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ifpga_intr.h revision 1.7 
      1 /*	$NetBSD: ifpga_intr.h,v 1.7 2008/01/06 01:37:58 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/armreg.h>
     46 #include <arm/cpufunc.h>
     47 
     48 #include <evbarm/ifpga/ifpgareg.h>
     49 #include <evbarm/ifpga/ifpgavar.h>
     50 
     51 #ifdef __HAVE_FAST_SOFTINTS
     52 void ifpga_do_pending(void);
     53 #endif
     54 
     55 static inline void __attribute__((__unused__))
     56 ifpga_set_intrmask(void)
     57 {
     58 	extern volatile uint32_t intr_enabled;
     59 	extern struct ifpga_softc *ifpga_sc;
     60 	uint32_t mask = intr_enabled;
     61 
     62 	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
     63 	    IFPGA_INTR_ENABLECLR, ~mask);
     64 	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
     65 	    IFPGA_INTR_ENABLESET, mask);
     66 }
     67 
     68 #ifdef __HAVE_FAST_SOFTINTS
     69 #define INT_SWMASK				\
     70         (IFPGA_INTR_bit31 | IFPGA_INTR_bit30 |	\
     71          IFPGA_INTR_bit29 | IFPGA_INTR_bit28)
     72 #endif
     73 
     74 static inline void __attribute__((__unused__))
     75 ifpga_splx(int new)
     76 {
     77 	extern volatile uint32_t intr_enabled;
     78 	extern volatile int current_spl_level;
     79 	extern volatile int ifpga_ipending;
     80 	int oldirqstate, hwpend;
     81 
     82 	__insn_barrier();
     83 
     84 	oldirqstate = disable_interrupts(I32_bit);
     85 	current_spl_level = new;
     86 
     87 	hwpend = (ifpga_ipending & IFPGA_INTR_HWMASK) & ~new;
     88 	if (hwpend != 0) {
     89 		intr_enabled |= hwpend;
     90 		ifpga_set_intrmask();
     91 	}
     92 
     93 	restore_interrupts(oldirqstate);
     94 
     95 #ifdef __HAVE_FAST_SOFTINTS
     96 	if ((ifpga_ipending & INT_SWMASK) & ~new)
     97 		ifpga_do_pending();
     98 #endif
     99 }
    100 
    101 static inline int __attribute__((__unused__))
    102 ifpga_splraise(int ipl)
    103 {
    104 	extern volatile int current_spl_level;
    105 	extern int ifpga_imask[];
    106 	int	old;
    107 
    108 	old = current_spl_level;
    109 	current_spl_level = old | ifpga_imask[ipl];
    110 
    111 	__insn_barrier();
    112 
    113 	return (old);
    114 }
    115 
    116 static inline int __attribute__((__unused__))
    117 ifpga_spllower(int ipl)
    118 {
    119 	extern volatile int current_spl_level;
    120 	extern int ifpga_imask[];
    121 	int old = current_spl_level;
    122 
    123 	ifpga_splx(ifpga_imask[ipl]);
    124 	return(old);
    125 }
    126 
    127 #if !defined(EVBARM_SPL_NOINLINE)
    128 
    129 #define splx(new)		ifpga_splx(new)
    130 #define	_spllower(ipl)		ifpga_spllower(ipl)
    131 #define	_splraise(ipl)		ifpga_splraise(ipl)
    132 #ifdef __HAVE_FAST_SOFTINTS
    133 void	_setsoftintr(int);
    134 #endif
    135 
    136 #else
    137 
    138 int	_splraise(int);
    139 int	_spllower(int);
    140 void	splx(int);
    141 #ifdef __HAVE_FAST_SOFTINTS
    142 void	_setsoftintr(int);
    143 #endif
    144 
    145 #endif /* ! EVBARM_SPL_NOINLINE */
    146 
    147 #endif /* _LOCORE */
    148 
    149 #endif /* _IFPGA_INTR_H_ */
    150