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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
#include "quik.h"
#include "prom.h"
char bootdevice[512];
static char current_devname[512];
static ihandle current_dev;
int open(char *device)
{
current_dev = call_prom("open", 1, 1, device);
if (current_dev == (ihandle) 0 || current_dev == (ihandle) -1) {
qprintf("\nCouldn't open %s\n", device);
return -1;
}
strcpy(current_devname, device);
return 0;
}
char * strstr(const char * s1,const char * s2)
{
int l1, l2;
l2 = qstrlen(s2);
if (!l2)
return (char *) s1;
l1 = qstrlen(s1);
while (l1 >= l2) {
l1--;
if (!memcmp(s1,s2,l2))
return (char *) s1;
s1++;
}
return NULL;
}
int diskinit()
{
char *p;
extern unsigned int is_chrp;
prom_get_chosen("bootpath", bootdevice, sizeof(bootdevice));
if (bootdevice[0] == 0) {
prom_get_options("boot-device", bootdevice, sizeof(bootdevice));
if (bootdevice[0] == 0)
fatal("Couldn't determine boot device");
}
p = strchr(bootdevice, ':');
if (p != 0)
*p = 0;
/*
* Hack for the time being. We need at the raw disk device, not
* just a few partitions. -- Cort
*/
if ( is_chrp )
qsprintf(bootdevice, "disk:0");
if( open(bootdevice) )
{
/*
* Some chrp machines do not have a 'disk' alias so
* try this if disk:0 fails
* -- Cort
*/
qsprintf(bootdevice, "/pci@fee00000/scsi@c/sd@8:0");
return open(bootdevice);
}
return 0;
}
int read(char *buf, int nbytes, long long offset)
{
int nr;
if (nbytes == 0)
return 0;
nr = (int)call_prom("seek", 3, 1, current_dev, (unsigned int) (offset >> 32),
(unsigned int) (offset & 0xFFFFFFFF));
nr = (int) call_prom("read", 3, 1, current_dev, buf, nbytes);
return nr;
}
void close()
{
}
int setdisk(char *device)
{
if (strcmp(device, current_devname) == 0)
return 0;
close();
return open(device);
}
|
