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      1 /*	$NetBSD: ifpga_intr.h,v 1.9 2009/02/13 21:08:40 he 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/cpu.h>
     46 #include <arm/armreg.h>
     47 #include <arm/cpufunc.h>
     48 
     49 #include <evbarm/ifpga/ifpgareg.h>
     50 #include <evbarm/ifpga/ifpgavar.h>
     51 
     52 static inline void __attribute__((__unused__))
     53 ifpga_set_intrmask(void)
     54 {
     55 	extern volatile uint32_t intr_enabled;
     56 	extern struct ifpga_softc *ifpga_sc;
     57 	uint32_t mask = intr_enabled;
     58 
     59 	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
     60 	    IFPGA_INTR_ENABLECLR, ~mask);
     61 	bus_space_write_4 (ifpga_sc->sc_iot, ifpga_sc->sc_irq_ioh,
     62 	    IFPGA_INTR_ENABLESET, mask);
     63 }
     64 
     65 static inline void __attribute__((__unused__))
     66 ifpga_splx(int new)
     67 {
     68 	extern volatile uint32_t intr_enabled;
     69 	extern volatile int ifpga_ipending;
     70 	int oldirqstate, hwpend;
     71 
     72 	__insn_barrier();
     73 
     74 	oldirqstate = disable_interrupts(I32_bit);
     75 	set_curcpl(new);
     76 
     77 	hwpend = (ifpga_ipending & IFPGA_INTR_HWMASK) & ~new;
     78 	if (hwpend != 0) {
     79 		intr_enabled |= hwpend;
     80 		ifpga_set_intrmask();
     81 	}
     82 
     83 	restore_interrupts(oldirqstate);
     84 
     85 #ifdef __HAVE_FAST_SOFTINTS
     86 	cpu_dosoftints();
     87 #endif
     88 }
     89 
     90 static inline int __attribute__((__unused__))
     91 ifpga_splraise(int ipl)
     92 {
     93 	extern int ifpga_imask[];
     94 	const int old = curcpl();
     95 	set_curcpl(old | ifpga_imask[ipl]);
     96 
     97 	__insn_barrier();
     98 
     99 	return (old);
    100 }
    101 
    102 static inline int __attribute__((__unused__))
    103 ifpga_spllower(int ipl)
    104 {
    105 	extern int ifpga_imask[];
    106 	const int old = curcpl();
    107 
    108 	ifpga_splx(ifpga_imask[ipl]);
    109 	return(old);
    110 }
    111 
    112 #if !defined(EVBARM_SPL_NOINLINE)
    113 
    114 #define splx(new)		ifpga_splx(new)
    115 #define	_spllower(ipl)		ifpga_spllower(ipl)
    116 #define	_splraise(ipl)		ifpga_splraise(ipl)
    117 
    118 #else
    119 
    120 int	_splraise(int);
    121 int	_spllower(int);
    122 void	splx(int);
    123 
    124 #endif /* ! EVBARM_SPL_NOINLINE */
    125 
    126 #endif /* _LOCORE */
    127 
    128 #endif /* _IFPGA_INTR_H_ */
    129