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
|
/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cpu.h>
#include <sys/types.h>
#include <sys/panic.h>
#include <sys/machdep.h>
#include <vm/dynalloc.h>
#include <assert.h>
__MODULE_NAME("kern_cpu");
__KERNEL_META("$Hyra$: kern_cpu.c, Ian Marco Moffett, "
"Machine independent CPU interface");
#define CI_LIST_SZ \
sizeof(struct cpu_info *) * (MAXCPUS + 1)
static size_t ncpu = 0;
static struct cpu_info **ci_list = NULL;
void
cpu_attach(struct cpu_info *ci)
{
if ((ci->idx = ncpu++) >= (MAXCPUS + 1)) {
panic("Machine core count exceeds MAXCPUS!\n");
}
if (ci_list == NULL) {
ci_list = dynalloc(CI_LIST_SZ);
__assert(ci_list != NULL);
}
ci_list[cpu_index(ci)] = ci;
}
struct cpu_info *
cpu_get(size_t i)
{
if (i >= ncpu || ci_list == NULL) {
return NULL;
}
return ci_list[i];
}
size_t
cpu_count(void)
{
return ncpu;
}
|
