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
92
93
|
/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Rob Taylor, Flying Pig Systems. robt@flyingpig.com
*
* See file CREDITS for list of people who contributed to this
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <mpc824x.h>
#include <asm/processor.h>
#include <asm/pci_io.h>
#include <commproc.h>
#include "drivers/epic.h"
int interrupt_init_cpu (unsigned *decrementer_count)
{
*decrementer_count = (get_bus_freq (0) / 4) / CONFIG_SYS_HZ;
/*
* It's all broken at the moment and I currently don't need
* interrupts. If you want to fix it, have a look at the epic
* drivers in dink32 v12. They do everthing and Motorola said
* I could use the dink source in this project as long as
* copyright notices remain intact.
*/
epicInit (EPIC_DIRECT_IRQ, 0);
/* EPIC won't generate INT unless Current Task Pri < 15 */
epicCurTaskPrioSet(0);
return (0);
}
/****************************************************************************/
/*
* Handle external interrupts
*/
void external_interrupt (struct pt_regs *regs)
{
register unsigned long temp;
pci_readl (CONFIG_SYS_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp);
sync (); /* i'm not convinced this is needed, but dink source has it */
temp &= 0xff; /*get vector */
/*TODO: handle them -... */
epicEOI ();
}
/****************************************************************************/
/*
* blank int handlers.
*/
void
irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
{
}
void irq_free_handler (int vec)
{
}
/*TODO: some handlers for winbond and 87308 interrupts
and what about generic pci inteerupts?
vga?
*/
void timer_interrupt_cpu (struct pt_regs *regs)
{
/* nothing to do here */
return;
}
|
