adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-28 11:46:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

[PATCH] s390: documentation update

Browse source 
Fix typos and add a section about cpus in the driver-model documentation.

Signed-off-by: Cornelia Huck <cohuck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cornelia Huck 2005-11-07 00:59:03 -08:00 committed by Linus Torvalds
parent 1b44e98d7d
commit 373c491f6d
1 changed files with 12 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
Documentation/s390/driver-model.txt
View file

@ -8,11 +8,10 @@ All devices which can be addressed by means of ccws are called 'CCW devices' -
even if they aren't actually driven by ccws. even if they aren't actually driven by ccws.
All ccw devices are accessed via a subchannel, this is reflected in the All ccw devices are accessed via a subchannel, this is reflected in the
structures under root/: structures under devices/:
root/ devices/
- sys - system/
- legacy
- css0/ - css0/
- 0.0.0000/0.0.0815/ - 0.0.0000/0.0.0815/
- 0.0.0001/0.0.4711/ - 0.0.0001/0.0.4711/
@ -36,7 +35,7 @@ availability: Can be 'good' or 'boxed'; 'no path' or 'no device' for
online: An interface to set the device online and offline. online: An interface to set the device online and offline.
In the special case of the device being disconnected (see the In the special case of the device being disconnected (see the
notify function under 1.2), piping 0 to online will focibly delete notify function under 1.2), piping 0 to online will forcibly delete
the device. the device.
The device drivers can add entries to export per-device data and interfaces. The device drivers can add entries to export per-device data and interfaces.
@ -222,7 +221,7 @@ and are called 'chp0.<chpid>'. They have no driver and do not belong to any bus.
Please note, that unlike /proc/chpids in 2.4, the channel path objects reflect Please note, that unlike /proc/chpids in 2.4, the channel path objects reflect
only the logical state and not the physical state, since we cannot track the only the logical state and not the physical state, since we cannot track the
latter consistently due to lacking machine support (we don't need to be aware latter consistently due to lacking machine support (we don't need to be aware
of anyway). of it anyway).
status - Can be 'online' or 'offline'. status - Can be 'online' or 'offline'.
Piping 'on' or 'off' sets the chpid logically online/offline. Piping 'on' or 'off' sets the chpid logically online/offline.
@ -235,12 +234,16 @@ status - Can be 'online' or 'offline'.
3. System devices 3. System devices
----------------- -----------------
Note: cpus may yet be added here.
3.1 xpram 3.1 xpram
--------- ---------
xpram shows up under sys/ as 'xpram'. xpram shows up under devices/system/ as 'xpram'.
3.2 cpus
--------
For each cpu, a directory is created under devices/system/cpu/. Each cpu has an
attribute 'online' which can be 0 or 1.
4. Other devices 4. Other devices