Project

General

Profile

Statistics
| Branch: | Revision:

scoutos / prex-0.9.0 / bsp / hal / x86 / arch / cpufunc.S @ 03e9c04a

History | View | Annotate | Download (2.59 KB)

1 03e9c04a Brad Neuman
/*-
2
 * Copyright (c) 2008, Kohsuke Ohtani
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 * 1. Redistributions of source code must retain the above copyright
9
 *    notice, this list of conditions and the following disclaimer.
10
 * 2. Redistributions in binary form must reproduce the above copyright
11
 *    notice, this list of conditions and the following disclaimer in the
12
 *    documentation and/or other materials provided with the distribution.
13
 * 3. Neither the name of the author nor the names of any co-contributors
14
 *    may be used to endorse or promote products derived from this software
15
 *    without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27
 * SUCH DAMAGE.
28
 */
29
30
/*
31
 * cpufunc.S - Functions to provide access to i386 specific instructions.
32
 */
33
34
#include <machine/asm.h>
35
#include <cpu.h>
36
37
	.section ".text"
38
39
ENTRY(cpu_idle)
40
	sti
41
	hlt
42
	ret
43
44
ENTRY(flush_tlb)
45
	movl	%cr3, %eax
46
	movl	%eax, %cr3
47
	ret
48
49
ENTRY(flush_cache)
50
	wbinvd
51
	ret
52
53
ENTRY(load_tr)
54
	movl	4(%esp), %eax
55
	ltr	%ax
56
	ret
57
58
ENTRY(load_gdt)
59
	movl	4(%esp), %eax
60
	lgdt	(%eax)
61
	jmp	1f			/* Flush the prefetch queue */
62
	nop
63
1:
64
	movl	$(KERNEL_DS), %eax
65
	movl	%eax, %ds
66
	movl	%eax, %es
67
	movl	%eax, %fs
68
	movl	%eax, %gs
69
	movl	%eax, %ss
70
	movl	$(KERNEL_CS), %eax
71
	pushl	%eax
72
	pushl	$2f
73
	lret
74
2:
75
	ret
76
77
ENTRY(load_idt)
78
	movl	4(%esp), %eax
79
	lidt	(%eax)
80
	ret
81
82
ENTRY(get_cr2)
83
	movl	%cr2, %eax
84
	ret
85
86
ENTRY(set_cr3)
87
	movl	4(%esp), %eax
88
	movl	%eax, %cr3
89
	ret
90
91
ENTRY(get_cr3)
92
	movl	%cr3, %eax
93
	ret
94
95
ENTRY(outb)
96
	movl	4(%esp), %edx
97
	movl	8(%esp), %eax
98
	outb	%al, %dx
99
	ret
100
101
ENTRY(inb)
102
	movl	4(%esp), %edx
103
	xorl	%eax, %eax
104
	inb	%dx, %al
105
	ret
106
107
ENTRY(outb_p)
108
	movl	4(%esp), %edx
109
	movl	8(%esp), %eax
110
	outb	%al, %dx
111
	outb	%al, $0x80
112
	ret
113
114
ENTRY(inb_p)
115
	movl	4(%esp), %edx
116
	xorl	%eax, %eax
117
	inb	%dx, %al
118
	outb	%al, $0x80
119
	ret