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
|
/* devices.c: Initial scan of the prom device tree for important
* Sparc device nodes which we need to find.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#include <linux/kernel.h>
#include <linux/tasks.h>
#include <linux/config.h>
#include <asm/page.h>
#include <asm/oplib.h>
#include <asm/smp.h>
#include <asm/system.h>
struct prom_cpuinfo linux_cpus[NCPUS];
int linux_num_cpus;
extern void cpu_probe(void);
extern void clock_stop_probe(void); /* tadpole.c */
unsigned long
device_scan(unsigned long mem_start)
{
char node_str[128];
int nd, prom_node_cpu, thismid;
int cpu_nds[NCPUS]; /* One node for each cpu */
int cpu_ctr = 0;
#if CONFIG_AP1000
printk("Not scanning device list for CPUs\n");
linux_num_cpus = 1;
return;
#endif
prom_getstring(prom_root_node, "device_type", node_str, sizeof(node_str));
if(strcmp(node_str, "cpu") == 0) {
cpu_nds[0] = prom_root_node;
cpu_ctr++;
} else {
int scan;
scan = prom_getchild(prom_root_node);
prom_printf("root child is %08lx\n", (unsigned long) scan);
nd = 0;
while((scan = prom_getsibling(scan)) != 0) {
prom_getstring(scan, "device_type", node_str, sizeof(node_str));
if(strcmp(node_str, "cpu") == 0) {
cpu_nds[cpu_ctr] = scan;
linux_cpus[cpu_ctr].prom_node = scan;
prom_getproperty(scan, "mid", (char *) &thismid, sizeof(thismid));
linux_cpus[cpu_ctr].mid = thismid;
prom_printf("Found CPU %d <node=%08lx,mid=%d>\n",
cpu_ctr, (unsigned long) scan,
thismid);
cpu_ctr++;
}
};
if(cpu_ctr == 0) {
printk("No CPU nodes found, cannot continue.\n");
/* Probably a sun4d or sun4e, Sun is trying to trick us ;-) */
halt();
}
printk("Found %d CPU prom device tree node(s).\n", cpu_ctr);
};
prom_node_cpu = cpu_nds[0];
linux_num_cpus = cpu_ctr;
cpu_probe();
#if CONFIG_SUN_AUXIO
{
extern void auxio_probe(void);
auxio_probe();
}
#endif
clock_stop_probe();
return mem_start;
}
|
