1 /* $NetBSD: ixp425_intr.h,v 1.11 2023/08/01 10:35:42 rin 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 _IXP425_INTR_H_
39 #define _IXP425_INTR_H_
40
41 #define ARM_IRQ_HANDLER _C_LABEL(ixp425_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 <arm/xscale/ixp425reg.h>
50
51 #define IXPREG(reg) *((volatile uint32_t*) (reg))
52
53 static inline void __attribute__((__unused__))
ixp425_set_intrmask(void)54 ixp425_set_intrmask(void)
55 {
56 extern volatile uint32_t intr_enabled;
57
58 IXPREG(IXP425_INT_ENABLE) = intr_enabled & IXP425_INT_HWMASK;
59 }
60
61 static inline void __attribute__((__unused__))
ixp425_splx(int ipl)62 ixp425_splx(int ipl)
63 {
64 extern int ixp425_imask[];
65 extern volatile uint32_t intr_enabled;
66 extern volatile int ixp425_ipending;
67 int oldirqstate, hwpend;
68
69 /* Don't let the compiler re-order this code with preceding code */
70 __insn_barrier();
71
72 set_curcpl(ipl);
73
74 hwpend = (ixp425_ipending & IXP425_INT_HWMASK) & ~ixp425_imask[ipl];
75 if (hwpend != 0) {
76 oldirqstate = disable_interrupts(I32_bit);
77 intr_enabled |= hwpend;
78 ixp425_set_intrmask();
79 restore_interrupts(oldirqstate);
80 }
81
82 #ifdef __HAVE_FAST_SOFTINTS
83 cpu_dosoftints();
84 #endif
85 }
86
87 static inline int __attribute__((__unused__))
ixp425_splraise(int ipl)88 ixp425_splraise(int ipl)
89 {
90 int old = curcpl();
91
92 if (ipl <= old)
93 return (old);
94
95 set_curcpl(ipl);
96
97 /* Don't let the compiler re-order this code with subsequent code */
98 __insn_barrier();
99
100 return (old);
101 }
102
103 static inline int __attribute__((__unused__))
ixp425_spllower(int ipl)104 ixp425_spllower(int ipl)
105 {
106 int old = curcpl();
107 ixp425_splx(ipl);
108 return(old);
109 }
110
111 #if !defined(EVBARM_SPL_NOINLINE)
112
113 #define splx(new) ixp425_splx(new)
114 #define _spllower(ipl) ixp425_spllower(ipl)
115 #define _splraise(ipl) ixp425_splraise(ipl)
116
117 #else
118
119 int _splraise(int);
120 int _spllower(int);
121 void splx(int);
122
123 #endif /* ! EVBARM_SPL_NOINLINE */
124
125 #endif /* _LOCORE */
126
127 #endif /* _IXP425_INTR_H_ */
128