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| author | Alex AUVOLAT <alex.auvolat@ens.fr> | 2014-03-28 17:09:15 +0100 |
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| committer | Alex AUVOLAT <alex.auvolat@ens.fr> | 2014-03-28 17:09:15 +0100 |
| commit | a8968330aff45e0b8cf278f49fa337d5fcb9bfd8 (patch) | |
| tree | dedf697b1a5c3c96e77f77e551e9e6af8785a51c /sos-code-article6.5/hwcore/ioports.h | |
| parent | 8d9e22df8afa4c3339e52c7b3b77388ca0e69fac (diff) | |
| download | SOS-a8968330aff45e0b8cf278f49fa337d5fcb9bfd8.tar.gz SOS-a8968330aff45e0b8cf278f49fa337d5fcb9bfd8.zip | |
Import and compile code for article 6.5
Diffstat (limited to 'sos-code-article6.5/hwcore/ioports.h')
| -rw-r--r-- | sos-code-article6.5/hwcore/ioports.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sos-code-article6.5/hwcore/ioports.h b/sos-code-article6.5/hwcore/ioports.h new file mode 100644 index 0000000..69c6d15 --- /dev/null +++ b/sos-code-article6.5/hwcore/ioports.h @@ -0,0 +1,46 @@ +/* Copyright (C) 2004 All GPL'ed OS + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 2 + of the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + USA. +*/ +#ifndef _SOS_IOPORTS_H_ +#define _SOS_IOPORTS_H_ + +/** + * @ioports.h + * + * Intel-specific I/O space access routines. + */ + +/* This macro allows to write to an I/O port */ +#define outb(value, port) \ + __asm__ volatile ( \ + "outb %b0,%w1" \ + ::"a" (value),"Nd" (port) \ + ) \ + +// read one byte from port +#define inb(port) \ +({ \ + unsigned char _v; \ + __asm__ volatile ( \ + "inb %w1,%0" \ + :"=a" (_v) \ + :"Nd" (port) \ + ); \ + _v; \ +}) + +#endif /* _SOS_IOPORTS_H_ */ |