1 /* $NetBSD: ifpga_intr.h,v 1.9 2009/02/13 21:08:40 he 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
52 static inline void __attribute__((__unused__))
ifpga_set_intrmask(void)53 ifpga_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
65 static inline void __attribute__((__unused__))
ifpga_splx(int new)66 ifpga_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
90 static inline int __attribute__((__unused__))
ifpga_splraise(int ipl)91 ifpga_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
102 static inline int __attribute__((__unused__))
ifpga_spllower(int ipl)103 ifpga_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
120 int _splraise(int);
121 int _spllower(int);
122 void splx(int);
123
124 #endif /* ! EVBARM_SPL_NOINLINE */
125
126 #endif /* _LOCORE */
127
128 #endif /* _IFPGA_INTR_H_ */
129