Permalink
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: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
  • Loading branch information...
1 parent a88dc06 commit bb8187d35f820671d6dd76700d77a6b55f95e2c5 @paulgortmaker paulgortmaker committed May 17, 2012
View
@@ -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
@@ -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 \
@@ -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">
@@ -1,107 +0,0 @@
-<?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>
@@ -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
View
@@ -179,7 +179,7 @@ CONFIG_ALPHA_JENSEN or CONFIG_EISA_VLB_PRIMING are set.
Converting an EISA driver to the new API mostly involves *deleting*
code (since probing is now in the core EISA code). Unfortunately, most
-drivers share their probing routine between ISA, MCA and EISA. Special
+drivers share their probing routine between ISA, and EISA. Special
care must be taken when ripping out the EISA code, so other busses
won't suffer from these surgical strikes...
@@ -70,7 +70,6 @@ parameter is applicable:
M68k M68k architecture is enabled.
These options have more detailed description inside of
Documentation/m68k/kernel-options.txt.
- MCA MCA bus support is enabled.
MDA MDA console support is enabled.
MIPS MIPS architecture is enabled.
MOUSE Appropriate mouse support is enabled.
Oops, something went wrong.

0 comments on commit bb8187d

Please sign in to comment.