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