1/*	$NetBSD: ifpga_intr.h,v 1.8 2008/04/27 18:58:46 matt Exp $	*/
2
3/*
4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed for the NetBSD Project by
20 *	Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#ifndef _IFPGA_INTR_H_
39#define _IFPGA_INTR_H_
40
41#define	ARM_IRQ_HANDLER	_C_LABEL(ifpga_intr_dispatch)
42
43#ifndef _LOCORE
44
45#include <arm/cpu.h>
46#include <arm/armreg.h>
47#include <arm/cpufunc.h>
48
49#include <evbarm/ifpga/ifpgareg.h>
50#include <evbarm/ifpga/ifpgavar.h>
51
52static inline void __attribute__((__unused__))
53ifpga_set_intrmask(void)
54{
55	extern volatile uint32_t intr_enabled;
56	extern struct ifpga_softc *ifpga_sc;
57	uint32_t mask = intr_enabled;
58
59	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
60	    IFPGA_INTR_ENABLECLR, ~mask);
61	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
62	    IFPGA_INTR_ENABLESET, mask);
63}
64
65static inline void __attribute__((__unused__))
66ifpga_splx(int new)
67{
68	extern volatile uint32_t intr_enabled;
69	extern volatile int ifpga_ipending;
70	int oldirqstate, hwpend;
71
72	__insn_barrier();
73
74	oldirqstate = disable_interrupts(I32_bit);
75	set_curcpl(new);
76
77	hwpend = (ifpga_ipending & IFPGA_INTR_HWMASK) & ~new;
78	if (hwpend != 0) {
79		intr_enabled |= hwpend;
80		ifpga_set_intrmask();
81	}
82
83	restore_interrupts(oldirqstate);
84
85#ifdef __HAVE_FAST_SOFTINTS
86	cpu_dosoftints();
87#endif
88}
89
90static inline int __attribute__((__unused__))
91ifpga_splraise(int ipl)
92{
93	extern int ifpga_imask[];
94	const int old = curcpl();
95	set_curcpl(old | ifpga_imask[ipl]);
96
97	__insn_barrier();
98
99	return (old);
100}
101
102static inline int __attribute__((__unused__))
103ifpga_spllower(int ipl)
104{
105	extern int ifpga_imask[];
106	const int old = curcpl();
107
108	ifpga_splx(ifpga_imask[ipl]);
109	return(old);
110}
111
112#if !defined(EVBARM_SPL_NOINLINE)
113
114#define splx(new)		ifpga_splx(new)
115#define	_spllower(ipl)		ifpga_spllower(ipl)
116#define	_splraise(ipl)		ifpga_splraise(ipl)
117
118#else
119
120int	_splraise(int);
121int	_spllower(int);
122void	splx(int);
123
124#endif /* ! EVBARM_SPL_NOINLINE */
125
126#endif /* _LOCORE */
127
128#endif /* _IFPGA_INTR_H_ */
129