sys/arch/hp300/include/intr.h

   1 /*      $NetBSD: intr.h,v 1.32 2008/12/21 17:42:05 tsutsui Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1996, 1997, 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _HP300_INTR_H_
  33 #define _HP300_INTR_H_
  34
  35 #include <sys/evcnt.h>
  36 #include <sys/queue.h>
  37 #include <machine/psl.h>
  38
  39 /*
  40  * Interrupt "levels".  These are a more abstract representation
  41  * of interrupt levels, and do not have the same meaning as m68k
  42  * CPU interrupt levels.  They serve the following purposes:
  43  *
  44  *      - properly order ISRs in the list for that CPU ipl
  45  *      - compute CPU PSL values for the spl*() calls.
  46  *      - used to create cookie for the splraiseipl().
  47  */
  48 #define IPL_NONE        0
  49 #define IPL_SOFTCLOCK   1
  50 #define IPL_SOFTBIO     2
  51 #define IPL_SOFTNET     3
  52 #define IPL_SOFTSERIAL  4
  53 #define IPL_VM          5
  54 #define IPL_SCHED       6
  55 #define IPL_HIGH        7
  56 #define NIPL            8
  57
  58 /*
  59  * Convert PSL values to m68k CPU IPLs and vice-versa.
  60  * Note: CPU IPL values are different from IPL_* used by splraiseipl().
  61  */
  62 #define PSLTOIPL(x)     (((x) >> 8) & 0xf)
  63 #define IPLTOPSL(x)     ((((x) & 0xf) << 8) | PSL_S)
  64
  65 extern int idepth;
  66
  67 static inline bool
  68 cpu_intr_p(void)
  69 {
  70
  71         return idepth != 0;
  72 }
  73
  74 extern const uint16_t ipl2psl_table[NIPL];
  75
  76 typedef int ipl_t;
  77 typedef struct {
  78         uint16_t _psl;
  79 } ipl_cookie_t;
  80
  81 static inline ipl_cookie_t
  82 makeiplcookie(ipl_t ipl)
  83 {
  84
  85         return (ipl_cookie_t){._psl = ipl2psl_table[ipl]};
  86 }
  87
  88 static inline int
  89 splraiseipl(ipl_cookie_t icookie)
  90 {
  91
  92         return _splraise(icookie._psl);
  93 }
  94
  95 static inline void
  96 splx(int sr)
  97 {
  98
  99         __asm volatile("movew %0,%%sr" : : "di" (sr));
 100 }
 101
 102 /* These spl calls are _not_ to be used by machine-independent code. */
 103 #define splhil()        splraise1()
 104 #define splkbd()        splhil()
 105
 106 /* These spl calls are used by machine-independent code. */
 107 #define spl0()          _spl0()
 108
 109 #define splsoftbio()    splraise1()
 110 #define splsoftclock()  splraise1()
 111 #define splsoftnet()    splraise1()
 112 #define splsoftserial() splraise1()
 113 #define splvm()         splraise5()
 114 #define splsched()      spl6()
 115 #define splhigh()       spl7()
 116
 117 struct hp300_intrhand {
 118         LIST_ENTRY(hp300_intrhand) ih_q;
 119         int (*ih_fn)(void *);
 120         void *ih_arg;
 121         int ih_ipl;
 122         int ih_priority;
 123 };
 124
 125 struct hp300_intr {
 126         LIST_HEAD(, hp300_intrhand) hi_q;
 127         struct evcnt hi_evcnt;
 128 };
 129
 130 /* intr.c */
 131 void    intr_init(void);
 132 void    *intr_establish(int (*)(void *), void *, int, int);
 133 void    intr_disestablish(void *);
 134 void    intr_dispatch(int);
 135
 136 #endif /* _HP300_INTR_H_ */