sys/arch/evbarm/ifpga/ifpga_intr.h

   1 /*      $NetBSD: ifpga_intr.h,v 1.8 2008/04/27 18:58:46 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/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_ */