342 lines
7.1 KiB
C
342 lines
7.1 KiB
C
/* $XFree86: mit/server/ddx/x386/common/compiler.h,v 2.3 1993/10/03 14:55:28 dawes Exp $ */
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/*
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* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Thomas Roell not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Thomas Roell makes no representations
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* about the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*
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* THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THOMAS ROELL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* $Header: /proj/X11/mit/server/ddx/x386/RCS/compiler.h,v 1.2 1991/06/27 00:01:11 root Exp $
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*/
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#ifndef _COMPILER_H
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#define _COMPILER_H
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#ifndef __STDC__
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# ifdef signed
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# undef signed
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# endif
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# ifdef volatile
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# undef volatile
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# endif
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# ifdef const
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# undef const
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# endif
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# define signed /**/
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# ifdef __GNUC__
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# define volatile __volatile__
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# define const __const__
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# else
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# define const /**/
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# endif /* __GNUC__ */
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#endif /* !__STDC__ */
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#ifdef NO_INLINE
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extern void outb();
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extern void outw();
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extern unsigned int inb();
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extern unsigned int inw();
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#if NeedFunctionPrototypes
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extern unsigned char rdinx(unsigned short, unsigned char);
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extern void wrinx(unsigned short, unsigned char, unsigned char);
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extern void modinx(unsigned short, unsigned char, unsigned char, unsigned char);
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extern int testrg(unsigned short, unsigned char);
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extern int textinx2(unsigned short, unsigned char, unsigned char);
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extern int textinx(unsigned short, unsigned char);
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#else /* NeedFunctionProtoypes */
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extern unsigned char rdinx();
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extern void wrinx();
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extern void modinx();
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extern int testrg();
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extern int textinx2();
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extern int textinx();
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#endif /* NeedFunctionProtoypes */
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#else /* NO_INLINE */
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#ifdef __GNUC__
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#ifndef FAKEIT
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#ifdef GCCUSESGAS
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/*
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* If gcc uses gas rather than the native assembler, the syntax of these
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* inlines has to be different. DHD
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*/
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static __inline__ void
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outb(port, val)
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short port;
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char val;
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{
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__asm__ __volatile__("outb %0,%1" : :"a" (val), "d" (port));
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}
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static __inline__ void
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outw(port, val)
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short port;
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short val;
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{
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__asm__ __volatile__("outw %0,%1" : :"a" (val), "d" (port));
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}
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static __inline__ unsigned int
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inb(port)
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short port;
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{
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unsigned char ret;
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__asm__ __volatile__("inb %1,%0" :
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"=a" (ret) :
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"d" (port));
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return ret;
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}
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static __inline__ unsigned int
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inw(port)
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short port;
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{
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unsigned short ret;
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__asm__ __volatile__("inw %1,%0" :
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"=a" (ret) :
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"d" (port));
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return ret;
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}
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#else /* GCCUSESGAS */
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static __inline__ void
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outb(port, val)
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short port;
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char val;
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{
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__asm__ __volatile__("out%B0 (%1)" : :"a" (val), "d" (port));
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}
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static __inline__ void
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outw(port, val)
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short port;
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short val;
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{
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__asm__ __volatile__("out%W0 (%1)" : :"a" (val), "d" (port));
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}
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static __inline__ unsigned int
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inb(port)
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short port;
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{
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unsigned char ret;
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__asm__ __volatile__("in%B0 (%1)" :
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"=a" (ret) :
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"d" (port));
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return ret;
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}
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static __inline__ unsigned int
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inw(port)
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short port;
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{
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unsigned short ret;
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__asm__ __volatile__("in%W0 (%1)" :
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"=a" (ret) :
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"d" (port));
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return ret;
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}
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#endif /* GCCUSESGAS */
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#else /* FAKEIT */
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static __inline__ void
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outb(port, val)
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short port;
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char val;
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{
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}
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static __inline__ void
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outw(port, val)
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short port;
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short val;
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{
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}
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static __inline__ unsigned int
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inb(port)
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short port;
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{
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return 0;
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}
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static __inline__ unsigned int
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inw(port)
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short port;
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{
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return 0;
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}
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#endif /* FAKEIT */
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#else /* __GNUC__ */
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#if !defined(AMOEBA) && !defined(_MINIX)
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# if defined(__STDC__) && (__STDC__ == 1)
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# define asm __asm
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# endif
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# ifdef SVR4
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# include <sys/types.h>
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# ifndef __USLC__
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# define __USLC__
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# endif
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# endif
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# include <sys/inline.h>
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#endif
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#endif
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/*
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*-----------------------------------------------------------------------
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* Port manipulation convenience functions
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*-----------------------------------------------------------------------
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*/
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#ifndef __GNUC__
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#define __inline__ /**/
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#endif
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/*
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* rdinx - read the indexed byte port 'port', index 'ind', and return its value
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*/
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static __inline__ unsigned char
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#ifdef __STDC__
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rdinx(unsigned short port, unsigned char ind)
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#else
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rdinx(port, ind)
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unsigned short port;
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unsigned char ind;
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#endif
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{
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if (port == 0x3C0) /* reset attribute flip-flop */
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(void) inb(0x3DA);
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outb(port, ind);
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return(inb(port+1));
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}
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/*
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* wrinx - write 'val' to port 'port', index 'ind'
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*/
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static __inline__ void
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#ifdef __STDC__
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wrinx(unsigned short port, unsigned char ind, unsigned char val)
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#else
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wrinx(port, ind, val)
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unsigned short port;
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unsigned char ind, val;
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#endif
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{
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outb(port, ind);
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outb(port+1, val);
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}
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/*
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* modinx - in register 'port', index 'ind', set the bits in 'mask' as in 'new';
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* the other bits are unchanged.
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*/
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static __inline__ void
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#ifdef __STDC__
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modinx(unsigned short port, unsigned char ind,
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unsigned char mask, unsigned char new)
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#else
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modinx(port, ind, mask, new)
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unsigned short port;
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unsigned char ind, mask, new;
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#endif
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{
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unsigned char tmp;
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tmp = (rdinx(port, ind) & ~mask) | (new & mask);
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wrinx(port, ind, tmp);
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}
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/*
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* tstrg - returns true iff the bits in 'mask' of register 'port' are
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* readable & writable.
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*/
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static __inline__ int
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#ifdef __STDC__
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testrg(unsigned short port, unsigned char mask)
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#else
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tstrg(port, mask)
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unsigned short port;
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unsigned char mask;
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#endif
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{
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unsigned char old, new1, new2;
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old = inb(port);
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outb(port, old & ~mask);
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new1 = inb(port) & mask;
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outb(port, old | mask);
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new2 = inb(port) & mask;
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outb(port, old);
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return((new1 == 0) && (new2 == mask));
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}
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/*
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* testinx2 - returns true iff the bits in 'mask' of register 'port', index
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* 'ind' are readable & writable.
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*/
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static __inline__ int
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#ifdef __STDC__
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testinx2(unsigned short port, unsigned char ind, unsigned char mask)
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#else
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testinx2(port, ind, mask)
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unsigned short port;
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unsigned char ind, mask;
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#endif
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{
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unsigned char old, new1, new2;
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old = rdinx(port, ind);
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wrinx(port, ind, old & ~mask);
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new1 = rdinx(port, ind) & mask;
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wrinx(port, ind, old | mask);
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new2 = rdinx(port, ind) & mask;
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wrinx(port, ind, old);
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return((new1 == 0) && (new2 == mask));
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}
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/*
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* testinx - returns true iff all bits of register 'port', index 'ind' are
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* readable & writable.
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*/
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static __inline__ int
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#ifdef __STDC__
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testinx(unsigned short port, unsigned char ind)
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#else
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testinx(port, ind, mask)
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unsigned short port;
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unsigned char ind;
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#endif
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{
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return(testinx2(port, ind, 0xFF));
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}
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#endif /* NO_INLINE */
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#endif /* _COMPILER_H */
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