<chapter id="mmio">
<title>Memory Mapped IO</title>
- <sect1>
+ <sect1 id="getting_access_to_the_device">
<title>Getting Access to the Device</title>
<para>
The most widely supported form of IO is memory mapped IO.
</para>
</sect1>
- <sect1>
+ <sect1 id="accessing_the_device">
<title>Accessing the device</title>
<para>
The part of the interface most used by drivers is reading and
</para>
</sect1>
- <sect1>
- <title>ISA legacy functions</title>
- <para>
- On older kernels (2.2 and earlier) the ISA bus could be read or
- written with these functions and without ioremap being used. This is
- no longer true in Linux 2.4. A set of equivalent functions exist for
- easy legacy driver porting. The functions available are prefixed
- with 'isa_' and are <function>isa_readb</function>,
- <function>isa_writeb</function>, <function>isa_readw</function>,
- <function>isa_writew</function>, <function>isa_readl</function>,
- <function>isa_writel</function>, <function>isa_memcpy_fromio</function>
- and <function>isa_memcpy_toio</function>
- </para>
- <para>
- These functions should not be used in new drivers, and will
- eventually be going away.
- </para>
- </sect1>
-
</chapter>
- <chapter>
+ <chapter id="port_space_accesses">
<title>Port Space Accesses</title>
- <sect1>
+ <sect1 id="port_space_explained">
<title>Port Space Explained</title>
<para>
</para>
</sect1>
- <sect1>
+ <sect1 id="accessing_port_space">
<title>Accessing Port Space</title>
<para>
Accesses to this space are provided through a set of functions
<chapter id="pubfunctions">
<title>Public Functions Provided</title>
-!Einclude/asm-i386/io.h
+!Iinclude/asm-x86/io_32.h
+!Elib/iomap.c
</chapter>
</book>