1/*	$NetBSD: mvsoc_intr.c,v 1.2 2010/12/20 00:25:28 matt Exp $	*/
2/*
3 * Copyright (c) 2010 KIYOHARA Takashi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: mvsoc_intr.c,v 1.2 2010/12/20 00:25:28 matt Exp $");
30
31#define _INTR_PRIVATE
32
33#include <sys/param.h>
34#include <sys/proc.h>
35
36#include <machine/intr.h>
37
38#include <arm/cpu.h>
39#include <arm/pic/picvar.h>
40#include <arm/marvell/mvsocreg.h>
41#include <arm/marvell/mvsocvar.h>
42
43
44static void mvsoc_bridge_pic_unblock_irqs(struct pic_softc *, size_t, uint32_t);
45static void mvsoc_bridge_pic_block_irqs(struct pic_softc *, size_t, uint32_t);
46static int mvsoc_bridge_pic_find_pending_irqs(struct pic_softc *);
47static void mvsoc_bridge_pic_establish_irq(struct pic_softc *,
48					   struct intrsource *);
49static void mvsoc_bridge_pic_source_name(struct pic_softc *, int, char *,
50					 size_t);
51
52static const char * const sources[] = {
53    "CPUSelfInt",      "CPUTimer0IntReq", "CPUTimer1IntReq", "CPUWDTimerIntReq",
54    "AccessErr",       "Bit64Err",
55};
56
57static struct pic_ops mvsoc_bridge_picops = {
58	.pic_unblock_irqs = mvsoc_bridge_pic_unblock_irqs,
59	.pic_block_irqs = mvsoc_bridge_pic_block_irqs,
60	.pic_find_pending_irqs = mvsoc_bridge_pic_find_pending_irqs,
61	.pic_establish_irq = mvsoc_bridge_pic_establish_irq,
62	.pic_source_name = mvsoc_bridge_pic_source_name,
63};
64
65struct pic_softc mvsoc_bridge_pic = {
66	.pic_ops = &mvsoc_bridge_picops,
67	.pic_maxsources = MVSOC_MLMB_MLMBI_NIRQ,
68	.pic_name = "mvsoc_bridge",
69};
70
71
72void
73mvsoc_irq_handler(void *frame)
74{
75	struct cpu_info * const ci = curcpu();
76	const int oldipl = ci->ci_cpl;
77	const uint32_t oldipl_mask = __BIT(oldipl);
78	int ipl_mask = 0;
79
80	ci->ci_data.cpu_nintr++;
81
82	ipl_mask = find_pending_irqs();
83
84	/*
85	 * Record the pending_ipls and deliver them if we can.
86	 */
87	if ((ipl_mask & ~oldipl_mask) > oldipl_mask)
88		pic_do_pending_ints(I32_bit, oldipl, frame);
89}
90
91/*
92 * Mbus-L to Mbus bridge
93 */
94
95void *
96mvsoc_bridge_intr_establish(int ih, int ipl, int (*ih_func)(void *), void *arg)
97{
98
99	return intr_establish(mvsoc_bridge_pic.pic_irqbase + ih, ipl, 0,
100	    ih_func, arg);
101}
102
103/* ARGSUSED */
104static void
105mvsoc_bridge_pic_unblock_irqs(struct pic_softc *pic, size_t irqbase,
106			      uint32_t irq_mask)
107{
108
109	write_mlmbreg(MVSOC_MLMB_MLMBICR,
110	    read_mlmbreg(MVSOC_MLMB_MLMBICR) & ~irq_mask);
111	write_mlmbreg(MVSOC_MLMB_MLMBIMR,
112	    read_mlmbreg(MVSOC_MLMB_MLMBIMR) | irq_mask);
113}
114
115/* ARGSUSED */
116static void
117mvsoc_bridge_pic_block_irqs(struct pic_softc *pic, size_t irqbase,
118			    uint32_t irq_mask)
119{
120
121	write_mlmbreg(MVSOC_MLMB_MLMBIMR,
122	    read_mlmbreg(MVSOC_MLMB_MLMBIMR) & ~irq_mask);
123}
124
125static int
126mvsoc_bridge_pic_find_pending_irqs(struct pic_softc *pic)
127{
128	uint32_t pending;
129
130	pending =
131	    read_mlmbreg(MVSOC_MLMB_MLMBICR) & read_mlmbreg(MVSOC_MLMB_MLMBIMR);
132
133	if (pending == 0)
134		return 0;
135
136	return pic_mark_pending_sources(pic, 0, pending);
137}
138
139/* ARGSUSED */
140static void
141mvsoc_bridge_pic_establish_irq(struct pic_softc *pic, struct intrsource *is)
142{
143	/* Nothing */
144}
145
146static void
147mvsoc_bridge_pic_source_name(struct pic_softc *pic, int irq, char *buf,
148			     size_t len)
149{
150
151	strlcpy(buf, sources[irq], len);
152}
153