1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/*
* blkio/setgeometry.c
*
* Copyright (C) 1998 Russell King
*
* The block I/O interface allows an OS-independent method to access devices
*
* Close a device on RiscOS architecture
*/
#include <assert.h>
#include <stdlib.h>
#include "util/debug.h"
#include "blkio.h"
#include "filecore.h"
/* Function: u_int blkio_setgeometry (blkio_t *blkio, geometry_t *geo)
* Purpose : Return the geometry for the device opened with blkio_open
* Params : blkio - structure returned by blkio_open
* : geo - pointer to geometry structure
*/
u_int blkio_setgeometry (blkio_t *blkio, const geometry_t *geo)
{
u_int ret = 0;
#if defined(RISCOS)
u_int log2secsize, sectors;
#endif
assert (blkio != NULL);
assert (geo != NULL);
dbg_printf ("blkio_setgeometry([sector_size=%d, sectors=%d, heads=%d, cylinders=%d])",
geo->sector_size, geo->sectors, geo->heads, geo->cylinders);
dbg_level_up ();
blkio->geometry = *geo;
#if defined(RISCOS)
log2secsize = blkio->disc_record->d.log2secsize;
if (geo->sector_size == 1 << log2secsize) {
sectors = geo->cylinders * geo->heads * geo->sectors;
blkio->disc_record->d.secspertrack = geo->sectors;
blkio->disc_record->d.heads = geo->heads - (blkio->disc_record->d.lowsector & 0x40 ? 1 : 0);
blkio->disc_record->d.disc_size_high = sectors >> (32 - log2secsize);
blkio->disc_record->d.disc_size = sectors << log2secsize;
dbg_printf ("-disc_record: ds=0x%08X%08X", blkio->disc_record->d.disc_size_high,
blkio->disc_record->d.disc_size);
ret = !0;
}
#endif
#ifdef UNIX
ret = !0;
#endif
dbg_level_down ();
dbg_printf ("ret=%d", ret);
return ret;
}
|
