Some 'igor -z' improvements.
Approved by: gjb (mentor)
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svn2git
2020-12-08 03:00:23 +00:00
svn path=/head/; revision=40923
1 changed files with 8 additions and 8 deletions
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@ -31,7 +31,7 @@
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</authorgroup>
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</chapterinfo>
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<title>ISA device drivers</title>
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<title>ISA Device Drivers</title>
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<sect1 id="isa-driver-synopsis">
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<title>Synopsis</title>
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</sect1>
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<sect1 id="isa-driver-basics">
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<title>Basic information</title>
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<title>Basic Information</title>
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<para>A typical ISA driver would need the following include
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files:</para>
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</sect1>
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<sect1 id="isa-driver-device-t">
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<title>Device_t pointer</title>
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<title>Device_t Pointer</title>
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<para><structname>Device_t</structname> is the pointer type for
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the device structure. Here we consider only the methods
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</sect1>
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<sect1 id="isa-driver-config">
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<title>Configuration file and the order of identifying and probing
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during auto-configuration</title>
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<title>Configuration File and the Order of Identifying and Probing
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During Auto-Configuration</title>
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<indexterm><primary>ISA</primary><secondary>probing</secondary></indexterm>
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@ -593,7 +593,7 @@
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<listitem>
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<para><emphasis>RF_TIMESHARE</emphasis> - resource may be
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time-shared by multiple drivers, i.e. allocated at the
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time-shared by multiple drivers, i.e., allocated at the
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same time by many but activated only by one at any given
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moment of time.</para>
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</listitem>
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</sect1>
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<sect1 id="isa-driver-busmem">
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<title>Bus memory mapping</title>
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<title>Bus Memory Mapping</title>
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<para>In many cases data is exchanged between the driver and the
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device through the memory. Two variants are possible:</para>
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the future <function>bus_dmamem_alloc()</function> but
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not <function>bus_dmamap_create()</function> calls.
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Must be power of 2. If the memory is planned to be used
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in non-cascaded DMA mode (i.e. the DMA addresses will be
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in non-cascaded DMA mode (i.e., the DMA addresses will be
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supplied not by the device itself but by the ISA DMA
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controller) then the boundary must be no larger than
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64KB (64*1024) due to the limitations of the DMA
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