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ixp425_intr.h revision 1.7 
      1 /*	$NetBSD: ixp425_intr.h,v 1.7 2008/01/08 02:07:53 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 _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/armreg.h>
     46 #include <arm/cpufunc.h>
     47 
     48 #include <arm/xscale/ixp425reg.h>
     49 
     50 #define IXPREG(reg)     *((volatile u_int32_t*) (reg))
     51 
     52 static inline void __attribute__((__unused__))
     53 ixp425_set_intrmask(void)
     54 {
     55 	extern volatile uint32_t intr_enabled;
     56 
     57 	IXPREG(IXP425_INT_ENABLE) = intr_enabled & IXP425_INT_HWMASK;
     58 }
     59 
     60 #ifdef __HAVE_FAST_SOFTINTS
     61 void ixp425_do_pending(void);
     62 
     63 #define INT_SWMASK						\
     64 	((1U << IXP425_INT_bit31) | (1U << IXP425_INT_bit30) |	\
     65 	 (1U << IXP425_INT_bit14) | (1U << IXP425_INT_bit11))
     66 #endif
     67 
     68 static inline void __attribute__((__unused__))
     69 ixp425_splx(int new)
     70 {
     71 	extern volatile uint32_t intr_enabled;
     72 	extern volatile int current_spl_level;
     73 	extern volatile int ixp425_ipending;
     74 	extern void ixp425_do_pending(void);
     75 	int oldirqstate, hwpend;
     76 
     77 	/* Don't let the compiler re-order this code with preceding code */
     78 	__insn_barrier();
     79 
     80 	current_spl_level = new;
     81 
     82 	hwpend = (ixp425_ipending & IXP425_INT_HWMASK) & ~new;
     83 	if (hwpend != 0) {
     84 		oldirqstate = disable_interrupts(I32_bit);
     85 		intr_enabled |= hwpend;
     86 		ixp425_set_intrmask();
     87 		restore_interrupts(oldirqstate);
     88 	}
     89 
     90 #ifdef __HAVE_FAST_SOFTINTS
     91 	if ((ixp425_ipending & INT_SWMASK) & ~new)
     92 		ixp425_do_pending();
     93 #endif
     94 }
     95 
     96 static inline int __attribute__((__unused__))
     97 ixp425_splraise(int ipl)
     98 {
     99 	extern volatile int current_spl_level;
    100 	extern int ixp425_imask[];
    101 	int	old;
    102 
    103 	old = current_spl_level;
    104 	current_spl_level |= ixp425_imask[ipl];
    105 
    106 	/* Don't let the compiler re-order this code with subsequent code */
    107 	__insn_barrier();
    108 
    109 	return (old);
    110 }
    111 
    112 static inline int __attribute__((__unused__))
    113 ixp425_spllower(int ipl)
    114 {
    115 	extern volatile int current_spl_level;
    116 	extern int ixp425_imask[];
    117 	int old = current_spl_level;
    118 
    119 	ixp425_splx(ixp425_imask[ipl]);
    120 	return(old);
    121 }
    122 
    123 #if !defined(EVBARM_SPL_NOINLINE)
    124 
    125 #define splx(new)		ixp425_splx(new)
    126 #define	_spllower(ipl)		ixp425_spllower(ipl)
    127 #define	_splraise(ipl)		ixp425_splraise(ipl)
    128 #ifdef __HAVE_FAST_SOFTINTS
    129 void	_setsoftintr(int);
    130 #endif
    131 
    132 #else
    133 
    134 int	_splraise(int);
    135 int	_spllower(int);
    136 void	splx(int);
    137 #ifdef __HAVE_FAST_SOFTINTS
    138 void	_setsoftintr(int);
    139 #endif
    140 
    141 #endif /* ! EVBARM_SPL_NOINLINE */
    142 
    143 #endif /* _LOCORE */
    144 
    145 #endif /* _IXP425_INTR_H_ */
    146