sys/arch/arm/xscale/i80321_intr.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2001, 2002, 2006 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe and Steve C. Woodford 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 _I80321_INTR_H_
  39 #ifndef _NO_INTR_H_
  40 #define _I80321_INTR_H_
  41
  42 #define ARM_IRQ_HANDLER _C_LABEL(i80321_intr_dispatch)
  43
  44 #ifndef _LOCORE
  45
  46 #include <arm/armreg.h>
  47 #include <arm/cpufunc.h>
  48 #include <arm/cpu.h>
  49
  50 #include <arm/xscale/i80321reg.h>
  51
  52 #ifdef __PROG32
  53 static inline void __attribute__((__unused__))
  54 i80321_set_intrmask(void)
  55 {
  56         extern volatile uint32_t intr_enabled;
  57
  58         __asm volatile("mcr p6, 0, %0, c0, c0, 0"
  59                 :
  60                 : "r" (intr_enabled & ICU_INT_HWMASK));
  61 }
  62
  63 #define INT_HPIMASK     (1u << ICU_INT_HPI)
  64 extern volatile uint32_t intr_enabled;
  65 extern volatile int i80321_ipending;
  66 extern int i80321_imask[];
  67
  68 static inline void __attribute__((__unused__))
  69 i80321_splx(int new)
  70 {
  71         int oldirqstate, hwpend;
  72
  73         /* Don't let the compiler re-order this code with preceding code */
  74         __insn_barrier();
  75
  76         set_curcpl(new);
  77
  78         hwpend = (i80321_ipending & ICU_INT_HWMASK) & ~i80321_imask[new];
  79         if (hwpend != 0) {
  80                 oldirqstate = disable_interrupts(I32_bit);
  81                 intr_enabled |= hwpend;
  82                 i80321_set_intrmask();
  83 #ifdef I80321_HPI_ENABLED
  84                 if (__predict_false(hwpend & INT_HPIMASK))
  85                         oldirqstate &= ~I32_bit;
  86 #endif
  87                 restore_interrupts(oldirqstate);
  88         }
  89
  90 #ifdef __HAVE_FAST_SOFTINTS
  91         cpu_dosoftints();
  92 #endif
  93 }
  94
  95 static inline int __attribute__((__unused__))
  96 i80321_splraise(int ipl)
  97 {
  98         int old = curcpl();
  99         set_curcpl(ipl);
 100
 101         /* Don't let the compiler re-order this code with subsequent code */
 102         __insn_barrier();
 103
 104         return (old);
 105 }
 106
 107 static inline int __attribute__((__unused__))
 108 i80321_spllower(int ipl)
 109 {
 110         int old = curcpl();
 111         i80321_splx(ipl);
 112         return(old);
 113 }
 114
 115 #endif /* __PROG32 */
 116
 117 #if !defined(EVBARM_SPL_NOINLINE)
 118
 119 #define splx(new)               i80321_splx(new)
 120 #define _spllower(ipl)          i80321_spllower(ipl)
 121 #define _splraise(ipl)          i80321_splraise(ipl)
 122 void    _setsoftintr(int);
 123
 124 #else
 125
 126 int     _splraise(int);
 127 int     _spllower(int);
 128 void    splx(int);
 129 void    _setsoftintr(int);
 130
 131 #endif /* ! EVBARM_SPL_NOINLINE */
 132
 133 #endif /* _LOCORE */
 134
 135 #endif /* _NO_INTR_H_ */
 136 #endif /* _I80321_INTR_H_ */