sys/arch/arm/xscale/ixp425_intr.h

   1 /*      $NetBSD: ixp425_intr.h,v 1.8 2008/04/27 18:58:45 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/cpu.h>
  46 #include <arm/armreg.h>
  47 #include <arm/cpufunc.h>
  48
  49 #include <arm/xscale/ixp425reg.h>
  50
  51 #define IXPREG(reg)     *((volatile u_int32_t*) (reg))
  52
  53 static inline void __attribute__((__unused__))
  54 ixp425_set_intrmask(void)
  55 {
  56         extern volatile uint32_t intr_enabled;
  57
  58         IXPREG(IXP425_INT_ENABLE) = intr_enabled & IXP425_INT_HWMASK;
  59 }
  60
  61 static inline void __attribute__((__unused__))
  62 ixp425_splx(int ipl)
  63 {
  64         extern int ixp425_imask[];
  65         extern volatile uint32_t intr_enabled;
  66         extern volatile int ixp425_ipending;
  67         int oldirqstate, hwpend;
  68
  69         /* Don't let the compiler re-order this code with preceding code */
  70         __insn_barrier();
  71
  72         set_curcpl(ipl);
  73
  74         hwpend = (ixp425_ipending & IXP425_INT_HWMASK) & ~ixp425_imask[ipl];
  75         if (hwpend != 0) {
  76                 oldirqstate = disable_interrupts(I32_bit);
  77                 intr_enabled |= hwpend;
  78                 ixp425_set_intrmask();
  79                 restore_interrupts(oldirqstate);
  80         }
  81
  82 #ifdef __HAVE_FAST_SOFTINTS
  83         cpu_dosoftints();
  84 #endif
  85 }
  86
  87 static inline int __attribute__((__unused__))
  88 ixp425_splraise(int ipl)
  89 {
  90         int old = curcpl();
  91         set_curcpl(ipl);
  92
  93         /* Don't let the compiler re-order this code with subsequent code */
  94         __insn_barrier();
  95
  96         return (old);
  97 }
  98
  99 static inline int __attribute__((__unused__))
 100 ixp425_spllower(int ipl)
 101 {
 102         int old = curcpl();
 103         ixp425_splx(ipl);
 104         return(old);
 105 }
 106
 107 #if !defined(EVBARM_SPL_NOINLINE)
 108
 109 #define splx(new)               ixp425_splx(new)
 110 #define _spllower(ipl)          ixp425_spllower(ipl)
 111 #define _splraise(ipl)          ixp425_splraise(ipl)
 112
 113 #else
 114
 115 int     _splraise(int);
 116 int     _spllower(int);
 117 void    splx(int);
 118
 119 #endif /* ! EVBARM_SPL_NOINLINE */
 120
 121 #endif /* _LOCORE */
 122
 123 #endif /* _IXP425_INTR_H_ */