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ifpga_intr.h revision 1.5 
      1 /*	$NetBSD: ifpga_intr.h,v 1.5 2005/12/24 20:06:59 perry 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 void ifpga_do_pending(void);
     52 
     53 static inline void __attribute__((__unused__))
     54 ifpga_set_intrmask(void)
     55 {
     56 	extern volatile uint32_t intr_enabled;
     57 	extern struct ifpga_softc *ifpga_sc;
     58 	uint32_t mask = intr_enabled;
     59 
     60 	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
     61 	    IFPGA_INTR_ENABLECLR, ~mask);
     62 	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
     63 	    IFPGA_INTR_ENABLESET, mask);
     64 }
     65 
     66 #define INT_SWMASK				\
     67         (IFPGA_INTR_bit31 | IFPGA_INTR_bit30 |	\
     68          IFPGA_INTR_bit29 | IFPGA_INTR_bit28)
     69 
     70 static inline void __attribute__((__unused__))
     71 ifpga_splx(int new)
     72 {
     73 	extern volatile uint32_t intr_enabled;
     74 	extern volatile int current_spl_level;
     75 	extern volatile int ifpga_ipending;
     76 	extern void ifpga_do_pending(void);
     77 	int oldirqstate, hwpend;
     78 
     79 	__insn_barrier();
     80 
     81 	oldirqstate = disable_interrupts(I32_bit);
     82 	current_spl_level = new;
     83 
     84 	hwpend = (ifpga_ipending & IFPGA_INTR_HWMASK) & ~new;
     85 	if (hwpend != 0) {
     86 		intr_enabled |= hwpend;
     87 		ifpga_set_intrmask();
     88 	}
     89 
     90 	restore_interrupts(oldirqstate);
     91 
     92 	if ((ifpga_ipending & INT_SWMASK) & ~new)
     93 		ifpga_do_pending();
     94 }
     95 
     96 static inline int __attribute__((__unused__))
     97 ifpga_splraise(int ipl)
     98 {
     99 	extern volatile int current_spl_level;
    100 	extern int ifpga_imask[];
    101 	int	old;
    102 
    103 	old = current_spl_level;
    104 	current_spl_level = old | ifpga_imask[ipl];
    105 
    106 	__insn_barrier();
    107 
    108 	return (old);
    109 }
    110 
    111 static inline int __attribute__((__unused__))
    112 ifpga_spllower(int ipl)
    113 {
    114 	extern volatile int current_spl_level;
    115 	extern int ifpga_imask[];
    116 	int old = current_spl_level;
    117 
    118 	ifpga_splx(ifpga_imask[ipl]);
    119 	return(old);
    120 }
    121 
    122 #if !defined(EVBARM_SPL_NOINLINE)
    123 
    124 #define splx(new)		ifpga_splx(new)
    125 #define	_spllower(ipl)		ifpga_spllower(ipl)
    126 #define	_splraise(ipl)		ifpga_splraise(ipl)
    127 void	_setsoftintr(int);
    128 
    129 #else
    130 
    131 int	_splraise(int);
    132 int	_spllower(int);
    133 void	splx(int);
    134 void	_setsoftintr(int);
    135 
    136 #endif /* ! EVBARM_SPL_NOINLINE */
    137 
    138 #endif /* _LOCORE */
    139 
    140 #endif /* _IFPGA_INTR_H_ */
    141