revision field defines the	 * interpretation to be placed upon these5 bytes. */  __u8  formated_area[5]               __attribute__ ((packed));	/** "_DMI_", specified as five ASCII characters (5F 44 4D 49 5F) */  __u8  intermediate_string[5]         __attribute__ ((packed));	/** checksum of the Intermediate Entry Point Structure (IEPS). This value,	 * when added to all other bytes in the IEPS, will result in the value 00h	 * (using 8 bit addition calculations). Values in the IEPS are summed	 * starting at offset 10h, for 0Fh bytes */  __u8  intermediate_checksum          __attribute__ ((packed));	/** the 32 bit physical starting address of the read-only SMBIOS Structure	 * Table, that can start at any 32 bit address. This area contains all of the	 * SMBIOS structures fully packed together. These structures can then be	 * parsed to produce exactly the same format as that returned from a 'Get	 * SMBIOS Structure' function call. */  __u16 struct_table_length            __attribute__ ((packed));  __u32 struct_table_address           __attribute__ ((packed));  __u16 no_of_structures               __attribute__ ((packed));  __u8  bcd_revision                   __attribute__ ((packed));} smbios_entry_point_struct;/** SM-BIOS and DMI-BIOS structure header */typedef struct smbios_struct{  __u8  type                           __attribute__ ((packed));  __u8  length                         __attribute__ ((packed));  __u16 handle                         __attribute__ ((packed));  __u8  subtype                        __attribute__ ((packed));        /* ... other fields are structure dependend ... */} smbios_struct;/** DMI-BIOS structure header */typedef struct dmibios_table_entry_struct{  __u16 size                           __attribute__ ((packed));  __u16 handle                         __attribute__ ((packed));  __u32 procedure                      __attribute__ ((packed));} dmibios_table_entry_struct;/** DMI-BIOS entry point structure */typedef struct dmibios_entry_point_struct{  __u8  signature[10]                  __attribute__ ((packed));  __u8  revision                       __attribute__ ((packed));  dmibios_table_entry_struct entry[1]  __attribute__ ((packed));} dmibios_entry_point_struct;/* *   Variables */extern struct proc_dir_entry * smbios_proc_dir;             /* /proc/smbios */extern struct proc_dir_entry * smbios_raw_proc_dir;         /* /proc/smbios/raw */extern struct proc_dir_entry * smbios_cooked_proc_dir;      /* /proc/smbios/cooked */extern void * smbios_base;                                  /* F-Segment */extern smbios_entry_point_struct * smbios_entry_point;      /* start of SMBIOS within the F-Segment */extern dmibios_entry_point_struct * dmibios_entry_point;    /* start of DMIBIOS within the F-Segment */extern void * smbios_structures_base;                       /* base of SMBIOS raw structures */extern unsigned char smbios_types_with_subtypes[];extern char smbios_version_string[32];                      /* e.g. V2.31 *//* *   Functions *//* for the description see the implementation file */smbios_entry_point_struct * smbios_find_entry_point(void * base);dmibios_entry_point_struct * dmibios_find_entry_point(void * base);unsigned char smbios_check_entry_point(void * addr);int smbios_type_has_subtype(unsigned char type);int smbios_get_struct_length(smbios_struct * struct_ptr);int dmibios_get_struct_length(smbios_struct * struct_ptr);int smbios_version_proc (char *page, char **start, off_t off, int count, int *eof, void *data);int bios_read_raw_proc(char * page, char ** start, off_t off, int count, int * eof, void * data);int bios_read_cooked_proc(char *page, char **start, off_t off, int count, int *eof, void *data);int dmibios_read_raw_proc(char * page, char ** start, off_t off, int count, int * eof, void * data);int dmibios_read_cooked_proc(char *page, char **start, off_t off, int count, int *eof, void *data);int smbios_make_dir_entries(struct proc_dir_entry *smbiosdir, struct proc_dir_entry *rawdir, struct proc_dir_entry *cookeddir);int smbios_make_version_entry(struct proc_dir_entry *smbiosdir);int dmibios_make_dir_entries(struct proc_dir_entry * smbiosdir, struct proc_dir_entry * rawdir, struct proc_dir_entry * cookeddir);void smbios_destroy_dir_entries(struct proc_dir_entry * dir);unsigned int smbios_get_readable_name_ext(char *readable_name, smbios_struct *struct_ptr);unsigned int smbios_get_readable_name(char *readable_name, smbios_struct *struct_ptr);int make_file_entries (char *filename, struct proc_dir_entry *dir, smbios_struct *struct_ptr, int mode);#endif /* __BIOS_H__ */