1 /* $NetBSD: intr.h,v 1.6 1997/10/10 05:54:51 scottr Exp $ */ 2 3 /* 4 * Copyright (C) 1997 Scott Reynolds 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _MAC68K_INTR_H_ 31 #define _MAC68K_INTR_H_ 32 33 #ifdef _KERNEL 34 /* 35 * spl functions; all but spl0 are done in-line 36 */ 37 38 #define _spl(s) \ 39 ({ \ 40 register int _spl_r; \ 41 \ 42 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 43 "&=d" (_spl_r) : "di" (s)); \ 44 _spl_r; \ 45 }) 46 47 #define _splraise(s) \ 48 ({ \ 49 int _spl_r; \ 50 \ 51 __asm __volatile (" \ 52 clrl d0 ; \ 53 movw sr,d0 ; \ 54 movl d0,%0 ; \ 55 andw #0x700,d0 ; \ 56 movw %1,d1 ; \ 57 andw #0x700,d1 ; \ 58 cmpw d0,d1 ; \ 59 jle 1f ; \ 60 movw %1,sr ; \ 61 1:" : \ 62 "&=d" (_spl_r) : \ 63 "di" (s) : \ 64 "d0", "d1"); \ 65 _spl_r; \ 66 }) 67 68 /* spl0 requires checking for software interrupts */ 69 #define spl1() _spl(PSL_S|PSL_IPL1) 70 #define spl2() _spl(PSL_S|PSL_IPL2) 71 #define spl3() _spl(PSL_S|PSL_IPL3) 72 #define spl4() _spl(PSL_S|PSL_IPL4) 73 #define spl5() _spl(PSL_S|PSL_IPL5) 74 #define spl6() _spl(PSL_S|PSL_IPL6) 75 #define spl7() _spl(PSL_S|PSL_IPL7) 76 77 /* These spl calls are _not_ to be used by machine-independent code. */ 78 #define spladb() splhigh() 79 #define splzs() splserial() 80 #define splsoft() spl1() 81 82 /* 83 * These should be used for: 84 * 1) ensuring mutual exclusion (why use processor level?) 85 * 2) allowing faster devices to take priority 86 * 87 * Note that on the Mac, most things are masked at spl1, almost 88 * everything at spl2, and everything but the panic switch and 89 * power at spl4. 90 */ 91 #define splsoftclock() splsoft() 92 #define splsoftnet() splsoft() 93 #define spltty() _splraise(PSL_S|PSL_IPL1) 94 #define splbio() spl2() 95 #define splnet() spl2() 96 #define splimp() spl2() 97 #define splclock() spl2() 98 #define splstatclock() spl2() 99 #define splsched() spl3() 100 #define splserial() spl4() 101 #define splhigh() spl7() 102 103 /* watch out for side effects */ 104 #define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0()) 105 106 /* 107 * simulated software interrupt register 108 */ 109 extern volatile u_int8_t ssir; 110 111 #define SIR_NET 0x01 112 #define SIR_CLOCK 0x02 113 #define SIR_SERIAL 0x04 114 #define SIR_DTMGR 0x08 115 116 #define siron(mask) \ 117 __asm __volatile ( "orb %0,_ssir" : : "i" (mask)) 118 #define siroff(mask) \ 119 __asm __volatile ( "andb %0,_ssir" : : "ir" (~(mask))); 120 121 #define setsoftnet() siron(SIR_NET) 122 #define setsoftclock() siron(SIR_CLOCK) 123 #define setsoftserial() siron(SIR_SERIAL) 124 #define setsoftdtmgr() siron(SIR_DTMGR) 125 126 /* locore.s */ 127 int spl0 __P((void)); 128 #endif /* _KERNEL */ 129 130 #endif /* _MAC68K_INTR_H_ */ 131