source: SVN/rincon/u-boot/cpu/74xx_7xx/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: 2.8 KB
Line 
1/*
2 * (C) Copyright 2001
3 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24/*
25 * interrupts.c - just enough support for the decrementer/timer
26 */
27
28#include <common.h>
29#include <mpc8xx.h>
30#include <mpc8xx_irq.h>
31#include <asm/processor.h>
32#include <commproc.h>
33#include <command.h>
34
35int interrupt_init_cpu (unsigned *decrementer_count)
36{
37#if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE)
38        printf("interrupt_init: GT main cause reg: %08x:%08x\n",
39               GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER),
40               GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER));
41        printf("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
42               GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER),
43               GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER),
44               GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER));
45        printf("interrupt_init: ethernet mask regs:  %08x %08x %08x\n",
46               GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER),
47               GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER),
48               GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
49        puts("interrupt_init: setting decrementer_count\n");
50#endif
51        *decrementer_count = get_tbclk() / CFG_HZ;
52
53        return (0);
54}
55
56/****************************************************************************/
57
58/*
59 * Handle external interrupts
60 */
61void
62external_interrupt(struct pt_regs *regs)
63{
64        puts("external_interrupt (oops!)\n");
65}
66
67volatile ulong timestamp = 0;
68
69/*
70 * timer_interrupt - gets called when the decrementer overflows,
71 * with interrupts disabled.
72 * Trivial implementation - no need to be really accurate.
73 */
74void
75timer_interrupt_cpu (struct pt_regs *regs)
76{
77        /* nothing to do here */
78        return;
79}
80
81/****************************************************************************/
82
83/*
84 * Install and free a interrupt handler.
85 */
86
87void
88irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
89{
90
91}
92
93void
94irq_free_handler(int vec)
95{
96
97}
98
99/****************************************************************************/
100
101void
102do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
103{
104        puts("IRQ related functions are unimplemented currently.\n");
105}
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