1 /*- 2 * Copyright (c) 1993 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $Id: cpufunc.h,v 1.19 1994/08/23 13:41:37 paul Exp $ 34 */ 35 36 /* 37 * Functions to provide access to special i386 instructions. 38 * XXX - bezillions more are defined in locore.s but are not declared anywhere. 39 */ 40 41 #ifndef _MACHINE_CPUFUNC_H_ 42 #define _MACHINE_CPUFUNC_H_ 1 43 44 #include <sys/cdefs.h> 45 #include <sys/types.h> 46 47 #include <machine/spl.h> 48 49 #ifdef __GNUC__ 50 51 static inline int bdb(void) 52 { 53 extern int bdb_exists; 54 55 if (!bdb_exists) 56 return (0); 57 __asm("int $3"); 58 return (1); 59 } 60 61 static inline void 62 disable_intr(void) 63 { 64 __asm __volatile("cli"); 65 } 66 67 static inline void 68 enable_intr(void) 69 { 70 __asm __volatile("sti"); 71 } 72 73 static inline u_char 74 inb(u_int port) 75 { 76 u_char data; 77 /* 78 * We use %%dx and not %1 here because i/o is done at %dx and not at 79 * %edx, while gcc-2.2.2 generates inferior code (movw instead of movl) 80 * if we tell it to load (u_short) port. 81 */ 82 __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 83 return data; 84 } 85 86 static inline void 87 outb(u_int port, u_char data) 88 { 89 u_char al; 90 91 al = data; /* help gcc-1.40's register allocator */ 92 __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 93 } 94 95 static inline void 96 pmap_update() 97 { 98 __asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax"); 99 } 100 101 static inline u_long 102 rcr2() 103 { 104 u_long data; 105 __asm __volatile("movl %%cr2,%%eax" : "=a" (data)); 106 return data; 107 } 108 109 struct quehead { 110 struct quehead *qh_link; 111 struct quehead *qh_rlink; 112 }; 113 114 static inline void 115 insque(void *a, void *b) 116 { 117 register struct quehead *element = a, *head = b; 118 element->qh_link = head->qh_link; 119 head->qh_link = (struct quehead *)element; 120 element->qh_rlink = (struct quehead *)head; 121 ((struct quehead *)(element->qh_link))->qh_rlink 122 = (struct quehead *)element; 123 } 124 125 static inline void 126 remque(void *a) 127 { 128 register struct quehead *element = a; 129 ((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink; 130 ((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link; 131 element->qh_rlink = 0; 132 } 133 134 #else /* not __GNUC__ */ 135 extern void insque __P((void *, void *)); 136 extern void remque __P((void *)); 137 138 int bdb __P((void)); 139 void disable_intr __P((void)); 140 void enable_intr __P((void)); 141 u_char inb __P((u_int port)); 142 void outb __P((u_int port, u_int data)); /* XXX - incompat */ 143 144 #endif /* __GNUC__ */ 145 146 void load_cr0 __P((u_int cr0)); 147 u_int rcr0 __P((void)); 148 void load_cr3(u_long); 149 u_long rcr3(void); 150 extern void DELAY(int); 151 152 void setidt __P((int, void (*)(), int, int)); 153 extern u_long kvtop(void *); 154 extern void outw(int /*u_short*/, int /*u_short*/); /* XXX inline!*/ 155 extern void outsb(int /*u_short*/, void *, size_t); 156 extern void outsw(int /*u_short*/, void *, size_t); 157 extern void insw(int /*u_short*/, void *, size_t); 158 extern void fillw(int /*u_short*/, void *, size_t); 159 extern void filli(int, void *, size_t); 160 161 #endif /* _MACHINE_CPUFUNC_H_ */ 162