include/tools.h

   1 /* Constants describing the disk */
   2 #define SECTOR_SIZE     512
   3 #define SECTOR_SHIFT    9
   4 #define RATIO(b)        ((b)/SECTOR_SIZE)
   5 #define ISO_SECTOR_SIZE 2048
   6 #define ISO_PVD_OFFSET  16
   7 #define HRATIO          (SECTOR_SIZE / HCLICK_SIZE)
   8 #define PARAMSEC        1       /* sector containing boot parameters */
   9 #define DSKBASE         0x1E    /* floppy disk parameter vector */
  10 #define DSKPARSIZE      11      /* there are this many bytes of parameters */
  11 #define ESC             '\33'   /* escape key */
  12 #define HEADERSEG       0x0060  /* place for an array of struct exec's */
  13 #define MINIXSEG        0x0080  /* MINIX loaded here (rounded up to a click) */
  14 #define BOOTSEG         0x07C0  /* bootstraps are loaded here */
  15 #define SIGNATURE       0xAA55  /* proper bootstraps have this signature */
  16 #define SIGNATPOS       510     /* offset within bootblock */
  17 #define FREESEG         0x0800  /* Memory from FREESEG to cseg is free */
  18 #define MSEC_PER_TICK   55      /* 18.2 ticks per second */
  19
  20 /* Scan codes for four different keyboards (from kernel/keyboard.c) */
  21 #define DUTCH_EXT_SCAN    32    /* 'd' */
  22 #define OLIVETTI_SCAN     12    /* '=' key on olivetti */
  23 #define STANDARD_SCAN     13    /* '=' key on IBM */
  24 #define US_EXT_SCAN       22    /* 'u' */
  25
  26 /* Other */
  27 #define ROOT_INO ((ino_t) 1)    /* Inode nr of root dir. */
  28 #define IM_NAME_MAX       63
  29
  30 /* Variables */
  31 #ifndef EXTERN
  32 #define EXTERN extern
  33 #endif
  34
  35 typedef struct vector {
  36   u16_t offset;
  37   u16_t segment;
  38 } vector;
  39
  40 struct image_header {
  41   char name[IM_NAME_MAX + 1];   /* Null terminated. */
  42   struct exec process;
  43 };
  44
  45 EXTERN vector rem_part;         /* boot partition table entry */
  46 EXTERN u16_t cseg, dseg;        /* code and data segment of the boot program */
  47 EXTERN u32_t runsize;           /* size of this program */
  48 EXTERN u16_t device;            /* drive being booted from */
  49 EXTERN u16_t heads, sectors;    /* the drive's number of heads and sectors */
  50 extern u16_t eqscancode;        /* Set by peek/getch() if they see a '=' */
  51
  52 /* Sticky attributes */
  53 #define E_SPECIAL       0x01    /* These are known to the program */
  54 #define E_DEV           0x02    /* The value is a device name */
  55 #define E_RESERVED      0x04    /* May not be set by user, e.g. scancode */
  56 #define E_STICKY        0x07    /* Don't go once set */
  57
  58 /* Volatile attributes */
  59 #define E_VAR           0x08    /* Variable */
  60 #define E_FUNCTION      0x10    /* Function definition */
  61
  62 typedef struct environment {
  63   struct environment *next;
  64   char flags;
  65   char *name;                   /* name = value */
  66   char *arg;                    /* name(arg) {value} */
  67   char *value;
  68   char *defval;                 /* Safehouse for default values */
  69 } environment;
  70
  71 /* External variables */
  72 EXTERN environment *env;        /* Lists the environment */
  73 EXTERN int fsok;                /* True if the boot device contains an FS */
  74 EXTERN u32_t lowsec;            /* Offset to the file system on the boot dev */
  75
  76 /* Prototypes */
  77 _PROTOTYPE( off_t r_super, (void));
  78 _PROTOTYPE( void r_stat, (Ino_t _inum, struct stat *_stp ));
  79 _PROTOTYPE( ino_t r_readdir, (char *_name ));
  80 _PROTOTYPE( off_t r_vir2abs, (off_t _virblk ));
  81 _PROTOTYPE( ino_t r_lookup, (Ino_t _cwd, char *_path ));
  82
  83 #ifdef _MONHEAD
  84 _PROTOTYPE( void readerr, (off_t _sec, int _err ));
  85 _PROTOTYPE( int numprefix, (char *_s, char **_ps ));
  86 _PROTOTYPE( int numeric, (char *_s ));
  87 _PROTOTYPE( dev_t name2dev, (char *_name ));
  88 _PROTOTYPE( int delay, (char *_msec ));
  89 _PROTOTYPE( char *unix_err, (int _err ));
  90 _PROTOTYPE( void init_cache, (void));
  91 _PROTOTYPE( void invalidate_cache, (void));
  92 _PROTOTYPE( char *b_value, (char *_name ));
  93 _PROTOTYPE( void raw_copy, (int _doff, int _dseg, int _soff, int _sseg,
  94                                                 int _count));
  95 _PROTOTYPE( void raw_clear, (int _off, int _seg, int _count));
  96 _PROTOTYPE( void bootstrap, (int _device, int _partoff, int _partseg));
  97
  98 _PROTOTYPE( long a2l, (char *_a ));
  99 _PROTOTYPE( char *ul2a, (u32_t _n ));
 100 _PROTOTYPE( char *u2a, (int _n1 ));
 101
 102 /* Functions defined in monhead.s and usable by other files. */
 103 _PROTOTYPE( void reset_video, (int color));
 104 _PROTOTYPE( int dev_geometry, (void));
 105 _PROTOTYPE( u16_t get_ext_memsize, (void));
 106 _PROTOTYPE( u16_t get_low_memsize, (void));
 107 _PROTOTYPE( u16_t get_processor, (void));
 108 _PROTOTYPE( u32_t get_tick, (void));
 109 _PROTOTYPE( u16_t get_video, (void));
 110 _PROTOTYPE( u16_t get_word, (int _off, int _seg));
 111 _PROTOTYPE( int getchar, (void));
 112 _PROTOTYPE( void minix, (void));
 113 _PROTOTYPE( void minix86, (int _kcs, int _kds, char *_bpar, int _psize));
 114 _PROTOTYPE( void minix386, (int _kcs, int _kds, char *_bpar, int _psize));
 115 _PROTOTYPE( int peekchar, (void));
 116 _PROTOTYPE( void put_word, (int _off, int _seg, int _word));
 117 _PROTOTYPE( int putchar, (char _c));
 118 _PROTOTYPE( int readsectors, (int _off, int _seg, off_t _adr, int _ct));
 119 _PROTOTYPE( void reboot, (void));
 120 _PROTOTYPE( void relocate, (void));
 121 _PROTOTYPE( int writesectors, (int _off, int _seg, off_t _adr, int _ct));
 122 #endif
 123