1/*	$NetBSD: i80321_intr.h,v 1.13 2021/08/06 08:58:42 rin Exp $	*/
2
3/*
4 * Copyright (c) 2001, 2002, 2006 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe and Steve C. Woodford 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 _I80321_INTR_H_
39#ifndef _NO_INTR_H_
40#define _I80321_INTR_H_
41
42#define	ARM_IRQ_HANDLER	_C_LABEL(i80321_intr_dispatch)
43
44#ifndef _LOCORE
45
46#include <arm/armreg.h>
47#include <arm/cpufunc.h>
48#include <arm/cpu.h>
49
50#include <arm/xscale/i80321reg.h>
51
52static inline void __attribute__((__unused__))
53i80321_set_intrmask(void)
54{
55	extern volatile uint32_t intr_enabled;
56
57	__asm volatile("mcr p6, 0, %0, c0, c0, 0"
58		:
59		: "r" (intr_enabled & ICU_INT_HWMASK));
60}
61
62#define INT_HPIMASK	(1u << ICU_INT_HPI)
63extern volatile uint32_t intr_enabled;
64extern volatile int i80321_ipending;
65extern int i80321_imask[];
66
67static inline void __attribute__((__unused__))
68i80321_splx(int new)
69{
70	int oldirqstate, hwpend;
71
72	/* Don't let the compiler re-order this code with preceding code */
73	__insn_barrier();
74
75	set_curcpl(new);
76
77	hwpend = (i80321_ipending & ICU_INT_HWMASK) & ~i80321_imask[new];
78	if (hwpend != 0) {
79		oldirqstate = disable_interrupts(I32_bit);
80		intr_enabled |= hwpend;
81		i80321_set_intrmask();
82#ifdef I80321_HPI_ENABLED
83		if (__predict_false(hwpend & INT_HPIMASK))
84			oldirqstate &= ~I32_bit;
85#endif
86		restore_interrupts(oldirqstate);
87	}
88
89#ifdef __HAVE_FAST_SOFTINTS
90	cpu_dosoftints();
91#endif
92}
93
94static inline int __attribute__((__unused__))
95i80321_splraise(int ipl)
96{
97	int old = curcpl();
98
99	if (ipl > old) {
100		set_curcpl(ipl);
101		/*
102		 * Don't let the compiler re-order this code with
103		 * subsequent code
104		 */
105		__insn_barrier();
106	}
107
108	return (old);
109}
110
111static inline int __attribute__((__unused__))
112i80321_spllower(int ipl)
113{
114	int old = curcpl();
115	i80321_splx(ipl);
116	return(old);
117}
118
119
120#if !defined(EVBARM_SPL_NOINLINE)
121
122#define splx(new)		i80321_splx(new)
123#define	_spllower(ipl)		i80321_spllower(ipl)
124#define	_splraise(ipl)		i80321_splraise(ipl)
125
126#else
127
128int	_splraise(int);
129int	_spllower(int);
130void	splx(int);
131
132#endif /* ! EVBARM_SPL_NOINLINE */
133
134#endif /* _LOCORE */
135
136#endif /* _NO_INTR_H_ */
137#endif /* _I80321_INTR_H_ */
138