Commit bb8187d3 authored by Paul Gortmaker's avatar Paul Gortmaker
Browse files

MCA: delete all remaining traces of microchannel bus support. 



Hardware with MCA bus is limited to 386 and 486 class machines
that are now 20+ years old and typically with less than 32MB
of memory.  A quick search on the internet, and you see that
even the MCA hobbyist/enthusiast community has lost interest
in the early 2000 era and never really even moved ahead from
the 2.4 kernels to the 2.6 series.

This deletes anything remaining related to CONFIG_MCA from core
kernel code and from the x86 architecture.  There is no point in
carrying this any further into the future.

One complication to watch for is inadvertently scooping up
stuff relating to machine check, since there is overlap in
the TLA name space (e.g. arch/x86/boot/mca.c).

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: x86@kernel.org
Acked-by: default avatarIngo Molnar <mingo@elte.hu>
Acked-by: default avatarH. Peter Anvin <hpa@zytor.com>
Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
parent a88dc06c

Documentation/00-INDEX

+0 −2
Original line number Diff line number Diff line
@@ -218,8 +218,6 @@ m68k/ 
	- directory with info about Linux on Motorola 68k architecture.

magic-number.txt

	- list of magic numbers used to mark/protect kernel data structures.

mca.txt

	- info on supporting Micro Channel Architecture (e.g. PS/2) systems.

md.txt

	- info on boot arguments for the multiple devices driver.

memory-barriers.txt

Documentation/DocBook/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ 
# To add a new book the only step required is to add the book to the

# list of DOCBOOKS.



DOCBOOKS := z8530book.xml mcabook.xml device-drivers.xml \

DOCBOOKS := z8530book.xml device-drivers.xml \

	    kernel-hacking.xml kernel-locking.xml deviceiobook.xml \

	    writing_usb_driver.xml networking.xml \

	    kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \

Documentation/DocBook/kernel-api.tmpl

+0 −13
Original line number Diff line number Diff line
@@ -212,19 +212,6 @@ X!Edrivers/pci/hotplug.c 
     <sect1><title>PCI Hotplug Support Library</title>

!Edrivers/pci/hotplug/pci_hotplug_core.c

     </sect1>

     <sect1><title>MCA Architecture</title>

	<sect2><title>MCA Device Functions</title>

           <para>

              Refer to the file arch/x86/kernel/mca_32.c for more information.

           </para>

<!-- FIXME: Removed for now since no structured comments in source

X!Earch/x86/kernel/mca_32.c

-->

	</sect2>

	<sect2><title>MCA Bus DMA</title>

!Iarch/x86/include/asm/mca_dma.h

	</sect2>

     </sect1>

  </chapter>



  <chapter id="firmware">

Documentation/DocBook/mcabook.tmpl

deleted100644 → 0
+0 −107
Original line number Diff line number Diff line 
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"

	"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>



<book id="MCAGuide">

 <bookinfo>

  <title>MCA Driver Programming Interface</title>

  

  <authorgroup>

   <author>

    <firstname>Alan</firstname>

    <surname>Cox</surname>

    <affiliation>

     <address>

      <email>alan@lxorguk.ukuu.org.uk</email>

     </address>

    </affiliation>

   </author>

   <author>

    <firstname>David</firstname>

    <surname>Weinehall</surname>

   </author>

   <author>

    <firstname>Chris</firstname>

    <surname>Beauregard</surname>

   </author>

  </authorgroup>



  <copyright>

   <year>2000</year>

   <holder>Alan Cox</holder>

   <holder>David Weinehall</holder>

   <holder>Chris Beauregard</holder>

  </copyright>



  <legalnotice>

   <para>

     This documentation 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.

   </para>

      

   <para>

     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.

   </para>

      

   <para>

     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

   </para>

      

   <para>

     For more details see the file COPYING in the source

     distribution of Linux.

   </para>

  </legalnotice>

 </bookinfo>



<toc></toc>



  <chapter id="intro">

      <title>Introduction</title>

  <para>

	The MCA bus functions provide a generalised interface to find MCA

	bus cards, to claim them for a driver, and to read and manipulate POS 

	registers without being aware of the motherboard internals or 

	certain deep magic specific to onboard devices.

  </para>

  <para>

	The basic interface to the MCA bus devices is the slot. Each slot

	is numbered and virtual slot numbers are assigned to the internal

	devices. Using a pci_dev as other busses do does not really make

	sense in the MCA context as the MCA bus resources require card

	specific interpretation.

  </para>

  <para>

	Finally the MCA bus functions provide a parallel set of DMA

	functions mimicing the ISA bus DMA functions as closely as possible,

	although also supporting the additional DMA functionality on the

	MCA bus controllers.

  </para>

  </chapter>

  <chapter id="bugs">

     <title>Known Bugs And Assumptions</title>

  <para>

	None.	

  </para>

  </chapter>



  <chapter id="pubfunctions">

     <title>Public Functions Provided</title>

!Edrivers/mca/mca-legacy.c

  </chapter>



  <chapter id="dmafunctions">

     <title>DMA Functions Provided</title>

!Iarch/x86/include/asm/mca_dma.h

  </chapter>



</book>

Documentation/devices.txt

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@@ -846,13 +846,7 @@ Your cooperation is appreciated. 
		    ...

		 31 = /dev/tap15	16th Ethertap device



 36 block	MCA ESDI hard disk

		  0 = /dev/eda		First ESDI disk whole disk

		 64 = /dev/edb		Second ESDI disk whole disk

		    ...



		Partitions are handled in the same way as IDE disks

		(see major number 3).

 36 block	OBSOLETE (was MCA ESDI hard disk)



 37 char	IDE tape

		  0 = /dev/ht0		First IDE tape

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