1 /* $NetBSD: intr.h,v 1.17 2007/12/04 15:12:07 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Matt Fredette. 5 * Copyright (c) 1998 Matt Thomas. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the company nor the names of the authors may be used to 17 * endorse or promote products derived from this software without specific 18 * prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR IMPLIED 21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef _SUN68K_INTR_H_ 34 #define _SUN68K_INTR_H_ 35 36 #include <sys/queue.h> 37 #include <m68k/psl.h> 38 39 /* 40 * Interrupt levels. 41 */ 42 #define IPL_NONE 0 43 #define IPL_SOFTCLOCK 1 44 #define IPL_SOFTBIO 2 45 #define IPL_SOFTNET 3 46 #define IPL_SOFTSERIAL 4 47 #define IPL_VM 5 48 #define IPL_SCHED 6 49 #define IPL_HIGH 7 50 51 #define _IPL_SOFT_LEVEL1 1 52 #define _IPL_SOFT_LEVEL2 2 53 #define _IPL_SOFT_LEVEL3 3 54 #define _IPL_SOFT_LEVEL_MIN 1 55 #define _IPL_SOFT_LEVEL_MAX 3 56 57 #ifdef _KERNEL 58 59 typedef int ipl_t; 60 typedef struct { 61 uint16_t _psl; 62 } ipl_cookie_t; 63 64 ipl_cookie_t makeiplcookie(ipl_t ipl); 65 66 static inline int 67 splraiseipl(ipl_cookie_t icookie) 68 { 69 70 return _splraise(icookie._psl); 71 } 72 73 /* These connect interrupt handlers. */ 74 typedef int (*isr_func_t)(void *); 75 void isr_add_autovect(isr_func_t, void *, int); 76 void isr_add_vectored(isr_func_t, void *, int, int); 77 void isr_add_custom(int, void *); 78 79 /* 80 * Define inline functions for PSL manipulation. 81 * These are as close to macros as one can get. 82 * When not optimizing gcc will call the locore.s 83 * functions by the same names, so breakpoints on 84 * these functions will work normally, etc. 85 * (See the GCC extensions info document.) 86 */ 87 88 static __inline int _getsr(void); 89 90 /* Get current sr value. */ 91 static __inline int 92 _getsr(void) 93 { 94 int rv; 95 96 __asm volatile ("clrl %0; movew %%sr,%0" : "=&d" (rv)); 97 return (rv); 98 } 99 100 /* 101 * The rest of this is sun68k specific, because other ports may 102 * need to do special things in spl0() (i.e. simulate SIR). 103 * Suns have a REAL interrupt register, so spl0() and splx(s) 104 * have no need to check for any simulated interrupts, etc. 105 */ 106 107 #define spl0() _spl0() /* we have real software interrupts */ 108 #define splx(x) _spl(x) 109 110 /* IPL used by soft interrupts: netintr(), softclock() */ 111 #define splsoftclock() splraise1() 112 #define splsoftbio() splraise1() 113 #define splsoftnet() splraise1() 114 #define splsoftserial() splraise3() 115 116 /* 117 * Note that the VM code runs at spl7 during kernel 118 * initialization, and later at spl0, so we have to 119 * use splraise to avoid enabling interrupts early. 120 */ 121 #define splvm() splraise4() 122 123 /* Zilog Serial hardware interrupts (hard-wired at 6) */ 124 #define splzs() splserial() 125 #define IPL_ZS IPL_SERIAL 126 127 /* Block out all interrupts (except NMI of course). */ 128 #define splhigh() spl7() 129 #define splsched() spl7() 130 131 /* This returns true iff the spl given is spl0. */ 132 #define is_spl0(s) (((s) & PSL_IPL7) == 0) 133 134 #endif /* _KERNEL */ 135 136 #endif /* _SUN68K_INTR_H */ 137