blob: 755fbe220d7471251cd4b0a43c9346dae602ab33 (
plain)
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
|
/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <cpu/x86/lapic.h>
#include <console/console.h>
void do_lapic_init(void)
{
/* this is so interrupts work. This is very limited scope --
* linux will do better later, we hope ...
*/
/* this is the first way we learned to do it. It fails on real SMP
* stuff. So we have to do things differently ...
* see the Intel mp1.4 spec, page A-3
*/
printk(BIOS_INFO, "Setting up local APIC...\n");
/* Enable the local APIC */
enable_lapic();
/*
* Set Task Priority to 'accept all'.
*/
lapic_write_around(LAPIC_TASKPRI,
lapic_read_around(LAPIC_TASKPRI) & ~LAPIC_TPRI_MASK);
/* Put the local APIC in virtual wire mode */
lapic_write_around(LAPIC_SPIV,
(lapic_read_around(LAPIC_SPIV) & ~(LAPIC_VECTOR_MASK))
| LAPIC_SPIV_ENABLE);
lapic_write_around(LAPIC_LVT0,
(lapic_read_around(LAPIC_LVT0) &
~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER |
LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY |
LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 |
LAPIC_DELIVERY_MODE_MASK))
| (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING |
LAPIC_DELIVERY_MODE_EXTINT)
);
lapic_write_around(LAPIC_LVT1,
(lapic_read_around(LAPIC_LVT1) &
~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER |
LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY |
LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 |
LAPIC_DELIVERY_MODE_MASK))
| (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING |
LAPIC_DELIVERY_MODE_NMI)
);
printk(BIOS_DEBUG, " apic_id: 0x%02lx ", lapicid());
printk(BIOS_INFO, "done.\n");
}
|
