cpufunc.h revision 25178
152419Sjulian/*- 252419Sjulian * Copyright (c) 1993 The Regents of the University of California. 352419Sjulian * All rights reserved. 452419Sjulian * 552419Sjulian * Redistribution and use in source and binary forms, with or without 652419Sjulian * modification, are permitted provided that the following conditions 752419Sjulian * are met: 852419Sjulian * 1. Redistributions of source code must retain the above copyright 952419Sjulian * notice, this list of conditions and the following disclaimer. 1052419Sjulian * 2. Redistributions in binary form must reproduce the above copyright 1152419Sjulian * notice, this list of conditions and the following disclaimer in the 1252419Sjulian * documentation and/or other materials provided with the distribution. 1352419Sjulian * 3. All advertising materials mentioning features or use of this software 1452419Sjulian * must display the following acknowledgement: 1552419Sjulian * This product includes software developed by the University of 1652419Sjulian * California, Berkeley and its contributors. 1752419Sjulian * 4. Neither the name of the University nor the names of its contributors 1852419Sjulian * may be used to endorse or promote products derived from this software 1952419Sjulian * without specific prior written permission. 2052419Sjulian * 2152419Sjulian * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2252419Sjulian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2352419Sjulian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2452419Sjulian * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2552419Sjulian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2652419Sjulian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2752419Sjulian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2852419Sjulian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2952419Sjulian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3052419Sjulian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3152419Sjulian * SUCH DAMAGE. 3252419Sjulian * 3352419Sjulian * $Id: cpufunc.h,v 1.63 1997/04/26 11:45:36 peter Exp $ 3452419Sjulian */ 3552419Sjulian 3652419Sjulian/* 3752419Sjulian * Functions to provide access to special i386 instructions. 3852419Sjulian */ 3952419Sjulian 4052752Sjulian#ifndef _MACHINE_CPUFUNC_H_ 4152419Sjulian#define _MACHINE_CPUFUNC_H_ 4252419Sjulian 4352419Sjulian#include <sys/cdefs.h> 4452419Sjulian#include <sys/types.h> 4552419Sjulian#include <machine/smp.h> 4652419Sjulian 4752419Sjulian#ifdef KERNEL 4852419Sjulian#include "opt_smp.h" 4952419Sjulian#include "opt_smp_invltlb.h" 5052419Sjulian#endif 5152419Sjulian 5252419Sjulian#ifdef __GNUC__ 5352419Sjulian 5452419Sjulianstatic __inline void 5552419Sjulianbreakpoint(void) 5652419Sjulian{ 5752419Sjulian __asm __volatile("int $3"); 5852419Sjulian} 5952419Sjulian 6052752Sjulianstatic __inline void 6152752Sjuliandisable_intr(void) 6252752Sjulian{ 6352752Sjulian __asm __volatile("cli" : : : "memory"); 6452752Sjulian} 6552752Sjulian 6652752Sjulianstatic __inline void 6752752Sjulianenable_intr(void) 6852419Sjulian{ 6952419Sjulian __asm __volatile("sti"); 7052419Sjulian} 7152419Sjulian 7252419Sjulian#define HAVE_INLINE_FFS 7352419Sjulian 7452419Sjulianstatic __inline int 7552419Sjulianffs(int mask) 7652419Sjulian{ 7752419Sjulian int result; 7852419Sjulian /* 7952419Sjulian * bsfl turns out to be not all that slow on 486's. It can beaten 8052419Sjulian * using a binary search to reduce to 4 bits and then a table lookup, 8152419Sjulian * but only if the code is inlined and in the cache, and the code 8252419Sjulian * is quite large so inlining it probably busts the cache. 8352419Sjulian * 8452419Sjulian * Note that gcc-2's builtin ffs would be used if we didn't declare 8552419Sjulian * this inline or turn off the builtin. The builtin is faster but 8652419Sjulian * broken in gcc-2.4.5 and slower but working in gcc-2.5 and 2.6. 8752419Sjulian */ 8852419Sjulian __asm __volatile("testl %0,%0; je 1f; bsfl %0,%0; incl %0; 1:" 8952419Sjulian : "=r" (result) : "0" (mask)); 9052419Sjulian return (result); 9152419Sjulian} 9252419Sjulian 9352419Sjulian#define HAVE_INLINE_FLS 9452419Sjulian 9552419Sjulianstatic __inline int 9652419Sjulianfls(int mask) 9752419Sjulian{ 9852419Sjulian int result; 9952419Sjulian __asm __volatile("testl %0,%0; je 1f; bsrl %0,%0; incl %0; 1:" 10052419Sjulian : "=r" (result) : "0" (mask)); 10152419Sjulian return (result); 10252419Sjulian} 10352419Sjulian 10452419Sjulian#if __GNUC__ < 2 10552419Sjulian 10652419Sjulian#define inb(port) inbv(port) 10752419Sjulian#define outb(port, data) outbv(port, data) 10852419Sjulian 10952419Sjulian#else /* __GNUC >= 2 */ 11052419Sjulian 11152419Sjulian/* 11252419Sjulian * The following complications are to get around gcc not having a 11352419Sjulian * constraint letter for the range 0..255. We still put "d" in the 11452419Sjulian * constraint because "i" isn't a valid constraint when the port 11552419Sjulian * isn't constant. This only matters for -O0 because otherwise 11652419Sjulian * the non-working version gets optimized away. 11752419Sjulian * 11852419Sjulian * Use an expression-statement instead of a conditional expression 11952419Sjulian * because gcc-2.6.0 would promote the operands of the conditional 12052419Sjulian * and produce poor code for "if ((inb(var) & const1) == const2)". 12152419Sjulian * 12252419Sjulian * The unnecessary test `(port) < 0x10000' is to generate a warning if 12352419Sjulian * the `port' has type u_short or smaller. Such types are pessimal. 12452419Sjulian * This actually only works for signed types. The range check is 12552419Sjulian * careful to avoid generating warnings. 12652419Sjulian */ 12752419Sjulian#define inb(port) __extension__ ({ \ 12852419Sjulian u_char _data; \ 12952419Sjulian if (__builtin_constant_p(port) && ((port) & 0xffff) < 0x100 \ 13052419Sjulian && (port) < 0x10000) \ 13152419Sjulian _data = inbc(port); \ 13252419Sjulian else \ 13352419Sjulian _data = inbv(port); \ 13452419Sjulian _data; }) 13552419Sjulian 13652419Sjulian#define outb(port, data) ( \ 13752419Sjulian __builtin_constant_p(port) && ((port) & 0xffff) < 0x100 \ 13852419Sjulian && (port) < 0x10000 \ 13952419Sjulian ? outbc(port, data) : outbv(port, data)) 14052419Sjulian 14152419Sjulianstatic __inline u_char 14252419Sjulianinbc(u_int port) 14352419Sjulian{ 14452419Sjulian u_char data; 14552419Sjulian 14652419Sjulian __asm __volatile("inb %1,%0" : "=a" (data) : "id" ((u_short)(port))); 14752419Sjulian return (data); 14852419Sjulian} 14952419Sjulian 15052419Sjulianstatic __inline void 15152419Sjulianoutbc(u_int port, u_char data) 15252419Sjulian{ 15352419Sjulian __asm __volatile("outb %0,%1" : : "a" (data), "id" ((u_short)(port))); 15452419Sjulian} 15552419Sjulian 15652419Sjulian#endif /* __GNUC <= 2 */ 15752419Sjulian 15852419Sjulianstatic __inline u_char 15952419Sjulianinbv(u_int port) 16052419Sjulian{ 16152419Sjulian u_char data; 16252419Sjulian /* 16352419Sjulian * We use %%dx and not %1 here because i/o is done at %dx and not at 16452419Sjulian * %edx, while gcc generates inferior code (movw instead of movl) 16552419Sjulian * if we tell it to load (u_short) port. 16652419Sjulian */ 16752419Sjulian __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); 16852419Sjulian return (data); 16952419Sjulian} 17052419Sjulian 17152419Sjulianstatic __inline u_long 17252419Sjulianinl(u_int port) 17352419Sjulian{ 17452419Sjulian u_long data; 17552419Sjulian 17652419Sjulian __asm __volatile("inl %%dx,%0" : "=a" (data) : "d" (port)); 17752419Sjulian return (data); 17852419Sjulian} 17952419Sjulian 18052419Sjulianstatic __inline void 18152419Sjulianinsb(u_int port, void *addr, size_t cnt) 18252419Sjulian{ 18352419Sjulian __asm __volatile("cld; rep; insb" 18452419Sjulian : : "d" (port), "D" (addr), "c" (cnt) 18552419Sjulian : "di", "cx", "memory"); 18652419Sjulian} 18752419Sjulian 18852419Sjulianstatic __inline void 18952419Sjulianinsw(u_int port, void *addr, size_t cnt) 19052419Sjulian{ 19152419Sjulian __asm __volatile("cld; rep; insw" 19252419Sjulian : : "d" (port), "D" (addr), "c" (cnt) 19352419Sjulian : "di", "cx", "memory"); 19452419Sjulian} 19552419Sjulian 19652419Sjulianstatic __inline void 19752419Sjulianinsl(u_int port, void *addr, size_t cnt) 19852419Sjulian{ 19952419Sjulian __asm __volatile("cld; rep; insl" 20052419Sjulian : : "d" (port), "D" (addr), "c" (cnt) 20152419Sjulian : "di", "cx", "memory"); 20252419Sjulian} 20352419Sjulian 20452419Sjulianstatic __inline void 20552419Sjulianinvd(void) 20652419Sjulian{ 20752419Sjulian __asm __volatile("invd"); 20852419Sjulian} 20952419Sjulian 21052419Sjulian#if defined(SMP) && defined(SMP_INVLTLB) && defined(KERNEL) 21152419Sjulian 21252419Sjulian/* 21352419Sjulian * When using APIC IPI's, the inlining cost is prohibitive.. 21452419Sjulian */ 21552419Sjulianvoid invlpg __P((u_int addr)); 21652419Sjulianvoid invltlb __P((void)); 21752419Sjulian 21852419Sjulian#else 21952419Sjulian 22052419Sjulianstatic __inline void 22152419Sjulianinvlpg(u_int addr) 22252419Sjulian{ 22352419Sjulian __asm __volatile("invlpg (%0)" : : "r" (addr) : "memory"); 22452419Sjulian} 22552419Sjulian 22652419Sjulianstatic __inline void 22752419Sjulianinvltlb(void) 22852419Sjulian{ 22952419Sjulian u_long temp; 23052419Sjulian /* 23152419Sjulian * This should be implemented as load_cr3(rcr3()) when load_cr3() 23252419Sjulian * is inlined. 23352419Sjulian */ 23452419Sjulian __asm __volatile("movl %%cr3, %0; movl %0, %%cr3" : "=r" (temp) 23552419Sjulian : : "memory"); 23652419Sjulian} 23752419Sjulian#endif /* SMP && SMP_INVLTLB && KERNEL */ 23852419Sjulian 23952419Sjulianstatic __inline u_short 24052419Sjulianinw(u_int port) 24152419Sjulian{ 24252419Sjulian u_short data; 24352419Sjulian 24452419Sjulian __asm __volatile("inw %%dx,%0" : "=a" (data) : "d" (port)); 24552419Sjulian return (data); 24652419Sjulian} 24752419Sjulian 24852419Sjulianstatic __inline u_int 24952419Sjulianloadandclear(u_int *addr) 25052419Sjulian{ 25152419Sjulian u_int result; 25252419Sjulian 25352419Sjulian __asm __volatile("xorl %0,%0; xchgl %1,%0" 25452419Sjulian : "=&r" (result) : "m" (*addr)); 25552419Sjulian return (result); 25652419Sjulian} 25752419Sjulian 25852419Sjulianstatic __inline void 25952419Sjulianoutbv(u_int port, u_char data) 26052419Sjulian{ 26152419Sjulian u_char al; 26252419Sjulian /* 26352419Sjulian * Use an unnecessary assignment to help gcc's register allocator. 26452419Sjulian * This make a large difference for gcc-1.40 and a tiny difference 26552419Sjulian * for gcc-2.6.0. For gcc-1.40, al had to be ``asm("ax")'' for 26652419Sjulian * best results. gcc-2.6.0 can't handle this. 26752419Sjulian */ 26852419Sjulian al = data; 26952419Sjulian __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); 27052419Sjulian} 27152419Sjulian 27252419Sjulianstatic __inline void 27352419Sjulianoutl(u_int port, u_long data) 27452419Sjulian{ 27552419Sjulian /* 27652419Sjulian * outl() and outw() aren't used much so we haven't looked at 27752419Sjulian * possible micro-optimizations such as the unnecessary 27852419Sjulian * assignment for them. 27952419Sjulian */ 28052419Sjulian __asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port)); 28152419Sjulian} 28252419Sjulian 28352419Sjulianstatic __inline void 28452419Sjulianoutsb(u_int port, void *addr, size_t cnt) 28552419Sjulian{ 28652419Sjulian __asm __volatile("cld; rep; outsb" 28752419Sjulian : : "d" (port), "S" (addr), "c" (cnt) 28852419Sjulian : "si", "cx"); 28952419Sjulian} 29052419Sjulian 29152419Sjulianstatic __inline void 29252419Sjulianoutsw(u_int port, void *addr, size_t cnt) 29352419Sjulian{ 29452419Sjulian __asm __volatile("cld; rep; outsw" 29552419Sjulian : : "d" (port), "S" (addr), "c" (cnt) 29652419Sjulian : "si", "cx"); 29752419Sjulian} 29852419Sjulian 29952419Sjulianstatic __inline void 30052419Sjulianoutsl(u_int port, void *addr, size_t cnt) 30152419Sjulian{ 30252419Sjulian __asm __volatile("cld; rep; outsl" 30352419Sjulian : : "d" (port), "S" (addr), "c" (cnt) 30452419Sjulian : "si", "cx"); 30552419Sjulian} 30652419Sjulian 30752419Sjulianstatic __inline void 30852736Sjulianoutw(u_int port, u_short data) 30952419Sjulian{ 31052419Sjulian __asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port)); 31152736Sjulian} 31252419Sjulian 31352419Sjulianstatic __inline u_long 31452419Sjulianrcr2(void) 31552419Sjulian{ 31652419Sjulian u_long data; 31752419Sjulian 31852419Sjulian __asm __volatile("movl %%cr2,%0" : "=r" (data)); 31952419Sjulian return (data); 32052419Sjulian} 32152419Sjulian 32252419Sjulianstatic __inline u_long 32352419Sjulianread_eflags(void) 32452419Sjulian{ 32552419Sjulian u_long ef; 32652419Sjulian 32752419Sjulian __asm __volatile("pushfl; popl %0" : "=r" (ef)); 32852419Sjulian return (ef); 32952419Sjulian} 33052419Sjulian 33152419Sjulianstatic __inline quad_t 33252419Sjulianrdmsr(u_int msr) 33352419Sjulian{ 33452419Sjulian quad_t rv; 33552419Sjulian 33652419Sjulian __asm __volatile(".byte 0x0f, 0x32" : "=A" (rv) : "c" (msr)); 33752419Sjulian return (rv); 33852419Sjulian} 33952419Sjulian 34052419Sjulianstatic __inline quad_t 34152419Sjulianrdpmc(u_int pmc) 34252419Sjulian{ 34352419Sjulian quad_t rv; 34452419Sjulian 34552419Sjulian __asm __volatile(".byte 0x0f, 0x33" : "=A" (rv) : "c" (pmc)); 34652419Sjulian return (rv); 34752419Sjulian} 34852419Sjulian 34952419Sjulianstatic __inline quad_t 35052419Sjulianrdtsc(void) 35152419Sjulian{ 35252419Sjulian quad_t rv; 35352419Sjulian 35452419Sjulian __asm __volatile(".byte 0x0f, 0x31" : "=A" (rv)); 35552419Sjulian return (rv); 35652419Sjulian} 35752419Sjulian 35852419Sjulianstatic __inline void 35952419Sjuliansetbits(volatile unsigned *addr, u_int bits) 36052419Sjulian{ 36152419Sjulian __asm __volatile("orl %1,%0" : "=m" (*addr) : "ir" (bits)); 36252419Sjulian} 36352419Sjulian 36452419Sjulianstatic __inline void 36552419Sjulianwbinvd(void) 36652419Sjulian{ 36752419Sjulian __asm __volatile("wbinvd"); 36852419Sjulian} 36952419Sjulian 37052419Sjulianstatic __inline void 37152419Sjulianwrite_eflags(u_long ef) 37252419Sjulian{ 37352419Sjulian __asm __volatile("pushl %0; popfl" : : "r" (ef)); 37452419Sjulian} 37552419Sjulian 37652419Sjulianstatic __inline void 37752419Sjulianwrmsr(u_int msr, quad_t newval) 37852419Sjulian{ 37952419Sjulian __asm __volatile(".byte 0x0f, 0x30" : : "A" (newval), "c" (msr)); 38052419Sjulian} 38152419Sjulian 38252419Sjulian#else /* !__GNUC__ */ 38352419Sjulian 38452419Sjulianint breakpoint __P((void)); 38552419Sjulianvoid disable_intr __P((void)); 38652419Sjulianvoid enable_intr __P((void)); 38752419Sjulianu_char inb __P((u_int port)); 38852419Sjulianu_long inl __P((u_int port)); 38952419Sjulianvoid insb __P((u_int port, void *addr, size_t cnt)); 39052419Sjulianvoid insl __P((u_int port, void *addr, size_t cnt)); 39152419Sjulianvoid insw __P((u_int port, void *addr, size_t cnt)); 39252419Sjulianvoid invd __P((void)); 39352419Sjulianvoid invlpg __P((u_int addr)); 39452419Sjulianvoid invltlb __P((void)); 39552419Sjulianu_short inw __P((u_int port)); 39652419Sjulianu_int loadandclear __P((u_int *addr)); 39752419Sjulianvoid outb __P((u_int port, u_char data)); 39852419Sjulianvoid outl __P((u_int port, u_long data)); 39952419Sjulianvoid outsb __P((u_int port, void *addr, size_t cnt)); 40052419Sjulianvoid outsl __P((u_int port, void *addr, size_t cnt)); 40152419Sjulianvoid outsw __P((u_int port, void *addr, size_t cnt)); 40252419Sjulianvoid outw __P((u_int port, u_short data)); 40352419Sjulianu_long rcr2 __P((void)); 40452419Sjulianquad_t rdmsr __P((u_int msr)); 40552419Sjulianquad_t rdpmc __P((u_int pmc)); 40652419Sjulianquad_t rdtsc __P((void)); 40752419Sjulianu_long read_eflags __P((void)); 40852419Sjulianvoid setbits __P((volatile unsigned *addr, u_int bits)); 40952419Sjulianvoid wbinvd __P((void)); 41052419Sjulianvoid write_eflags __P((u_long ef)); 41152419Sjulianvoid wrmsr __P((u_int msr, quad_t newval)); 41252419Sjulian 41352419Sjulian#endif /* __GNUC__ */ 41452419Sjulian 41552419Sjulianvoid load_cr0 __P((u_long cr0)); 41652419Sjulianvoid load_cr3 __P((u_long cr3)); 41752419Sjulianvoid ltr __P((u_short sel)); 41852419Sjulianu_int rcr0 __P((void)); 41952419Sjulianu_long rcr3 __P((void)); 42052419Sjulian 42152419Sjulian#include <machine/spl.h> /* XXX belongs elsewhere */ 42252419Sjulian 42352419Sjulian#endif /* !_MACHINE_CPUFUNC_H_ */ 42452419Sjulian