1 /* common.h - Common data structures and functions
3 * Copyright 1992-1998 Werner Almesberger
4 * Copyright 1999-2005 John Coffman
5 * Copyright 2009-2011 Joachim Wiedorn
8 * Licensed under the terms contained in the file 'COPYING'
9 * in the source directory.
17 #include <asm/types.h>
23 # define PAGE_SIZE 4096U
27 # define O_NOACCESS O_ACCMODE
29 /* open a file for "no access" */
33 /* special for LILO, bypass the actual open in dev_open( , ,-1) */
44 ;*/typedef struct { /*
46 ;*/ unsigned char sector,track; /* CX
49 ;*/ unsigned char device,head; /* DX
52 ;*/ unsigned char num_sect; /* AL
61 ;*/typedef struct { /*
63 ;*/ char name[MAX_IMAGE_NAME+1]; /* image name, NUL terminated
64 id_name: .blkb MAX_IMAGE_NAME_asm+1
65 ;*/ unsigned short password_crc[MAX_PW_CRC*(sizeof(INT4)/sizeof(short))]; /* 4 password CRC-32 values
66 id_password_crc:.blkb MAX_PW_CRC_asm*4
67 ;*/ unsigned short rd_size[2]; /* RAM disk size in sectors, 0 if none
68 id_rd_size: .blkb 4 ;don't change the order !!!
69 ;*/ SECTOR_ADDR initrd,start; /* start of initrd & kernel
70 id_initrd: .blkb sa_size ; **
71 id_start: .blkb sa_size ; **
72 ;*/ unsigned short flags,vga_mode; /* image flags & video mode
73 id_flags: .blkb 2 ; **
74 id_vga_mode: .blkb 2 ; **
81 ;*/typedef struct { /*
83 ;*/ unsigned char bytes_per_sector[2]; /*
84 bpb_bytes_per_sector: .blkb 2
85 ;*/ unsigned char sectors_per_cluster; /*
86 bpb_sectors_per_cluster:.blkb 1
87 ;*/ unsigned char reserved_sectors[2]; /*
89 ;*/ unsigned char number_of_FATs; /*
91 ;*/ unsigned char root_dir_entries[2]; /*
93 ;*/ unsigned char total_sectors[2]; /*
95 ;*/ unsigned char media_descriptor; /*
97 ;*/ unsigned char sectors_per_FAT[2]; /*
99 ;*/ unsigned char sectors_per_track[2]; /* DOS v.3
101 ;*/ unsigned char heads_per_cylinder[2]; /* DOS v.3
103 ;*/ unsigned char hidden_sectors[4]; /*
105 ;*/ unsigned char total_sectors_long[4]; /* if total_sectors==0
107 ;*/ unsigned char reserved[7]; /* pad to 32 bytes
109 ;*/} BIOS_PARAMETER_BLOCK; /*
115 ;*/typedef struct { /*
117 ;*/ unsigned char jump[3]; /* jump to boot code
119 ;*/ char system[8]; /* system ID
120 bpdos_system: .blkb 8
121 ;*/ BIOS_PARAMETER_BLOCK bpb; /* BIOS parameter block
122 bpdos_bpb: .blkb bpb_size
123 ;*/} BOOT_PARAMS_DOS; /* DOS fat header
129 ;*/typedef struct { /*
131 ;*/ unsigned char cli; /* clear interrupt flag instruction
133 ;*/ unsigned char jmp0, jmp1; /* short jump
135 ;*/ unsigned char stage; /*
137 ;*/ unsigned short code_length; /* length of the first stage code
138 par1_code_len: .blkb 2
139 ;*/ char signature[4]; /* "LILO"
140 par1_signature: .blkb 4
141 ;*/ unsigned short version; /*
142 par1_version: .blkb 2
143 ;*/ unsigned int map_stamp; /* timestamp for this installation (map creation)
144 par1_mapstamp: .blkb 4
145 ;*/ unsigned int raid_offset; /* raid partition/partition offset
146 par1_raid_offset: .blkb 4
147 ;*/ unsigned int timestamp; /* timestamp for restoration
148 par1_timestamp: .blkb 4
149 ;*/ unsigned int map_serial_no; /* volume serial no. / id containing the map file
150 par1_map_serial_no: .blkb 4
151 ;*/ unsigned short prompt; /* FLAG_PROMPT=always, FLAG_RAID install
153 ;*/ SECTOR_ADDR secondary; /* sectors of the second stage loader
154 par1_secondary: .blkb sa_size+1
155 ;*/} BOOT_PARAMS_1; /* first stage boot loader
162 ;*/typedef struct { /* second stage parameters
164 ;*/ char jump[6]; /* jump over the data
166 ;*/ char signature[4]; /* "LILO"
167 par2_signature: .blkb 4
168 ;*/ unsigned short version; /*
169 par2_version: .blkb 2
170 ;*/ unsigned int map_stamp; /* time of creation of the map file
171 par2_mapstamp: .blkb 4
172 ;*/ unsigned short stage; /*
174 ;*/ unsigned char port; /* COM port. 0 = none, 1 = COM1, etc. !!! keep these two serial bytes together !!!
175 ;*/ unsigned char ser_param; /* RS-232 parameters, must be 0 if unused
176 par2_port: .blkb 1 ; referenced together
177 par2_ser_param: .blkb 1 ; **
178 ;*/ unsigned short timeout; /* 54 msec delay until input time-out, 0xffff: never
179 par2_timeout: .blkb 2
180 ;*/ unsigned short delay; /* delay: wait that many 54 msec units.
182 ;*/ unsigned short msg_len; /* 0 if none
183 par2_msg_len: .blkb 2
184 ;*/ SECTOR_ADDR keytab; /* keyboard translation table
185 par2_keytab: .blkb sa_size
186 ;*/ unsigned char flag2; /* flags specific to the second stage loader
188 ;*/} BOOT_PARAMS_2; /* second stage boot loader
196 ;*/typedef struct { /*
198 ;*/ char jump[6]; /* jump over the data
200 ;*/ char signature[4]; /* "LILO"
201 parC_signature: .blkb 4
202 ;*/ unsigned short stage,version; /* stage is 0x10
204 parC_version: .blkb 2
205 ;*/ unsigned short offset; /* partition entry offset
207 ;*/ unsigned char drive; /* BIOS drive code
209 ;*/ unsigned char head; /* head; always 0
211 ;*/ unsigned short drvmap; /* offset of drive map
213 ;*/ unsigned char ptable[PARTITION_ENTRY*PARTITION_ENTRIES]; /* part. table
214 parC_ptable: .blkb 64
215 ;*/ unsigned short p_devmap[2]; /* pointer to device map filled in by second.S
217 ;*/} BOOT_PARAMS_C; /* chain loader
223 ;*/typedef struct { /*
225 ;*/ char menu_sig[4]; /* "MENU" or "BMP4" signature, or NULs if not present
227 ;*/ unsigned char at_text; /* attribute for normal menu text
229 ;*/ unsigned char at_highlight; /* attribute for highlighted text
230 mt_at_hilite: .blkb 1
231 ;*/ unsigned char at_border; /* attribute for borders
232 mt_at_border: .blkb 1
233 ;*/ unsigned char at_title; /* attribute for title
235 ;*/ unsigned char len_title; /* length of the title string
236 mt_len_title: .blkb 1
237 ;*/ char title[MAX_MENU_TITLE+2]; /* MENU title to override default
238 mt_title: .blkb MAX_MENU_TITLE_asm+2
239 ;*/ short row, col, ncol; /* BMP row, col, and ncols
243 ;*/ short maxcol, xpitch; /* BMP max per col, xpitch between cols
246 ;*/ short fg, bg, sh; /* BMP normal text fore, backgr, shadow
250 ;*/ short h_fg, h_bg, h_sh; /* highlight fg, bg, & shadow
254 ;*/ short t_fg, t_bg, t_sh; /* timer fg, bg, & shadow colors
258 ;*/ short t_row, t_col; /* timer position
261 ;*/ short mincol, reserved[3]; /* BMP min per col before spill to next, reserved spacer
265 ;*/ unsigned int serial_no[MAX_BIOS_DEVICES]; /* Known device serial nos. 0x80 .. 0x8F
266 mt_serial_no: .blkw MAX_BIOS_DEVICES_asm*2
267 ;*/ unsigned int raid_offset[MAX_RAID_DEVICES]; /* RAID offsets for flagged devices
268 mt_raid_offset: .blkw MAX_RAID_DEVICES_asm*2
269 ;*/ unsigned short raid_dev_mask; /* 16 bit raid device mask flagging items in serial_no
270 mt_raid_dev_mask: .blkw 1
271 ;*/ SECTOR_ADDR msg; /* initial greeting message
272 mt_msg: .blkb sa_size
273 ;*/ SECTOR_ADDR dflcmd; /* default command line
274 mt_dflcmd: .blkb sa_size
275 ;*/ SECTOR_ADDR mt_descr[MAX_DESCR_SECS]; /* descriptor disk addresses
276 mt_descr: .blkb sa_size*MAX_DESCR_SECS_asm
277 ;*/ char unused[150-MAX_BIOS_DEVICES*sizeof(int)-(MAX_RAID_DEVICES)*sizeof(int)-MAX_DESCR_SECS*sizeof(SECTOR_ADDR)]; /* spacer
278 mt_unused: .blkb 150-sa_size*MAX_DESCR_SECS_asm-4*MAX_BIOS_DEVICES_asm-4*MAX_RAID_DEVICES_asm
279 ;*/ short checksum[2]; /* checksum longword
281 ;*/ unsigned char mt_flag; /* contains the FLAG_NOBD only
283 ;*/ char unused2; /* spacer beyond checksum
285 ;*/} MENUTABLE; /* MENU and BITMAP parameters at KEYTABLE+256
294 unsigned char bootcode[MAX_BOOT_SIZE];
295 unsigned short mbz; /* must be zero */
297 unsigned short marker; /* may be zero */
298 unsigned char part[PART_TABLE_SIZE];
299 unsigned short boot_ind; /* 0xAA55 */
306 BOOT_PARAMS_DOS par_d;
308 unsigned char sector[SECTOR_SIZE];
313 IMAGE_DESCR descr[MAX_IMAGES]; /* boot file descriptors */
315 unsigned char sector[SECTOR_SIZE*MAX_DESCR_SECS];
317 unsigned int sector[SECTOR_SIZE/4*MAX_DESCR_SECS - 1];
318 unsigned int checksum;
324 unsigned char data[1];
331 unsigned char device, flags;
340 IMAGES_numerator = SECTOR_SIZE_asm*MAX_DESCR_SECS_asm - 4 - 1
341 IMAGES = IMAGES_numerator / id_size
345 unsigned short jump; /* 0: jump to startup code */
346 char signature[4]; /* 2: "HdrS" */
347 unsigned short version; /* 6: header version */
348 unsigned short x,y,z; /* 8: LOADLIN hacks */
349 unsigned short ver_offset; /* 14: kernel version string */
350 unsigned char loader; /* 16: loader type */
351 unsigned char flags; /* 17: loader flags */
352 unsigned short a; /* 18: more LOADLIN hacks */
353 unsigned int start; /* 20: kernel start, filled in by loader */
354 unsigned int ramdisk; /* 24: RAM disk start address */
355 unsigned int ramdisk_size; /* 28: RAM disk size */
356 unsigned short b,c; /* 32: bzImage hacks */
357 unsigned short heap_end_ptr;/* 36: 2.01 end of free area after setup code */
358 unsigned char d; /* 38: padding */
359 unsigned int cmd_line_ptr; /* 40: 2.02 address32 of command line */
360 unsigned int ramdisk_max; /* 44: 2.03 address32 of highest mem. for ramdisk */
363 #define alloc_t(t) ((t *) alloc(sizeof(t)))
365 typedef enum {X_NULL=0, X_NONE, X_AUTO, X_MBR_ONLY, X_MBR, X_SPEC} LILO_EXTRA;
366 typedef enum {AD_ANY=0, AD_GEOMETRIC, AD_LINEAR, AD_LBA32=4} ADDR_MODE;
367 typedef enum {DL_NOT_SET=0, DL_BAD=1, DL_UNKNOWN, DL_MAYBE, DL_GOOD} DL_BIOS;
369 extern LILO_EXTRA extra;
370 extern char *identify;
371 extern int verbose,test,compact,linear,nowarn,lba32,autoauto,passw,geometric;
372 extern int bios_boot, bios_map;
373 extern int ireloc, force_fs, force_raid, extended_pt, query;
374 extern int colormax, warnings;
375 extern DL_BIOS bios_passes_dl;
376 extern int boot_dev_nr,raid_index,raid_flags,do_md_install,ndisk,zflag,eflag;
377 extern unsigned short drv_map[DRVMAP_SIZE+1]; /* needed for fixup maps */
378 extern int curr_drv_map;
379 extern unsigned int prt_map[PRTMAP_SIZE+1];
380 extern int curr_prt_map, config_read;
381 extern unsigned int serial_no[MAX_BIOS_DEVICES];
382 extern char *config_file;
385 extern char *identify; /* in identify.c */
386 extern int dm_major_list[16];
387 extern int dm_major_nr;
389 #define crc(a,b) (~crc32((a),(b),CRC_POLY1))
391 { register unsigned short u1,u2; register unsigned int u=(x); u1=u; u2=u>>16; \
392 u1=(u1>>8)|(u1<<8); u2=(u2>>8)|(u2<<8); x=(unsigned int)u1<<16|u2; }
393 #define cc(x) crc(x.data,x.size)
394 #define comma (cc(First)|cc(Second)|cc(Third)|cc(Bitmap)|cc(Chain)|cc(Mbr)|cc(Mbr2))
397 /*volatile*/ void pdie(const char *msg) __attribute__ ((noreturn));
398 /* Do a perror and then exit. */
401 /*volatile*/ void __attribute__ ((format (printf, 1, 2)))
402 __attribute__ ((noreturn)) die(const char *fmt,...);
403 /* fprintf an error message and then exit. */
406 /*volatile*/ void warn(char *fmt,...);
407 /* issue a warning message if !nowarn */
410 void *alloc(int size);
411 /* Allocates the specified number of bytes. Dies on error. */
414 void *ralloc(void *old,int size);
415 /* Changes the size of an allocated memory area. Dies on error. */
418 char *stralloc(const char *str);
419 /* Like strdup, but dies on error. */
422 int to_number(char *num);
423 /* Converts a string to a number. Dies if the number is invalid. */
426 int timer_number(char *num);
427 /* Converts a string to a number. Allows suffix of 't', 's', 'm', 'h'
428 for Tenths, Seconds, Minutes, Hours. Dies if number is invalid for
429 "timeout" or "delay" */
432 void check_version(BOOT_SECTOR *sect, int stage);
433 /* Verify that a boot sector has the correct version number. */
436 int stat_equal(struct stat *a, struct stat *b);
437 /* Compares two stat structures. Returns a non-zero integer if they describe
438 the same file, zero if they don't. */
442 unsigned int crc32partial(unsigned char *cp, int nsize,
443 unsigned int polynomial, unsigned int *accum);
444 /* accumulate a partial CRC-32 */
448 unsigned int crc32 (unsigned char *cp, int nsize, unsigned int polynomial);
449 /* calculate a CRC-32 polynomial */
452 void show_link(char *name);
453 /* show what a link resolves to */