124 lines
4.5 KiB
C
124 lines
4.5 KiB
C
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/* Constants describing the disk */
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#define SECTOR_SIZE 512
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#define SECTOR_SHIFT 9
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#define RATIO(b) ((b)/SECTOR_SIZE)
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#define ISO_SECTOR_SIZE 2048
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#define ISO_PVD_OFFSET 16
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#define HRATIO (SECTOR_SIZE / HCLICK_SIZE)
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#define PARAMSEC 1 /* sector containing boot parameters */
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#define DSKBASE 0x1E /* floppy disk parameter vector */
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#define DSKPARSIZE 11 /* there are this many bytes of parameters */
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#define ESC '\33' /* escape key */
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#define HEADERSEG 0x0060 /* place for an array of struct exec's */
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#define MINIXSEG 0x0080 /* MINIX loaded here (rounded up to a click) */
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#define BOOTSEG 0x07C0 /* bootstraps are loaded here */
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#define SIGNATURE 0xAA55 /* proper bootstraps have this signature */
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#define SIGNATPOS 510 /* offset within bootblock */
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#define FREESEG 0x0800 /* Memory from FREESEG to cseg is free */
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#define MSEC_PER_TICK 55 /* 18.2 ticks per second */
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/* Scan codes for four different keyboards (from kernel/keyboard.c) */
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#define DUTCH_EXT_SCAN 32 /* 'd' */
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#define OLIVETTI_SCAN 12 /* '=' key on olivetti */
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#define STANDARD_SCAN 13 /* '=' key on IBM */
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#define US_EXT_SCAN 22 /* 'u' */
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/* Other */
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#define ROOT_INO ((ino_t) 1) /* Inode nr of root dir. */
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#define IM_NAME_MAX 63
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/* Variables */
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#ifndef EXTERN
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#define EXTERN extern
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#endif
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typedef struct vector {
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u16_t offset;
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u16_t segment;
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} vector;
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struct image_header {
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char name[IM_NAME_MAX + 1]; /* Null terminated. */
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struct exec process;
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};
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EXTERN vector rem_part; /* boot partition table entry */
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EXTERN u16_t cseg, dseg; /* code and data segment of the boot program */
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EXTERN u32_t runsize; /* size of this program */
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EXTERN u16_t device; /* drive being booted from */
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EXTERN u16_t heads, sectors; /* the drive's number of heads and sectors */
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extern u16_t eqscancode; /* Set by peek/getch() if they see a '=' */
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/* Sticky attributes */
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#define E_SPECIAL 0x01 /* These are known to the program */
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#define E_DEV 0x02 /* The value is a device name */
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#define E_RESERVED 0x04 /* May not be set by user, e.g. scancode */
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#define E_STICKY 0x07 /* Don't go once set */
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/* Volatile attributes */
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#define E_VAR 0x08 /* Variable */
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#define E_FUNCTION 0x10 /* Function definition */
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typedef struct environment {
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struct environment *next;
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char flags;
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char *name; /* name = value */
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char *arg; /* name(arg) {value} */
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char *value;
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char *defval; /* Safehouse for default values */
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} environment;
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/* External variables */
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EXTERN environment *env; /* Lists the environment */
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EXTERN int fsok; /* True if the boot device contains an FS */
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EXTERN u32_t lowsec; /* Offset to the file system on the boot dev */
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/* Prototypes */
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_PROTOTYPE( off_t r_super, (void));
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_PROTOTYPE( void r_stat, (Ino_t _inum, struct stat *_stp ));
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_PROTOTYPE( ino_t r_readdir, (char *_name ));
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_PROTOTYPE( off_t r_vir2abs, (off_t _virblk ));
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_PROTOTYPE( ino_t r_lookup, (Ino_t _cwd, char *_path ));
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#ifdef _MONHEAD
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_PROTOTYPE( void readerr, (off_t _sec, int _err ));
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_PROTOTYPE( int numprefix, (char *_s, char **_ps ));
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_PROTOTYPE( int numeric, (char *_s ));
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_PROTOTYPE( dev_t name2dev, (char *_name ));
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_PROTOTYPE( int delay, (char *_msec ));
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_PROTOTYPE( char *unix_err, (int _err ));
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_PROTOTYPE( void init_cache, (void));
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_PROTOTYPE( void invalidate_cache, (void));
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_PROTOTYPE( char *b_value, (char *_name ));
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_PROTOTYPE( void raw_copy, (int _doff, int _dseg, int _soff, int _sseg,
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int _count));
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_PROTOTYPE( void raw_clear, (int _off, int _seg, int _count));
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_PROTOTYPE( void bootstrap, (int _device, int _partoff, int _partseg));
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_PROTOTYPE( long a2l, (char *_a ));
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_PROTOTYPE( char *ul2a, (u32_t _n ));
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_PROTOTYPE( char *u2a, (int _n1 ));
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/* Functions defined in monhead.s and usable by other files. */
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_PROTOTYPE( void reset_video, (int color));
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_PROTOTYPE( int dev_geometry, (void));
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_PROTOTYPE( u16_t get_ext_memsize, (void));
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_PROTOTYPE( u16_t get_low_memsize, (void));
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_PROTOTYPE( u16_t get_processor, (void));
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_PROTOTYPE( u32_t get_tick, (void));
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_PROTOTYPE( u16_t get_video, (void));
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_PROTOTYPE( u16_t get_word, (int _off, int _seg));
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_PROTOTYPE( int getchar, (void));
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_PROTOTYPE( void minix, (void));
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_PROTOTYPE( void minix86, (int _kcs, int _kds, char *_bpar, int _psize));
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_PROTOTYPE( void minix386, (int _kcs, int _kds, char *_bpar, int _psize));
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_PROTOTYPE( int peekchar, (void));
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_PROTOTYPE( void put_word, (int _off, int _seg, int _word));
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_PROTOTYPE( int putchar, (char _c));
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_PROTOTYPE( int readsectors, (int _off, int _seg, off_t _adr, int _ct));
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_PROTOTYPE( void reboot, (void));
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_PROTOTYPE( void relocate, (void));
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_PROTOTYPE( int writesectors, (int _off, int _seg, off_t _adr, int _ct));
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#endif
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