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/* common.h - Common data structures and functions. */
/* Copyright 1992-1998 Werner Almesberger. See file COPYING for details. */
#ifndef COMMON_H
#define COMMON_H
#include <sys/stat.h>
#include <linux/types.h>
#include <linux/genhd.h>
#include "lilo.h"
#define O_NOACCESS 3 /* open a file for "no access" */
typedef struct {
unsigned char sector,track; /* CX */
unsigned char device,head; /* DX */
unsigned char num_sect; /* AL */
} SECTOR_ADDR;
typedef struct {
char name[MAX_IMAGE_NAME+1];
char password[MAX_PW+1];
unsigned short rd_size[2]; /* RAM disk size in bytes, 0 if none */
SECTOR_ADDR initrd,start;
unsigned short start_page; /* page at which the kernel is loaded high, 0
if loading low */
unsigned short flags,vga_mode;
} IMAGE_DESCR;
typedef struct {
char jump[6]; /* jump over the data */
char signature[4]; /* "LILO" */
unsigned short stage,version;
unsigned short timeout; /* 54 msec delay until input time-out,
0xffff: never */
unsigned short delay; /* delay: wait that many 54 msec units. */
unsigned char port; /* COM port. 0 = none, 1 = COM1, etc. */
unsigned char ser_param; /* RS-232 parameters, must be 0 if unused */
unsigned long timestamp; /* timestamp for restoration */
SECTOR_ADDR descr[3]; /* 2 descriptors and default command line */
unsigned char prompt; /* 0 = only on demand, =! 0 = always */
unsigned short msg_len; /* 0 if none */
SECTOR_ADDR msg; /* initial greeting message */
SECTOR_ADDR keytab; /* keyboard translation table */
SECTOR_ADDR secondary[MAX_SECONDARY+1];
} BOOT_PARAMS_1; /* first stage boot loader */
typedef struct {
char jump[6]; /* jump over the data */
char signature[4]; /* "LILO" */
unsigned short stage,version;
} BOOT_PARAMS_2; /* second stage boot loader */
typedef struct {
char jump[6]; /* jump over the data */
char signature[4]; /* "LILO" */
unsigned short stage,version; /* stage is 0x10 */
unsigned short offset; /* partition entry offset */
unsigned char drive; /* BIOS drive code */
unsigned char head; /* head; always 0 */
unsigned short drvmap; /* offset of drive map */
unsigned char ptable[PARTITION_ENTRY*PARTITION_ENTRIES]; /* part. table */
} BOOT_PARAMS_C; /* chain loader */
typedef union {
BOOT_PARAMS_1 par_1;
BOOT_PARAMS_2 par_2;
BOOT_PARAMS_C par_c;
unsigned char sector[SECTOR_SIZE];
} BOOT_SECTOR;
typedef union {
struct {
unsigned short checksum;
IMAGE_DESCR descr[MAX_IMAGES]; /* boot file descriptors */
} d;
unsigned char sector[SECTOR_SIZE*2];
} DESCR_SECTORS;
typedef struct {
unsigned short jump; /* 0: jump to startup code */
char signature[4]; /* 2: "HdrS" */
unsigned short version; /* 6: header version */
unsigned short x,y,z; /* 8: LOADLIN hacks */
unsigned short ver_offset; /* 14: kernel version string */
unsigned char loader; /* 16: loader type */
unsigned char flags; /* 17: loader flags */
unsigned short a; /* 18: more LOADLIN hacks */
unsigned long start; /* 20: kernel start, filled in by loader */
unsigned long ramdisk; /* 24: RAM disk start address */
unsigned long ramdisk_size; /* 28: RAM disk size */
unsigned short b,c; /* 32: bzImage hacks */
unsigned short heap_end_ptr;/* 36: end of free area after setup code */
} SETUP_HDR;
#define alloc_t(t) ((t *) alloc(sizeof(t)))
extern int verbose,test,compact,linear,nowarn;
extern int boot_dev_nr;
extern unsigned short drv_map[DRVMAP_SIZE+1]; /* needed for fixup maps */
extern int curr_drv_map;
extern unsigned long prt_map[PRTMAP_SIZE+1];
extern int curr_prt_map;
volatile void pdie(char *msg);
/* Do a perror and then exit. */
volatile void die(char *fmt,...);
/* fprintf an error message and then exit. */
void *alloc(int size);
/* Allocates the specified number of bytes. Dies on error. */
void *ralloc(void *old,int size);
/* Changes the size of an allocated memory area. Dies on error. */
char *stralloc(const char *str);
/* Like strdup, but dies on error. */
int to_number(char *num);
/* Converts a string to a number. Dies if the number is invalid. */
void check_version(BOOT_SECTOR *sect,int stage);
/* Verify that a boot sector has the correct version number. */
int stat_equal(struct stat *a,struct stat *b);
/* Compares two stat structures. Returns a non-zero integer if they describe
the same file, zero if they don't. */
#endif
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