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Annotation of Net2/arch/i386/include/pio.h, revision 1.1.1.2

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1990 Carnegie-Mellon University
                      4:  * All rights reserved.  The CMU software License Agreement specifies
                      5:  * the terms and conditions for use and redistribution.
1.1.1.2 ! root        6:  *
        !             7:  *     pio.h,v 1.3 1993/06/06 04:16:22 cgd Exp
1.1       root        8:  */
                      9: /* 
                     10:  * HISTORY
1.1.1.2 ! root       11:  * pio.h,v
        !            12:  * Revision 1.3  1993/06/06  04:16:22  cgd
        !            13:  * incorporate Bruce Evans' interrupt changes, as hacked by Rod grimes,
        !            14:  * for patchkit patch 158.  it appears to work well.
        !            15:  *
        !            16:  * Revision 1.2  1993/05/22  08:00:27  cgd
        !            17:  * add rcsids to everything and clean up headers
        !            18:  *
        !            19:  * Revision 1.1  1993/03/21  18:09:48  cgd
1.1       root       20:  * after 0.2.2 "stable" patches applied
                     21:  *
                     22:  * Revision 1.1  1992/05/27  00:48:30  balsup
                     23:  * machkern/cor merge
                     24:  *
                     25:  * Revision 1.1  1991/10/10  20:11:39  balsup
                     26:  * Initial revision
                     27:  *
                     28:  * Revision 2.2  91/04/02  11:52:29  mbj
                     29:  *     [90/08/14            mg32]
                     30:  * 
                     31:  *     Now we know how types are factor in.
                     32:  *     Cleaned up a bunch: eliminated ({ for output and flushed unused
                     33:  *     output variables.
                     34:  *     [90/08/14            rvb]
                     35:  * 
                     36:  *     This is how its done in gcc:
                     37:  *             Created.
                     38:  *     [90/03/26            rvb]
                     39:  * 
                     40:  */
                     41: 
                     42: 
                     43: #define inl(y) \
                     44: ({ unsigned long _tmp__; \
                     45:        asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
                     46:        _tmp__; })
                     47: 
                     48: #define inw(y) \
                     49: ({ unsigned short _tmp__; \
                     50:        asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
                     51:        _tmp__; })
                     52: 
1.1.1.2 ! root       53: /*
        !            54:  * only do this if it has not already be defined.. this is a crock for the
        !            55:  * patch kit for right now.  Need to clean up all the inx, outx stuff for
        !            56:  * 0.1.5 to use 1 common header file, that has Bruces fast mode inb/outb
        !            57:  * stuff in it.  Rgrimes 5/27/93
        !            58:  */
        !            59: #ifndef inb
1.1       root       60: #define inb(y) \
                     61: ({ unsigned char _tmp__; \
                     62:        asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((unsigned short)(y))); \
                     63:        _tmp__; })
1.1.1.2 ! root       64: #endif
1.1       root       65: 
                     66: 
                     67: #define outl(x, y) \
                     68: { asm volatile("outl %0, %1" : : "a" (y) , "d" ((unsigned short)(x))); }
                     69: 
                     70: 
                     71: #define outw(x, y) \
                     72: {asm volatile(".byte 0x66; outl %0, %1" : : "a" ((unsigned short)(y)) , "d" ((unsigned short)(x))); }
                     73: 
                     74: 
                     75: #define outb(x, y) \
                     76: { asm volatile("outb %0, %1" : : "a" ((unsigned char)(y)) , "d" ((unsigned short)(x))); }

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