source: SVN/rincon/u-boot/cpu/mpc824x/interrupts.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 2.4 KB
Line 
1/*
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com
5 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 * MA 02111-1307 USA
23 */
24
25#include <common.h>
26#include <mpc824x.h>
27#include <asm/processor.h>
28#include <asm/pci_io.h>
29#include <commproc.h>
30#include "drivers/epic.h"
31
32int interrupt_init_cpu (unsigned *decrementer_count)
33{
34        *decrementer_count = (get_bus_freq (0) / 4) / CFG_HZ;
35
36        /*
37         * It's all broken at the moment and I currently don't need
38         * interrupts. If you want to fix it, have a look at the epic
39         * drivers in dink32 v12. They do everthing and Motorola said
40         * I could use the dink source in this project as long as
41         * copyright notices remain intact.
42         */
43
44        epicInit (EPIC_DIRECT_IRQ, 0);
45        /* EPIC won't generate INT unless Current Task Pri < 15 */
46        epicCurTaskPrioSet(0);
47
48        return (0);
49}
50
51/****************************************************************************/
52
53/*
54 * Handle external interrupts
55 */
56void external_interrupt (struct pt_regs *regs)
57{
58        register unsigned long temp;
59
60        pci_readl (CFG_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp);
61        sync ();                                        /* i'm not convinced this is needed, but dink source has it */
62        temp &= 0xff;                           /*get vector */
63
64        /*TODO: handle them -... */
65        epicEOI ();
66}
67
68/****************************************************************************/
69
70/*
71 * blank int handlers.
72 */
73
74void
75irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
76{
77}
78
79void irq_free_handler (int vec)
80{
81
82}
83
84/*TODO: some handlers for winbond and 87308 interrupts
85 and what about generic pci inteerupts?
86 vga?
87 */
88
89void timer_interrupt_cpu (struct pt_regs *regs)
90{
91        /* nothing to do here */
92        return;
93}
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