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Annotation of Gnu-Mach/i386/grub/cpu/io.h, revision 1.1

1.1     ! root        1: /*
        !             2:  *  GRUB  --  GRand Unified Bootloader
        !             3:  *  Copyright (C) 1996,2000,2002,2007  Free Software Foundation, Inc.
        !             4:  *
        !             5:  *  GRUB is free software: you can redistribute it and/or modify
        !             6:  *  it under the terms of the GNU General Public License as published by
        !             7:  *  the Free Software Foundation, either version 3 of the License, or
        !             8:  *  (at your option) any later version.
        !             9:  *
        !            10:  *  GRUB is distributed in the hope that it will be useful,
        !            11:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            13:  *  GNU General Public License for more details.
        !            14:  *
        !            15:  *  You should have received a copy of the GNU General Public License
        !            16:  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
        !            17:  */
        !            18: 
        !            19: /* Based on sys/io.h from GNU libc. */
        !            20: 
        !            21: #ifndef        GRUB_IO_H
        !            22: #define        GRUB_IO_H       1
        !            23: 
        !            24: typedef unsigned short int grub_port_t;
        !            25: 
        !            26: static __inline unsigned char
        !            27: grub_inb (unsigned short int port)
        !            28: {
        !            29:   unsigned char _v;
        !            30: 
        !            31:   __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
        !            32:   return _v;
        !            33: }
        !            34: 
        !            35: static __inline unsigned short int
        !            36: grub_inw (unsigned short int port)
        !            37: {
        !            38:   unsigned short _v;
        !            39: 
        !            40:   __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (port));
        !            41:   return _v;
        !            42: }
        !            43: 
        !            44: static __inline unsigned int
        !            45: grub_inl (unsigned short int port)
        !            46: {
        !            47:   unsigned int _v;
        !            48: 
        !            49:   __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (port));
        !            50:   return _v;
        !            51: }
        !            52: 
        !            53: static __inline void
        !            54: grub_outb (unsigned char value, unsigned short int port)
        !            55: {
        !            56:   __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
        !            57: }
        !            58: 
        !            59: static __inline void
        !            60: grub_outw (unsigned short int value, unsigned short int port)
        !            61: {
        !            62:   __asm__ __volatile__ ("outw %w0,%w1": :"a" (value), "Nd" (port));
        !            63: 
        !            64: }
        !            65: 
        !            66: static __inline void
        !            67: grub_outl (unsigned int value, unsigned short int port)
        !            68: {
        !            69:   __asm__ __volatile__ ("outl %0,%w1": :"a" (value), "Nd" (port));
        !            70: }
        !            71: 
        !            72: #endif /* _SYS_IO_H */

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