1#ifndef _ADFS_FS_H
 2#define _ADFS_FS_H
 3
 4#include <uapi/linux/adfs_fs.h>
 
 5
 6/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 7 * Calculate the boot block checksum on an ADFS drive.  Note that this will
 8 * appear to be correct if the sector contains all zeros, so also check that
 9 * the disk size is non-zero!!!
10 */
11static inline int adfs_checkbblk(unsigned char *ptr)
12{
13	unsigned int result = 0;
14	unsigned char *p = ptr + 511;
15
16	do {
17	        result = (result & 0xff) + (result >> 8);
18        	result = result + *--p;
19	} while (p != ptr);
20
21	return (result & 0xff) != ptr[511];
22}
 
 
23#endif

 1#ifndef _ADFS_FS_H
 2#define _ADFS_FS_H
 3
 4#include <linux/types.h>
 5#include <linux/magic.h>
 6
 7/*
 8 * Disc Record at disc address 0xc00
 9 */
10struct adfs_discrecord {
11    __u8  log2secsize;
12    __u8  secspertrack;
13    __u8  heads;
14    __u8  density;
15    __u8  idlen;
16    __u8  log2bpmb;
17    __u8  skew;
18    __u8  bootoption;
19    __u8  lowsector;
20    __u8  nzones;
21    __le16 zone_spare;
22    __le32 root;
23    __le32 disc_size;
24    __le16 disc_id;
25    __u8  disc_name[10];
26    __le32 disc_type;
27    __le32 disc_size_high;
28    __u8  log2sharesize:4;
29    __u8  unused40:4;
30    __u8  big_flag:1;
31    __u8  unused41:1;
32    __u8  nzones_high;
33    __le32 format_version;
34    __le32 root_size;
35    __u8  unused52[60 - 52];
36};
37
38#define ADFS_DISCRECORD		(0xc00)
39#define ADFS_DR_OFFSET		(0x1c0)
40#define ADFS_DR_SIZE		 60
41#define ADFS_DR_SIZE_BITS	(ADFS_DR_SIZE << 3)
42
43#ifdef __KERNEL__
44/*
45 * Calculate the boot block checksum on an ADFS drive.  Note that this will
46 * appear to be correct if the sector contains all zeros, so also check that
47 * the disk size is non-zero!!!
48 */
49static inline int adfs_checkbblk(unsigned char *ptr)
50{
51	unsigned int result = 0;
52	unsigned char *p = ptr + 511;
53
54	do {
55	        result = (result & 0xff) + (result >> 8);
56        	result = result + *--p;
57	} while (p != ptr);
58
59	return (result & 0xff) != ptr[511];
60}
61#endif
62
63#endif